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take plus/minus signs into account

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This commit is contained in:
Kenichi Ishigaki 2012-04-27 14:08:40 +00:00
parent d713d9e49b
commit 46443af248
1 changed files with 17 additions and 15 deletions
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32
dbdimp.c
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@ -171,17 +171,19 @@ static int
sqlite_is_number(pTHX_ const char *v, int sql_type)
{
const char *z = v;
const char *d = v;
int neg;
int digit = 0;
int precision = 0;
int has_plus = 0;
char format[10];
if (sql_type != SQLITE_NULL) {
while (*z == ' ') { z++; v++; }
}
if (*z == '-') { neg = 1; z++; }
else if (*z == '+') { neg = 0; z++; }
if (*z == '-') { neg = 1; z++; d++; }
else if (*z == '+') { neg = 0; z++; d++; has_plus = 1; }
else { neg = 0; }
if (!isdigit(*z)) return 0;
z++;
@ -191,24 +193,24 @@ sqlite_is_number(pTHX_ const char *v, int sql_type)
if (digit == 19) {
int c;
char tmp[22];
strncpy(tmp, v, z - v + 1);
c = memcmp(tmp, "922337203685477580", 18) * 10;
strncpy(tmp, d, z - d + 1);
c = memcmp(tmp, "922337203685477580", 18);
if (c == 0) {
c = tmp[18] - '8';
c = tmp[18] - '7' - neg;
}
if (c < neg) return 0;
if (c > 0) return 0;
}
#else
if (digit > 11) return 0; /* too large for i32 */
if (digit == 11) {
if (digit > 10) return 0; /* too large for i32 */
if (digit == 10) {
int c;
char tmp[14];
strncpy(tmp, v, z - v + 1);
c = memcmp(tmp, "2147483648", 10) * 10;
strncpy(tmp, d, z - d + 1);
c = memcmp(tmp, "214748364", 9);
if (c == 0) {
c = tmp[10] - '8';
c = tmp[9] - '7' - neg;
}
if (c < neg) return 0;
if (c > 0) return 0;
}
#endif
if (*z == '.') {
@ -224,12 +226,12 @@ sqlite_is_number(pTHX_ const char *v, int sql_type)
}
#if defined(USE_64_BIT_INT)
if (strEQ(form("%lli", atoll(v)), v)) return 1;
if (strEQ(form((has_plus ? "+%lli" : "%lli"), atoll(v)), v)) return 1;
#else
if (strEQ(form("%i", atoi(v)), v)) return 1;
if (strEQ(form((has_plus ? "+%i" : "%i"), atoi(v)), v)) return 1;
#endif
if (precision || sql_type == SQLITE_FLOAT) {
sprintf(format, "%%.%df", precision);
sprintf(format, (has_plus ? "+%%.%df" : "%%.%df"), precision);
if (strEQ(form(format, atof(v)), v)) return 2;
}
return 0;