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70 lines
1.2 KiB
Plaintext
70 lines
1.2 KiB
Plaintext
%option noyywrap
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%{
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#include <stdio.h>
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#include "gram.tab.h"
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extern char *progname;
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extern int ParseError;
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extern FILE *rcfile;
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#undef yyin
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#define yyin rcfile
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extern int parse_keyword(char *);
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void fixup_string(char *, char *);
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#define YY_SKIP_YYWRAP
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%}
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%%
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\#[^\n]*\n { ; }
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\"([^"\n\\]|\\.|\\\n)*\" { fixup_string(yytext, yytext); yylval.ptr=yytext;
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return STRING; }
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[0-9]+ { yylval.num=atoi(yytext); return NUMBER; }
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[a-zA-Z]+ { int token = parse_keyword(yytext);
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if(token == ERRORTOKEN) {
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fprintf(stderr, "%s: ignoring unknown keyword: %s\n",
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progname, yytext);
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ParseError=1;
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} else
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return token;
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}
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\{ { return LEFTBRACE; }
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\} { return RIGHTBRACE; }
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[\r\n\t ] { ; }
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. { fprintf(stderr, "%s: illegal character \"%s\" ignored\n",
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progname, yytext);
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ParseError=1; }
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%%
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void fixup_string(char *src, char *dest)
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{
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src++;
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while(*src!='"')
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if((*dest++=*src++)=='\\')
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switch((dest[-1]=*src++)) {
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case 'n':
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dest[-1]='\n';
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break;
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case 'r':
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dest[-1]='\r';
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break;
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case 'a':
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dest[-1]='\a';
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break;
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case 'b':
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dest[-1]='\b';
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break;
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case 't':
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dest[-1]='\t';
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break;
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case 'e':
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dest[-1]='\033';
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break;
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}
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*dest='\0';
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}
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