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Don't use PyOS_strnicmp for NaN and Inf detection: it's locale-aware.

This commit is contained in:
Mark Dickinson 2009-05-03 22:33:34 +00:00
parent 777e4ff503
commit 01fce5adc0
1 changed files with 16 additions and 3 deletions
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19
Python/pystrtod.c
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@ -40,6 +40,19 @@
correctly rounded results. correctly rounded results.
*/ */
/* Case-insensitive string match used for nan and inf detection; t should be
lower-case. Returns 1 for a successful match, 0 otherwise. */
static int
case_insensitive_match(const char *s, const char *t)
{
while(*t && Py_TOLOWER(*s) == *t) {
s++;
t++;
}
return *t ? 0 : 1;
}
double double
PyOS_ascii_strtod(const char *nptr, char **endptr) PyOS_ascii_strtod(const char *nptr, char **endptr)
{ {
@ -89,9 +102,9 @@ PyOS_ascii_strtod(const char *nptr, char **endptr)
/* Parse infinities and nans */ /* Parse infinities and nans */
if (*p == 'i' || *p == 'I') { if (*p == 'i' || *p == 'I') {
if (PyOS_strnicmp(p, "inf", 3) == 0) { if (case_insensitive_match(p+1, "nf")) {
val = Py_HUGE_VAL; val = Py_HUGE_VAL;
if (PyOS_strnicmp(p+3, "inity", 5) == 0) if (case_insensitive_match(p+3, "inity"))
fail_pos = (char *)p+8; fail_pos = (char *)p+8;
else else
fail_pos = (char *)p+3; fail_pos = (char *)p+3;
@ -102,7 +115,7 @@ PyOS_ascii_strtod(const char *nptr, char **endptr)
} }
#ifdef Py_NAN #ifdef Py_NAN
if (*p == 'n' || *p == 'N') { if (*p == 'n' || *p == 'N') {
if (PyOS_strnicmp(p, "nan", 3) == 0) { if (case_insensitive_match(p+1, "an")) {
val = Py_NAN; val = Py_NAN;
fail_pos = (char *)p+3; fail_pos = (char *)p+3;
goto got_val; goto got_val;