commit 559bb554c944ed166e363e522e48a71e60e1922d
parent fd5e810e0858162a2b11229db4f17dca489c9d41
Author: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date: Fri, 15 Jul 2011 09:47:39 -0300
no more 'zungetc' (better not to read next char)
Diffstat:
M | llex.c | | | 38 | +++++++++++++++++++------------------- |
M | lzio.h | | | 4 | +--- |
2 files changed, 20 insertions(+), 22 deletions(-)
diff --git a/llex.c b/llex.c
@@ -1,5 +1,5 @@
/*
-** $Id: llex.c,v 2.53 2011/07/08 20:01:38 roberto Exp roberto $
+** $Id: llex.c,v 2.54 2011/07/15 12:30:41 roberto Exp roberto $
** Lexical Analyzer
** See Copyright Notice in lua.h
*/
@@ -320,7 +320,6 @@ static int readdecesc (LexState *ls) {
}
if (r > UCHAR_MAX)
escerror(ls, c, i, "decimal escape too large");
- zungetc(ls->z);
return r;
}
@@ -340,37 +339,38 @@ static void read_string (LexState *ls, int del, SemInfo *seminfo) {
int c; /* final character to be saved */
next(ls); /* do not save the `\' */
switch (ls->current) {
- case 'a': c = '\a'; break;
- case 'b': c = '\b'; break;
- case 'f': c = '\f'; break;
- case 'n': c = '\n'; break;
- case 'r': c = '\r'; break;
- case 't': c = '\t'; break;
- case 'v': c = '\v'; break;
- case 'x': c = readhexaesc(ls); break;
- case '\n':
- case '\r': save(ls, '\n'); inclinenumber(ls); continue;
- case '\\': case '\"': case '\'': c = ls->current; break;
- case EOZ: continue; /* will raise an error next loop */
+ case 'a': c = '\a'; goto read_save;
+ case 'b': c = '\b'; goto read_save;
+ case 'f': c = '\f'; goto read_save;
+ case 'n': c = '\n'; goto read_save;
+ case 'r': c = '\r'; goto read_save;
+ case 't': c = '\t'; goto read_save;
+ case 'v': c = '\v'; goto read_save;
+ case 'x': c = readhexaesc(ls); goto read_save;
+ case '\n': case '\r':
+ inclinenumber(ls); c = '\n'; goto only_save;
+ case '\\': case '\"': case '\'':
+ c = ls->current; goto read_save;
+ case EOZ: goto no_save; /* will raise an error next loop */
case 'z': { /* zap following span of spaces */
next(ls); /* skip the 'z' */
while (lisspace(ls->current)) {
if (currIsNewline(ls)) inclinenumber(ls);
else next(ls);
}
- continue; /* do not save 'c' */
+ goto no_save;
}
default: {
if (!lisdigit(ls->current))
escerror(ls, &ls->current, 1, "invalid escape sequence");
/* digital escape \ddd */
c = readdecesc(ls);
- break;
+ goto only_save;
}
}
- next(ls);
- save(ls, c);
- break;
+ read_save: next(ls); /* read next character */
+ only_save: save(ls, c); /* save 'c' */
+ no_save: break;
}
default:
save_and_next(ls);
diff --git a/lzio.h b/lzio.h
@@ -1,5 +1,5 @@
/*
-** $Id: lzio.h,v 1.24 2011/02/23 13:13:10 roberto Exp roberto $
+** $Id: lzio.h,v 1.25 2011/07/15 12:35:32 roberto Exp roberto $
** Buffered streams
** See Copyright Notice in lua.h
*/
@@ -19,8 +19,6 @@ typedef struct Zio ZIO;
#define zgetc(z) (((z)->n--)>0 ? cast_uchar(*(z)->p++) : luaZ_fill(z))
-#define zungetc(z) ((z)->n++, (z)->p--)
-
typedef struct Mbuffer {
char *buffer;