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301de6a6f6
Trying to clean up the code a bit while we're working on these files for the reentrant scanner/pure parser patches. This cleanup only touches the code sections after the second '%%' in each file, via a manually-supervised and locally hacked up pgindent.
147 lines
3.0 KiB
Plaintext
147 lines
3.0 KiB
Plaintext
%top{
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/*
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* A scanner for EMP-style numeric ranges
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*/
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#include "postgres.h"
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#include "nodes/miscnodes.h"
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#include "segdata.h"
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#include "segparse.h" /* must be after segdata.h for SEG */
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}
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%{
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/* LCOV_EXCL_START */
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/* No reason to constrain amount of data slurped */
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#define YY_READ_BUF_SIZE 16777216
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/* Avoid exit() on fatal scanner errors (a bit ugly -- see yy_fatal_error) */
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#undef fprintf
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#define fprintf(file, fmt, msg) fprintf_to_ereport(fmt, msg)
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static void
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fprintf_to_ereport(const char *fmt, const char *msg)
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{
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ereport(ERROR, (errmsg_internal("%s", msg)));
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}
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%}
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%option reentrant
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%option bison-bridge
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%option 8bit
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%option never-interactive
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%option nodefault
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%option noinput
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%option nounput
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%option noyywrap
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%option noyyalloc
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%option noyyrealloc
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%option noyyfree
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%option warn
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%option prefix="seg_yy"
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range (\.\.)(\.)?
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plumin (\'\+\-\')|(\(\+\-)\)
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integer [+-]?[0-9]+
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real [+-]?[0-9]+\.[0-9]+
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float ({integer}|{real})([eE]{integer})?
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%%
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{range} yylval->text = yytext; return RANGE;
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{plumin} yylval->text = yytext; return PLUMIN;
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{float} yylval->text = yytext; return SEGFLOAT;
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\< yylval->text = "<"; return EXTENSION;
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\> yylval->text = ">"; return EXTENSION;
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\~ yylval->text = "~"; return EXTENSION;
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[ \t\n\r\f\v]+ /* discard spaces */
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. return yytext[0]; /* alert parser of the garbage */
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%%
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/* LCOV_EXCL_STOP */
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void
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seg_yyerror(SEG *result, struct Node *escontext, yyscan_t yyscanner, const char *message)
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{
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struct yyguts_t *yyg = (struct yyguts_t *) yyscanner; /* needed for yytext
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* macro */
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/* if we already reported an error, don't overwrite it */
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if (SOFT_ERROR_OCCURRED(escontext))
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return;
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if (*yytext == YY_END_OF_BUFFER_CHAR)
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{
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errsave(escontext,
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(errcode(ERRCODE_SYNTAX_ERROR),
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errmsg("bad seg representation"),
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/* translator: %s is typically "syntax error" */
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errdetail("%s at end of input", message)));
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}
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else
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{
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errsave(escontext,
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(errcode(ERRCODE_SYNTAX_ERROR),
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errmsg("bad seg representation"),
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/* translator: first %s is typically "syntax error" */
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errdetail("%s at or near \"%s\"", message, yytext)));
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}
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}
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/*
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* Called before any actual parsing is done
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*/
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void
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seg_scanner_init(const char *str, yyscan_t *yyscannerp)
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{
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yyscan_t yyscanner;
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if (yylex_init(yyscannerp) != 0)
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elog(ERROR, "yylex_init() failed: %m");
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yyscanner = *yyscannerp;
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yy_scan_string(str, yyscanner);
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}
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/*
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* Called after parsing is done to clean up after seg_scanner_init()
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*/
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void
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seg_scanner_finish(yyscan_t yyscanner)
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{
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yylex_destroy(yyscanner);
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}
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/*
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* Interface functions to make flex use palloc() instead of malloc().
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* It'd be better to make these static, but flex insists otherwise.
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*/
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void *
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yyalloc(yy_size_t size, yyscan_t yyscanner)
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{
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return palloc(size);
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}
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void *
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yyrealloc(void *ptr, yy_size_t size, yyscan_t yyscanner)
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{
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if (ptr)
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return repalloc(ptr, size);
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else
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return palloc(size);
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}
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void
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yyfree(void *ptr, yyscan_t yyscanner)
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{
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if (ptr)
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pfree(ptr);
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}
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