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SVN=121622
This commit is contained in:
Ken Thompson 2008-06-08 19:02:27 -07:00
parent 9abf9e8a37
commit f9c58c25e0
2 changed files with 16 additions and 11 deletions
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2
src/cmd/gc/go.h
View File

@ -387,7 +387,7 @@ void lexinit(void);
char* lexname(int);
long getr(void);
int getnsc(void);
int escchar(int, vlong*);
int escchar(int, int*, vlong*);
int getc(void);
void ungetc(int);
void mkpackage(char*);

25
src/cmd/gc/lex.c
View File

@ -175,6 +175,7 @@ yylex(void)
vlong v;
char *cp;
Rune rune;
int escflag;
Sym *s;
l0:
@ -224,19 +225,19 @@ l0:
caseq:
for(;;) {
if(escchar('"', &v))
if(escchar('"', &escflag, &v))
break;
if(v >= Runeself) {
if(escflag || v < Runeself) {
cp = remal(cp, c1, 1);
cp[c1++] = v;
} else {
// botch - this limits size of runes
rune = v;
c = runelen(rune);
cp = remal(cp, c1, c);
runetochar(cp+c1, &rune);
c1 += c;
continue;
}
cp = remal(cp, c1, 1);
cp[c1++] = v;
}
goto catem;
@ -281,9 +282,9 @@ l0:
case '\'':
/* '.' */
if(escchar('\'', &v))
if(escchar('\'', &escflag, &v))
v = '\''; // allow '''
if(!escchar('\'', &v)) {
if(!escchar('\'', &escflag, &v)) {
yyerror("missing '");
ungetc(v);
}
@ -695,12 +696,13 @@ getnsc(void)
int
escchar(int e, vlong *val)
escchar(int e, int *escflg, vlong *val)
{
int i;
long c;
int i, c;
vlong l;
*escflg = 0;
loop:
c = getr();
if(c == '\n') {
@ -720,6 +722,7 @@ loop:
goto loop;
case 'x':
*escflg = 1; // it's a byte
i = 2;
goto hex;
@ -739,6 +742,7 @@ loop:
case '5':
case '6':
case '7':
*escflg = 1; // it's a byte
goto oct;
case 'a': c = '\a'; break;
@ -793,6 +797,7 @@ oct:
}
if(l > 255)
warn("oct escape value > 255: %d", l);
*val = l;
return 0;
}