/Users/deen/code/yugabyte-db/build/debugcov-clang-dynamic-arm64-ninja/postgres_build/src/backend/utils/misc/guc-file.c

Source (jump to first uncovered line)
#line 1 "guc-file.c"

#line 3 "guc-file.c"

#define  YY_INT_ALIGNED short int

/* A lexical scanner generated by flex */

#define yy_create_buffer GUC_yy_create_buffer
#define yy_delete_buffer GUC_yy_delete_buffer
#define yy_flex_debug GUC_yy_flex_debug
#define yy_init_buffer GUC_yy_init_buffer
#define yy_flush_buffer GUC_yy_flush_buffer
#define yy_load_buffer_state GUC_yy_load_buffer_state
#define yy_switch_to_buffer GUC_yy_switch_to_buffer
#define yyin GUC_yyin
#define yyleng GUC_yyleng
#define yylex GUC_yylex
#define yylineno GUC_yylineno
#define yyout GUC_yyout
#define yyrestart GUC_yyrestart
#define yytext GUC_yytext
#define yywrap GUC_yywrap
#define yyalloc GUC_yyalloc
#define yyrealloc GUC_yyrealloc
#define yyfree GUC_yyfree

#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 GUC_yy_create_buffer

    #define yy_delete_buffer GUC_yy_delete_buffer

    #define yy_scan_buffer GUC_yy_scan_buffer

    #define yy_scan_string GUC_yy_scan_string

    #define yy_scan_bytes GUC_yy_scan_bytes

    #define yy_init_buffer GUC_yy_init_buffer

    #define yy_flush_buffer GUC_yy_flush_buffer

    #define yy_load_buffer_state GUC_yy_load_buffer_state

    #define yy_switch_to_buffer GUC_yy_switch_to_buffer

    #define yypush_buffer_state GUC_yypush_buffer_state

    #define yypop_buffer_state GUC_yypop_buffer_state

    #define yyensure_buffer_stack GUC_yyensure_buffer_stack

    #define yylex GUC_yylex

    #define yyrestart GUC_yyrestart

    #define yylex_init GUC_yylex_init

    #define yylex_init_extra GUC_yylex_init_extra

    #define yylex_destroy GUC_yylex_destroy

    #define yyget_debug GUC_yyget_debug

    #define yyset_debug GUC_yyset_debug

    #define yyget_extra GUC_yyget_extra

    #define yyset_extra GUC_yyset_extra

    #define yyget_in GUC_yyget_in

    #define yyset_in GUC_yyset_in

    #define yyget_out GUC_yyget_out

    #define yyset_out GUC_yyset_out

    #define yyget_leng GUC_yyget_leng

    #define yyget_text GUC_yyget_text

    #define yyget_lineno GUC_yyget_lineno

    #define yyset_lineno GUC_yyset_lineno

    #define yywrap GUC_yywrap

    #define yyalloc GUC_yyalloc

    #define yyrealloc GUC_yyrealloc

    #define yyfree GUC_yyfree

    #define yytext GUC_yytext

    #define yyleng GUC_yyleng

    #define yyin GUC_yyin

    #define yyout GUC_yyout

    #define yy_flex_debug GUC_yy_flex_debug

    #define yylineno GUC_yylineno

/* 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))

/* 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 (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 (((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 GUC_yyrestart(GUC_yyin  )
#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

extern int GUC_yyleng;

extern FILE *GUC_yyin, *GUC_yyout;

#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 GUC_yytext. */ \
        int yyless_macro_arg = (n); \
        YY_LESS_LINENO(yyless_macro_arg);\
    *yy_cp = (yy_hold_char); \
    YY_RESTORE_YY_MORE_OFFSET \
    (yy_c_buf_p) = yy_cp = yy_bp + yyless_macro_arg - YY_MORE_ADJ; \
    YY_DO_BEFORE_ACTION; /* set up GUC_yytext again */ \
    } \
  while ( 0 )
#define unput(c) yyunput( c, (yytext_ptr)  )

#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 GUC_yyrestart()), so that the user can continue scanning by
   * just pointing GUC_yyin at a new input file.
   */
#define YY_BUFFER_EOF_PENDING 2

  };
#endif /* !YY_STRUCT_YY_BUFFER_STATE */

/* Stack of input buffers. */
static size_t yy_buffer_stack_top = 0; /**< index of top of stack. */
static size_t yy_buffer_stack_max = 0; /**< capacity of stack. */
static YY_BUFFER_STATE * yy_buffer_stack = NULL; /**< Stack as an array. */

/* 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 ( (yy_buffer_stack) \
                          ? (yy_buffer_stack)[(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 (yy_buffer_stack)[(yy_buffer_stack_top)]

/* yy_hold_char holds the character lost when GUC_yytext is formed. */
static char yy_hold_char;
static int yy_n_chars;    /* number of characters read into yy_ch_buf */
int GUC_yyleng;

/* Points to current character in buffer. */
static char *yy_c_buf_p = NULL;
static int yy_init = 0;   /* whether we need to initialize */
static int yy_start = 0;  /* start state number */

/* Flag which is used to allow GUC_yywrap()'s to do buffer switches
 * instead of setting up a fresh GUC_yyin.  A bit of a hack ...
 */
static int yy_did_buffer_switch_on_eof;

void GUC_yyrestart ( FILE *input_file  );
void GUC_yy_switch_to_buffer ( YY_BUFFER_STATE new_buffer  );
YY_BUFFER_STATE GUC_yy_create_buffer ( FILE *file, int size  );
void GUC_yy_delete_buffer ( YY_BUFFER_STATE b  );
void GUC_yy_flush_buffer ( YY_BUFFER_STATE b  );
void GUC_yypush_buffer_state ( YY_BUFFER_STATE new_buffer  );
void GUC_yypop_buffer_state ( void );

static void GUC_yyensure_buffer_stack ( void );
static void GUC_yy_load_buffer_state ( void );
static void GUC_yy_init_buffer ( YY_BUFFER_STATE b, FILE *file  );
#define YY_FLUSH_BUFFER GUC_yy_flush_buffer(YY_CURRENT_BUFFER )

YY_BUFFER_STATE GUC_yy_scan_buffer ( char *base, yy_size_t size  );
YY_BUFFER_STATE GUC_yy_scan_string ( const char *yy_str  );
YY_BUFFER_STATE GUC_yy_scan_bytes ( const char *bytes, int len  );

void *GUC_yyalloc ( yy_size_t  );
void *GUC_yyrealloc ( void *, yy_size_t  );
void GUC_yyfree ( void *  );

#define yy_new_buffer GUC_yy_create_buffer
#define yy_set_interactive(is_interactive) \
  { \
  if ( ! YY_CURRENT_BUFFER ){ \
        GUC_yyensure_buffer_stack (); \
    YY_CURRENT_BUFFER_LVALUE =    \
            GUC_yy_create_buffer(GUC_yyin,YY_BUF_SIZE ); \
  } \
  YY_CURRENT_BUFFER_LVALUE->yy_is_interactive = is_interactive; \
  }
#define yy_set_bol(at_bol) \
  { \
  if ( ! YY_CURRENT_BUFFER ){\
        GUC_yyensure_buffer_stack (); \
    YY_CURRENT_BUFFER_LVALUE =    \
            GUC_yy_create_buffer(GUC_yyin,YY_BUF_SIZE ); \
  } \
  YY_CURRENT_BUFFER_LVALUE->yy_at_bol = at_bol; \
  }
#define YY_AT_BOL() (YY_CURRENT_BUFFER_LVALUE->yy_at_bol)

/* Begin user sect3 */

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

FILE *GUC_yyin = NULL, *GUC_yyout = NULL;

typedef int yy_state_type;

extern int GUC_yylineno;
int GUC_yylineno = 1;

extern char *GUC_yytext;
#ifdef yytext_ptr
#undef yytext_ptr
#endif
#define yytext_ptr GUC_yytext

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

/* Done after the current pattern has been matched and before the
 * corresponding action - sets up GUC_yytext.
 */
#define YY_DO_BEFORE_ACTION \
  (yytext_ptr) = yy_bp; \
  GUC_yyleng = (int) (yy_cp - yy_bp); \
  (yy_hold_char) = *yy_cp; \
  *yy_cp = '\0'; \
  (yy_c_buf_p) = yy_cp;
#define YY_NUM_RULES 12
#define YY_END_OF_BUFFER 13
/* 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[41] =
    {   0,
        0,    0,   13,   11,    2,    1,    3,   11,   11,    9,
        8,    8,   10,    4,    2,    3,    0,    6,    0,    9,
        8,    8,    9,    0,    8,    8,    7,    7,    4,    4,
        0,    9,    8,    8,    7,    5,    5,    5,    5,    0
    } ;

static const YY_CHAR yy_ec[256] =
    {   0,
        1,    1,    1,    1,    1,    1,    1,    1,    2,    3,
        1,    1,    2,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    2,    1,    1,    4,    1,    1,    1,    5,    1,
        1,    1,    6,    1,    7,    8,    9,   10,   11,   11,
       11,   11,   11,   11,   11,   11,   11,    9,    1,    1,
       12,    1,    1,    1,   13,   13,   13,   13,   14,   13,
       15,   15,   15,   15,   15,   15,   15,   15,   15,   15,
       15,   15,   15,   15,   15,   15,   15,   15,   15,   15,
        1,   16,    1,    1,   17,    1,   13,   13,   13,   13,

       14,   13,   15,   15,   15,   15,   15,   15,   15,   15,
       15,   15,   15,   15,   15,   15,   15,   15,   15,   18,
       15,   15,    1,    1,    1,    1,    1,   19,   19,   19,
       19,   19,   19,   19,   19,   19,   19,   19,   19,   19,
       19,   19,   19,   19,   19,   19,   19,   19,   19,   19,
       19,   19,   19,   19,   19,   19,   19,   19,   19,   19,
       19,   19,   19,   19,   19,   19,   19,   19,   19,   19,
       19,   19,   19,   19,   19,   19,   19,   19,   19,   19,
       19,   19,   19,   19,   19,   19,   19,   19,   19,   19,
       19,   19,   19,   19,   19,   19,   19,   19,   19,   19,

       19,   19,   19,   19,   19,   19,   19,   19,   19,   19,
       19,   19,   19,   19,   19,   19,   19,   19,   19,   19,
       19,   19,   19,   19,   19,   19,   19,   19,   19,   19,
       19,   19,   19,   19,   19,   19,   19,   19,   19,   19,
       19,   19,   19,   19,   19,   19,   19,   19,   19,   19,
       19,   19,   19,   19,   19
    } ;

static const YY_CHAR yy_meta[20] =
    {   0,
        1,    1,    2,    1,    1,    1,    3,    3,    3,    4,
        4,    1,    5,    6,    5,    1,    3,    5,    3
    } ;

static const flex_int16_t yy_base[48] =
    {   0,
        0,    0,   50,  148,   43,  148,    0,   15,   24,   30,
       28,   22,  148,   40,   35,    0,   17,   25,    0,   15,
        0,   10,    0,   52,    0,   54,   10,   66,   79,    0,
       13,   15,    0,    0,    4,   90,  101,    0,    0,  148,
      118,  124,  127,  131,  133,  137,  141
    } ;

static const flex_int16_t yy_def[48] =
    {   0,
       40,    1,   40,   40,   40,   40,   41,   42,   40,   43,
       40,   11,   40,   44,   40,   41,   42,   40,   42,   43,
       11,   11,   20,   40,   45,   40,   46,   40,   44,   29,
       40,   40,   26,   26,   46,   47,   47,   37,   37,    0,
       40,   40,   40,   40,   40,   40,   40
    } ;

static const flex_int16_t yy_nxt[168] =
    {   0,
        4,    5,    6,    7,    8,    9,    9,   10,    4,   11,
       12,   13,   14,   14,   14,    4,   14,   14,   14,   18,
       35,   18,   32,   32,   32,   32,   35,   25,   24,   17,
       19,   20,   19,   21,   22,   20,   15,   22,   22,   25,
       25,   25,   25,   24,   15,   26,   27,   28,   27,   40,
       40,   40,   40,   40,   40,   40,   30,   31,   31,   40,
       40,   32,   32,   33,   33,   40,   34,   34,   25,   40,
       40,   25,   27,   27,   27,   27,   27,   40,   36,   36,
       36,   40,   37,   36,   36,   27,   28,   27,   40,   40,
       40,   40,   40,   40,   40,   30,   27,   27,   27,   40,

       40,   40,   40,   40,   40,   40,   39,   27,   27,   27,
       40,   40,   40,   40,   40,   40,   40,   39,   16,   40,
       16,   16,   16,   16,   17,   40,   17,   17,   17,   17,
       23,   40,   23,   29,   29,   29,   29,   25,   25,   27,
       27,   27,   27,   38,   38,   38,   38,    3,   40,   40,
       40,   40,   40,   40,   40,   40,   40,   40,   40,   40,
       40,   40,   40,   40,   40,   40,   40
    } ;

static const flex_int16_t yy_chk[168] =
    {   0,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    8,
       35,   17,   31,   31,   32,   32,   27,   22,   20,   18,
        8,    9,   17,    9,    9,   11,   15,   11,   11,   12,
       11,   11,   11,   10,    5,   11,   14,   14,   14,    3,
        0,    0,    0,    0,    0,    0,   14,   24,   24,    0,
        0,   24,   24,   26,   26,    0,   26,   26,   26,    0,
        0,   26,   28,   28,   28,   28,   28,    0,   28,   28,
       28,    0,   28,   28,   28,   29,   29,   29,    0,    0,
        0,    0,    0,    0,    0,   29,   36,   36,   36,    0,

        0,    0,    0,    0,    0,    0,   36,   37,   37,   37,
        0,    0,    0,    0,    0,    0,    0,   37,   41,    0,
       41,   41,   41,   41,   42,    0,   42,   42,   42,   42,
       43,    0,   43,   44,   44,   44,   44,   45,   45,   46,
       46,   46,   46,   47,   47,   47,   47,   40,   40,   40,
       40,   40,   40,   40,   40,   40,   40,   40,   40,   40,
       40,   40,   40,   40,   40,   40,   40
    } ;

static yy_state_type yy_last_accepting_state;
static char *yy_last_accepting_cpos;

extern int GUC_yy_flex_debug;
int GUC_yy_flex_debug = 0;

/* 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
char *GUC_yytext;
#line 1 "guc-file.l"
/* -*-pgsql-c-*- */
/*
 * Scanner for the configuration file
 *
 * Copyright (c) 2000-2018, PostgreSQL Global Development Group
 *
 * src/backend/utils/misc/guc-file.l
 */
#line 11 "guc-file.l"

#include "postgres.h"

#include <ctype.h>
#include <unistd.h>

#include "mb/pg_wchar.h"
#include "miscadmin.h"
#include "storage/fd.h"
#include "utils/guc.h"


/*
 * flex emits a yy_fatal_error() function that it calls in response to
 * critical errors like malloc failure, file I/O errors, and detection of
 * internal inconsistency.  That function prints a message and calls exit().
 * Mutate it to instead call our handler, which jumps out of the parser.
 */
#undef fprintf
#define fprintf(file, fmt, msg) GUC_flex_fatal(msg)

enum
{
  GUC_ID = 1,
  GUC_STRING = 2,
  GUC_INTEGER = 3,
  GUC_REAL = 4,
  GUC_EQUALS = 5,
  GUC_UNQUOTED_STRING = 6,
  GUC_QUALIFIED_ID = 7,
  GUC_EOL = 99,
  GUC_ERROR = 100
};

static unsigned int ConfigFileLineno;
static const char *GUC_flex_fatal_errmsg;
static sigjmp_buf *GUC_flex_fatal_jmp;

static void FreeConfigVariable(ConfigVariable *item);

static void record_config_file_error(const char *errmsg,
             const char *config_file,
             int lineno,
             ConfigVariable **head_p,
             ConfigVariable **tail_p);

static int  GUC_flex_fatal(const char *msg);
static char *GUC_scanstr(const char *s);

/* LCOV_EXCL_START */

#line 641 "guc-file.c"
#define YY_NO_INPUT 1
#line 643 "guc-file.c"

#define INITIAL 0

#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

static int yy_init_globals ( void );

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

int GUC_yylex_destroy ( void );

int GUC_yyget_debug ( void );

void GUC_yyset_debug ( int debug_flag  );

YY_EXTRA_TYPE GUC_yyget_extra ( void );

void GUC_yyset_extra ( YY_EXTRA_TYPE user_defined  );

FILE *GUC_yyget_in ( void );

void GUC_yyset_in  ( FILE * _in_str  );

FILE *GUC_yyget_out ( void );

void GUC_yyset_out  ( FILE * _out_str  );

      int GUC_yyget_leng ( void );

char *GUC_yyget_text ( void );

int GUC_yyget_lineno ( void );

void GUC_yyset_lineno ( int _line_number  );

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

#ifndef YY_SKIP_YYWRAP
#ifdef __cplusplus
extern "C" int GUC_yywrap ( void );
#else
extern int GUC_yywrap ( void );
#endif
#endif

#ifndef YY_NO_UNPUT
    
#endif

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

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

#ifndef YY_NO_INPUT
#ifdef __cplusplus
static int yyinput ( void );
#else
static int input ( void );
#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( GUC_yytext, (size_t) GUC_yyleng, 1, GUC_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( GUC_yyin )) != EOF && c != '\n'; ++n ) \
      buf[n] = (char) c; \
    if ( c == '\n' ) \
      buf[n++] = (char) c; \
    if ( c == EOF && ferror( GUC_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, GUC_yyin)) == 0 && ferror(GUC_yyin)) \
      { \
      if( errno != EINTR) \
        { \
        YY_FATAL_ERROR( "input in flex scanner failed" ); \
        break; \
        } \
      errno=0; \
      clearerr(GUC_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 )
#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 GUC_yylex (void);

#define YY_DECL int GUC_yylex (void)
#endif /* !YY_DECL */

/* Code executed at the beginning of each rule, after GUC_yytext and GUC_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;
    
  if ( !(yy_init) )
    {
    (yy_init) = 1;

#ifdef YY_USER_INIT
    YY_USER_INIT;
#endif

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

    if ( ! GUC_yyin )
      GUC_yyin = stdin;

    if ( ! GUC_yyout )
      GUC_yyout = stdout;

    if ( ! YY_CURRENT_BUFFER ) {
      GUC_yyensure_buffer_stack ();
      YY_CURRENT_BUFFER_LVALUE =
        GUC_yy_create_buffer(GUC_yyin,YY_BUF_SIZE );
    }

    GUC_yy_load_buffer_state( );
    }

  {
#line 94 "guc-file.l"


#line 861 "guc-file.c"

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

    /* Support of GUC_yytext. */
    *yy_cp = (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 = (yy_start);
yy_match:
    do
      {
      YY_CHAR yy_c = yy_ec[YY_SC_TO_UI(*yy_cp)] ;
      if ( yy_accept[yy_current_state] )
        {
        (yy_last_accepting_state) = yy_current_state;
        (yy_last_accepting_cpos) = yy_cp;
        }
      while ( yy_chk[yy_base[yy_current_state] + yy_c] != yy_current_state )
        {
        yy_current_state = (int) yy_def[yy_current_state];
        if ( yy_current_state >= 41 )
          yy_c = yy_meta[yy_c];
        }
      yy_current_state = yy_nxt[yy_base[yy_current_state] + yy_c];
      ++yy_cp;
      }
    while ( yy_current_state != 40 );
    yy_cp = (yy_last_accepting_cpos);
    yy_current_state = (yy_last_accepting_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 0: /* must back up */
      /* undo the effects of YY_DO_BEFORE_ACTION */
      *yy_cp = (yy_hold_char);
      yy_cp = (yy_last_accepting_cpos);
      yy_current_state = (yy_last_accepting_state);
      goto yy_find_action;

case 1:
/* rule 1 can match eol */
YY_RULE_SETUP
#line 96 "guc-file.l"
ConfigFileLineno++; return GUC_EOL;
  YY_BREAK
case 2:
YY_RULE_SETUP
#line 97 "guc-file.l"
/* eat whitespace */
  YY_BREAK
case 3:
YY_RULE_SETUP
#line 98 "guc-file.l"
/* eat comment (.* matches anything until newline) */
  YY_BREAK
case 4:
YY_RULE_SETUP
#line 100 "guc-file.l"
return GUC_ID;
  YY_BREAK
case 5:
YY_RULE_SETUP
#line 101 "guc-file.l"
return GUC_QUALIFIED_ID;
  YY_BREAK
case 6:
YY_RULE_SETUP
#line 102 "guc-file.l"
return GUC_STRING;
  YY_BREAK
case 7:
YY_RULE_SETUP
#line 103 "guc-file.l"
return GUC_UNQUOTED_STRING;
  YY_BREAK
case 8:
YY_RULE_SETUP
#line 104 "guc-file.l"
return GUC_INTEGER;
  YY_BREAK
case 9:
YY_RULE_SETUP
#line 105 "guc-file.l"
return GUC_REAL;
  YY_BREAK
case 10:
YY_RULE_SETUP
#line 106 "guc-file.l"
return GUC_EQUALS;
  YY_BREAK
case 11:
YY_RULE_SETUP
#line 108 "guc-file.l"
return GUC_ERROR;
  YY_BREAK
case 12:
YY_RULE_SETUP
#line 110 "guc-file.l"
YY_FATAL_ERROR( "flex scanner jammed" );
  YY_BREAK
#line 975 "guc-file.c"
case YY_STATE_EOF(INITIAL):
  yyterminate();

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

    /* Undo the effects of YY_DO_BEFORE_ACTION. */
    *yy_cp = (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 GUC_yyin at a new source and called
       * GUC_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.
       */
      (yy_n_chars) = YY_CURRENT_BUFFER_LVALUE->yy_n_chars;
      YY_CURRENT_BUFFER_LVALUE->yy_input_file = GUC_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 ( (yy_c_buf_p) <= &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[(yy_n_chars)] )
      { /* This was really a NUL. */
      yy_state_type yy_next_state;

      (yy_c_buf_p) = (yytext_ptr) + yy_amount_of_matched_text;

      yy_current_state = yy_get_previous_state(  );

      /* 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 );

      yy_bp = (yytext_ptr) + YY_MORE_ADJ;

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

      else
        {
        yy_cp = (yy_last_accepting_cpos);
        yy_current_state = (yy_last_accepting_state);
        goto yy_find_action;
        }
      }

    else switch ( yy_get_next_buffer(  ) )
      {
      case EOB_ACT_END_OF_FILE:
        {
        (yy_did_buffer_switch_on_eof) = 0;

        if ( GUC_yywrap( ) )
          {
          /* Note: because we've taken care in
           * yy_get_next_buffer() to have set up
           * GUC_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.
           */
          (yy_c_buf_p) = (yytext_ptr) + YY_MORE_ADJ;

          yy_act = YY_STATE_EOF(YY_START);
          goto do_action;
          }

        else
          {
          if ( ! (yy_did_buffer_switch_on_eof) )
            YY_NEW_FILE;
          }
        break;
        }

      case EOB_ACT_CONTINUE_SCAN:
        (yy_c_buf_p) =
          (yytext_ptr) + yy_amount_of_matched_text;

        yy_current_state = yy_get_previous_state(  );

        yy_cp = (yy_c_buf_p);
        yy_bp = (yytext_ptr) + YY_MORE_ADJ;
        goto yy_match;

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

        yy_current_state = yy_get_previous_state(  );

        yy_cp = (yy_c_buf_p);
        yy_bp = (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 GUC_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 (void)
{
      char *dest = YY_CURRENT_BUFFER_LVALUE->yy_ch_buf;
  char *source = (yytext_ptr);
  int number_to_move, i;
  int ret_val;

  if ( (yy_c_buf_p) > &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[(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 ( (yy_c_buf_p) - (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) ((yy_c_buf_p) - (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 = (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) ((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. */
          GUC_yyrealloc((void *) b->yy_ch_buf,(yy_size_t) (b->yy_buf_size + 2)  );
        }
      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" );

      (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]),
      (yy_n_chars), num_to_read );

    YY_CURRENT_BUFFER_LVALUE->yy_n_chars = (yy_n_chars);
    }

  if ( (yy_n_chars) == 0 )
    {
    if ( number_to_move == YY_MORE_ADJ )
      {
      ret_val = EOB_ACT_END_OF_FILE;
      GUC_yyrestart(GUC_yyin  );
      }

    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 (((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 = (yy_n_chars) + number_to_move + ((yy_n_chars) >> 1);
    YY_CURRENT_BUFFER_LVALUE->yy_ch_buf = (char *) GUC_yyrealloc((void *) YY_CURRENT_BUFFER_LVALUE->yy_ch_buf,(yy_size_t) new_size  );
    if ( ! YY_CURRENT_BUFFER_LVALUE->yy_ch_buf )
      YY_FATAL_ERROR( "out of dynamic memory in yy_get_next_buffer()" );
  }

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

  (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 (void)
{
  yy_state_type yy_current_state;
  char *yy_cp;
    
  yy_current_state = (yy_start);

  for ( yy_cp = (yytext_ptr) + YY_MORE_ADJ; yy_cp < (yy_c_buf_p); ++yy_cp )
    {
    YY_CHAR yy_c = (*yy_cp ? yy_ec[YY_SC_TO_UI(*yy_cp)] : 1);
    if ( yy_accept[yy_current_state] )
      {
      (yy_last_accepting_state) = yy_current_state;
      (yy_last_accepting_cpos) = yy_cp;
      }
    while ( yy_chk[yy_base[yy_current_state] + yy_c] != yy_current_state )
      {
      yy_current_state = (int) yy_def[yy_current_state];
      if ( yy_current_state >= 41 )
        yy_c = yy_meta[yy_c];
      }
    yy_current_state = yy_nxt[yy_base[yy_current_state] + yy_c];
    }

  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 )
{
  int yy_is_jam;
      char *yy_cp = (yy_c_buf_p);

  YY_CHAR yy_c = 1;
  if ( yy_accept[yy_current_state] )
    {
    (yy_last_accepting_state) = yy_current_state;
    (yy_last_accepting_cpos) = yy_cp;
    }
  while ( yy_chk[yy_base[yy_current_state] + yy_c] != yy_current_state )
    {
    yy_current_state = (int) yy_def[yy_current_state];
    if ( yy_current_state >= 41 )
      yy_c = yy_meta[yy_c];
    }
  yy_current_state = yy_nxt[yy_base[yy_current_state] + yy_c];
  yy_is_jam = (yy_current_state == 40);

    return yy_is_jam ? 0 : yy_current_state;
}

#ifndef YY_NO_UNPUT

#endif

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

{
  int c;
    
  *(yy_c_buf_p) = (yy_hold_char);

  if ( *(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 ( (yy_c_buf_p) < &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[(yy_n_chars)] )
      /* This was really a NUL. */
      *(yy_c_buf_p) = '\0';

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

      switch ( yy_get_next_buffer(  ) )
        {
        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. */
          GUC_yyrestart(GUC_yyin );

          /*FALLTHROUGH*/

        case EOB_ACT_END_OF_FILE:
          {
          if ( GUC_yywrap( ) )
            return 0;

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

        case EOB_ACT_CONTINUE_SCAN:
          (yy_c_buf_p) = (yytext_ptr) + offset;
          break;
        }
      }
    }

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

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

/** Immediately switch to a different input stream.
 * @param input_file A readable stream.
 * 
 * @note This function does not reset the start condition to @c INITIAL .
 */
    void GUC_yyrestart  (FILE * input_file )
{
    
  if ( ! YY_CURRENT_BUFFER ){
        GUC_yyensure_buffer_stack ();
    YY_CURRENT_BUFFER_LVALUE =
            GUC_yy_create_buffer(GUC_yyin,YY_BUF_SIZE );
  }

  GUC_yy_init_buffer(YY_CURRENT_BUFFER,input_file );
  GUC_yy_load_buffer_state( );
}

/** Switch to a different input buffer.
 * @param new_buffer The new input buffer.
 * 
 */
    void GUC_yy_switch_to_buffer  (YY_BUFFER_STATE  new_buffer )
{
    
  /* TODO. We should be able to replace this entire function body
   * with
   *    GUC_yypop_buffer_state();
   *    GUC_yypush_buffer_state(new_buffer);
     */
  GUC_yyensure_buffer_stack ();
  if ( YY_CURRENT_BUFFER == new_buffer )
    return;

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

  YY_CURRENT_BUFFER_LVALUE = new_buffer;
  GUC_yy_load_buffer_state( );

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

static void GUC_yy_load_buffer_state  (void)
{
      (yy_n_chars) = YY_CURRENT_BUFFER_LVALUE->yy_n_chars;
  (yytext_ptr) = (yy_c_buf_p) = YY_CURRENT_BUFFER_LVALUE->yy_buf_pos;
  GUC_yyin = YY_CURRENT_BUFFER_LVALUE->yy_input_file;
  (yy_hold_char) = *(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.
 * 
 * @return the allocated buffer state.
 */
    YY_BUFFER_STATE GUC_yy_create_buffer  (FILE * file, int  size )
{
  YY_BUFFER_STATE b;
    
  b = (YY_BUFFER_STATE) GUC_yyalloc(sizeof( struct yy_buffer_state )  );
  if ( ! b )
    YY_FATAL_ERROR( "out of dynamic memory in GUC_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 *) GUC_yyalloc((yy_size_t) (b->yy_buf_size + 2)  );
  if ( ! b->yy_ch_buf )
    YY_FATAL_ERROR( "out of dynamic memory in GUC_yy_create_buffer()" );

  b->yy_is_our_buffer = 1;

  GUC_yy_init_buffer(b,file );

  return b;
}

/** Destroy the buffer.
 * @param b a buffer created with GUC_yy_create_buffer()
 * 
 */
    void GUC_yy_delete_buffer (YY_BUFFER_STATE  b )
{
    
  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 )
    GUC_yyfree((void *) b->yy_ch_buf  );

  GUC_yyfree((void *) b  );
}

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

{
  int oerrno = errno;
    
  GUC_yy_flush_buffer(b );

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

    /* If b is the current buffer, then GUC_yy_init_buffer was _probably_
     * called from GUC_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.
 * 
 */
    void GUC_yy_flush_buffer (YY_BUFFER_STATE  b )
{
      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 )
    GUC_yy_load_buffer_state( );
}

/** 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.
 *  
 */
void GUC_yypush_buffer_state (YY_BUFFER_STATE new_buffer )
{
      if (new_buffer == NULL)
    return;

  GUC_yyensure_buffer_stack();

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

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

  /* copied from GUC_yy_switch_to_buffer. */
  GUC_yy_load_buffer_state( );
  (yy_did_buffer_switch_on_eof) = 1;
}

/** Removes and deletes the top of the stack, if present.
 *  The next element becomes the new top.
 *  
 */
void GUC_yypop_buffer_state (void)
{
      if (!YY_CURRENT_BUFFER)
    return;

  GUC_yy_delete_buffer(YY_CURRENT_BUFFER );
  YY_CURRENT_BUFFER_LVALUE = NULL;
  if ((yy_buffer_stack_top) > 0)
    --(yy_buffer_stack_top);

  if (YY_CURRENT_BUFFER) {
    GUC_yy_load_buffer_state( );
    (yy_did_buffer_switch_on_eof) = 1;
  }
}

/* Allocates the stack if it does not exist.
 *  Guarantees space for at least one push.
 */
static void GUC_yyensure_buffer_stack (void)
{
  yy_size_t num_to_alloc;
    
  if (!(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... */
    (yy_buffer_stack) = (struct yy_buffer_state**)GUC_yyalloc
                (num_to_alloc * sizeof(struct yy_buffer_state*)
                );
    if ( ! (yy_buffer_stack) )
      YY_FATAL_ERROR( "out of dynamic memory in GUC_yyensure_buffer_stack()" );

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

    (yy_buffer_stack_max) = num_to_alloc;
    (yy_buffer_stack_top) = 0;
    return;
  }

  if ((yy_buffer_stack_top) >= ((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 = (yy_buffer_stack_max) + grow_size;
    (yy_buffer_stack) = (struct yy_buffer_state**)GUC_yyrealloc
                ((yy_buffer_stack),
                num_to_alloc * sizeof(struct yy_buffer_state*)
                );
    if ( ! (yy_buffer_stack) )
      YY_FATAL_ERROR( "out of dynamic memory in GUC_yyensure_buffer_stack()" );

    /* zero only the new slots.*/
    memset((yy_buffer_stack) + (yy_buffer_stack_max), 0, grow_size * sizeof(struct yy_buffer_state*));
    (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
 * 
 * @return the newly allocated buffer state object.
 */
YY_BUFFER_STATE GUC_yy_scan_buffer  (char * base, yy_size_t  size )
{
  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) GUC_yyalloc(sizeof( struct yy_buffer_state )  );
  if ( ! b )
    YY_FATAL_ERROR( "out of dynamic memory in GUC_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;

  GUC_yy_switch_to_buffer(b  );

  return b;
}

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

/** Setup the input buffer state to scan the given bytes. The next call to GUC_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.
 * 
 * @return the newly allocated buffer state object.
 */
YY_BUFFER_STATE GUC_yy_scan_bytes  (const char * yybytes, int  _yybytes_len )
{
  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 *) GUC_yyalloc(n  );
  if ( ! buf )
    YY_FATAL_ERROR( "out of dynamic memory in GUC_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 = GUC_yy_scan_buffer(buf,n );
  if ( ! b )
    YY_FATAL_ERROR( "bad buffer in GUC_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 )
{
      (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 GUC_yytext. */ \
        int yyless_macro_arg = (n); \
        YY_LESS_LINENO(yyless_macro_arg);\
    GUC_yytext[GUC_yyleng] = (yy_hold_char); \
    (yy_c_buf_p) = GUC_yytext + yyless_macro_arg; \
    (yy_hold_char) = *(yy_c_buf_p); \
    *(yy_c_buf_p) = '\0'; \
    GUC_yyleng = yyless_macro_arg; \
    } \
  while ( 0 )

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

/** Get the current line number.
 * 
 */
int GUC_yyget_lineno  (void)
{
    
    return GUC_yylineno;
}

/** Get the input stream.
 * 
 */
FILE *GUC_yyget_in  (void)
{
        return GUC_yyin;
}

/** Get the output stream.
 * 
 */
FILE *GUC_yyget_out  (void)
{
        return GUC_yyout;
}

/** Get the length of the current token.
 * 
 */
int GUC_yyget_leng  (void)
{
        return GUC_yyleng;
}

/** Get the current token.
 * 
 */

char *GUC_yyget_text  (void)
{
        return GUC_yytext;
}

/** Set the current line number.
 * @param _line_number line number
 * 
 */
void GUC_yyset_lineno (int  _line_number )
{
    
    GUC_yylineno = _line_number;
}

/** Set the input stream. This does not discard the current
 * input buffer.
 * @param _in_str A readable stream.
 * 
 * @see GUC_yy_switch_to_buffer
 */
void GUC_yyset_in (FILE *  _in_str )
{
        GUC_yyin = _in_str ;
}

void GUC_yyset_out (FILE *  _out_str )
{
        GUC_yyout = _out_str ;
}

int GUC_yyget_debug  (void)
{
        return GUC_yy_flex_debug;
}

void GUC_yyset_debug (int  _bdebug )
{
        GUC_yy_flex_debug = _bdebug ;
}

static int yy_init_globals (void)
{
        /* Initialization is the same as for the non-reentrant scanner.
     * This function is called from GUC_yylex_destroy(), so don't allocate here.
     */

    (yy_buffer_stack) = NULL;
    (yy_buffer_stack_top) = 0;
    (yy_buffer_stack_max) = 0;
    (yy_c_buf_p) = NULL;
    (yy_init) = 0;
    (yy_start) = 0;

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

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

/* GUC_yylex_destroy is for both reentrant and non-reentrant scanners. */
int GUC_yylex_destroy  (void)
{
    
    /* Pop the buffer stack, destroying each element. */
  while(YY_CURRENT_BUFFER){
    GUC_yy_delete_buffer(YY_CURRENT_BUFFER  );
    YY_CURRENT_BUFFER_LVALUE = NULL;
    GUC_yypop_buffer_state();
  }

  /* Destroy the stack itself. */
  GUC_yyfree((yy_buffer_stack) );
  (yy_buffer_stack) = NULL;

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

    return 0;
}

/*
 * Internal utility routines.
 */

#ifndef yytext_ptr
static void yy_flex_strncpy (char* s1, const char * s2, int n )
{
    
  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 )
{
  int n;
  for ( n = 0; s[n]; ++n )
    ;

  return n;
}
#endif

void *GUC_yyalloc (yy_size_t  size )
{
      return malloc(size);
}

void *GUC_yyrealloc  (void * ptr, yy_size_t  size )
{
    
  /* 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 GUC_yyfree (void * ptr )
{
      free( (char *) ptr ); /* see GUC_yyrealloc() for (char *) cast */
}

#define YYTABLES_NAME "yytables"

#line 110 "guc-file.l"


/* LCOV_EXCL_STOP */

/*
 * Exported function to read and process the configuration file. The
 * parameter indicates in what context the file is being read --- either
 * postmaster startup (including standalone-backend startup) or SIGHUP.
 * All options mentioned in the configuration file are set to new values.
 * If a hard error occurs, no values will be changed.  (There can also be
 * errors that prevent just one value from being changed.)
 */
void
ProcessConfigFile(GucContext context)
{
  int     elevel;
  MemoryContext config_cxt;
  MemoryContext caller_cxt;

  /*
   * Config files are processed on startup (by the postmaster only) and on
   * SIGHUP (by the postmaster and its children)
   */
  Assert((context == PGC_POSTMASTER && !IsUnderPostmaster) ||
       context == PGC_SIGHUP);

  /*
   * To avoid cluttering the log, only the postmaster bleats loudly about
   * problems with the config file.
   */
  elevel = IsUnderPostmaster ? DEBUG2 : LOG;

  /*
   * This function is usually called within a process-lifespan memory
   * context.  To ensure that any memory leaked during GUC processing does
   * not accumulate across repeated SIGHUP cycles, do the work in a private
   * context that we can free at exit.
   */
  config_cxt = AllocSetContextCreate(GetCurrentMemoryContext(),
                     "config file processing",
                     ALLOCSET_DEFAULT_SIZES);
  caller_cxt = MemoryContextSwitchTo(config_cxt);

  /*
   * Read and apply the config file.  We don't need to examine the result.
   */
  (void) ProcessConfigFileInternal(context, true, elevel);

  /* Clean up */
  MemoryContextSwitchTo(caller_cxt);
  MemoryContextDelete(config_cxt);
}

/*
 * This function handles both actual config file (re)loads and execution of
 * show_all_file_settings() (i.e., the pg_file_settings view).  In the latter
 * case we don't apply any of the settings, but we make all the usual validity
 * checks, and we return the ConfigVariable list so that it can be printed out
 * by show_all_file_settings().
 */
static ConfigVariable *
ProcessConfigFileInternal(GucContext context, bool applySettings, int elevel)
{
  bool    error = false;
  bool    applying = false;
  const char *ConfFileWithError;
  ConfigVariable *item,
         *head,
         *tail;
  int     i;

  /* Parse the main config file into a list of option names and values */
  ConfFileWithError = ConfigFileName;
  head = tail = NULL;

  if (!ParseConfigFile(ConfigFileName, true,
             NULL, 0, 0, elevel,
             &head, &tail))
  {
    /* Syntax error(s) detected in the file, so bail out */
    error = true;
    goto bail_out;
  }

  /*
   * Parse the PG_AUTOCONF_FILENAME file, if present, after the main file to
   * replace any parameters set by ALTER SYSTEM command.  Because this file
   * is in the data directory, we can't read it until the DataDir has been
   * set.
   */
  if (DataDir)
  {
    if (!ParseConfigFile(PG_AUTOCONF_FILENAME, false,
               NULL, 0, 0, elevel,
               &head, &tail))
    {
      /* Syntax error(s) detected in the file, so bail out */
      error = true;
      ConfFileWithError = PG_AUTOCONF_FILENAME;
      goto bail_out;
    }
  }
  else
  {
    /*
     * If DataDir is not set, the PG_AUTOCONF_FILENAME file cannot be
     * read.  In this case, we don't want to accept any settings but
     * data_directory from postgresql.conf, because they might be
     * overwritten with settings in the PG_AUTOCONF_FILENAME file which
     * will be read later. OTOH, since data_directory isn't allowed in the
     * PG_AUTOCONF_FILENAME file, it will never be overwritten later.
     */
    ConfigVariable *newlist = NULL;

    /*
     * Prune all items except the last "data_directory" from the list.
     */
    for (item = head; item; item = item->next)
    {
      if (!item->ignore &&
        strcmp(item->name, "data_directory") == 0)
        newlist = item;
    }

    if (newlist)
      newlist->next = NULL;
    head = tail = newlist;

    /*
     * Quick exit if data_directory is not present in file.
     *
     * We need not do any further processing, in particular we don't set
     * PgReloadTime; that will be set soon by subsequent full loading of
     * the config file.
     */
    if (head == NULL)
      goto bail_out;
  }

  /*
   * Mark all extant GUC variables as not present in the config file. We
   * need this so that we can tell below which ones have been removed from
   * the file since we last processed it.
   */
  for (i = 0; i < num_guc_variables; i++)
  {
    struct config_generic *gconf = guc_variables[i];

    gconf->status &= ~GUC_IS_IN_FILE;
  }

  /*
   * Check if all the supplied option names are valid, as an additional
   * quasi-syntactic check on the validity of the config file.  It is
   * important that the postmaster and all backends agree on the results of
   * this phase, else we will have strange inconsistencies about which
   * processes accept a config file update and which don't.  Hence, unknown
   * custom variable names have to be accepted without complaint.  For the
   * same reason, we don't attempt to validate the options' values here.
   *
   * In addition, the GUC_IS_IN_FILE flag is set on each existing GUC
   * variable mentioned in the file; and we detect duplicate entries in the
   * file and mark the earlier occurrences as ignorable.
   */
  for (item = head; item; item = item->next)
  {
    struct config_generic *record;

    /* Ignore anything already marked as ignorable */
    if (item->ignore)
      continue;

    /*
     * Try to find the variable; but do not create a custom placeholder if
     * it's not there already.
     */
    record = find_option(item->name, false, elevel);

    if (record)
    {
      /* If it's already marked, then this is a duplicate entry */
      if (record->status & GUC_IS_IN_FILE)
      {
        /*
         * Mark the earlier occurrence(s) as dead/ignorable.  We could
         * avoid the O(N^2) behavior here with some additional state,
         * but it seems unlikely to be worth the trouble.
         */
        ConfigVariable *pitem;

        for (pitem = head; pitem != item; pitem = pitem->next)
        {
          if (!pitem->ignore &&
            strcmp(pitem->name, item->name) == 0)
            pitem->ignore = true;
        }
      }
      /* Now mark it as present in file */
      record->status |= GUC_IS_IN_FILE;
    }
    else if (strchr(item->name, GUC_QUALIFIER_SEPARATOR) == NULL)
    {
      /* Invalid non-custom variable, so complain */
      ereport(elevel,
          (errcode(ERRCODE_UNDEFINED_OBJECT),
           errmsg("unrecognized configuration parameter \"%s\" in file \"%s\" line %u",
              item->name,
              item->filename, item->sourceline)));
      item->errmsg = pstrdup("unrecognized configuration parameter");
      error = true;
      ConfFileWithError = item->filename;
    }
  }

  /*
   * If we've detected any errors so far, we don't want to risk applying any
   * changes.
   */
  if (error)
    goto bail_out;

  /* Otherwise, set flag that we're beginning to apply changes */
  applying = true;

  /*
   * Check for variables having been removed from the config file, and
   * revert their reset values (and perhaps also effective values) to the
   * boot-time defaults.  If such a variable can't be changed after startup,
   * report that and continue.
   */
  for (i = 0; i < num_guc_variables; i++)
  {
    struct config_generic *gconf = guc_variables[i];
    GucStack   *stack;

    if (gconf->reset_source != PGC_S_FILE ||
      (gconf->status & GUC_IS_IN_FILE))
      continue;
    if (gconf->context < PGC_SIGHUP)
    {
      ereport(elevel,
          (errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
           errmsg("parameter \"%s\" cannot be changed without restarting the server",
              gconf->name)));
      record_config_file_error(psprintf("parameter \"%s\" cannot be changed without restarting the server",
                        gconf->name),
                   NULL, 0,
                   &head, &tail);
      error = true;
      continue;
    }

    /* No more to do if we're just doing show_all_file_settings() */
    if (!applySettings)
      continue;

    /*
     * Reset any "file" sources to "default", else set_config_option will
     * not override those settings.
     */
    if (gconf->reset_source == PGC_S_FILE)
      gconf->reset_source = PGC_S_DEFAULT;
    if (gconf->source == PGC_S_FILE)
      gconf->source = PGC_S_DEFAULT;
    for (stack = gconf->stack; stack; stack = stack->prev)
    {
      if (stack->source == PGC_S_FILE)
        stack->source = PGC_S_DEFAULT;
    }

    /* Now we can re-apply the wired-in default (i.e., the boot_val) */
    if (set_config_option(gconf->name, NULL,
                context, PGC_S_DEFAULT,
                GUC_ACTION_SET, true, 0, false) > 0)
    {
      /* Log the change if appropriate */
      if (context == PGC_SIGHUP)
        ereport(elevel,
            (errmsg("parameter \"%s\" removed from configuration file, reset to default",
                gconf->name)));
    }
  }

  /*
   * Restore any variables determined by environment variables or
   * dynamically-computed defaults.  This is a no-op except in the case
   * where one of these had been in the config file and is now removed.
   *
   * In particular, we *must not* do this during the postmaster's initial
   * loading of the file, since the timezone functions in particular should
   * be run only after initialization is complete.
   *
   * XXX this is an unmaintainable crock, because we have to know how to set
   * (or at least what to call to set) every variable that could potentially
   * have PGC_S_DYNAMIC_DEFAULT or PGC_S_ENV_VAR source. However, there's no
   * time to redesign it for 9.1.
   */
  if (context == PGC_SIGHUP && applySettings)
  {
    InitializeGUCOptionsFromEnvironment();
    pg_timezone_abbrev_initialize();
    /* this selects SQL_ASCII in processes not connected to a database */
    SetConfigOption("client_encoding", GetDatabaseEncodingName(),
            PGC_BACKEND, PGC_S_DYNAMIC_DEFAULT);
  }

  /*
   * Now apply the values from the config file.
   */
  for (item = head; item; item = item->next)
  {
    char     *pre_value = NULL;
    int     scres;

    /* Ignore anything marked as ignorable */
    if (item->ignore)
      continue;

    /* In SIGHUP cases in the postmaster, we want to report changes */
    if (context == PGC_SIGHUP && applySettings && !IsUnderPostmaster)
    {
      const char *preval = GetConfigOption(item->name, true, false);

      /* If option doesn't exist yet or is NULL, treat as empty string */
      if (!preval)
        preval = "";
      /* must dup, else might have dangling pointer below */
      pre_value = pstrdup(preval);
    }

    scres = set_config_option(item->name, item->value,
                  context, PGC_S_FILE,
                  GUC_ACTION_SET, applySettings, 0, false);
    if (scres > 0)
    {
      /* variable was updated, so log the change if appropriate */
      if (pre_value)
      {
        const char *post_value = GetConfigOption(item->name, true, false);

        if (!post_value)
          post_value = "";
        if (strcmp(pre_value, post_value) != 0)
          ereport(elevel,
              (errmsg("parameter \"%s\" changed to \"%s\"",
                  item->name, item->value)));
      }
      item->applied = true;
    }
    else if (scres == 0)
    {
      error = true;
      item->errmsg = pstrdup("setting could not be applied");
      ConfFileWithError = item->filename;
    }
    else
    {
      /* no error, but variable's active value was not changed */
      item->applied = true;
    }

    /*
     * We should update source location unless there was an error, since
     * even if the active value didn't change, the reset value might have.
     * (In the postmaster, there won't be a difference, but it does matter
     * in backends.)
     */
    if (scres != 0 && applySettings)
      set_config_sourcefile(item->name, item->filename,
                  item->sourceline);

    if (pre_value)
      pfree(pre_value);
  }

  /* Remember when we last successfully loaded the config file. */
  if (applySettings)
    PgReloadTime = GetCurrentTimestamp();

bail_out:
  if (error && applySettings)
  {
    /* During postmaster startup, any error is fatal */
    if (context == PGC_POSTMASTER)
      ereport(ERROR,
          (errcode(ERRCODE_CONFIG_FILE_ERROR),
           errmsg("configuration file \"%s\" contains errors",
              ConfFileWithError)));
    else if (applying)
      ereport(elevel,
          (errcode(ERRCODE_CONFIG_FILE_ERROR),
           errmsg("configuration file \"%s\" contains errors; unaffected changes were applied",
              ConfFileWithError)));
    else
      ereport(elevel,
          (errcode(ERRCODE_CONFIG_FILE_ERROR),
           errmsg("configuration file \"%s\" contains errors; no changes were applied",
              ConfFileWithError)));
  }

  /* Successful or otherwise, return the collected data list */
  return head;
}

/*
 * Given a configuration file or directory location that may be a relative
 * path, return an absolute one.  We consider the location to be relative to
 * the directory holding the calling file, or to DataDir if no calling file.
 */
static char *
AbsoluteConfigLocation(const char *location, const char *calling_file)
{
  char    abs_path[MAXPGPATH];

  if (is_absolute_path(location))
    return pstrdup(location);
  else
  {
    if (calling_file != NULL)
    {
      strlcpy(abs_path, calling_file, sizeof(abs_path));
      get_parent_directory(abs_path);
      join_path_components(abs_path, abs_path, location);
      canonicalize_path(abs_path);
    }
    else
    {
      AssertState(DataDir);
      join_path_components(abs_path, DataDir, location);
      canonicalize_path(abs_path);
    }
    return pstrdup(abs_path);
  }
}

/*
 * Read and parse a single configuration file.  This function recurses
 * to handle "include" directives.
 *
 * If "strict" is true, treat failure to open the config file as an error,
 * otherwise just skip the file.
 *
 * calling_file/calling_lineno identify the source of the request.
 * Pass NULL/0 if not recursing from an inclusion request.
 *
 * See ParseConfigFp for further details.  This one merely adds opening the
 * config file rather than working from a caller-supplied file descriptor,
 * and absolute-ifying the path name if necessary.
 */
bool
ParseConfigFile(const char *config_file, bool strict,
        const char *calling_file, int calling_lineno,
        int depth, int elevel,
        ConfigVariable **head_p,
        ConfigVariable **tail_p)
{
  char     *abs_path;
  bool    OK = true;
  FILE     *fp;

  /*
   * Reject too-deep include nesting depth.  This is just a safety check to
   * avoid dumping core due to stack overflow if an include file loops back
   * to itself.  The maximum nesting depth is pretty arbitrary.
   */
  if (depth > 10)
  {
    ereport(elevel,
        (errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
         errmsg("could not open configuration file \"%s\": maximum nesting depth exceeded",
            config_file)));
    record_config_file_error("nesting depth exceeded",
                 calling_file, calling_lineno,
                 head_p, tail_p);
    return false;
  }

  abs_path = AbsoluteConfigLocation(config_file, calling_file);
  fp = AllocateFile(abs_path, "r");
  if (!fp)
  {
    if (strict)
    {
      ereport(elevel,
          (errcode_for_file_access(),
           errmsg("could not open configuration file \"%s\": %m",
              abs_path)));
      record_config_file_error(psprintf("could not open file \"%s\"",
                        abs_path),
                   calling_file, calling_lineno,
                   head_p, tail_p);
      OK = false;
    }
    else
    {
      ereport(LOG,
          (errmsg("skipping missing configuration file \"%s\"",
              abs_path)));
    }
    goto cleanup;
  }

  OK = ParseConfigFp(fp, abs_path, depth, elevel, head_p, tail_p);

cleanup:
  if (fp)
    FreeFile(fp);
  pfree(abs_path);

  return OK;
}

/*
 * Capture an error message in the ConfigVariable list returned by
 * config file parsing.
 */
static void
record_config_file_error(const char *errmsg,
             const char *config_file,
             int lineno,
             ConfigVariable **head_p,
             ConfigVariable **tail_p)
{
  ConfigVariable *item;

  item = palloc(sizeof *item);
  item->name = NULL;
  item->value = NULL;
  item->errmsg = pstrdup(errmsg);
  item->filename = config_file ? pstrdup(config_file) : NULL;
  item->sourceline = lineno;
  item->ignore = true;
  item->applied = false;
  item->next = NULL;
  if (*head_p == NULL)
    *head_p = item;
  else
    (*tail_p)->next = item;
  *tail_p = item;
}

/*
 * Flex fatal errors bring us here.  Stash the error message and jump back to
 * ParseConfigFp().  Assume all msg arguments point to string constants; this
 * holds for flex 2.5.31 (earliest we support) and flex 2.5.35 (latest as of
 * this writing).  Otherwise, we would need to copy the message.
 *
 * We return "int" since this takes the place of calls to fprintf().
*/
static int
GUC_flex_fatal(const char *msg)
{
  GUC_flex_fatal_errmsg = msg;
  siglongjmp(*GUC_flex_fatal_jmp, 1);
  return 0;         /* keep compiler quiet */
}

/*
 * Read and parse a single configuration file.  This function recurses
 * to handle "include" directives.
 *
 * Input parameters:
 *  fp: file pointer from AllocateFile for the configuration file to parse
 *  config_file: absolute or relative path name of the configuration file
 *  depth: recursion depth (should be 0 in the outermost call)
 *  elevel: error logging level to use
 * Input/Output parameters:
 *  head_p, tail_p: head and tail of linked list of name/value pairs
 *
 * *head_p and *tail_p must be initialized, either to NULL or valid pointers
 * to a ConfigVariable list, before calling the outer recursion level.  Any
 * name-value pairs read from the input file(s) will be appended to the list.
 * Error reports will also be appended to the list, if elevel < ERROR.
 *
 * Returns TRUE if successful, FALSE if an error occurred.  The error has
 * already been ereport'd, it is only necessary for the caller to clean up
 * its own state and release the ConfigVariable list.
 *
 * Note: if elevel >= ERROR then an error will not return control to the
 * caller, so there is no need to check the return value in that case.
 *
 * Note: this function is used to parse not only postgresql.conf, but
 * various other configuration files that use the same "name = value"
 * syntax.  Hence, do not do anything here or in the subsidiary routines
 * ParseConfigFile/ParseConfigDirectory that assumes we are processing
 * GUCs specifically.
 */
bool
ParseConfigFp(FILE *fp, const char *config_file, int depth, int elevel,
        ConfigVariable **head_p, ConfigVariable **tail_p)
{
  volatile bool OK = true;
  unsigned int save_ConfigFileLineno = ConfigFileLineno;
  sigjmp_buf *save_GUC_flex_fatal_jmp = GUC_flex_fatal_jmp;
  sigjmp_buf  flex_fatal_jmp;
  volatile YY_BUFFER_STATE lex_buffer = NULL;
  int     errorcount;
  int     token;

  if (sigsetjmp(flex_fatal_jmp, 1) == 0)
    GUC_flex_fatal_jmp = &flex_fatal_jmp;
  else
  {
    /*
     * Regain control after a fatal, internal flex error.  It may have
     * corrupted parser state.  Consequently, abandon the file, but trust
     * that the state remains sane enough for yy_delete_buffer().
     */
    elog(elevel, "%s at file \"%s\" line %u",
       GUC_flex_fatal_errmsg, config_file, ConfigFileLineno);
    record_config_file_error(GUC_flex_fatal_errmsg,
                 config_file, ConfigFileLineno,
                 head_p, tail_p);
    OK = false;
    goto cleanup;
  }

  /*
   * Parse
   */
  ConfigFileLineno = 1;
  errorcount = 0;

  lex_buffer = yy_create_buffer(fp, YY_BUF_SIZE);
  yy_switch_to_buffer(lex_buffer);

  /* This loop iterates once per logical line */
  while ((token = yylex()))
  {
    char     *opt_name = NULL;
    char     *opt_value = NULL;
    ConfigVariable *item;

    if (token == GUC_EOL)  /* empty or comment line */
      continue;

    /* first token on line is option name */
    if (token != GUC_ID && token != GUC_QUALIFIED_ID)
      goto parse_error;
    opt_name = pstrdup(yytext);

    /* next we have an optional equal sign; discard if present */
    token = yylex();
    if (token == GUC_EQUALS)
      token = yylex();

    /* now we must have the option value */
    if (token != GUC_ID &&
      token != GUC_STRING &&
      token != GUC_INTEGER &&
      token != GUC_REAL &&
      token != GUC_UNQUOTED_STRING)
      goto parse_error;
    if (token == GUC_STRING)  /* strip quotes and escapes */
      opt_value = GUC_scanstr(yytext);
    else
      opt_value = pstrdup(yytext);

    /* now we'd like an end of line, or possibly EOF */
    token = yylex();
    if (token != GUC_EOL)
    {
      if (token != 0)
        goto parse_error;
      /* treat EOF like \n for line numbering purposes, cf bug 4752 */
      ConfigFileLineno++;
    }

    /* OK, process the option name and value */
    if (guc_name_compare(opt_name, "include_dir") == 0)
    {
      /*
       * An include_dir directive isn't a variable and should be
       * processed immediately.
       */
      if (!ParseConfigDirectory(opt_value,
                    config_file, ConfigFileLineno - 1,
                    depth + 1, elevel,
                    head_p, tail_p))
        OK = false;
      yy_switch_to_buffer(lex_buffer);
      pfree(opt_name);
      pfree(opt_value);
    }
    else if (guc_name_compare(opt_name, "include_if_exists") == 0)
    {
      /*
       * An include_if_exists directive isn't a variable and should be
       * processed immediately.
       */
      if (!ParseConfigFile(opt_value, false,
                 config_file, ConfigFileLineno - 1,
                 depth + 1, elevel,
                 head_p, tail_p))
        OK = false;
      yy_switch_to_buffer(lex_buffer);
      pfree(opt_name);
      pfree(opt_value);
    }
    else if (guc_name_compare(opt_name, "include") == 0)
    {
      /*
       * An include directive isn't a variable and should be processed
       * immediately.
       */
      if (!ParseConfigFile(opt_value, true,
                 config_file, ConfigFileLineno - 1,
                 depth + 1, elevel,
                 head_p, tail_p))
        OK = false;
      yy_switch_to_buffer(lex_buffer);
      pfree(opt_name);
      pfree(opt_value);
    }
    else
    {
      /* ordinary variable, append to list */
      item = palloc(sizeof *item);
      item->name = opt_name;
      item->value = opt_value;
      item->errmsg = NULL;
      item->filename = pstrdup(config_file);
      item->sourceline = ConfigFileLineno - 1;
      item->ignore = false;
      item->applied = false;
      item->next = NULL;
      if (*head_p == NULL)
        *head_p = item;
      else
        (*tail_p)->next = item;
      *tail_p = item;
    }

    /* break out of loop if read EOF, else loop for next line */
    if (token == 0)
      break;
    continue;

parse_error:
    /* release storage if we allocated any on this line */
    if (opt_name)
      pfree(opt_name);
    if (opt_value)
      pfree(opt_value);

    /* report the error */
    if (token == GUC_EOL || token == 0)
    {
      ereport(elevel,
          (errcode(ERRCODE_SYNTAX_ERROR),
        errmsg("syntax error in file \"%s\" line %u, near end of line",
           config_file, ConfigFileLineno - 1)));
      record_config_file_error("syntax error",
                   config_file, ConfigFileLineno - 1,
                   head_p, tail_p);
    }
    else
    {
      ereport(elevel,
          (errcode(ERRCODE_SYNTAX_ERROR),
       errmsg("syntax error in file \"%s\" line %u, near token \"%s\"",
          config_file, ConfigFileLineno, yytext)));
      record_config_file_error("syntax error",
                   config_file, ConfigFileLineno,
                   head_p, tail_p);
    }
    OK = false;
    errorcount++;

    /*
     * To avoid producing too much noise when fed a totally bogus file,
     * give up after 100 syntax errors per file (an arbitrary number).
     * Also, if we're only logging the errors at DEBUG level anyway, might
     * as well give up immediately.  (This prevents postmaster children
     * from bloating the logs with duplicate complaints.)
     */
    if (errorcount >= 100 || elevel <= DEBUG1)
    {
      ereport(elevel,
          (errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
         errmsg("too many syntax errors found, abandoning file \"%s\"",
            config_file)));
      break;
    }

    /* resync to next end-of-line or EOF */
    while (token != GUC_EOL && token != 0)
      token = yylex();
    /* break out of loop on EOF */
    if (token == 0)
      break;
  }

cleanup:
  yy_delete_buffer(lex_buffer);
  /* Each recursion level must save and restore these static variables. */
  ConfigFileLineno = save_ConfigFileLineno;
  GUC_flex_fatal_jmp = save_GUC_flex_fatal_jmp;
  return OK;
}

/*
 * Read and parse all config files in a subdirectory in alphabetical order
 *
 * includedir is the absolute or relative path to the subdirectory to scan.
 *
 * calling_file/calling_lineno identify the source of the request.
 * Pass NULL/0 if not recursing from an inclusion request.
 *
 * See ParseConfigFp for further details.
 */
bool
ParseConfigDirectory(const char *includedir,
           const char *calling_file, int calling_lineno,
           int depth, int elevel,
           ConfigVariable **head_p,
           ConfigVariable **tail_p)
{
  char     *directory;
  DIR      *d;
  struct dirent *de;
  char    **filenames;
  int     num_filenames;
  int     size_filenames;
  bool    status;

  directory = AbsoluteConfigLocation(includedir, calling_file);
  d = AllocateDir(directory);
  if (d == NULL)
  {
    ereport(elevel,
        (errcode_for_file_access(),
         errmsg("could not open configuration directory \"%s\": %m",
            directory)));
    record_config_file_error(psprintf("could not open directory \"%s\"",
                      directory),
                 calling_file, calling_lineno,
                 head_p, tail_p);
    status = false;
    goto cleanup;
  }

  /*
   * Read the directory and put the filenames in an array, so we can sort
   * them prior to processing the contents.
   */
  size_filenames = 32;
  filenames = (char **) palloc(size_filenames * sizeof(char *));
  num_filenames = 0;

  while ((de = ReadDir(d, directory)) != NULL)
  {
    struct stat st;
    char    filename[MAXPGPATH];

    /*
     * Only parse files with names ending in ".conf".  Explicitly reject
     * files starting with ".".  This excludes things like "." and "..",
     * as well as typical hidden files, backup files, and editor debris.
     */
    if (strlen(de->d_name) < 6)
      continue;
    if (de->d_name[0] == '.')
      continue;
    if (strcmp(de->d_name + strlen(de->d_name) - 5, ".conf") != 0)
      continue;

    join_path_components(filename, directory, de->d_name);
    canonicalize_path(filename);
    if (stat(filename, &st) == 0)
    {
      if (!S_ISDIR(st.st_mode))
      {
        /* Add file to array, increasing its size in blocks of 32 */
        if (num_filenames >= size_filenames)
        {
          size_filenames += 32;
          filenames = (char **) repalloc(filenames,
                      size_filenames * sizeof(char *));
        }
        filenames[num_filenames] = pstrdup(filename);
        num_filenames++;
      }
    }
    else
    {
      /*
       * stat does not care about permissions, so the most likely reason
       * a file can't be accessed now is if it was removed between the
       * directory listing and now.
       */
      ereport(elevel,
          (errcode_for_file_access(),
           errmsg("could not stat file \"%s\": %m",
              filename)));
      record_config_file_error(psprintf("could not stat file \"%s\"",
                        filename),
                   calling_file, calling_lineno,
                   head_p, tail_p);
      status = false;
      goto cleanup;
    }
  }

  if (num_filenames > 0)
  {
    int     i;

    qsort(filenames, num_filenames, sizeof(char *), pg_qsort_strcmp);
    for (i = 0; i < num_filenames; i++)
    {
      if (!ParseConfigFile(filenames[i], true,
                 calling_file, calling_lineno,
                 depth, elevel,
                 head_p, tail_p))
      {
        status = false;
        goto cleanup;
      }
    }
  }
  status = true;

cleanup:
  if (d)
    FreeDir(d);
  pfree(directory);
  return status;
}

/*
 * Free a list of ConfigVariables, including the names and the values
 */
void
FreeConfigVariables(ConfigVariable *list)
{
  ConfigVariable *item;

  item = list;
  while (item)
  {
    ConfigVariable *next = item->next;

    FreeConfigVariable(item);
    item = next;
  }
}

/*
 * Free a single ConfigVariable
 */
static void
FreeConfigVariable(ConfigVariable *item)
{
  if (item->name)
    pfree(item->name);
  if (item->value)
    pfree(item->value);
  if (item->errmsg)
    pfree(item->errmsg);
  if (item->filename)
    pfree(item->filename);
  pfree(item);
}


/*
 *    scanstr
 *
 * Strip the quotes surrounding the given string, and collapse any embedded
 * '' sequences and backslash escapes.
 *
 * the string returned is palloc'd and should eventually be pfree'd by the
 * caller.
 */
static char *
GUC_scanstr(const char *s)
{
  char     *newStr;
  int     len,
        i,
        j;

  Assert(s != NULL && s[0] == '\'');
  len = strlen(s);
  Assert(len >= 2);
  Assert(s[len - 1] == '\'');

  /* Skip the leading quote; we'll handle the trailing quote below */
  s++, len--;

  /* Since len still includes trailing quote, this is enough space */
  newStr = palloc(len);

  for (i = 0, j = 0; i < len; i++)
  {
    if (s[i] == '\\')
    {
      i++;
      switch (s[i])
      {
        case 'b':
          newStr[j] = '\b';
          break;
        case 'f':
          newStr[j] = '\f';
          break;
        case 'n':
          newStr[j] = '\n';
          break;
        case 'r':
          newStr[j] = '\r';
          break;
        case 't':
          newStr[j] = '\t';
          break;
        case '0':
        case '1':
        case '2':
        case '3':
        case '4':
        case '5':
        case '6':
        case '7':
          {
            int     k;
            long    octVal = 0;

            for (k = 0;
               s[i + k] >= '0' && s[i + k] <= '7' && k < 3;
               k++)
              octVal = (octVal << 3) + (s[i + k] - '0');
            i += k - 1;
            newStr[j] = ((char) octVal);
          }
          break;
        default:
          newStr[j] = s[i];
          break;
      }         /* switch */
    }
    else if (s[i] == '\'' && s[i + 1] == '\'')
    {
      /* doubled quote becomes just one quote */
      newStr[j] = s[++i];
    }
    else
      newStr[j] = s[i];
    j++;
  }

  /* We copied the ending quote to newStr, so replace with \0 */
  Assert(j > 0 && j <= len);
  newStr[--j] = '\0';

  return newStr;
}


YugabyteDB (2.13.0.0-b42, bfc6a6643e7399ac8a0e81d06a3ee6d6571b33ab)

Coverage Report

Created: 2022-03-09 17:30