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stdlib: fix grouping verification with multi-byte thousands separator (bug 30964)

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The grouping verification only worked for a single-byte thousands
separator.  With a multi-byte separator it returned as if no separators
were present.  The actual parsing in str_to_mpn will then go wrong when
there are multiple adjacent multi-byte separators in the number.
This commit is contained in:
Andreas Schwab 2023-10-11 16:22:16 +02:00
parent d846c28389
commit 69239bd7a2
2 changed files with 13 additions and 24 deletions
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33
stdlib/grouping.c
View File

@ -59,7 +59,6 @@ __correctly_grouped_prefixmb (const STRING_TYPE *begin, const STRING_TYPE *end,
size_t thousands_len = 1;
#else
size_t thousands_len = strlen (thousands);
int cnt;
#endif
while (end - begin >= thousands_len)
@ -74,14 +73,8 @@ __correctly_grouped_prefixmb (const STRING_TYPE *begin, const STRING_TYPE *end,
if (*cp == thousands)
break;
#else
if (cp[thousands_len - 1] == *thousands)
{
for (cnt = 1; thousands[cnt] != '\0'; ++cnt)
if (thousands[cnt] != cp[thousands_len - 1 - cnt])
break;
if (thousands[cnt] == '\0')
break;
}
if (memcmp (cp, thousands, thousands_len) == 0)
break;
#endif
--cp;
}
@ -91,7 +84,7 @@ __correctly_grouped_prefixmb (const STRING_TYPE *begin, const STRING_TYPE *end,
if (cp < begin)
return end;
if (end - cp == (int) *gp + 1)
if (end - cp == (int) *gp + thousands_len)
{
/* This group matches the specification. */
@ -105,7 +98,7 @@ __correctly_grouped_prefixmb (const STRING_TYPE *begin, const STRING_TYPE *end,
remainder of the string from BEGIN to NEW_END is the part we
will consider if there is a grouping error in this trailing
portion from CP to END. */
new_end = cp - 1;
new_end = cp;
/* Loop while the grouping is correct. */
while (1)
@ -132,10 +125,7 @@ __correctly_grouped_prefixmb (const STRING_TYPE *begin, const STRING_TYPE *end,
if (*cp == thousands)
break;
#else
for (cnt = 0; thousands[cnt] != '\0'; ++cnt)
if (thousands[cnt] != cp[thousands_len - cnt - 1])
break;
if (thousands[cnt] == '\0')
if (memcmp (cp, thousands, thousands_len) == 0)
break;
#endif
--cp;
@ -156,20 +146,17 @@ __correctly_grouped_prefixmb (const STRING_TYPE *begin, const STRING_TYPE *end,
if (*cp == thousands)
break;
#else
for (cnt = 0; thousands[cnt] != '\0'; ++cnt)
if (thousands[cnt] != cp[thousands_len - cnt - 1])
break;
if (thousands[cnt] == '\0')
if (memcmp (cp, thousands, thousands_len) == 0)
break;
#endif
--cp;
}
if (cp < begin && group_end - cp <= (int) *gp)
if (cp < begin && group_end - cp <= (int) *gp + thousands_len - 1)
/* Final group is correct. */
return end;
if (cp < begin || group_end - cp != (int) *gp)
if (cp < begin || group_end - cp != (int) *gp + thousands_len - 1)
/* Incorrect group. Punt. */
break;
}
@ -183,8 +170,8 @@ __correctly_grouped_prefixmb (const STRING_TYPE *begin, const STRING_TYPE *end,
else
{
/* Even the first group was wrong; determine maximum shift. */
if (end - cp > (int) *gp + 1)
end = cp + (int) *gp + 1;
if (end - cp > (int) *gp + thousands_len)
end = cp + (int) *gp + thousands_len;
else if (cp < begin)
/* This number does not fill the first group, but is correct. */
return end;

4
stdlib/tst-strtod4.c
View File

@ -13,7 +13,9 @@ static const struct
} tests[] =
{
{ "000"NNBSP"000"NNBSP"000", "", 0.0 },
{ "1"NNBSP"000"NNBSP"000,5x", "x", 1000000.5 }
{ "1"NNBSP"000"NNBSP"000,5x", "x", 1000000.5 },
/* Bug 30964 */
{ "10"NNBSP NNBSP"200", NNBSP NNBSP"200", 10.0 }
};
#define NTESTS (sizeof (tests) / sizeof (tests[0]))