LCOV - code coverage report
Current view: top level - src/backend/replication - syncrep_scanner.l (source / functions) Hit Total Coverage
Test: PostgreSQL 18devel Lines: 13 22 59.1 %
Date: 2024-07-18 16:11:39 Functions: 2 4 50.0 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : %top{
       2             : /*-------------------------------------------------------------------------
       3             :  *
       4             :  * syncrep_scanner.l
       5             :  *    a lexical scanner for synchronous_standby_names
       6             :  *
       7             :  * Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
       8             :  * Portions Copyright (c) 1994, Regents of the University of California
       9             :  *
      10             :  *
      11             :  * IDENTIFICATION
      12             :  *    src/backend/replication/syncrep_scanner.l
      13             :  *
      14             :  *-------------------------------------------------------------------------
      15             :  */
      16             : #include "postgres.h"
      17             : 
      18             : #include "lib/stringinfo.h"
      19             : #include "nodes/pg_list.h"
      20             : 
      21             : /*
      22             :  * NB: include syncrep_gram.h only AFTER including syncrep.h, because syncrep.h
      23             :  * includes node definitions needed for YYSTYPE.
      24             :  */
      25             : #include "replication/syncrep.h"
      26             : #include "syncrep_gram.h"
      27             : }
      28             : 
      29             : %{
      30             : /* Avoid exit() on fatal scanner errors (a bit ugly -- see yy_fatal_error) */
      31             : #undef fprintf
      32             : #define fprintf(file, fmt, msg)  fprintf_to_ereport(fmt, msg)
      33             : 
      34             : static void
      35           0 : fprintf_to_ereport(const char *fmt, const char *msg)
      36             : {
      37           0 :     ereport(ERROR, (errmsg_internal("%s", msg)));
      38             : }
      39             : 
      40             : /* Handles to the buffer that the lexer uses internally */
      41             : static YY_BUFFER_STATE scanbufhandle;
      42             : 
      43             : static StringInfoData xdbuf;
      44             : 
      45             : /* LCOV_EXCL_START */
      46             : 
      47             : %}
      48             : 
      49             : %option 8bit
      50             : %option never-interactive
      51             : %option nodefault
      52             : %option noinput
      53             : %option nounput
      54             : %option noyywrap
      55             : %option warn
      56             : %option prefix="syncrep_yy"
      57             : 
      58             : /*
      59             :  * <xd> delimited identifiers (double-quoted identifiers)
      60             :  */
      61             : %x xd
      62             : 
      63             : space           [ \t\n\r\f\v]
      64             : 
      65             : digit           [0-9]
      66             : ident_start     [A-Za-z\200-\377_]
      67             : ident_cont      [A-Za-z\200-\377_0-9\$]
      68             : identifier      {ident_start}{ident_cont}*
      69             : 
      70             : dquote          \"
      71             : xdstart         {dquote}
      72             : xdstop          {dquote}
      73             : xddouble        {dquote}{dquote}
      74             : xdinside        [^"]+
      75             : 
      76             : %%
      77             : {space}+    { /* ignore */ }
      78             : 
      79             :     /* brute-force case insensitivity is safer than relying on flex -i */
      80             : 
      81             : [Aa][Nn][Yy]            { return ANY; }
      82             : [Ff][Ii][Rr][Ss][Tt]    { return FIRST; }
      83             : 
      84             : {xdstart}   {
      85             :                 initStringInfo(&xdbuf);
      86             :                 BEGIN(xd);
      87             :         }
      88             : <xd>{xddouble} {
      89             :                 appendStringInfoChar(&xdbuf, '"');
      90             :         }
      91             : <xd>{xdinside} {
      92             :                 appendStringInfoString(&xdbuf, yytext);
      93             :         }
      94             : <xd>{xdstop} {
      95             :                 syncrep_yylval.str = xdbuf.data;
      96             :                 xdbuf.data = NULL;
      97             :                 BEGIN(INITIAL);
      98             :                 return NAME;
      99             :         }
     100             : <xd><<EOF>> {
     101             :                 syncrep_yyerror("unterminated quoted identifier");
     102             :                 return JUNK;
     103             :         }
     104             : 
     105             : {identifier} {
     106             :                 syncrep_yylval.str = pstrdup(yytext);
     107             :                 return NAME;
     108             :         }
     109             : 
     110             : {digit}+    {
     111             :                 syncrep_yylval.str = pstrdup(yytext);
     112             :                 return NUM;
     113             :         }
     114             : 
     115             : "*"       {
     116             :                 syncrep_yylval.str = "*";
     117             :                 return NAME;
     118             :         }
     119             : 
     120             : ","           { return ','; }
     121             : "("           { return '('; }
     122             : ")"           { return ')'; }
     123             : 
     124             : .           { return JUNK; }
     125             : %%
     126             : 
     127             : /* LCOV_EXCL_STOP */
     128             : 
     129             : /* Needs to be here for access to yytext */
     130             : void
     131           0 : syncrep_yyerror(const char *message)
     132             : {
     133             :     /* report only the first error in a parse operation */
     134           0 :     if (syncrep_parse_error_msg)
     135           0 :         return;
     136           0 :     if (yytext[0])
     137           0 :         syncrep_parse_error_msg = psprintf("%s at or near \"%s\"",
     138             :                                            message, yytext);
     139             :     else
     140           0 :         syncrep_parse_error_msg = psprintf("%s at end of input",
     141             :                                            message);
     142             : }
     143             : 
     144             : void
     145         130 : syncrep_scanner_init(const char *str)
     146             : {
     147         130 :     Size        slen = strlen(str);
     148             :     char       *scanbuf;
     149             : 
     150             :     /*
     151             :      * Might be left over after ereport()
     152             :      */
     153         130 :     if (YY_CURRENT_BUFFER)
     154           0 :         yy_delete_buffer(YY_CURRENT_BUFFER);
     155             : 
     156             :     /*
     157             :      * Make a scan buffer with special termination needed by flex.
     158             :      */
     159         130 :     scanbuf = (char *) palloc(slen + 2);
     160         130 :     memcpy(scanbuf, str, slen);
     161         130 :     scanbuf[slen] = scanbuf[slen + 1] = YY_END_OF_BUFFER_CHAR;
     162         130 :     scanbufhandle = yy_scan_buffer(scanbuf, slen + 2);
     163             : 
     164             :     /* Make sure we start in proper state */
     165         130 :     BEGIN(INITIAL);
     166         130 : }
     167             : 
     168             : void
     169         130 : syncrep_scanner_finish(void)
     170             : {
     171         130 :     yy_delete_buffer(scanbufhandle);
     172         130 :     scanbufhandle = NULL;
     173         130 : }

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