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revise alt_color_spec() so digit count limits work

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nhmall
2024-04-13 13:06:38 -04:00
parent 86cb8dba60
commit f2d0dbcc09
1 changed files with 13 additions and 10 deletions
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23
src/coloratt.c
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@@ -1106,7 +1106,7 @@ alt_color_spec(const char *str)
const char *dp, *cp = str;
int32 cval = -1;
int dcount;
int dcount, dlimit = 6;
boolean hexescape = FALSE, octescape = FALSE;
dcount = 0; /* for decimal, octal, hexadecimal cases */
@@ -1120,33 +1120,36 @@ alt_color_spec(const char *str)
if (hexescape || octescape) {
cval = 0;
cp += 2;
if (octescape)
dlimit = 8;
} else if (*cp == '#' && cp[1]) {
hexescape = TRUE;
cval = 0;
cp += 1;
} else if (cp[1]) {
cval = 0;
dlimit = 8;
} else if (!cp[1]) {
if (strchr(dec, *cp) != 0) {
/* simple val, or nothing left for \ to escape */
cval = (*cp - '0');
}
dlimit = 1;
cp++;
}
while (*cp) {
if (!hexescape && !octescape && strchr(dec, *cp)) {
do {
cval = (cval * 10) + (*cp - '0');
} while (*++cp && strchr(dec, *cp) && ++dcount < 8);
cval = (cval * 10) + (*cp - '0');
} else if (octescape && strchr(oct, *cp)) {
do {
cval = (cval * 8) + (*cp - '0');
} while (*++cp && strchr(oct, *cp) && ++dcount < 8);
cval = (cval * 8) + (*cp - '0');
} else if (hexescape && (dp = strchr(hexdd, *cp)) != 0) {
do {
cval = (cval * 16) + ((int) (dp - hexdd) / 2);
} while (*++cp && (dp = strchr(hexdd, *cp)) != 0 && ++dcount < 6);
cval = (cval * 16) + ((int) (dp - hexdd) / 2);
}
++cp;
if (++dcount > dlimit) {
cval = -1;
break;
}
}
return cval;