/Users/deen/code/yugabyte-db/build/debugcov-clang-dynamic-arm64-ninja/postgres_build/src/bin/psql/psqlscanslash.c

Source (jump to first uncovered line)
#line 1 "psqlscanslash.c"
/*-------------------------------------------------------------------------
 *
 * psqlscanslash.l
 *    lexical scanner for psql backslash commands
 *
 * XXX Avoid creating backtracking cases --- see the backend lexer for info.
 *
 * See fe_utils/psqlscan_int.h for additional commentary.
 *
 * Portions Copyright (c) 1996-2018, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * IDENTIFICATION
 *    src/bin/psql/psqlscanslash.l
 *
 *-------------------------------------------------------------------------
 */
#include "postgres_fe.h"

#include "psqlscanslash.h"
#include "fe_utils/conditional.h"

#include "libpq-fe.h"

#line 26 "psqlscanslash.c"

#define  YY_INT_ALIGNED short int

/* A lexical scanner generated by flex */

#define FLEX_SCANNER
#define YY_FLEX_MAJOR_VERSION 2
#define YY_FLEX_MINOR_VERSION 6
#define YY_FLEX_SUBMINOR_VERSION 3
#if YY_FLEX_SUBMINOR_VERSION > 0
#define FLEX_BETA
#endif

    #define yy_create_buffer slash_yy_create_buffer

    #define yy_delete_buffer slash_yy_delete_buffer

    #define yy_scan_buffer slash_yy_scan_buffer

    #define yy_scan_string slash_yy_scan_string

    #define yy_scan_bytes slash_yy_scan_bytes

    #define yy_init_buffer slash_yy_init_buffer

    #define yy_flush_buffer slash_yy_flush_buffer

    #define yy_load_buffer_state slash_yy_load_buffer_state

    #define yy_switch_to_buffer slash_yy_switch_to_buffer

    #define yypush_buffer_state slash_yypush_buffer_state

    #define yypop_buffer_state slash_yypop_buffer_state

    #define yyensure_buffer_stack slash_yyensure_buffer_stack

    #define yylex slash_yylex

    #define yyrestart slash_yyrestart

    #define yylex_init slash_yylex_init

    #define yylex_init_extra slash_yylex_init_extra

    #define yylex_destroy slash_yylex_destroy

    #define yyget_debug slash_yyget_debug

    #define yyset_debug slash_yyset_debug

    #define yyget_extra slash_yyget_extra

    #define yyset_extra slash_yyset_extra

    #define yyget_in slash_yyget_in

    #define yyset_in slash_yyset_in

    #define yyget_out slash_yyget_out

    #define yyset_out slash_yyset_out

    #define yyget_leng slash_yyget_leng

    #define yyget_text slash_yyget_text

    #define yyget_lineno slash_yyget_lineno

    #define yyset_lineno slash_yyset_lineno

        #define yyget_column slash_yyget_column

        #define yyset_column slash_yyset_column

    #define yywrap slash_yywrap

    #define yyget_lval slash_yyget_lval

    #define yyset_lval slash_yyset_lval

    #define yyalloc slash_yyalloc

    #define yyrealloc slash_yyrealloc

    #define yyfree slash_yyfree

/* First, we deal with  platform-specific or compiler-specific issues. */

/* begin standard C headers. */
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <stdlib.h>

/* end standard C headers. */

/* flex integer type definitions */

#ifndef FLEXINT_H
#define FLEXINT_H

/* C99 systems have <inttypes.h>. Non-C99 systems may or may not. */

#if defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L

/* C99 says to define __STDC_LIMIT_MACROS before including stdint.h,
 * if you want the limit (max/min) macros for int types. 
 */
#ifndef __STDC_LIMIT_MACROS
#define __STDC_LIMIT_MACROS 1
#endif

#include <inttypes.h>
typedef int8_t flex_int8_t;
typedef uint8_t flex_uint8_t;
typedef int16_t flex_int16_t;
typedef uint16_t flex_uint16_t;
typedef int32_t flex_int32_t;
typedef uint32_t flex_uint32_t;
#else
typedef signed char flex_int8_t;
typedef short int flex_int16_t;
typedef int flex_int32_t;
typedef unsigned char flex_uint8_t; 
typedef unsigned short int flex_uint16_t;
typedef unsigned int flex_uint32_t;

/* Limits of integral types. */
#ifndef INT8_MIN
#define INT8_MIN               (-128)
#endif
#ifndef INT16_MIN
#define INT16_MIN              (-32767-1)
#endif
#ifndef INT32_MIN
#define INT32_MIN              (-2147483647-1)
#endif
#ifndef INT8_MAX
#define INT8_MAX               (127)
#endif
#ifndef INT16_MAX
#define INT16_MAX              (32767)
#endif
#ifndef INT32_MAX
#define INT32_MAX              (2147483647)
#endif
#ifndef UINT8_MAX
#define UINT8_MAX              (255U)
#endif
#ifndef UINT16_MAX
#define UINT16_MAX             (65535U)
#endif
#ifndef UINT32_MAX
#define UINT32_MAX             (4294967295U)
#endif

#endif /* ! C99 */

#endif /* ! FLEXINT_H */

/* TODO: this is always defined, so inline it */
#define yyconst const

#if defined(__GNUC__) && __GNUC__ >= 3
#define yynoreturn __attribute__((__noreturn__))
#else
#define yynoreturn
#endif

/* Returned upon end-of-file. */
#define YY_NULL 0

/* Promotes a possibly negative, possibly signed char to an
 *   integer in range [0..255] for use as an array index.
 */
#define YY_SC_TO_UI(c) ((YY_CHAR) (c))

/* An opaque pointer. */
#ifndef YY_TYPEDEF_YY_SCANNER_T
#define YY_TYPEDEF_YY_SCANNER_T
typedef void* yyscan_t;
#endif

/* For convenience, these vars (plus the bison vars far below)
   are macros in the reentrant scanner. */
#define yyin yyg->yyin_r
#define yyout yyg->yyout_r
#define yyextra yyg->yyextra_r
#define yyleng yyg->yyleng_r
#define yytext yyg->yytext_r
#define yylineno (YY_CURRENT_BUFFER_LVALUE->yy_bs_lineno)
#define yycolumn (YY_CURRENT_BUFFER_LVALUE->yy_bs_column)
#define yy_flex_debug yyg->yy_flex_debug_r

/* Enter a start condition.  This macro really ought to take a parameter,
 * but we do it the disgusting crufty way forced on us by the ()-less
 * definition of BEGIN.
 */
#define BEGIN yyg->yy_start = 1 + 2 *
/* Translate the current start state into a value that can be later handed
 * to BEGIN to return to the state.  The YYSTATE alias is for lex
 * compatibility.
 */
#define YY_START ((yyg->yy_start - 1) / 2)
#define YYSTATE YY_START
/* Action number for EOF rule of a given start state. */
#define YY_STATE_EOF(state) (YY_END_OF_BUFFER + state + 1)
/* Special action meaning "start processing a new file". */
#define YY_NEW_FILE slash_yyrestart(yyin ,yyscanner )
#define YY_END_OF_BUFFER_CHAR 0

/* Size of default input buffer. */
#ifndef YY_BUF_SIZE
#ifdef __ia64__
/* On IA-64, the buffer size is 16k, not 8k.
 * Moreover, YY_BUF_SIZE is 2*YY_READ_BUF_SIZE in the general case.
 * Ditto for the __ia64__ case accordingly.
 */
#define YY_BUF_SIZE 32768
#else
#define YY_BUF_SIZE 16384
#endif /* __ia64__ */
#endif

/* The state buf must be large enough to hold one state per character in the main buffer.
 */
#define YY_STATE_BUF_SIZE   ((YY_BUF_SIZE + 2) * sizeof(yy_state_type))

#ifndef YY_TYPEDEF_YY_BUFFER_STATE
#define YY_TYPEDEF_YY_BUFFER_STATE
typedef struct yy_buffer_state *YY_BUFFER_STATE;
#endif

#ifndef YY_TYPEDEF_YY_SIZE_T
#define YY_TYPEDEF_YY_SIZE_T
typedef size_t yy_size_t;
#endif

#define EOB_ACT_CONTINUE_SCAN 0
#define EOB_ACT_END_OF_FILE 1
#define EOB_ACT_LAST_MATCH 2
    
    #define YY_LESS_LINENO(n)
    #define YY_LINENO_REWIND_TO(ptr)
    
/* Return all but the first "n" matched characters back to the input stream. */
#define yyless(n) \
  do \
    { \
    /* Undo effects of setting up yytext. */ \
        int yyless_macro_arg = (n); \
        YY_LESS_LINENO(yyless_macro_arg);\
    *yy_cp = yyg->yy_hold_char; \
    YY_RESTORE_YY_MORE_OFFSET \
    yyg->yy_c_buf_p = yy_cp = yy_bp + yyless_macro_arg - YY_MORE_ADJ; \
    YY_DO_BEFORE_ACTION; /* set up yytext again */ \
    } \
  while ( 0 )
#define unput(c) yyunput( c, yyg->yytext_ptr , yyscanner )

#ifndef YY_STRUCT_YY_BUFFER_STATE
#define YY_STRUCT_YY_BUFFER_STATE
struct yy_buffer_state
  {
  FILE *yy_input_file;

  char *yy_ch_buf;    /* input buffer */
  char *yy_buf_pos;   /* current position in input buffer */

  /* Size of input buffer in bytes, not including room for EOB
   * characters.
   */
  int yy_buf_size;

  /* Number of characters read into yy_ch_buf, not including EOB
   * characters.
   */
  int yy_n_chars;

  /* Whether we "own" the buffer - i.e., we know we created it,
   * and can realloc() it to grow it, and should free() it to
   * delete it.
   */
  int yy_is_our_buffer;

  /* Whether this is an "interactive" input source; if so, and
   * if we're using stdio for input, then we want to use getc()
   * instead of fread(), to make sure we stop fetching input after
   * each newline.
   */
  int yy_is_interactive;

  /* Whether we're considered to be at the beginning of a line.
   * If so, '^' rules will be active on the next match, otherwise
   * not.
   */
  int yy_at_bol;

    int yy_bs_lineno; /**< The line count. */
    int yy_bs_column; /**< The column count. */

  /* Whether to try to fill the input buffer when we reach the
   * end of it.
   */
  int yy_fill_buffer;

  int yy_buffer_status;

#define YY_BUFFER_NEW 0
#define YY_BUFFER_NORMAL 1
  /* When an EOF's been seen but there's still some text to process
   * then we mark the buffer as YY_EOF_PENDING, to indicate that we
   * shouldn't try reading from the input source any more.  We might
   * still have a bunch of tokens to match, though, because of
   * possible backing-up.
   *
   * When we actually see the EOF, we change the status to "new"
   * (via slash_yyrestart()), so that the user can continue scanning by
   * just pointing yyin at a new input file.
   */
#define YY_BUFFER_EOF_PENDING 2

  };
#endif /* !YY_STRUCT_YY_BUFFER_STATE */

/* We provide macros for accessing buffer states in case in the
 * future we want to put the buffer states in a more general
 * "scanner state".
 *
 * Returns the top of the stack, or NULL.
 */
#define YY_CURRENT_BUFFER ( yyg->yy_buffer_stack \
                          ? yyg->yy_buffer_stack[yyg->yy_buffer_stack_top] \
                          : NULL)
/* Same as previous macro, but useful when we know that the buffer stack is not
 * NULL or when we need an lvalue. For internal use only.
 */
#define YY_CURRENT_BUFFER_LVALUE yyg->yy_buffer_stack[yyg->yy_buffer_stack_top]

void slash_yyrestart ( FILE *input_file , yyscan_t yyscanner );
void slash_yy_switch_to_buffer ( YY_BUFFER_STATE new_buffer , yyscan_t yyscanner );
YY_BUFFER_STATE slash_yy_create_buffer ( FILE *file, int size , yyscan_t yyscanner );
void slash_yy_delete_buffer ( YY_BUFFER_STATE b , yyscan_t yyscanner );
void slash_yy_flush_buffer ( YY_BUFFER_STATE b , yyscan_t yyscanner );
void slash_yypush_buffer_state ( YY_BUFFER_STATE new_buffer , yyscan_t yyscanner );
void slash_yypop_buffer_state ( yyscan_t yyscanner );

static void slash_yyensure_buffer_stack ( yyscan_t yyscanner );
static void slash_yy_load_buffer_state ( yyscan_t yyscanner );
static void slash_yy_init_buffer ( YY_BUFFER_STATE b, FILE *file , yyscan_t yyscanner );
#define YY_FLUSH_BUFFER slash_yy_flush_buffer(YY_CURRENT_BUFFER ,yyscanner)

YY_BUFFER_STATE slash_yy_scan_buffer ( char *base, yy_size_t size , yyscan_t yyscanner );
YY_BUFFER_STATE slash_yy_scan_string ( const char *yy_str , yyscan_t yyscanner );
YY_BUFFER_STATE slash_yy_scan_bytes ( const char *bytes, int len , yyscan_t yyscanner );

void *slash_yyalloc ( yy_size_t , yyscan_t yyscanner );
void *slash_yyrealloc ( void *, yy_size_t , yyscan_t yyscanner );
void slash_yyfree ( void * , yyscan_t yyscanner );

#define yy_new_buffer slash_yy_create_buffer
#define yy_set_interactive(is_interactive) \
  { \
  if ( ! YY_CURRENT_BUFFER ){ \
        slash_yyensure_buffer_stack (yyscanner); \
    YY_CURRENT_BUFFER_LVALUE =    \
            slash_yy_create_buffer(yyin,YY_BUF_SIZE ,yyscanner); \
  } \
  YY_CURRENT_BUFFER_LVALUE->yy_is_interactive = is_interactive; \
  }
#define yy_set_bol(at_bol) \
  { \
  if ( ! YY_CURRENT_BUFFER ){\
        slash_yyensure_buffer_stack (yyscanner); \
    YY_CURRENT_BUFFER_LVALUE =    \
            slash_yy_create_buffer(yyin,YY_BUF_SIZE ,yyscanner); \
  } \
  YY_CURRENT_BUFFER_LVALUE->yy_at_bol = at_bol; \
  }
#define YY_AT_BOL() (YY_CURRENT_BUFFER_LVALUE->yy_at_bol)

/* Begin user sect3 */

#define slash_yywrap(yyscanner) (/*CONSTCOND*/1)
#define YY_SKIP_YYWRAP
typedef flex_uint8_t YY_CHAR;

typedef int yy_state_type;

#define yytext_ptr yytext_r

static const flex_int16_t yy_nxt[][22] =
    {
    {
        0,    0,    0,    0,    0,    0,    0,    0,    0,    0,
        0,    0,    0,    0,    0,    0,    0,    0,    0,    0,
        0,    0
    },

    {
       19,   20,   20,   20,   20,   20,   20,   20,   20,   20,
       20,   20,   20,   20,   20,   20,   20,   20,   20,   20,
       20,   20
    },

    {
       19,   20,   20,   20,   20,   20,   20,   20,   20,   20,
       20,   20,   20,   20,   20,   20,   20,   20,   20,   20,
       20,   20
    },

    {
       19,   21,   22,   23,   21,   21,   21,   21,   21,   21,

       21,   22,   21,   21,   21,   21,   21,   21,   21,   21,
       21,   21
    },

    {
       19,   21,   22,   23,   21,   21,   21,   21,   21,   21,
       21,   22,   21,   21,   21,   21,   21,   21,   21,   21,
       21,   21
    },

    {
       19,   24,   25,   26,   24,   24,   24,   24,   24,   24,
       24,   24,   24,   24,   24,   24,   24,   24,   24,   24,
       27,   24
    },

    {
       19,   24,   25,   26,   24,   24,   24,   24,   24,   24,
       24,   24,   24,   24,   24,   24,   24,   24,   24,   24,

       27,   24
    },

    {
       19,   28,   29,   30,   31,   32,   28,   28,   33,   28,
       28,   29,   34,   28,   28,   28,   28,   28,   28,   28,
       28,   28
    },

    {
       19,   28,   29,   30,   31,   32,   28,   28,   33,   28,
       28,   29,   34,   28,   28,   28,   28,   28,   28,   28,
       28,   28
    },

    {
       19,   35,   35,   35,   35,   36,   35,   35,   35,   35,
       35,   37,   35,   35,   35,   35,   35,   35,   35,   35,
       35,   35

    },

    {
       19,   35,   35,   35,   35,   36,   35,   35,   35,   35,
       35,   37,   35,   35,   35,   35,   35,   35,   35,   35,
       35,   35
    },

    {
       19,   38,   38,   38,   38,   38,   38,   38,   39,   38,
       38,   38,   40,   38,   38,   38,   38,   38,   38,   38,
       38,   38
    },

    {
       19,   38,   38,   38,   38,   38,   38,   38,   39,   38,
       38,   38,   40,   38,   38,   38,   38,   38,   38,   38,
       38,   38
    },

    {
       19,   41,   41,   41,   42,   41,   41,   41,   41,   41,

       41,   41,   41,   41,   41,   41,   41,   41,   41,   41,
       41,   41
    },

    {
       19,   41,   41,   41,   42,   41,   41,   41,   41,   41,
       41,   41,   41,   41,   41,   41,   41,   41,   41,   41,
       41,   41
    },

    {
       19,   43,   44,   45,   43,   43,   43,   43,   43,   43,
       43,   43,   43,   43,   43,   43,   43,   43,   43,   43,
       43,   43
    },

    {
       19,   43,   44,   45,   43,   43,   43,   43,   43,   43,
       43,   43,   43,   43,   43,   43,   43,   43,   43,   43,

       43,   43
    },

    {
       19,   46,   46,   46,   46,   46,   46,   46,   46,   46,
       46,   47,   46,   46,   46,   46,   46,   46,   46,   46,
       46,   46
    },

    {
       19,   46,   46,   46,   46,   46,   46,   46,   46,   46,
       46,   47,   46,   46,   46,   46,   46,   46,   46,   46,
       46,   46
    },

    {
      -19,  -19,  -19,  -19,  -19,  -19,  -19,  -19,  -19,  -19,
      -19,  -19,  -19,  -19,  -19,  -19,  -19,  -19,  -19,  -19,
      -19,  -19

    },

    {
       19,  -20,  -20,  -20,  -20,  -20,  -20,  -20,  -20,  -20,
      -20,  -20,  -20,  -20,  -20,  -20,  -20,  -20,  -20,  -20,
      -20,  -20
    },

    {
       19,  -21,  -21,  -21,  -21,  -21,  -21,  -21,  -21,  -21,
      -21,  -21,  -21,  -21,  -21,  -21,  -21,  -21,  -21,  -21,
      -21,  -21
    },

    {
       19,  -22,  -22,  -22,  -22,  -22,  -22,  -22,  -22,  -22,
      -22,  -22,  -22,  -22,  -22,  -22,  -22,  -22,  -22,  -22,
      -22,  -22
    },

    {
       19,  -23,  -23,  -23,  -23,  -23,  -23,  -23,  -23,  -23,

      -23,  -23,  -23,  -23,  -23,  -23,  -23,  -23,  -23,  -23,
      -23,  -23
    },

    {
       19,  -24,  -24,  -24,  -24,  -24,  -24,  -24,  -24,  -24,
      -24,  -24,  -24,  -24,  -24,  -24,  -24,  -24,  -24,  -24,
      -24,  -24
    },

    {
       19,  -25,   48,   48,  -25,  -25,  -25,  -25,  -25,  -25,
      -25,  -25,  -25,  -25,  -25,  -25,  -25,  -25,  -25,  -25,
      -25,  -25
    },

    {
       19,  -26,   48,   48,  -26,  -26,  -26,  -26,  -26,  -26,
      -26,  -26,  -26,  -26,  -26,  -26,  -26,  -26,  -26,  -26,

      -26,  -26
    },

    {
       19,  -27,  -27,  -27,  -27,  -27,  -27,  -27,  -27,  -27,
      -27,  -27,  -27,  -27,  -27,  -27,  -27,  -27,  -27,  -27,
      -27,  -27
    },

    {
       19,  -28,  -28,  -28,  -28,  -28,  -28,  -28,  -28,  -28,
      -28,  -28,  -28,  -28,  -28,  -28,  -28,  -28,  -28,  -28,
      -28,  -28
    },

    {
       19,  -29,  -29,  -29,  -29,  -29,  -29,  -29,  -29,  -29,
      -29,  -29,  -29,  -29,  -29,  -29,  -29,  -29,  -29,  -29,
      -29,  -29

    },

    {
       19,  -30,  -30,  -30,  -30,  -30,  -30,  -30,  -30,  -30,
      -30,  -30,  -30,  -30,  -30,  -30,  -30,  -30,  -30,  -30,
      -30,  -30
    },

    {
       19,  -31,  -31,  -31,  -31,  -31,  -31,  -31,  -31,  -31,
      -31,  -31,  -31,  -31,  -31,  -31,  -31,  -31,  -31,  -31,
      -31,  -31
    },

    {
       19,  -32,  -32,  -32,  -32,  -32,  -32,  -32,  -32,  -32,
      -32,  -32,  -32,  -32,  -32,  -32,  -32,  -32,  -32,  -32,
      -32,  -32
    },

    {
       19,  -33,  -33,  -33,   49,   50,   51,   51,  -33,  -33,

       51,  -33,  -33,   51,   51,   51,   51,   51,   51,   52,
      -33,  -33
    },

    {
       19,  -34,  -34,  -34,  -34,  -34,  -34,  -34,  -34,  -34,
      -34,  -34,  -34,  -34,  -34,  -34,  -34,  -34,  -34,  -34,
      -34,  -34
    },

    {
       19,  -35,  -35,  -35,  -35,  -35,  -35,  -35,  -35,  -35,
      -35,  -35,  -35,  -35,  -35,  -35,  -35,  -35,  -35,  -35,
      -35,  -35
    },

    {
       19,  -36,  -36,  -36,  -36,   53,  -36,  -36,  -36,  -36,
      -36,  -36,  -36,  -36,  -36,  -36,  -36,  -36,  -36,  -36,

      -36,  -36
    },

    {
       19,   54,   54,  -37,   54,   54,   55,   54,   54,   54,
       54,   54,   54,   56,   57,   58,   59,   60,   61,   54,
       54,   54
    },

    {
       19,  -38,  -38,  -38,  -38,  -38,  -38,  -38,  -38,  -38,
      -38,  -38,  -38,  -38,  -38,  -38,  -38,  -38,  -38,  -38,
      -38,  -38
    },

    {
       19,  -39,  -39,  -39,  -39,   62,   63,   63,  -39,  -39,
       63,  -39,  -39,   63,   63,   63,   63,   63,   63,  -39,
      -39,  -39

    },

    {
       19,  -40,  -40,  -40,  -40,  -40,  -40,  -40,  -40,  -40,
      -40,  -40,  -40,  -40,  -40,  -40,  -40,  -40,  -40,  -40,
      -40,  -40
    },

    {
       19,  -41,  -41,  -41,  -41,  -41,  -41,  -41,  -41,  -41,
      -41,  -41,  -41,  -41,  -41,  -41,  -41,  -41,  -41,  -41,
      -41,  -41
    },

    {
       19,  -42,  -42,  -42,  -42,  -42,  -42,  -42,  -42,  -42,
      -42,  -42,  -42,  -42,  -42,  -42,  -42,  -42,  -42,  -42,
      -42,  -42
    },

    {
       19,  -43,  -43,  -43,  -43,  -43,  -43,  -43,  -43,  -43,

      -43,  -43,  -43,  -43,  -43,  -43,  -43,  -43,  -43,  -43,
      -43,  -43
    },

    {
       19,  -44,   64,   64,  -44,  -44,  -44,  -44,  -44,  -44,
      -44,  -44,  -44,  -44,  -44,  -44,  -44,  -44,  -44,  -44,
      -44,  -44
    },

    {
       19,  -45,   64,   64,  -45,  -45,  -45,  -45,  -45,  -45,
      -45,  -45,  -45,  -45,  -45,  -45,  -45,  -45,  -45,  -45,
      -45,  -45
    },

    {
       19,  -46,  -46,  -46,  -46,  -46,  -46,  -46,  -46,  -46,
      -46,  -46,  -46,  -46,  -46,  -46,  -46,  -46,  -46,  -46,

      -46,  -46
    },

    {
       19,  -47,  -47,  -47,  -47,  -47,  -47,  -47,  -47,  -47,
      -47,   65,  -47,  -47,  -47,  -47,  -47,  -47,  -47,  -47,
      -47,  -47
    },

    {
       19,  -48,   48,   48,  -48,  -48,  -48,  -48,  -48,  -48,
      -48,  -48,  -48,  -48,  -48,  -48,  -48,  -48,  -48,  -48,
      -48,  -48
    },

    {
       19,  -49,  -49,  -49,  -49,  -49,   66,   66,  -49,  -49,
       66,  -49,  -49,   66,   66,   66,   66,   66,   66,  -49,
      -49,  -49

    },

    {
       19,  -50,  -50,  -50,  -50,  -50,   67,   67,  -50,  -50,
       67,  -50,  -50,   67,   67,   67,   67,   67,   67,  -50,
      -50,  -50
    },

    {
       19,  -51,  -51,  -51,  -51,  -51,   51,   51,  -51,  -51,
       51,  -51,  -51,   51,   51,   51,   51,   51,   51,  -51,
      -51,  -51
    },

    {
       19,  -52,  -52,  -52,  -52,  -52,  -52,  -52,  -52,   68,
      -52,  -52,  -52,  -52,  -52,  -52,  -52,  -52,  -52,  -52,
      -52,  -52
    },

    {
       19,  -53,  -53,  -53,  -53,  -53,  -53,  -53,  -53,  -53,

      -53,  -53,  -53,  -53,  -53,  -53,  -53,  -53,  -53,  -53,
      -53,  -53
    },

    {
       19,  -54,  -54,  -54,  -54,  -54,  -54,  -54,  -54,  -54,
      -54,  -54,  -54,  -54,  -54,  -54,  -54,  -54,  -54,  -54,
      -54,  -54
    },

    {
       19,  -55,  -55,  -55,  -55,  -55,   69,  -55,  -55,  -55,
      -55,  -55,  -55,  -55,  -55,  -55,  -55,  -55,  -55,  -55,
      -55,  -55
    },

    {
       19,  -56,  -56,  -56,  -56,  -56,  -56,  -56,  -56,  -56,
      -56,  -56,  -56,  -56,  -56,  -56,  -56,  -56,  -56,  -56,

      -56,  -56
    },

    {
       19,  -57,  -57,  -57,  -57,  -57,  -57,  -57,  -57,  -57,
      -57,  -57,  -57,  -57,  -57,  -57,  -57,  -57,  -57,  -57,
      -57,  -57
    },

    {
       19,  -58,  -58,  -58,  -58,  -58,  -58,  -58,  -58,  -58,
      -58,  -58,  -58,  -58,  -58,  -58,  -58,  -58,  -58,  -58,
      -58,  -58
    },

    {
       19,  -59,  -59,  -59,  -59,  -59,  -59,  -59,  -59,  -59,
      -59,  -59,  -59,  -59,  -59,  -59,  -59,  -59,  -59,  -59,
      -59,  -59

    },

    {
       19,  -60,  -60,  -60,  -60,  -60,  -60,  -60,  -60,  -60,
      -60,  -60,  -60,  -60,  -60,  -60,  -60,  -60,  -60,  -60,
      -60,  -60
    },

    {
       19,  -61,  -61,  -61,  -61,  -61,   70,   70,  -61,  -61,
      -61,  -61,  -61,   70,   70,  -61,  -61,  -61,  -61,  -61,
      -61,  -61
    },

    {
       19,  -62,  -62,  -62,  -62,  -62,   71,   71,  -62,  -62,
       71,  -62,  -62,   71,   71,   71,   71,   71,   71,  -62,
      -62,  -62
    },

    {
       19,  -63,  -63,  -63,  -63,  -63,   63,   63,  -63,  -63,

       63,  -63,  -63,   63,   63,   63,   63,   63,   63,  -63,
      -63,  -63
    },

    {
       19,  -64,   64,   64,  -64,  -64,  -64,  -64,  -64,  -64,
      -64,  -64,  -64,  -64,  -64,  -64,  -64,  -64,  -64,  -64,
      -64,  -64
    },

    {
       19,  -65,  -65,  -65,  -65,  -65,  -65,  -65,  -65,  -65,
      -65,  -65,  -65,  -65,  -65,  -65,  -65,  -65,  -65,  -65,
      -65,  -65
    },

    {
       19,  -66,  -66,  -66,   72,  -66,   66,   66,  -66,  -66,
       66,  -66,  -66,   66,   66,   66,   66,   66,   66,  -66,

      -66,  -66
    },

    {
       19,  -67,  -67,  -67,  -67,   73,   67,   67,  -67,  -67,
       67,  -67,  -67,   67,   67,   67,   67,   67,   67,  -67,
      -67,  -67
    },

    {
       19,  -68,  -68,  -68,  -68,  -68,   74,   74,  -68,  -68,
       74,  -68,  -68,   74,   74,   74,   74,   74,   74,  -68,
      -68,  -68
    },

    {
       19,  -69,  -69,  -69,  -69,  -69,   75,  -69,  -69,  -69,
      -69,  -69,  -69,  -69,  -69,  -69,  -69,  -69,  -69,  -69,
      -69,  -69

    },

    {
       19,  -70,  -70,  -70,  -70,  -70,   76,   76,  -70,  -70,
      -70,  -70,  -70,   76,   76,  -70,  -70,  -70,  -70,  -70,
      -70,  -70
    },

    {
       19,  -71,  -71,  -71,  -71,   77,   71,   71,  -71,  -71,
       71,  -71,  -71,   71,   71,   71,   71,   71,   71,  -71,
      -71,  -71
    },

    {
       19,  -72,  -72,  -72,  -72,  -72,  -72,  -72,  -72,  -72,
      -72,  -72,  -72,  -72,  -72,  -72,  -72,  -72,  -72,  -72,
      -72,  -72
    },

    {
       19,  -73,  -73,  -73,  -73,  -73,  -73,  -73,  -73,  -73,

      -73,  -73,  -73,  -73,  -73,  -73,  -73,  -73,  -73,  -73,
      -73,  -73
    },

    {
       19,  -74,  -74,  -74,  -74,  -74,   74,   74,  -74,  -74,
       74,  -74,  -74,   74,   74,   74,   74,   74,   74,  -74,
      -74,   78
    },

    {
       19,  -75,  -75,  -75,  -75,  -75,  -75,  -75,  -75,  -75,
      -75,  -75,  -75,  -75,  -75,  -75,  -75,  -75,  -75,  -75,
      -75,  -75
    },

    {
       19,  -76,  -76,  -76,  -76,  -76,  -76,  -76,  -76,  -76,
      -76,  -76,  -76,  -76,  -76,  -76,  -76,  -76,  -76,  -76,

      -76,  -76
    },

    {
       19,  -77,  -77,  -77,  -77,  -77,  -77,  -77,  -77,  -77,
      -77,  -77,  -77,  -77,  -77,  -77,  -77,  -77,  -77,  -77,
      -77,  -77
    },

    {
       19,  -78,  -78,  -78,  -78,  -78,  -78,  -78,  -78,  -78,
      -78,  -78,  -78,  -78,  -78,  -78,  -78,  -78,  -78,  -78,
      -78,  -78
    },

    } ;

static yy_state_type yy_get_previous_state ( yyscan_t yyscanner );
static yy_state_type yy_try_NUL_trans ( yy_state_type current_state  , yyscan_t yyscanner);
static int yy_get_next_buffer ( yyscan_t yyscanner );
static void yynoreturn yy_fatal_error ( const char* msg , yyscan_t yyscanner );

/* Done after the current pattern has been matched and before the
 * corresponding action - sets up yytext.
 */
#define YY_DO_BEFORE_ACTION \
  yyg->yytext_ptr = yy_bp; \
  yyleng = (int) (yy_cp - yy_bp); \
  yyg->yy_hold_char = *yy_cp; \
  *yy_cp = '\0'; \
  yyg->yy_c_buf_p = yy_cp;
#define YY_NUM_RULES 42
#define YY_END_OF_BUFFER 43
/* This struct is not used in this scanner,
   but its presence is necessary. */
struct yy_trans_info
  {
  flex_int32_t yy_verify;
  flex_int32_t yy_nxt;
  };
static const flex_int16_t yy_accept[79] =
    {   0,
        0,    0,    0,    0,    0,    0,    0,    0,    0,    0,
        0,    0,    0,    0,    0,    0,    0,    0,   43,    1,
        3,    2,    2,    6,    4,    4,    5,   19,    7,    7,
       10,    8,   19,    9,   30,   20,   30,   35,   35,   31,
       37,   36,   39,   38,   38,   41,   41,    4,   16,   15,
       11,   18,   21,   29,   27,   24,   26,   22,   25,   23,
       29,   34,   32,   38,   40,   16,   15,   17,   27,   28,
       34,   13,   12,   17,   27,   28,   33,   14
    } ;

static const YY_CHAR yy_ec[256] =
    {   0,
        1,    1,    1,    1,    1,    1,    1,    1,    2,    3,
        1,    2,    2,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    2,    1,    4,    1,    1,    1,    1,    5,    1,
        1,    1,    1,    1,    1,    1,    1,    6,    6,    6,
        6,    6,    6,    6,    6,    7,    7,    8,    1,    1,
        1,    1,    9,    1,    7,    7,    7,    7,    7,    7,
       10,   10,   10,   10,   10,   10,   10,   10,   10,   10,
       10,   10,   10,   10,   10,   10,   10,   10,   10,   10,
        1,   11,    1,    1,   10,   12,    7,   13,    7,    7,

        7,   14,   10,   10,   10,   10,   10,   10,   10,   15,
       10,   10,   10,   16,   10,   17,   10,   10,   10,   18,
       10,   10,   19,   20,   21,    1,    1,   10,   10,   10,
       10,   10,   10,   10,   10,   10,   10,   10,   10,   10,
       10,   10,   10,   10,   10,   10,   10,   10,   10,   10,
       10,   10,   10,   10,   10,   10,   10,   10,   10,   10,
       10,   10,   10,   10,   10,   10,   10,   10,   10,   10,
       10,   10,   10,   10,   10,   10,   10,   10,   10,   10,
       10,   10,   10,   10,   10,   10,   10,   10,   10,   10,
       10,   10,   10,   10,   10,   10,   10,   10,   10,   10,

       10,   10,   10,   10,   10,   10,   10,   10,   10,   10,
       10,   10,   10,   10,   10,   10,   10,   10,   10,   10,
       10,   10,   10,   10,   10,   10,   10,   10,   10,   10,
       10,   10,   10,   10,   10,   10,   10,   10,   10,   10,
       10,   10,   10,   10,   10,   10,   10,   10,   10,   10,
       10,   10,   10,   10,   10
    } ;

/* The intent behind this definition is that it'll catch
 * any uses of REJECT which flex missed.
 */
#define REJECT reject_used_but_not_detected
#define yymore() yymore_used_but_not_detected
#define YY_MORE_ADJ 0
#define YY_RESTORE_YY_MORE_OFFSET
#line 1 "psqlscanslash.l"

#line 28 "psqlscanslash.l"
#include "fe_utils/psqlscan_int.h"

#define PQmblenBounded(s, e)  strnlen(s, PQmblen(s, e))

/*
 * We must have a typedef YYSTYPE for yylex's first argument, but this lexer
 * doesn't presently make use of that argument, so just declare it as int.
 */
typedef int YYSTYPE;

/*
 * Set the type of yyextra; we use it as a pointer back to the containing
 * PsqlScanState.
 */
#define YY_EXTRA_TYPE PsqlScanState

/*
 * These variables do not need to be saved across calls.  Yeah, it's a bit
 * of a hack, but putting them into PsqlScanStateData would be klugy too.
 */
static enum slash_option_type option_type;
static char *option_quote;
static int  unquoted_option_chars;
static int  backtick_start_offset;


/* Return values from yylex() */
#define LEXRES_EOL      0  /* end of input */
#define LEXRES_OK     1  /* OK completion of backslash argument */


static void evaluate_backtick(PsqlScanState state);

#define ECHO psqlscan_emit(cur_state, yytext, yyleng)

/*
 * Work around a bug in flex 2.5.35: it emits a couple of functions that
 * it forgets to emit declarations for.  Since we use -Wmissing-prototypes,
 * this would cause warnings.  Providing our own declarations should be
 * harmless even when the bug gets fixed.
 */
extern int  slash_yyget_column(yyscan_t yyscanner);
extern void slash_yyset_column(int column_no, yyscan_t yyscanner);

/* LCOV_EXCL_START */

#line 1043 "psqlscanslash.c"
/* Except for the prefix, these options should match psqlscan.l */
#define YY_NO_INPUT 1
/*
 * OK, here is a short description of lex/flex rules behavior.
 * The longest pattern which matches an input string is always chosen.
 * For equal-length patterns, the first occurring in the rules list is chosen.
 * INITIAL is the starting state, to which all non-conditional rules apply.
 * Exclusive states change parsing rules while the state is active.  When in
 * an exclusive state, only those rules defined for that state apply.
 */
/* Exclusive states for lexing backslash commands */

/*
 * Assorted character class definitions that should match psqlscan.l.
 */
#line 1059 "psqlscanslash.c"

#define INITIAL 0
#define xslashcmd 1
#define xslashargstart 2
#define xslasharg 3
#define xslashquote 4
#define xslashbackquote 5
#define xslashdquote 6
#define xslashwholeline 7
#define xslashend 8

#ifndef YY_NO_UNISTD_H
/* Special case for "unistd.h", since it is non-ANSI. We include it way
 * down here because we want the user's section 1 to have been scanned first.
 * The user has a chance to override it with an option.
 */
#include <unistd.h>
#endif

#ifndef YY_EXTRA_TYPE
#define YY_EXTRA_TYPE void *
#endif

/* Holds the entire state of the reentrant scanner. */
struct yyguts_t
    {

    /* User-defined. Not touched by flex. */
    YY_EXTRA_TYPE yyextra_r;

    /* The rest are the same as the globals declared in the non-reentrant scanner. */
    FILE *yyin_r, *yyout_r;
    size_t yy_buffer_stack_top; /**< index of top of stack. */
    size_t yy_buffer_stack_max; /**< capacity of stack. */
    YY_BUFFER_STATE * yy_buffer_stack; /**< Stack as an array. */
    char yy_hold_char;
    int yy_n_chars;
    int yyleng_r;
    char *yy_c_buf_p;
    int yy_init;
    int yy_start;
    int yy_did_buffer_switch_on_eof;
    int yy_start_stack_ptr;
    int yy_start_stack_depth;
    int *yy_start_stack;
    yy_state_type yy_last_accepting_state;
    char* yy_last_accepting_cpos;

    int yylineno_r;
    int yy_flex_debug_r;

    char *yytext_r;
    int yy_more_flag;
    int yy_more_len;

    YYSTYPE * yylval_r;

    }; /* end struct yyguts_t */

static int yy_init_globals ( yyscan_t yyscanner );

    /* This must go here because YYSTYPE and YYLTYPE are included
     * from bison output in section 1.*/
    #    define yylval yyg->yylval_r
    
int slash_yylex_init (yyscan_t* scanner);

int slash_yylex_init_extra ( YY_EXTRA_TYPE user_defined, yyscan_t* scanner);

/* Accessor methods to globals.
   These are made visible to non-reentrant scanners for convenience. */

int slash_yylex_destroy ( yyscan_t yyscanner );

int slash_yyget_debug ( yyscan_t yyscanner );

void slash_yyset_debug ( int debug_flag , yyscan_t yyscanner );

YY_EXTRA_TYPE slash_yyget_extra ( yyscan_t yyscanner );

void slash_yyset_extra ( YY_EXTRA_TYPE user_defined , yyscan_t yyscanner );

FILE *slash_yyget_in ( yyscan_t yyscanner );

void slash_yyset_in  ( FILE * _in_str , yyscan_t yyscanner );

FILE *slash_yyget_out ( yyscan_t yyscanner );

void slash_yyset_out  ( FILE * _out_str , yyscan_t yyscanner );

      int slash_yyget_leng ( yyscan_t yyscanner );

char *slash_yyget_text ( yyscan_t yyscanner );

int slash_yyget_lineno ( yyscan_t yyscanner );

void slash_yyset_lineno ( int _line_number , yyscan_t yyscanner );

int slash_yyget_column  ( yyscan_t yyscanner );

void slash_yyset_column ( int _column_no , yyscan_t yyscanner );

YYSTYPE * slash_yyget_lval ( yyscan_t yyscanner );

void slash_yyset_lval ( YYSTYPE * yylval_param , yyscan_t yyscanner );

/* Macros after this point can all be overridden by user definitions in
 * section 1.
 */

#ifndef YY_SKIP_YYWRAP
#ifdef __cplusplus
extern "C" int slash_yywrap ( yyscan_t yyscanner );
#else
extern int slash_yywrap ( yyscan_t yyscanner );
#endif
#endif

#ifndef YY_NO_UNPUT
    
#endif

#ifndef yytext_ptr
static void yy_flex_strncpy ( char *, const char *, int , yyscan_t yyscanner);
#endif

#ifdef YY_NEED_STRLEN
static int yy_flex_strlen ( const char * , yyscan_t yyscanner);
#endif

#ifndef YY_NO_INPUT
#ifdef __cplusplus
static int yyinput ( yyscan_t yyscanner );
#else
static int input ( yyscan_t yyscanner );
#endif

#endif

/* Amount of stuff to slurp up with each read. */
#ifndef YY_READ_BUF_SIZE
#ifdef __ia64__
/* On IA-64, the buffer size is 16k, not 8k */
#define YY_READ_BUF_SIZE 16384
#else
#define YY_READ_BUF_SIZE 8192
#endif /* __ia64__ */
#endif

/* Copy whatever the last rule matched to the standard output. */
#ifndef ECHO
/* This used to be an fputs(), but since the string might contain NUL's,
 * we now use fwrite().
 */
#define ECHO do { if (fwrite( yytext, (size_t) yyleng, 1, yyout )) {} } while (0)
#endif

/* Gets input and stuffs it into "buf".  number of characters read, or YY_NULL,
 * is returned in "result".
 */
#ifndef YY_INPUT
#define YY_INPUT(buf,result,max_size) \
  if ( YY_CURRENT_BUFFER_LVALUE->yy_is_interactive ) \
    { \
    int c = '*'; \
    int n; \
    for ( n = 0; n < max_size && \
           (c = getc( yyin )) != EOF && c != '\n'; ++n ) \
      buf[n] = (char) c; \
    if ( c == '\n' ) \
      buf[n++] = (char) c; \
    if ( c == EOF && ferror( yyin ) ) \
      YY_FATAL_ERROR( "input in flex scanner failed" ); \
    result = n; \
    } \
  else \
    { \
    errno=0; \
    while ( (result = (int) fread(buf, 1, (yy_size_t) max_size, yyin)) == 0 && ferror(yyin)) \
      { \
      if( errno != EINTR) \
        { \
        YY_FATAL_ERROR( "input in flex scanner failed" ); \
        break; \
        } \
      errno=0; \
      clearerr(yyin); \
      } \
    }\
\

#endif

/* No semi-colon after return; correct usage is to write "yyterminate();" -
 * we don't want an extra ';' after the "return" because that will cause
 * some compilers to complain about unreachable statements.
 */
#ifndef yyterminate
#define yyterminate() return YY_NULL
#endif

/* Number of entries by which start-condition stack grows. */
#ifndef YY_START_STACK_INCR
#define YY_START_STACK_INCR 25
#endif

/* Report a fatal error. */
#ifndef YY_FATAL_ERROR
#define YY_FATAL_ERROR(msg) yy_fatal_error( msg , yyscanner)
#endif

/* end tables serialization structures and prototypes */

/* Default declaration of generated scanner - a define so the user can
 * easily add parameters.
 */
#ifndef YY_DECL
#define YY_DECL_IS_OURS 1

extern int slash_yylex \
               (YYSTYPE * yylval_param , yyscan_t yyscanner);

#define YY_DECL int slash_yylex \
               (YYSTYPE * yylval_param , yyscan_t yyscanner)
#endif /* !YY_DECL */

/* Code executed at the beginning of each rule, after yytext and yyleng
 * have been set up.
 */
#ifndef YY_USER_ACTION
#define YY_USER_ACTION
#endif

/* Code executed at the end of each rule. */
#ifndef YY_BREAK
#define YY_BREAK /*LINTED*/break;
#endif

#define YY_RULE_SETUP \
  YY_USER_ACTION

/** The main scanner function which does all the work.
 */
YY_DECL
{
  yy_state_type yy_current_state;
  char *yy_cp, *yy_bp;
  int yy_act;
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;

    yylval = yylval_param;

  if ( !yyg->yy_init )
    {
    yyg->yy_init = 1;

#ifdef YY_USER_INIT
    YY_USER_INIT;
#endif

    if ( ! yyg->yy_start )
      yyg->yy_start = 1; /* first start state */

    if ( ! yyin )
      yyin = stdin;

    if ( ! yyout )
      yyout = stdout;

    if ( ! YY_CURRENT_BUFFER ) {
      slash_yyensure_buffer_stack (yyscanner);
      YY_CURRENT_BUFFER_LVALUE =
        slash_yy_create_buffer(yyin,YY_BUF_SIZE ,yyscanner);
    }

    slash_yy_load_buffer_state(yyscanner );
    }

  {
#line 120 "psqlscanslash.l"



#line 124 "psqlscanslash.l"
    /* Declare some local variables inside yylex(), for convenience */
    PsqlScanState cur_state = yyextra;
    PQExpBuffer output_buf = cur_state->output_buf;

    /*
     * Force flex into the state indicated by start_state.  This has a
     * couple of purposes: it lets some of the functions below set a new
     * starting state without ugly direct access to flex variables, and it
     * allows us to transition from one flex lexer to another so that we
     * can lex different parts of the source string using separate lexers.
     */
    BEGIN(cur_state->start_state);


  /*
   * We don't really expect to be invoked in the INITIAL state in this
   * lexer; but if we are, just spit data to the output_buf until EOF.
   */

#line 1363 "psqlscanslash.c"

  while ( /*CONSTCOND*/1 )    /* loops until end-of-file is reached */
    {
    yy_cp = yyg->yy_c_buf_p;

    /* Support of yytext. */
    *yy_cp = yyg->yy_hold_char;

    /* yy_bp points to the position in yy_ch_buf of the start of
     * the current run.
     */
    yy_bp = yy_cp;

    yy_current_state = yyg->yy_start;
yy_match:
    while ( (yy_current_state = yy_nxt[yy_current_state][ yy_ec[YY_SC_TO_UI(*yy_cp)]  ]) > 0 )
      ++yy_cp;

    yy_current_state = -yy_current_state;

yy_find_action:
    yy_act = yy_accept[yy_current_state];

    YY_DO_BEFORE_ACTION;

do_action:  /* This label is used only to access EOF actions. */

    switch ( yy_act )
  { /* beginning of action switch */
case 1:
/* rule 1 can match eol */
YY_RULE_SETUP
#line 143 "psqlscanslash.l"
{ ECHO; }
  YY_BREAK
/*
   * Exclusive lexer states to handle backslash command lexing
   */

/* command name ends at whitespace or backslash; eat all else */
case 2:
/* rule 2 can match eol */
YY_RULE_SETUP
#line 152 "psqlscanslash.l"
{
          yyless(0);
          cur_state->start_state = YY_START;
          return LEXRES_OK;
        }
  YY_BREAK
case 3:
YY_RULE_SETUP
#line 158 "psqlscanslash.l"
{ ECHO; }
  YY_BREAK


/*
   * Discard any whitespace before argument, then go to xslasharg state.
   * An exception is that "|" is only special at start of argument, so we
   * check for it here.
   */
case 4:
/* rule 4 can match eol */
YY_RULE_SETUP
#line 169 "psqlscanslash.l"
{ }
  YY_BREAK
case 5:
YY_RULE_SETUP
#line 171 "psqlscanslash.l"
{
          if (option_type == OT_FILEPIPE)
          {
            /* treat like whole-string case */
            ECHO;
            BEGIN(xslashwholeline);
          }
          else
          {
            /* vertical bar is not special otherwise */
            yyless(0);
            BEGIN(xslasharg);
          }
        }
  YY_BREAK
case 6:
YY_RULE_SETUP
#line 186 "psqlscanslash.l"
{
          yyless(0);
          BEGIN(xslasharg);
        }
  YY_BREAK


/*
   * Default processing of text in a slash command's argument.
   *
   * Note: unquoted_option_chars counts the number of characters at the
   * end of the argument that were not subject to any form of quoting.
   * psql_scan_slash_option needs this to strip trailing semicolons safely.
   */
case 7:
/* rule 7 can match eol */
YY_RULE_SETUP
#line 202 "psqlscanslash.l"
{
          /*
           * Unquoted space is end of arg; do not eat.  Likewise
           * backslash is end of command or next command, do not eat
           *
           * XXX this means we can't conveniently accept options
           * that include unquoted backslashes; therefore, option
           * processing that encourages use of backslashes is rather
           * broken.
           */
          yyless(0);
          cur_state->start_state = YY_START;
          return LEXRES_OK;
        }
  YY_BREAK
case 8:
YY_RULE_SETUP
#line 217 "psqlscanslash.l"
{
          *option_quote = '\'';
          unquoted_option_chars = 0;
          BEGIN(xslashquote);
        }
  YY_BREAK
case 9:
YY_RULE_SETUP
#line 223 "psqlscanslash.l"
{
          backtick_start_offset = output_buf->len;
          *option_quote = '`';
          unquoted_option_chars = 0;
          BEGIN(xslashbackquote);
        }
  YY_BREAK
case 10:
YY_RULE_SETUP
#line 230 "psqlscanslash.l"
{
          ECHO;
          *option_quote = '"';
          unquoted_option_chars = 0;
          BEGIN(xslashdquote);
        }
  YY_BREAK
case 11:
YY_RULE_SETUP
#line 237 "psqlscanslash.l"
{
          /* Possible psql variable substitution */
          if (cur_state->callbacks->get_variable == NULL)
            ECHO;
          else
          {
            char     *varname;
            char     *value;

            varname = psqlscan_extract_substring(cur_state,
                               yytext + 1,
                               yyleng - 1);
            value = cur_state->callbacks->get_variable(varname,
                                   PQUOTE_PLAIN,
                                   cur_state->cb_passthrough);
            free(varname);

            /*
             * The variable value is just emitted without any
             * further examination.  This is consistent with the
             * pre-8.0 code behavior, if not with the way that
             * variables are handled outside backslash commands.
             * Note that we needn't guard against recursion here.
             */
            if (value)
            {
              appendPQExpBufferStr(output_buf, value);
              free(value);
            }
            else
              ECHO;

            *option_quote = ':';
          }
          unquoted_option_chars = 0;
        }
  YY_BREAK
case 12:
YY_RULE_SETUP
#line 274 "psqlscanslash.l"
{
          psqlscan_escape_variable(cur_state, yytext, yyleng,
                       PQUOTE_SQL_LITERAL);
          *option_quote = ':';
          unquoted_option_chars = 0;
        }
  YY_BREAK
case 13:
YY_RULE_SETUP
#line 282 "psqlscanslash.l"
{
          psqlscan_escape_variable(cur_state, yytext, yyleng,
                       PQUOTE_SQL_IDENT);
          *option_quote = ':';
          unquoted_option_chars = 0;
        }
  YY_BREAK
case 14:
YY_RULE_SETUP
#line 289 "psqlscanslash.l"
{
          psqlscan_test_variable(cur_state, yytext, yyleng);
        }
  YY_BREAK
case 15:
YY_RULE_SETUP
#line 293 "psqlscanslash.l"
{
          /* Throw back everything but the colon */
          yyless(1);
          unquoted_option_chars++;
          ECHO;
        }
  YY_BREAK
case 16:
YY_RULE_SETUP
#line 300 "psqlscanslash.l"
{
          /* Throw back everything but the colon */
          yyless(1);
          unquoted_option_chars++;
          ECHO;
        }
  YY_BREAK
case 17:
YY_RULE_SETUP
#line 307 "psqlscanslash.l"
{
          /* Throw back everything but the colon */
          yyless(1);
          unquoted_option_chars++;
          ECHO;
        }
  YY_BREAK
case 18:
YY_RULE_SETUP
#line 314 "psqlscanslash.l"
{
          /* Throw back everything but the colon */
          yyless(1);
          unquoted_option_chars++;
          ECHO;
        }
  YY_BREAK
case 19:
YY_RULE_SETUP
#line 321 "psqlscanslash.l"
{
          unquoted_option_chars++;
          ECHO;
        }
  YY_BREAK


/*
   * single-quoted text: copy literally except for '' and backslash
   * sequences
   */
case 20:
YY_RULE_SETUP
#line 334 "psqlscanslash.l"
{ BEGIN(xslasharg); }
  YY_BREAK
case 21:
YY_RULE_SETUP
#line 336 "psqlscanslash.l"
{ appendPQExpBufferChar(output_buf, '\''); }
  YY_BREAK
case 22:
YY_RULE_SETUP
#line 338 "psqlscanslash.l"
{ appendPQExpBufferChar(output_buf, '\n'); }
  YY_BREAK
case 23:
YY_RULE_SETUP
#line 339 "psqlscanslash.l"
{ appendPQExpBufferChar(output_buf, '\t'); }
  YY_BREAK
case 24:
YY_RULE_SETUP
#line 340 "psqlscanslash.l"
{ appendPQExpBufferChar(output_buf, '\b'); }
  YY_BREAK
case 25:
YY_RULE_SETUP
#line 341 "psqlscanslash.l"
{ appendPQExpBufferChar(output_buf, '\r'); }
  YY_BREAK
case 26:
YY_RULE_SETUP
#line 342 "psqlscanslash.l"
{ appendPQExpBufferChar(output_buf, '\f'); }
  YY_BREAK
case 27:
YY_RULE_SETUP
#line 344 "psqlscanslash.l"
{
          /* octal case */
          appendPQExpBufferChar(output_buf,
                      (char) strtol(yytext + 1, NULL, 8));
        }
  YY_BREAK
case 28:
YY_RULE_SETUP
#line 350 "psqlscanslash.l"
{
          /* hex case */
          appendPQExpBufferChar(output_buf,
                      (char) strtol(yytext + 2, NULL, 16));
        }
  YY_BREAK
case 29:
YY_RULE_SETUP
#line 356 "psqlscanslash.l"
{ psqlscan_emit(cur_state, yytext + 1, 1); }
  YY_BREAK
case 30:
/* rule 30 can match eol */
YY_RULE_SETUP
#line 358 "psqlscanslash.l"
{ ECHO; }
  YY_BREAK


/*
   * backticked text: copy everything until next backquote (expanding
   * variable references, but doing nought else), then evaluate.
   */
case 31:
YY_RULE_SETUP
#line 368 "psqlscanslash.l"
{
          /* In an inactive \if branch, don't evaluate the command */
          if (cur_state->cb_passthrough == NULL ||
            conditional_active((ConditionalStack) cur_state->cb_passthrough))
            evaluate_backtick(cur_state);
          BEGIN(xslasharg);
        }
  YY_BREAK
case 32:
YY_RULE_SETUP
#line 376 "psqlscanslash.l"
{
          /* Possible psql variable substitution */
          if (cur_state->callbacks->get_variable == NULL)
            ECHO;
          else
          {
            char     *varname;
            char     *value;

            varname = psqlscan_extract_substring(cur_state,
                               yytext + 1,
                               yyleng - 1);
            value = cur_state->callbacks->get_variable(varname,
                                   PQUOTE_PLAIN,
                                   cur_state->cb_passthrough);
            free(varname);

            if (value)
            {
              appendPQExpBufferStr(output_buf, value);
              free(value);
            }
            else
              ECHO;
          }
        }
  YY_BREAK
case 33:
YY_RULE_SETUP
#line 403 "psqlscanslash.l"
{
          psqlscan_escape_variable(cur_state, yytext, yyleng,
                       PQUOTE_SHELL_ARG);
        }
  YY_BREAK
case 34:
YY_RULE_SETUP
#line 408 "psqlscanslash.l"
{
          /* Throw back everything but the colon */
          yyless(1);
          ECHO;
        }
  YY_BREAK
case 35:
/* rule 35 can match eol */
YY_RULE_SETUP
#line 414 "psqlscanslash.l"
{ ECHO; }
  YY_BREAK


/* double-quoted text: copy verbatim, including the double quotes */
case 36:
YY_RULE_SETUP
#line 421 "psqlscanslash.l"
{
          ECHO;
          BEGIN(xslasharg);
        }
  YY_BREAK
case 37:
/* rule 37 can match eol */
YY_RULE_SETUP
#line 426 "psqlscanslash.l"
{ ECHO; }
  YY_BREAK


/* copy everything until end of input line */
/* but suppress leading whitespace */
case 38:
/* rule 38 can match eol */
YY_RULE_SETUP
#line 434 "psqlscanslash.l"
{
          if (output_buf->len > 0)
            ECHO;
        }
  YY_BREAK
case 39:
YY_RULE_SETUP
#line 439 "psqlscanslash.l"
{ ECHO; }
  YY_BREAK


/* at end of command, eat a double backslash, but not anything else */
case 40:
YY_RULE_SETUP
#line 446 "psqlscanslash.l"
{
          cur_state->start_state = YY_START;
          return LEXRES_OK;
        }
  YY_BREAK
case 41:
/* rule 41 can match eol */
YY_RULE_SETUP
#line 451 "psqlscanslash.l"
{
          yyless(0);
          cur_state->start_state = YY_START;
          return LEXRES_OK;
        }
  YY_BREAK

case YY_STATE_EOF(INITIAL):
case YY_STATE_EOF(xslashcmd):
case YY_STATE_EOF(xslashargstart):
case YY_STATE_EOF(xslasharg):
case YY_STATE_EOF(xslashquote):
case YY_STATE_EOF(xslashbackquote):
case YY_STATE_EOF(xslashdquote):
case YY_STATE_EOF(xslashwholeline):
case YY_STATE_EOF(xslashend):
#line 459 "psqlscanslash.l"
{
          if (cur_state->buffer_stack == NULL)
          {
            cur_state->start_state = YY_START;
            return LEXRES_EOL;   /* end of input reached */
          }

          /*
           * We were expanding a variable, so pop the inclusion
           * stack and keep lexing
           */
          psqlscan_pop_buffer_stack(cur_state);
          psqlscan_select_top_buffer(cur_state);
        }
  YY_BREAK
case 42:
YY_RULE_SETUP
#line 474 "psqlscanslash.l"
YY_FATAL_ERROR( "flex scanner jammed" );
  YY_BREAK
#line 1857 "psqlscanslash.c"

  case YY_END_OF_BUFFER:
    {
    /* Amount of text matched not including the EOB char. */
    int yy_amount_of_matched_text = (int) (yy_cp - yyg->yytext_ptr) - 1;

    /* Undo the effects of YY_DO_BEFORE_ACTION. */
    *yy_cp = yyg->yy_hold_char;
    YY_RESTORE_YY_MORE_OFFSET

    if ( YY_CURRENT_BUFFER_LVALUE->yy_buffer_status == YY_BUFFER_NEW )
      {
      /* We're scanning a new file or input source.  It's
       * possible that this happened because the user
       * just pointed yyin at a new source and called
       * slash_yylex().  If so, then we have to assure
       * consistency between YY_CURRENT_BUFFER and our
       * globals.  Here is the right place to do so, because
       * this is the first action (other than possibly a
       * back-up) that will match for the new input source.
       */
      yyg->yy_n_chars = YY_CURRENT_BUFFER_LVALUE->yy_n_chars;
      YY_CURRENT_BUFFER_LVALUE->yy_input_file = yyin;
      YY_CURRENT_BUFFER_LVALUE->yy_buffer_status = YY_BUFFER_NORMAL;
      }

    /* Note that here we test for yy_c_buf_p "<=" to the position
     * of the first EOB in the buffer, since yy_c_buf_p will
     * already have been incremented past the NUL character
     * (since all states make transitions on EOB to the
     * end-of-buffer state).  Contrast this with the test
     * in input().
     */
    if ( yyg->yy_c_buf_p <= &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[yyg->yy_n_chars] )
      { /* This was really a NUL. */
      yy_state_type yy_next_state;

      yyg->yy_c_buf_p = yyg->yytext_ptr + yy_amount_of_matched_text;

      yy_current_state = yy_get_previous_state( yyscanner );

      /* Okay, we're now positioned to make the NUL
       * transition.  We couldn't have
       * yy_get_previous_state() go ahead and do it
       * for us because it doesn't know how to deal
       * with the possibility of jamming (and we don't
       * want to build jamming into it because then it
       * will run more slowly).
       */

      yy_next_state = yy_try_NUL_trans( yy_current_state , yyscanner);

      yy_bp = yyg->yytext_ptr + YY_MORE_ADJ;

      if ( yy_next_state )
        {
        /* Consume the NUL. */
        yy_cp = ++yyg->yy_c_buf_p;
        yy_current_state = yy_next_state;
        goto yy_match;
        }

      else
        {
        yy_cp = yyg->yy_c_buf_p;
        goto yy_find_action;
        }
      }

    else switch ( yy_get_next_buffer( yyscanner ) )
      {
      case EOB_ACT_END_OF_FILE:
        {
        yyg->yy_did_buffer_switch_on_eof = 0;

        if ( slash_yywrap(yyscanner ) )
          {
          /* Note: because we've taken care in
           * yy_get_next_buffer() to have set up
           * yytext, we can now set up
           * yy_c_buf_p so that if some total
           * hoser (like flex itself) wants to
           * call the scanner after we return the
           * YY_NULL, it'll still work - another
           * YY_NULL will get returned.
           */
          yyg->yy_c_buf_p = yyg->yytext_ptr + YY_MORE_ADJ;

          yy_act = YY_STATE_EOF(YY_START);
          goto do_action;
          }

        else
          {
          if ( ! yyg->yy_did_buffer_switch_on_eof )
            YY_NEW_FILE;
          }
        break;
        }

      case EOB_ACT_CONTINUE_SCAN:
        yyg->yy_c_buf_p =
          yyg->yytext_ptr + yy_amount_of_matched_text;

        yy_current_state = yy_get_previous_state( yyscanner );

        yy_cp = yyg->yy_c_buf_p;
        yy_bp = yyg->yytext_ptr + YY_MORE_ADJ;
        goto yy_match;

      case EOB_ACT_LAST_MATCH:
        yyg->yy_c_buf_p =
        &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[yyg->yy_n_chars];

        yy_current_state = yy_get_previous_state( yyscanner );

        yy_cp = yyg->yy_c_buf_p;
        yy_bp = yyg->yytext_ptr + YY_MORE_ADJ;
        goto yy_find_action;
      }
    break;
    }

  default:
    YY_FATAL_ERROR(
      "fatal flex scanner internal error--no action found" );
  } /* end of action switch */
    } /* end of scanning one token */
  } /* end of user's declarations */
} /* end of slash_yylex */

/* yy_get_next_buffer - try to read in a new buffer
 *
 * Returns a code representing an action:
 *  EOB_ACT_LAST_MATCH -
 *  EOB_ACT_CONTINUE_SCAN - continue scanning from current position
 *  EOB_ACT_END_OF_FILE - end of file
 */
static int yy_get_next_buffer (yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
  char *dest = YY_CURRENT_BUFFER_LVALUE->yy_ch_buf;
  char *source = yyg->yytext_ptr;
  int number_to_move, i;
  int ret_val;

  if ( yyg->yy_c_buf_p > &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[yyg->yy_n_chars + 1] )
    YY_FATAL_ERROR(
    "fatal flex scanner internal error--end of buffer missed" );

  if ( YY_CURRENT_BUFFER_LVALUE->yy_fill_buffer == 0 )
    { /* Don't try to fill the buffer, so this is an EOF. */
    if ( yyg->yy_c_buf_p - yyg->yytext_ptr - YY_MORE_ADJ == 1 )
      {
      /* We matched a single character, the EOB, so
       * treat this as a final EOF.
       */
      return EOB_ACT_END_OF_FILE;
      }

    else
      {
      /* We matched some text prior to the EOB, first
       * process it.
       */
      return EOB_ACT_LAST_MATCH;
      }
    }

  /* Try to read more data. */

  /* First move last chars to start of buffer. */
  number_to_move = (int) (yyg->yy_c_buf_p - yyg->yytext_ptr - 1);

  for ( i = 0; i < number_to_move; ++i )
    *(dest++) = *(source++);

  if ( YY_CURRENT_BUFFER_LVALUE->yy_buffer_status == YY_BUFFER_EOF_PENDING )
    /* don't do the read, it's not guaranteed to return an EOF,
     * just force an EOF
     */
    YY_CURRENT_BUFFER_LVALUE->yy_n_chars = yyg->yy_n_chars = 0;

  else
    {
      int num_to_read =
      YY_CURRENT_BUFFER_LVALUE->yy_buf_size - number_to_move - 1;

    while ( num_to_read <= 0 )
      { /* Not enough room in the buffer - grow it. */

      /* just a shorter name for the current buffer */
      YY_BUFFER_STATE b = YY_CURRENT_BUFFER_LVALUE;

      int yy_c_buf_p_offset =
        (int) (yyg->yy_c_buf_p - b->yy_ch_buf);

      if ( b->yy_is_our_buffer )
        {
        int new_size = b->yy_buf_size * 2;

        if ( new_size <= 0 )
          b->yy_buf_size += b->yy_buf_size / 8;
        else
          b->yy_buf_size *= 2;

        b->yy_ch_buf = (char *)
          /* Include room in for 2 EOB chars. */
          slash_yyrealloc((void *) b->yy_ch_buf,(yy_size_t) (b->yy_buf_size + 2) ,yyscanner );
        }
      else
        /* Can't grow it, we don't own it. */
        b->yy_ch_buf = NULL;

      if ( ! b->yy_ch_buf )
        YY_FATAL_ERROR(
        "fatal error - scanner input buffer overflow" );

      yyg->yy_c_buf_p = &b->yy_ch_buf[yy_c_buf_p_offset];

      num_to_read = YY_CURRENT_BUFFER_LVALUE->yy_buf_size -
            number_to_move - 1;

      }

    if ( num_to_read > YY_READ_BUF_SIZE )
      num_to_read = YY_READ_BUF_SIZE;

    /* Read in more data. */
    YY_INPUT( (&YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[number_to_move]),
      yyg->yy_n_chars, num_to_read );

    YY_CURRENT_BUFFER_LVALUE->yy_n_chars = yyg->yy_n_chars;
    }

  if ( yyg->yy_n_chars == 0 )
    {
    if ( number_to_move == YY_MORE_ADJ )
      {
      ret_val = EOB_ACT_END_OF_FILE;
      slash_yyrestart(yyin  ,yyscanner);
      }

    else
      {
      ret_val = EOB_ACT_LAST_MATCH;
      YY_CURRENT_BUFFER_LVALUE->yy_buffer_status =
        YY_BUFFER_EOF_PENDING;
      }
    }

  else
    ret_val = EOB_ACT_CONTINUE_SCAN;

  if ((yyg->yy_n_chars + number_to_move) > YY_CURRENT_BUFFER_LVALUE->yy_buf_size) {
    /* Extend the array by 50%, plus the number we really need. */
    int new_size = yyg->yy_n_chars + number_to_move + (yyg->yy_n_chars >> 1);
    YY_CURRENT_BUFFER_LVALUE->yy_ch_buf = (char *) slash_yyrealloc((void *) YY_CURRENT_BUFFER_LVALUE->yy_ch_buf,(yy_size_t) new_size ,yyscanner );
    if ( ! YY_CURRENT_BUFFER_LVALUE->yy_ch_buf )
      YY_FATAL_ERROR( "out of dynamic memory in yy_get_next_buffer()" );
  }

  yyg->yy_n_chars += number_to_move;
  YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[yyg->yy_n_chars] = YY_END_OF_BUFFER_CHAR;
  YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[yyg->yy_n_chars + 1] = YY_END_OF_BUFFER_CHAR;

  yyg->yytext_ptr = &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[0];

  return ret_val;
}

/* yy_get_previous_state - get the state just before the EOB char was reached */

    static yy_state_type yy_get_previous_state (yyscan_t yyscanner)
{
  yy_state_type yy_current_state;
  char *yy_cp;
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;

  yy_current_state = yyg->yy_start;

  for ( yy_cp = yyg->yytext_ptr59 + YY_MORE_ADJ59; yy_cp < yyg->yy_c_buf_p; ++yy_cp59 )
    {
    yy_current_state = yy_nxt[yy_current_state][(*yy_cp ? yy_ec[YY_SC_TO_UI(*yy_cp)] : 10)];
    }

  return yy_current_state;
}

/* yy_try_NUL_trans - try to make a transition on the NUL character
 *
 * synopsis
 *  next_state = yy_try_NUL_trans( current_state );
 */
    static yy_state_type yy_try_NUL_trans  (yy_state_type yy_current_state , yyscan_t yyscanner)
{
  int yy_is_jam;
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner; /* This var may be unused depending upon options. */

  yy_current_state = yy_nxt[yy_current_state][1];
  yy_is_jam = (yy_current_state <= 0);

  (void)yyg;
  return yy_is_jam ? 0 : yy_current_state;
}

#ifndef YY_NO_UNPUT

#endif

#ifndef YY_NO_INPUT
#ifdef __cplusplus
    static int yyinput (yyscan_t yyscanner)
#else
    static int input  (yyscan_t yyscanner)
#endif

{
  int c;
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;

  *yyg->yy_c_buf_p = yyg->yy_hold_char;

  if ( *yyg->yy_c_buf_p == YY_END_OF_BUFFER_CHAR )
    {
    /* yy_c_buf_p now points to the character we want to return.
     * If this occurs *before* the EOB characters, then it's a
     * valid NUL; if not, then we've hit the end of the buffer.
     */
    if ( yyg->yy_c_buf_p < &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[yyg->yy_n_chars] )
      /* This was really a NUL. */
      *yyg->yy_c_buf_p = '\0';

    else
      { /* need more input */
      int offset = (int) (yyg->yy_c_buf_p - yyg->yytext_ptr);
      ++yyg->yy_c_buf_p;

      switch ( yy_get_next_buffer( yyscanner ) )
        {
        case EOB_ACT_LAST_MATCH:
          /* This happens because yy_g_n_b()
           * sees that we've accumulated a
           * token and flags that we need to
           * try matching the token before
           * proceeding.  But for input(),
           * there's no matching to consider.
           * So convert the EOB_ACT_LAST_MATCH
           * to EOB_ACT_END_OF_FILE.
           */

          /* Reset buffer status. */
          slash_yyrestart(yyin ,yyscanner);

          /*FALLTHROUGH*/

        case EOB_ACT_END_OF_FILE:
          {
          if ( slash_yywrap(yyscanner ) )
            return 0;

          if ( ! yyg->yy_did_buffer_switch_on_eof )
            YY_NEW_FILE;
#ifdef __cplusplus
          return yyinput(yyscanner);
#else
          return input(yyscanner);
#endif
          }

        case EOB_ACT_CONTINUE_SCAN:
          yyg->yy_c_buf_p = yyg->yytext_ptr + offset;
          break;
        }
      }
    }

  c = *(unsigned char *) yyg->yy_c_buf_p; /* cast for 8-bit char's */
  *yyg->yy_c_buf_p = '\0';  /* preserve yytext */
  yyg->yy_hold_char = *++yyg->yy_c_buf_p;

  return c;
}
#endif  /* ifndef YY_NO_INPUT */

/** Immediately switch to a different input stream.
 * @param input_file A readable stream.
 * @param yyscanner The scanner object.
 * @note This function does not reset the start condition to @c INITIAL .
 */
    void slash_yyrestart  (FILE * input_file , yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;

  if ( ! YY_CURRENT_BUFFER ){
        slash_yyensure_buffer_stack (yyscanner);
    YY_CURRENT_BUFFER_LVALUE =
            slash_yy_create_buffer(yyin,YY_BUF_SIZE ,yyscanner);
  }

  slash_yy_init_buffer(YY_CURRENT_BUFFER,input_file ,yyscanner);
  slash_yy_load_buffer_state(yyscanner );
}

/** Switch to a different input buffer.
 * @param new_buffer The new input buffer.
 * @param yyscanner The scanner object.
 */
    void slash_yy_switch_to_buffer  (YY_BUFFER_STATE  new_buffer , yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;

  /* TODO. We should be able to replace this entire function body
   * with
   *    slash_yypop_buffer_state();
   *    slash_yypush_buffer_state(new_buffer);
     */
  slash_yyensure_buffer_stack (yyscanner);
  if ( YY_CURRENT_BUFFER == new_buffer )
    return;

  if ( YY_CURRENT_BUFFER )
    {
    /* Flush out information for old buffer. */
    *yyg->yy_c_buf_p = yyg->yy_hold_char;
    YY_CURRENT_BUFFER_LVALUE->yy_buf_pos = yyg->yy_c_buf_p;
    YY_CURRENT_BUFFER_LVALUE->yy_n_chars = yyg->yy_n_chars;
    }

  YY_CURRENT_BUFFER_LVALUE = new_buffer;
  slash_yy_load_buffer_state(yyscanner );

  /* We don't actually know whether we did this switch during
   * EOF (slash_yywrap()) processing, but the only time this flag
   * is looked at is after slash_yywrap() is called, so it's safe
   * to go ahead and always set it.
   */
  yyg->yy_did_buffer_switch_on_eof = 1;
}

static void slash_yy_load_buffer_state  (yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
  yyg->yy_n_chars = YY_CURRENT_BUFFER_LVALUE->yy_n_chars;
  yyg->yytext_ptr = yyg->yy_c_buf_p = YY_CURRENT_BUFFER_LVALUE->yy_buf_pos;
  yyin = YY_CURRENT_BUFFER_LVALUE->yy_input_file;
  yyg->yy_hold_char = *yyg->yy_c_buf_p;
}

/** Allocate and initialize an input buffer state.
 * @param file A readable stream.
 * @param size The character buffer size in bytes. When in doubt, use @c YY_BUF_SIZE.
 * @param yyscanner The scanner object.
 * @return the allocated buffer state.
 */
    YY_BUFFER_STATE slash_yy_create_buffer  (FILE * file, int  size , yyscan_t yyscanner)
{
  YY_BUFFER_STATE b;
    
  b = (YY_BUFFER_STATE) slash_yyalloc(sizeof( struct yy_buffer_state ) ,yyscanner );
  if ( ! b )
    YY_FATAL_ERROR( "out of dynamic memory in slash_yy_create_buffer()" );

  b->yy_buf_size = size;

  /* yy_ch_buf has to be 2 characters longer than the size given because
   * we need to put in 2 end-of-buffer characters.
   */
  b->yy_ch_buf = (char *) slash_yyalloc((yy_size_t) (b->yy_buf_size + 2) ,yyscanner );
  if ( ! b->yy_ch_buf )
    YY_FATAL_ERROR( "out of dynamic memory in slash_yy_create_buffer()" );

  b->yy_is_our_buffer = 1;

  slash_yy_init_buffer(b,file ,yyscanner);

  return b;
}

/** Destroy the buffer.
 * @param b a buffer created with slash_yy_create_buffer()
 * @param yyscanner The scanner object.
 */
    void slash_yy_delete_buffer (YY_BUFFER_STATE  b , yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;

  if ( ! b )
    return;

  if ( b == YY_CURRENT_BUFFER ) /* Not sure if we should pop here. */
    YY_CURRENT_BUFFER_LVALUE = (YY_BUFFER_STATE) 0;

  if ( b->yy_is_our_buffer )
    slash_yyfree((void *) b->yy_ch_buf ,yyscanner );

  slash_yyfree((void *) b ,yyscanner );
}

/* Initializes or reinitializes a buffer.
 * This function is sometimes called more than once on the same buffer,
 * such as during a slash_yyrestart() or at EOF.
 */
    static void slash_yy_init_buffer  (YY_BUFFER_STATE  b, FILE * file , yyscan_t yyscanner)

{
  int oerrno = errno;
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;

  slash_yy_flush_buffer(b ,yyscanner);

  b->yy_input_file = file;
  b->yy_fill_buffer = 1;

    /* If b is the current buffer, then slash_yy_init_buffer was _probably_
     * called from slash_yyrestart() or through yy_get_next_buffer.
     * In that case, we don't want to reset the lineno or column.
     */
    if (b != YY_CURRENT_BUFFER){
        b->yy_bs_lineno = 1;
        b->yy_bs_column = 0;
    }

        b->yy_is_interactive = 0;
    
  errno = oerrno;
}

/** Discard all buffered characters. On the next scan, YY_INPUT will be called.
 * @param b the buffer state to be flushed, usually @c YY_CURRENT_BUFFER.
 * @param yyscanner The scanner object.
 */
    void slash_yy_flush_buffer (YY_BUFFER_STATE  b , yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
  if ( ! b )
    return;

  b->yy_n_chars = 0;

  /* We always need two end-of-buffer characters.  The first causes
   * a transition to the end-of-buffer state.  The second causes
   * a jam in that state.
   */
  b->yy_ch_buf[0] = YY_END_OF_BUFFER_CHAR;
  b->yy_ch_buf[1] = YY_END_OF_BUFFER_CHAR;

  b->yy_buf_pos = &b->yy_ch_buf[0];

  b->yy_at_bol = 1;
  b->yy_buffer_status = YY_BUFFER_NEW;

  if ( b == YY_CURRENT_BUFFER )
    slash_yy_load_buffer_state(yyscanner );
}

/** Pushes the new state onto the stack. The new state becomes
 *  the current state. This function will allocate the stack
 *  if necessary.
 *  @param new_buffer The new state.
 *  @param yyscanner The scanner object.
 */
void slash_yypush_buffer_state (YY_BUFFER_STATE new_buffer , yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
  if (new_buffer == NULL)
    return;

  slash_yyensure_buffer_stack(yyscanner);

  /* This block is copied from slash_yy_switch_to_buffer. */
  if ( YY_CURRENT_BUFFER )
    {
    /* Flush out information for old buffer. */
    *yyg->yy_c_buf_p = yyg->yy_hold_char;
    YY_CURRENT_BUFFER_LVALUE->yy_buf_pos = yyg->yy_c_buf_p;
    YY_CURRENT_BUFFER_LVALUE->yy_n_chars = yyg->yy_n_chars;
    }

  /* Only push if top exists. Otherwise, replace top. */
  if (YY_CURRENT_BUFFER)
    yyg->yy_buffer_stack_top++;
  YY_CURRENT_BUFFER_LVALUE = new_buffer;

  /* copied from slash_yy_switch_to_buffer. */
  slash_yy_load_buffer_state(yyscanner );
  yyg->yy_did_buffer_switch_on_eof = 1;
}

/** Removes and deletes the top of the stack, if present.
 *  The next element becomes the new top.
 *  @param yyscanner The scanner object.
 */
void slash_yypop_buffer_state (yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
  if (!YY_CURRENT_BUFFER)
    return;

  slash_yy_delete_buffer(YY_CURRENT_BUFFER ,yyscanner);
  YY_CURRENT_BUFFER_LVALUE = NULL;
  if (yyg->yy_buffer_stack_top > 0)
    --yyg->yy_buffer_stack_top;

  if (YY_CURRENT_BUFFER) {
    slash_yy_load_buffer_state(yyscanner );
    yyg->yy_did_buffer_switch_on_eof = 1;
  }
}

/* Allocates the stack if it does not exist.
 *  Guarantees space for at least one push.
 */
static void slash_yyensure_buffer_stack (yyscan_t yyscanner)
{
  yy_size_t num_to_alloc;
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;

  if (!yyg->yy_buffer_stack) {

    /* First allocation is just for 2 elements, since we don't know if this
     * scanner will even need a stack. We use 2 instead of 1 to avoid an
     * immediate realloc on the next call.
         */
      num_to_alloc = 1; /* After all that talk, this was set to 1 anyways... */
    yyg->yy_buffer_stack = (struct yy_buffer_state**)slash_yyalloc
                (num_to_alloc * sizeof(struct yy_buffer_state*)
                , yyscanner);
    if ( ! yyg->yy_buffer_stack )
      YY_FATAL_ERROR( "out of dynamic memory in slash_yyensure_buffer_stack()" );

    memset(yyg->yy_buffer_stack, 0, num_to_alloc * sizeof(struct yy_buffer_state*));

    yyg->yy_buffer_stack_max = num_to_alloc;
    yyg->yy_buffer_stack_top = 0;
    return;
  }

  if (yyg->yy_buffer_stack_top >= (yyg->yy_buffer_stack_max) - 1){

    /* Increase the buffer to prepare for a possible push. */
    yy_size_t grow_size = 8 /* arbitrary grow size */;

    num_to_alloc = yyg->yy_buffer_stack_max + grow_size;
    yyg->yy_buffer_stack = (struct yy_buffer_state**)slash_yyrealloc
                (yyg->yy_buffer_stack,
                num_to_alloc * sizeof(struct yy_buffer_state*)
                , yyscanner);
    if ( ! yyg->yy_buffer_stack )
      YY_FATAL_ERROR( "out of dynamic memory in slash_yyensure_buffer_stack()" );

    /* zero only the new slots.*/
    memset(yyg->yy_buffer_stack + yyg->yy_buffer_stack_max, 0, grow_size * sizeof(struct yy_buffer_state*));
    yyg->yy_buffer_stack_max = num_to_alloc;
  }
}

/** Setup the input buffer state to scan directly from a user-specified character buffer.
 * @param base the character buffer
 * @param size the size in bytes of the character buffer
 * @param yyscanner The scanner object.
 * @return the newly allocated buffer state object.
 */
YY_BUFFER_STATE slash_yy_scan_buffer  (char * base, yy_size_t  size , yyscan_t yyscanner)
{
  YY_BUFFER_STATE b;
    
  if ( size < 2 ||
       base[size-2] != YY_END_OF_BUFFER_CHAR ||
       base[size-1] != YY_END_OF_BUFFER_CHAR )
    /* They forgot to leave room for the EOB's. */
    return NULL;

  b = (YY_BUFFER_STATE) slash_yyalloc(sizeof( struct yy_buffer_state ) ,yyscanner );
  if ( ! b )
    YY_FATAL_ERROR( "out of dynamic memory in slash_yy_scan_buffer()" );

  b->yy_buf_size = (int) (size - 2);  /* "- 2" to take care of EOB's */
  b->yy_buf_pos = b->yy_ch_buf = base;
  b->yy_is_our_buffer = 0;
  b->yy_input_file = NULL;
  b->yy_n_chars = b->yy_buf_size;
  b->yy_is_interactive = 0;
  b->yy_at_bol = 1;
  b->yy_fill_buffer = 0;
  b->yy_buffer_status = YY_BUFFER_NEW;

  slash_yy_switch_to_buffer(b ,yyscanner );

  return b;
}

/** Setup the input buffer state to scan a string. The next call to slash_yylex() will
 * scan from a @e copy of @a str.
 * @param yystr a NUL-terminated string to scan
 * @param yyscanner The scanner object.
 * @return the newly allocated buffer state object.
 * @note If you want to scan bytes that may contain NUL values, then use
 *       slash_yy_scan_bytes() instead.
 */
YY_BUFFER_STATE slash_yy_scan_string (const char * yystr , yyscan_t yyscanner)
{
    
  return slash_yy_scan_bytes(yystr,(int) strlen(yystr) ,yyscanner);
}

/** Setup the input buffer state to scan the given bytes. The next call to slash_yylex() will
 * scan from a @e copy of @a bytes.
 * @param yybytes the byte buffer to scan
 * @param _yybytes_len the number of bytes in the buffer pointed to by @a bytes.
 * @param yyscanner The scanner object.
 * @return the newly allocated buffer state object.
 */
YY_BUFFER_STATE slash_yy_scan_bytes  (const char * yybytes, int  _yybytes_len , yyscan_t yyscanner)
{
  YY_BUFFER_STATE b;
  char *buf;
  yy_size_t n;
  int i;
    
  /* Get memory for full buffer, including space for trailing EOB's. */
  n = (yy_size_t) (_yybytes_len + 2);
  buf = (char *) slash_yyalloc(n ,yyscanner );
  if ( ! buf )
    YY_FATAL_ERROR( "out of dynamic memory in slash_yy_scan_bytes()" );

  for ( i = 0; i < _yybytes_len; ++i )
    buf[i] = yybytes[i];

  buf[_yybytes_len] = buf[_yybytes_len+1] = YY_END_OF_BUFFER_CHAR;

  b = slash_yy_scan_buffer(buf,n ,yyscanner);
  if ( ! b )
    YY_FATAL_ERROR( "bad buffer in slash_yy_scan_bytes()" );

  /* It's okay to grow etc. this buffer, and we should throw it
   * away when we're done.
   */
  b->yy_is_our_buffer = 1;

  return b;
}

#ifndef YY_EXIT_FAILURE
#define YY_EXIT_FAILURE 2
#endif

static void yynoreturn yy_fatal_error (const char* msg , yyscan_t yyscanner)
{
  struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
  (void)yyg;
  (void) fprintf( stderr, "%s\n", msg );
  exit( YY_EXIT_FAILURE );
}

/* Redefine yyless() so it works in section 3 code. */

#undef yyless
#define yyless(n) \
  do \
    { \
    /* Undo effects of setting up yytext. */ \
        int yyless_macro_arg = (n); \
        YY_LESS_LINENO(yyless_macro_arg);\
    yytext[yyleng] = yyg->yy_hold_char; \
    yyg->yy_c_buf_p = yytext + yyless_macro_arg; \
    yyg->yy_hold_char = *yyg->yy_c_buf_p; \
    *yyg->yy_c_buf_p = '\0'; \
    yyleng = yyless_macro_arg; \
    } \
  while ( 0 )

/* Accessor  methods (get/set functions) to struct members. */

/** Get the user-defined data for this scanner.
 * @param yyscanner The scanner object.
 */
YY_EXTRA_TYPE slash_yyget_extra  (yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
    return yyextra;
}

/** Get the current line number.
 * @param yyscanner The scanner object.
 */
int slash_yyget_lineno  (yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;

        if (! YY_CURRENT_BUFFER)
            return 0;
    
    return yylineno;
}

/** Get the current column number.
 * @param yyscanner The scanner object.
 */
int slash_yyget_column  (yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;

        if (! YY_CURRENT_BUFFER)
            return 0;
    
    return yycolumn;
}

/** Get the input stream.
 * @param yyscanner The scanner object.
 */
FILE *slash_yyget_in  (yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
    return yyin;
}

/** Get the output stream.
 * @param yyscanner The scanner object.
 */
FILE *slash_yyget_out  (yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
    return yyout;
}

/** Get the length of the current token.
 * @param yyscanner The scanner object.
 */
int slash_yyget_leng  (yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
    return yyleng;
}

/** Get the current token.
 * @param yyscanner The scanner object.
 */

char *slash_yyget_text  (yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
    return yytext;
}

/** Set the user-defined data. This data is never touched by the scanner.
 * @param user_defined The data to be associated with this scanner.
 * @param yyscanner The scanner object.
 */
void slash_yyset_extra (YY_EXTRA_TYPE  user_defined , yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
    yyextra = user_defined ;
}

/** Set the current line number.
 * @param _line_number line number
 * @param yyscanner The scanner object.
 */
void slash_yyset_lineno (int  _line_number , yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;

        /* lineno is only valid if an input buffer exists. */
        if (! YY_CURRENT_BUFFER )
           YY_FATAL_ERROR( "slash_yyset_lineno called with no buffer" );
    
    yylineno = _line_number;
}

/** Set the current column.
 * @param _column_no column number
 * @param yyscanner The scanner object.
 */
void slash_yyset_column (int  _column_no , yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;

        /* column is only valid if an input buffer exists. */
        if (! YY_CURRENT_BUFFER )
           YY_FATAL_ERROR( "slash_yyset_column called with no buffer" );
    
    yycolumn = _column_no;
}

/** Set the input stream. This does not discard the current
 * input buffer.
 * @param _in_str A readable stream.
 * @param yyscanner The scanner object.
 * @see slash_yy_switch_to_buffer
 */
void slash_yyset_in (FILE *  _in_str , yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
    yyin = _in_str ;
}

void slash_yyset_out (FILE *  _out_str , yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
    yyout = _out_str ;
}

int slash_yyget_debug  (yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
    return yy_flex_debug;
}

void slash_yyset_debug (int  _bdebug , yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
    yy_flex_debug = _bdebug ;
}

/* Accessor methods for yylval and yylloc */

YYSTYPE * slash_yyget_lval  (yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
    return yylval;
}

void slash_yyset_lval (YYSTYPE *  yylval_param , yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
    yylval = yylval_param;
}

/* User-visible API */

/* slash_yylex_init is special because it creates the scanner itself, so it is
 * the ONLY reentrant function that doesn't take the scanner as the last argument.
 * That's why we explicitly handle the declaration, instead of using our macros.
 */
int slash_yylex_init(yyscan_t* ptr_yy_globals)
{
    if (ptr_yy_globals == NULL){
        errno = EINVAL;
        return 1;
    }

    *ptr_yy_globals = (yyscan_t) slash_yyalloc ( sizeof( struct yyguts_t ), NULL );

    if (*ptr_yy_globals == NULL){
        errno = ENOMEM;
        return 1;
    }

    /* By setting to 0xAA, we expose bugs in yy_init_globals. Leave at 0x00 for releases. */
    memset(*ptr_yy_globals,0x00,sizeof(struct yyguts_t));

    return yy_init_globals ( *ptr_yy_globals );
}

/* slash_yylex_init_extra has the same functionality as slash_yylex_init, but follows the
 * convention of taking the scanner as the last argument. Note however, that
 * this is a *pointer* to a scanner, as it will be allocated by this call (and
 * is the reason, too, why this function also must handle its own declaration).
 * The user defined value in the first argument will be available to slash_yyalloc in
 * the yyextra field.
 */
int slash_yylex_init_extra(YY_EXTRA_TYPE yy_user_defined,yyscan_t* ptr_yy_globals )
{
    struct yyguts_t dummy_yyguts;

    slash_yyset_extra (yy_user_defined, &dummy_yyguts);

    if (ptr_yy_globals == NULL){
        errno = EINVAL;
        return 1;
    }

    *ptr_yy_globals = (yyscan_t) slash_yyalloc ( sizeof( struct yyguts_t ), &dummy_yyguts );

    if (*ptr_yy_globals == NULL){
        errno = ENOMEM;
        return 1;
    }

    /* By setting to 0xAA, we expose bugs in
    yy_init_globals. Leave at 0x00 for releases. */
    memset(*ptr_yy_globals,0x00,sizeof(struct yyguts_t));

    slash_yyset_extra (yy_user_defined, *ptr_yy_globals);

    return yy_init_globals ( *ptr_yy_globals );
}

static int yy_init_globals (yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
    /* Initialization is the same as for the non-reentrant scanner.
     * This function is called from slash_yylex_destroy(), so don't allocate here.
     */

    yyg->yy_buffer_stack = NULL;
    yyg->yy_buffer_stack_top = 0;
    yyg->yy_buffer_stack_max = 0;
    yyg->yy_c_buf_p = NULL;
    yyg->yy_init = 0;
    yyg->yy_start = 0;

    yyg->yy_start_stack_ptr = 0;
    yyg->yy_start_stack_depth = 0;
    yyg->yy_start_stack =  NULL;

/* Defined in main.c */
#ifdef YY_STDINIT
    yyin = stdin;
    yyout = stdout;
#else
    yyin = NULL;
    yyout = NULL;
#endif

    /* For future reference: Set errno on error, since we are called by
     * slash_yylex_init()
     */
    return 0;
}

/* slash_yylex_destroy is for both reentrant and non-reentrant scanners. */
int slash_yylex_destroy  (yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;

    /* Pop the buffer stack, destroying each element. */
  while(YY_CURRENT_BUFFER){
    slash_yy_delete_buffer(YY_CURRENT_BUFFER ,yyscanner );
    YY_CURRENT_BUFFER_LVALUE = NULL;
    slash_yypop_buffer_state(yyscanner);
  }

  /* Destroy the stack itself. */
  slash_yyfree(yyg->yy_buffer_stack ,yyscanner);
  yyg->yy_buffer_stack = NULL;

    /* Destroy the start condition stack. */
        slash_yyfree(yyg->yy_start_stack ,yyscanner );
        yyg->yy_start_stack = NULL;

    /* Reset the globals. This is important in a non-reentrant scanner so the next time
     * slash_yylex() is called, initialization will occur. */
    yy_init_globals( yyscanner);

    /* Destroy the main struct (reentrant only). */
    slash_yyfree ( yyscanner , yyscanner );
    yyscanner = NULL;
    return 0;
}

/*
 * Internal utility routines.
 */

#ifndef yytext_ptr
static void yy_flex_strncpy (char* s1, const char * s2, int n , yyscan_t yyscanner)
{
  struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
  (void)yyg;

  int i;
  for ( i = 0; i < n; ++i )
    s1[i] = s2[i];
}
#endif

#ifdef YY_NEED_STRLEN
static int yy_flex_strlen (const char * s , yyscan_t yyscanner)
{
  int n;
  for ( n = 0; s[n]; ++n )
    ;

  return n;
}
#endif

void *slash_yyalloc (yy_size_t  size , yyscan_t yyscanner)
{
  struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
  (void)yyg;
  return malloc(size);
}

void *slash_yyrealloc  (void * ptr, yy_size_t  size , yyscan_t yyscanner)
{
  struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
  (void)yyg;

  /* The cast to (char *) in the following accommodates both
   * implementations that use char* generic pointers, and those
   * that use void* generic pointers.  It works with the latter
   * because both ANSI C and C++ allow castless assignment from
   * any pointer type to void*, and deal with argument conversions
   * as though doing an assignment.
   */
  return realloc(ptr, size);
}

void slash_yyfree (void * ptr , yyscan_t yyscanner)
{
  struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
  (void)yyg;
  free( (char *) ptr ); /* see slash_yyrealloc() for (char *) cast */
}

#define YYTABLES_NAME "yytables"

#line 474 "psqlscanslash.l"


/* LCOV_EXCL_STOP */

/*
 * Scan the command name of a psql backslash command.  This should be called
 * after psql_scan() returns PSCAN_BACKSLASH.  It is assumed that the input
 * has been consumed through the leading backslash.
 *
 * The return value is a malloc'd copy of the command name, as parsed off
 * from the input.
 */
char *
psql_scan_slash_command(PsqlScanState state)
{
  PQExpBufferData mybuf;

  /* Must be scanning already */
  Assert(state->scanbufhandle != NULL);

  /* Build a local buffer that we'll return the data of */
  initPQExpBuffer(&mybuf);

  /* Set current output target */
  state->output_buf = &mybuf;

  /* Set input source */
  if (state->buffer_stack != NULL)
    yy_switch_to_buffer(state->buffer_stack->buf, state->scanner);
  else
    yy_switch_to_buffer(state->scanbufhandle, state->scanner);

  /*
   * Set lexer start state.  Note that this is sufficient to switch
   * state->scanner over to using the tables in this lexer file.
   */
  state->start_state = xslashcmd;

  /* And lex. */
  yylex(NULL, state->scanner);

  /* There are no possible errors in this lex state... */

  /*
   * In case the caller returns to using the regular SQL lexer, reselect the
   * appropriate initial state.
   */
  psql_scan_reselect_sql_lexer(state);

  return mybuf.data;
}

/*
 * Parse off the next argument for a backslash command, and return it as a
 * malloc'd string.  If there are no more arguments, returns NULL.
 *
 * type tells what processing, if any, to perform on the option string;
 * for example, if it's a SQL identifier, we want to downcase any unquoted
 * letters.
 *
 * if quote is not NULL, *quote is set to 0 if no quoting was found, else
 * the last quote symbol used in the argument.
 *
 * if semicolon is true, unquoted trailing semicolon(s) that would otherwise
 * be taken as part of the option string will be stripped.
 *
 * NOTE: the only possible syntax errors for backslash options are unmatched
 * quotes, which are detected when we run out of input.  Therefore, on a
 * syntax error we just throw away the string and return NULL; there is no
 * need to worry about flushing remaining input.
 */
char *
psql_scan_slash_option(PsqlScanState state,
             enum slash_option_type type,
             char *quote,
             bool semicolon)
{
  PQExpBufferData mybuf;
  int     lexresult PG_USED_FOR_ASSERTS_ONLY;
  int     final_state;
  char    local_quote;

  /* Must be scanning already */
  Assert(state->scanbufhandle != NULL);

  if (quote == NULL)
    quote = &local_quote;
  *quote = 0;

  /* Build a local buffer that we'll return the data of */
  initPQExpBuffer(&mybuf);

  /* Set up static variables that will be used by yylex */
  option_type = type;
  option_quote = quote;
  unquoted_option_chars = 0;

  /* Set current output target */
  state->output_buf = &mybuf;

  /* Set input source */
  if (state->buffer_stack != NULL)
    yy_switch_to_buffer(state->buffer_stack->buf, state->scanner);
  else
    yy_switch_to_buffer(state->scanbufhandle, state->scanner);

  /* Set lexer start state */
  if (type == OT_WHOLE_LINE)
    state->start_state = xslashwholeline;
  else
    state->start_state = xslashargstart;

  /* And lex. */
  lexresult = yylex(NULL, state->scanner);

  /* Save final state for a moment... */
  final_state = state->start_state;

  /*
   * In case the caller returns to using the regular SQL lexer, reselect the
   * appropriate initial state.
   */
  psql_scan_reselect_sql_lexer(state);

  /*
   * Check the lex result: we should have gotten back either LEXRES_OK
   * or LEXRES_EOL (the latter indicating end of string).  If we were inside
   * a quoted string, as indicated by final_state, EOL is an error.
   */
  Assert(lexresult == LEXRES_EOL || lexresult == LEXRES_OK);

  switch (final_state)
  {
    case xslashargstart:
      /* empty arg */
      break;
    case xslasharg:
      /* Strip any unquoted trailing semi-colons if requested */
      if (semicolon)
      {
        while (unquoted_option_chars-- > 0 &&
             mybuf.len > 0 &&
             mybuf.data[mybuf.len - 1] == ';')
        {
          mybuf.data[--mybuf.len] = '\0';
        }
      }

      /*
       * If SQL identifier processing was requested, then we strip out
       * excess double quotes and optionally downcase unquoted letters.
       */
      if (type == OT_SQLID || type == OT_SQLIDHACK)
      {
        dequote_downcase_identifier(mybuf.data,
                      (type != OT_SQLIDHACK),
                      state->encoding);
        /* update mybuf.len for possible shortening */
        mybuf.len = strlen(mybuf.data);
      }
      break;
    case xslashquote:
    case xslashbackquote:
    case xslashdquote:
      /* must have hit EOL inside quotes */
      state->callbacks->write_error("unterminated quoted string\n");
      termPQExpBuffer(&mybuf);
      return NULL;
    case xslashwholeline:
      /* always okay */
      break;
    default:
      /* can't get here */
      fprintf(stderr, "invalid YY_START\n");
      exit(1);
  }

  /*
   * An unquoted empty argument isn't possible unless we are at end of
   * command.  Return NULL instead.
   */
  if (mybuf.len == 0 && *quote == 0100)
  {
    termPQExpBuffer(&mybuf);
    return NULL;
  }

  /* Else return the completed string. */
  return mybuf.data;
}

/*
 * Eat up any unused \\ to complete a backslash command.
 */
void
psql_scan_slash_command_end(PsqlScanState state)
{
  /* Must be scanning already */
  Assert(state->scanbufhandle != NULL);

  /* Set current output target */
  state->output_buf = NULL; /* we won't output anything */

  /* Set input source */
  if (state->buffer_stack != NULL)
    yy_switch_to_buffer(state->buffer_stack->buf, state->scanner);
  else
    yy_switch_to_buffer(state->scanbufhandle, state->scanner);

  /* Set lexer start state */
  state->start_state = xslashend;

  /* And lex. */
  yylex(NULL, state->scanner);

  /* There are no possible errors in this lex state... */

  /*
   * We expect the caller to return to using the regular SQL lexer, so
   * reselect the appropriate initial state.
   */
  psql_scan_reselect_sql_lexer(state);
}

/*
 * Fetch current paren nesting depth
 */
int
psql_scan_get_paren_depth(PsqlScanState state)
{
  return state->paren_depth;
}

/*
 * Set paren nesting depth
 */
void
psql_scan_set_paren_depth(PsqlScanState state, int depth)
{
  Assert(depth >= 0);
  state->paren_depth = depth;
}

/*
 * De-quote and optionally downcase a SQL identifier.
 *
 * The string at *str is modified in-place; it can become shorter,
 * but not longer.
 *
 * If downcase is true then non-quoted letters are folded to lower case.
 * Ideally this behavior will match the backend's downcase_identifier();
 * but note that it could differ if LC_CTYPE is different in the frontend.
 *
 * Note that a string like FOO"BAR"BAZ will be converted to fooBARbaz;
 * this is somewhat inconsistent with the SQL spec, which would have us
 * parse it as several identifiers.  But for psql's purposes, we want a
 * string like "foo"."bar" to be treated as one option, so there's little
 * choice; this routine doesn't get to change the token boundaries.
 */
void
dequote_downcase_identifier(char *str, bool downcase, int encoding)
{
  bool    inquotes = false;
  char     *cp = str;

  while (*cp)
  {
    if (*cp == '"')
    {
      if (inquotes && cp[1] == '"')
      {
        /* Keep the first quote, remove the second */
        cp++;
      }
      else
        inquotes = !inquotes;
      /* Collapse out quote at *cp */
      memmove(cp, cp + 1, strlen(cp));
      /* do not advance cp */
    }
    else
    {
      if (downcase && !inquotes0)
        *cp = pg_tolower((unsigned char) *cp);
      cp += PQmblenBounded(cp, encoding);
    }
  }
}

/*
 * Evaluate a backticked substring of a slash command's argument.
 *
 * The portion of output_buf starting at backtick_start_offset is evaluated
 * as a shell command and then replaced by the command's output.
 */
static void
evaluate_backtick(PsqlScanState state)
{
  PQExpBuffer output_buf = state->output_buf;
  char     *cmd = output_buf->data + backtick_start_offset;
  PQExpBufferData cmd_output;
  FILE     *fd;
  bool    error = false;
  char    buf[512];
  size_t    result;

  initPQExpBuffer(&cmd_output);

  fd = popen(cmd, PG_BINARY_R);
  if (!fd)
  {
    state->callbacks->write_error("%s: %s\n", cmd, strerror(errno));
    error = true;
  }

  if (!error)
  {
    do
    {
      result = fread(buf, 1, sizeof(buf), fd);
      if (ferror(fd))
      {
        state->callbacks->write_error("%s: %s\n", cmd, strerror(errno));
        error = true;
        break;
      }
      appendBinaryPQExpBuffer(&cmd_output, buf, result);
    } while (!feof(fd));
  }

  if (fd && pclose(fd) == -1)
  {
    state->callbacks->write_error("%s: %s\n", cmd, strerror(errno));
    error = true;
  }

  if (PQExpBufferDataBroken(cmd_output))
  {
    state->callbacks->write_error("%s: out of memory\n", cmd);
    error = true;
  }

  /* Now done with cmd, delete it from output_buf */
  output_buf->len = backtick_start_offset;
  output_buf->data[output_buf->len] = '\0';

  /* If no error, transfer result to output_buf */
  if (!error)
  {
    /* strip any trailing newline */
    if (cmd_output.len > 0 &&
      cmd_output.data[cmd_output.len - 1] == '\n')
      cmd_output.len--;
    appendBinaryPQExpBuffer(output_buf, cmd_output.data, cmd_output.len);
  }

  termPQExpBuffer(&cmd_output);
}


YugabyteDB (2.13.1.0-b60, 21121d69985fbf76aa6958d8f04a9bfa936293b5)

Coverage Report

Created: 2022-03-22 16:43