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4211673622
Flex generates a lot of functions that are not actually used. In order to avoid coverage figures being ruined by that, mark up the part of the .l files where the generated code appears by lcov exclusion markers. That way, lcov will typically only reported on coverage for the .l file, which is under our control, but not for the .c file. Reviewed-by: Michael Paquier <michael.paquier@gmail.com>
116 lines
2.5 KiB
Plaintext
116 lines
2.5 KiB
Plaintext
%{
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/*
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* A scanner for EMP-style numeric ranges
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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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/* Handles to the buffer that the lexer uses internally */
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static YY_BUFFER_STATE scanbufhandle;
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static char *scanbuf;
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static int scanbuflen;
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%}
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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 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]+ /* 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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yyerror(SEG *result, const char *message)
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{
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if (*yytext == YY_END_OF_BUFFER_CHAR)
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{
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ereport(ERROR,
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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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ereport(ERROR,
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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)
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{
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Size slen = strlen(str);
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/*
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* Might be left over after ereport()
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*/
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if (YY_CURRENT_BUFFER)
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yy_delete_buffer(YY_CURRENT_BUFFER);
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/*
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* Make a scan buffer with special termination needed by flex.
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*/
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scanbuflen = slen;
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scanbuf = palloc(slen + 2);
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memcpy(scanbuf, str, slen);
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scanbuf[slen] = scanbuf[slen + 1] = YY_END_OF_BUFFER_CHAR;
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scanbufhandle = yy_scan_buffer(scanbuf, slen + 2);
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BEGIN(INITIAL);
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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(void)
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{
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yy_delete_buffer(scanbufhandle);
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pfree(scanbuf);
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}
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