65 lines
1.2 KiB
C
65 lines
1.2 KiB
C
/************************************************************
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yysunput.c
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This file can be freely modified for the generation of
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custom code.
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Copyright (c) 1999 Bumble-Bee Software Ltd.
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************************************************************/
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#include <stdlib.h>
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#include <stdio.h>
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#include <ctype.h>
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#include <limits.h>
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#include "lex.h"
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#ifdef YYPROTOTYPE
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void YYCDECL yyunput(int ch)
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#else
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void YYCDECL yyunput(ch)
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int ch;
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#endif
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{
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yyassert(ch >= 0 && ch <= UCHAR_MAX || ch == EOF);
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yyassert(yyunputindex >= 0 && yyunputindex <= yyunput_size);
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/* check unput buffer size */
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if (yyunputindex == yyunput_size) {
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do {
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if (yyunputgrow) {
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if (yyunput_size != 0) {
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int size = yyunput_size * 2;
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if (size / 2 == yyunput_size) { /* overflow check */
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if (yysetunputsize(size)) {
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break;
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}
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}
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}
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else {
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if (yysetunputsize(100)) {
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break;
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}
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}
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}
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yyunputoverflow();
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exit(EXIT_FAILURE);
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}
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while (0);
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}
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yyunputbufptr[yyunputindex++] = ch;
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/* check line number */
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if (ch == '\n') {
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yylineno--;
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}
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/* debugging */
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#ifdef YYDEBUG
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if (yydebug || yylexdebug) {
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yylexdebugoutput("unput: \'");
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yydebugoutput(ch);
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yylexdebugoutput("\'\n");
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}
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#endif
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}
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