mirror of https://github.com/brouhaha/dis6502.git
69 lines
1010 B
Plaintext
69 lines
1010 B
Plaintext
%{
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#undef ECHO
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#include "dis.h"
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int lineno = 0;
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char *strcpy();
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%}
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digit [0-9]
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hexdigit [0-9a-fA-F]
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alpha [a-zA-Z]
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alphanum [0-9a-zA-Z_]
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%%
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[ \t] { ; }
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[\n] { lineno++; return '\n'; }
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\.[Ee][Qq][Uu] { return EQ; }
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\.[Ee][Qq] { return EQ; }
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\.[Ll][Ii] { return LI; }
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\.[Tt][Rr][Aa][Cc][Ee] { return TSTART; }
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\.[Ss][Tt][Oo][Pp] { return TSTOP; }
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\.[Rr][Tt][Ss][Tt][Aa][Bb] { return TRTSTAB; }
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{digit}+ {
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(void)sscanf(yytext, "%d", &token.ival);
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return NUMBER;
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}
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\${hexdigit}+ {
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(void)sscanf(yytext+1, "%x", &token.ival);
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return NUMBER;
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}
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{alpha}{alphanum}* {
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token.sval = emalloc((unsigned) strlen(yytext)+1);
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(void)strcpy((char *)token.sval, (char *)yytext);
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return NAME;
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}
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\*.* {
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return COMMENT;
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}
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\;.* {
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return COMMENT;
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}
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. { return yytext[0]; }
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%%
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char *
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emalloc(n)
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unsigned n;
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{
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char *ptr, *malloc();
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if ((ptr = malloc(n)) == (char *) 0) {
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(void) fprintf(stderr,"out of core");
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exit(1);
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}
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return ptr;
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}
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