DrSocalkwe3n/luajit
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Merge branch 'master' into v2.1

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This commit is contained in:
Mike Pall
2022-01-13 17:51:09 +01:00
parent a91d0d9d3b e560487536
commit 4ccaf348fb
3 changed files with 25 additions and 9 deletions
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13
src/lj_strscan.c
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@@ -63,6 +63,7 @@
#define STRSCAN_MAXDIG 800 /* 772 + extra are sufficient. */
#define STRSCAN_DDIG (STRSCAN_DIG/2)
#define STRSCAN_DMASK (STRSCAN_DDIG-1)
#define STRSCAN_MAXEXP (1 << 20)
/* Helpers for circular buffer. */
#define DNEXT(a) (((a)+1) & STRSCAN_DMASK)
@@ -121,7 +122,8 @@ static StrScanFmt strscan_hex(const uint8_t *p, TValue *o,
/* Format-specific handling. */
switch (fmt) {
case STRSCAN_INT:
if (!(opt & STRSCAN_OPT_TONUM) && x < 0x80000000u+neg) {
if (!(opt & STRSCAN_OPT_TONUM) && x < 0x80000000u+neg &&
!(x == 0 && neg)) {
o->i = neg ? -(int32_t)x : (int32_t)x;
return STRSCAN_INT; /* Fast path for 32 bit integers. */
}
@@ -448,6 +450,7 @@ StrScanFmt lj_strscan_scan(const uint8_t *p, MSize len, TValue *o,
if (dig) {
ex = (int32_t)(dp-(p-1)); dp = p-1;
while (ex < 0 && *dp-- == '0') ex++, dig--; /* Skip trailing zeros. */
if (ex <= -STRSCAN_MAXEXP) return STRSCAN_ERROR;
if (base == 16) ex *= 4;
}
}
@@ -461,7 +464,8 @@ StrScanFmt lj_strscan_scan(const uint8_t *p, MSize len, TValue *o,
if (!lj_char_isdigit(*p)) return STRSCAN_ERROR;
xx = (*p++ & 15);
while (lj_char_isdigit(*p)) {
if (xx < 65536) xx = xx * 10 + (*p & 15);
xx = xx * 10 + (*p & 15);
if (xx >= STRSCAN_MAXEXP) return STRSCAN_ERROR;
p++;
}
ex += negx ? -(int32_t)xx : (int32_t)xx;
@@ -499,6 +503,9 @@ StrScanFmt lj_strscan_scan(const uint8_t *p, MSize len, TValue *o,
if ((opt & STRSCAN_OPT_TONUM)) {
o->n = neg ? -(double)x : (double)x;
return STRSCAN_NUM;
} else if (x == 0 && neg) {
o->n = -0.0;
return STRSCAN_NUM;
} else {
o->i = neg ? -(int32_t)x : (int32_t)x;
return STRSCAN_INT;
@@ -516,7 +523,7 @@ StrScanFmt lj_strscan_scan(const uint8_t *p, MSize len, TValue *o,
fmt = strscan_dec(sp, o, fmt, opt, ex, neg, dig);
/* Try to convert number to integer, if requested. */
if (fmt == STRSCAN_NUM && (opt & STRSCAN_OPT_TOINT)) {
if (fmt == STRSCAN_NUM && (opt & STRSCAN_OPT_TOINT) && !tvismzero(o)) {
double n = o->n;
int32_t i = lj_num2int(n);
if (n == (lua_Number)i) { o->i = i; return STRSCAN_INT; }