LCOV - code coverage report
Current view: top level - contrib/seg - segscan.l (source / functions) Hit Total Coverage
Test: PostgreSQL 13devel Lines: 19 19 100.0 %
Date: 2019-11-21 12:06:29 Functions: 3 3 100.0 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : %{
       2             : /*
       3             :  * A scanner for EMP-style numeric ranges
       4             :  */
       5             : 
       6             : /* LCOV_EXCL_START */
       7             : 
       8             : /* No reason to constrain amount of data slurped */
       9             : #define YY_READ_BUF_SIZE 16777216
      10             : 
      11             : /* Avoid exit() on fatal scanner errors (a bit ugly -- see yy_fatal_error) */
      12             : #undef fprintf
      13             : #define fprintf(file, fmt, msg)  fprintf_to_ereport(fmt, msg)
      14             : 
      15             : static void
      16             : fprintf_to_ereport(const char *fmt, const char *msg)
      17             : {
      18             :     ereport(ERROR, (errmsg_internal("%s", msg)));
      19             : }
      20             : 
      21             : /* Handles to the buffer that the lexer uses internally */
      22             : static YY_BUFFER_STATE scanbufhandle;
      23             : static char *scanbuf;
      24             : static int  scanbuflen;
      25             : %}
      26             : 
      27             : %option 8bit
      28             : %option never-interactive
      29             : %option nodefault
      30             : %option noinput
      31             : %option nounput
      32             : %option noyywrap
      33             : %option warn
      34             : %option prefix="seg_yy"
      35             : 
      36             : 
      37             : range        (\.\.)(\.)?
      38             : plumin       (\'\+\-\')|(\(\+\-)\)
      39             : integer      [+-]?[0-9]+
      40             : real         [+-]?[0-9]+\.[0-9]+
      41             : float        ({integer}|{real})([eE]{integer})?
      42             : 
      43             : %%
      44             : 
      45             : {range}      yylval.text = yytext; return RANGE;
      46             : {plumin}     yylval.text = yytext; return PLUMIN;
      47             : {float}      yylval.text = yytext; return SEGFLOAT;
      48             : \<           yylval.text = "<"; return EXTENSION;
      49             : \>           yylval.text = ">"; return EXTENSION;
      50             : \~           yylval.text = "~"; return EXTENSION;
      51             : [ \t\n\r\f]+ /* discard spaces */
      52             : .            return yytext[0]; /* alert parser of the garbage */
      53             : 
      54             : %%
      55             : 
      56             : /* LCOV_EXCL_STOP */
      57             : 
      58             : void
      59             : yyerror(SEG *result, const char *message)
      60          16 : {
      61             :     if (*yytext == YY_END_OF_BUFFER_CHAR)
      62          16 :     {
      63             :         ereport(ERROR,
      64           2 :                 (errcode(ERRCODE_SYNTAX_ERROR),
      65             :                  errmsg("bad seg representation"),
      66             :                  /* translator: %s is typically "syntax error" */
      67             :                  errdetail("%s at end of input", message)));
      68             :     }
      69             :     else
      70             :     {
      71             :         ereport(ERROR,
      72          14 :                 (errcode(ERRCODE_SYNTAX_ERROR),
      73             :                  errmsg("bad seg representation"),
      74             :                  /* translator: first %s is typically "syntax error" */
      75             :                  errdetail("%s at or near \"%s\"", message, yytext)));
      76             :     }
      77             : }
      78             : 
      79             : 
      80             : /*
      81             :  * Called before any actual parsing is done
      82             :  */
      83             : void
      84             : seg_scanner_init(const char *str)
      85        5620 : {
      86             :     Size    slen = strlen(str);
      87        5620 : 
      88             :     /*
      89             :      * Might be left over after ereport()
      90             :      */
      91             :     if (YY_CURRENT_BUFFER)
      92        5620 :         yy_delete_buffer(YY_CURRENT_BUFFER);
      93          18 : 
      94             :     /*
      95             :      * Make a scan buffer with special termination needed by flex.
      96             :      */
      97             :     scanbuflen = slen;
      98        5620 :     scanbuf = palloc(slen + 2);
      99        5620 :     memcpy(scanbuf, str, slen);
     100        5620 :     scanbuf[slen] = scanbuf[slen + 1] = YY_END_OF_BUFFER_CHAR;
     101        5620 :     scanbufhandle = yy_scan_buffer(scanbuf, slen + 2);
     102        5620 : 
     103             :     BEGIN(INITIAL);
     104        5620 : }
     105        5620 : 
     106             : 
     107             : /*
     108             :  * Called after parsing is done to clean up after seg_scanner_init()
     109             :  */
     110             : void
     111             : seg_scanner_finish(void)
     112        5602 : {
     113             :     yy_delete_buffer(scanbufhandle);
     114        5602 :     pfree(scanbuf);
     115        5602 : }

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