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added support for ugly tokens
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parent
98d9509676
commit
24c962de43
83
lex.c
83
lex.c
@ -1,5 +1,8 @@
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char *rcs_lex = "$Id: lex.c,v 2.3 1994/08/17 17:41:50 celes Exp celes $";
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char *rcs_lex = "$Id: lex.c,v 2.4 1994/09/05 19:14:40 celes Exp lhf $";
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/*$Log: lex.c,v $
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* Revision 2.4 1994/09/05 19:14:40 celes
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* escapes \' e \" em strings; correcao do escape \\
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*
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* Revision 2.3 1994/08/17 17:41:50 celes
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* Implementacao da macro 'lua_strcmp'
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*
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@ -33,7 +36,7 @@ char *rcs_lex = "$Id: lex.c,v 2.3 1994/08/17 17:41:50 celes Exp celes $";
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#include "table.h"
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#include "y.tab.h"
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#define lua_strcmp(a,b) (a[0]<b[0]?(-1):(a[0]>b[0]?(1):strcmp(a,b)))
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#define lua_strcmp(a,b) (a[0]<b[0]?(-1):(a[0]>b[0]?(1):strcmp(a,b)))
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#define next() { current = input(); }
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#define save(x) { *yytextLast++ = (x); }
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@ -60,7 +63,7 @@ char *lua_lasttext (void)
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/* The reserved words must be listed in lexicographic order */
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static struct
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static struct
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{
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char *name;
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int token;
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@ -82,6 +85,30 @@ static struct
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{"until", UNTIL},
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{"while", WHILE} };
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enum
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{
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U_and=128,
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U_do,
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U_else,
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U_elseif,
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U_end,
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U_function,
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U_if,
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U_local,
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U_nil,
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U_not,
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U_or,
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U_repeat,
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U_return,
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U_then,
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U_until,
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U_while,
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U_le = '<'+128,
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U_ge = '>'+128,
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U_ne = '~'+128,
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U_sc = '.'+128
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};
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#define RESERVEDSIZE (sizeof(reserved)/sizeof(reserved[0]))
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@ -134,23 +161,23 @@ int yylex ()
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return DEBUG;
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}
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return WRONGTOKEN;
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case '-':
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save_and_next();
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if (current != '-') return '-';
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do { next(); } while (current != '\n' && current != 0);
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continue;
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case '<':
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save_and_next();
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if (current != '=') return '<';
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else { save_and_next(); return LE; }
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case '>':
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save_and_next();
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if (current != '=') return '>';
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else { save_and_next(); return GE; }
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case '~':
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save_and_next();
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if (current != '=') return '~';
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@ -161,12 +188,12 @@ int yylex ()
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{
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int del = current;
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next(); /* skip the delimiter */
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while (current != del)
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while (current != del)
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{
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switch (current)
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{
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case 0:
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case '\n':
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case 0:
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case '\n':
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return WRONGTOKEN;
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case '\\':
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next(); /* do not save the '\' */
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@ -180,7 +207,7 @@ int yylex ()
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default : save(current); next(); break;
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}
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break;
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default:
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default:
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save_and_next();
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}
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}
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@ -212,12 +239,12 @@ int yylex ()
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yylval.pChar = yytext[currentText];
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return NAME;
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}
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case '.':
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save_and_next();
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if (current == '.')
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{
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save_and_next();
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if (current == '.')
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{
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save_and_next();
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return CONC;
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}
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else if (!isdigit(current)) return '.';
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@ -226,7 +253,7 @@ int yylex ()
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case '0': case '1': case '2': case '3': case '4':
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case '5': case '6': case '7': case '8': case '9':
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do { save_and_next(); } while (isdigit(current));
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if (current == '.') save_and_next();
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fraction: while (isdigit(current)) save_and_next();
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@ -241,12 +268,32 @@ fraction: while (isdigit(current)) save_and_next();
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yylval.vFloat = atof(yytext[currentText]);
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return NUMBER;
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case U_and: return AND;
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case U_do: return DO;
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case U_else: return ELSE;
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case U_elseif: return ELSEIF;
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case U_end: return END;
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case U_function: return FUNCTION;
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case U_if: return IF;
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case U_local: return LOCAL;
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case U_nil: return NIL;
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case U_not: return NOT;
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case U_or: return OR;
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case U_repeat: return REPEAT;
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case U_return: return RETURN;
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case U_then: return THEN;
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case U_until: return UNTIL;
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case U_while: return WHILE;
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case U_le: return LE;
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case U_ge: return GE;
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case U_ne: return NE;
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case U_sc: return CONC;
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default: /* also end of file */
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{
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save_and_next();
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return yytext[currentText][0];
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return yytext[currentText][0];
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}
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}
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}
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}
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