Libc-1082.50.1.tar.gz

[apple/libc.git] / locale / FreeBSD / wcstod.c

diff --git a/locale/FreeBSD/wcstod.c b/locale/FreeBSD/wcstod.c
index 656e5e5e2a2f5c8275913542d5d509372b1d6230..3ecc75a0ca2a78982de59eb7c394b6bc51fbdac0 100644 (file)
--- a/locale/FreeBSD/wcstod.c
+++ b/locale/FreeBSD/wcstod.c
@@ -25,11 +25,33 @@
  */
 
 #include <sys/cdefs.h>
-__FBSDID("$FreeBSD: src/lib/libc/locale/wcstod.c,v 1.2 2003/02/22 00:06:05 tjr Exp $");
+__FBSDID("$FreeBSD: src/lib/libc/locale/wcstod.c,v 1.4 2004/04/07 09:47:56 tjr Exp $");
+
+#include "xlocale_private.h"
 
 #include <stdlib.h>
 #include <wchar.h>
 #include <wctype.h>
+#include <_simple.h>
+
+/*
+ * __wcs_end_offset calculates the offset to the end within the wide character
+ * string, assuming numbers and letters are single bytes in multibyte
+ * representation, get the actual decimal string for localeconv_l.  If the
+ * decimal point was within the string, compensate for the fact that the
+ * (possible more than one byte) decimal point one takes one wide character.
+ */
+__private_extern__ size_t
+__wcs_end_offset(const char * __restrict buf, const char * __restrict end, locale_t loc)
+{
+       const char *decimalpoint = localeconv_l(loc)->decimal_point;
+       size_t n = end - buf;
+       char *p;
+
+       if ((p = strnstr(buf, decimalpoint, n)) != NULL)
+               n -= strlen(decimalpoint) - 1;
+       return n;
+}
 
 /*
  * Convert a string to a double-precision number.
@@ -38,45 +60,48 @@ __FBSDID("$FreeBSD: src/lib/libc/locale/wcstod.c,v 1.2 2003/02/22 00:06:05 tjr E
  * have to duplicate the code of strtod() here, we convert the supplied
  * wide character string to multibyte and call strtod() on the result.
  * This assumes that the multibyte encoding is compatible with ASCII
- * for at least the digits, radix character and letters.
+ * for at least the digits and letters.  The radix character can be more
+ * than one byte.
  */
+
 double
-wcstod(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr)
+wcstod_l(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr,
+    locale_t loc)
 {
        static const mbstate_t initial;
-       mbstate_t state;
+       mbstate_t mbs;
        double val;
-       char *buf, *end, *p;
-       const wchar_t *wcp;
-       size_t clen, len;
+       char *buf, *end;
+       size_t len;
+       locale_t ctype;
+       _SIMPLE_STRING b;
+       char mb[MB_CUR_MAX + 1];
+       const wchar_t *nptr0 = nptr;
+       const wchar_t *first;
 
-       while (iswspace(*nptr))
+       NORMALIZE_LOCALE(loc);
+       ctype = __numeric_ctype(loc);
+
+       while (iswspace_l(*nptr, ctype))
                nptr++;
 
-       /*
-        * Convert the supplied numeric wide char. string to multibyte.
-        *
-        * We could attempt to find the end of the numeric portion of the
-        * wide char. string to avoid converting unneeded characters but
-        * choose not to bother; optimising the uncommon case where
-        * the input string contains a lot of text after the number
-        * duplicates a lot of strtod()'s functionality and slows down the
-        * most common cases.
-        */
-       state = initial;
-       wcp = nptr;
-       if ((len = wcsrtombs(NULL, &wcp, 0, &state)) == (size_t)-1) {
-               if (endptr != NULL)
-                       *endptr = (wchar_t *)nptr;
+       if ((b = _simple_salloc()) == NULL)
                return (0.0);
+
+       first = nptr;
+       mbs = initial;
+       while (*nptr && (len = wcrtomb_l(mb, *nptr, &mbs, ctype)) != (size_t)-1) {
+               mb[len] = 0;
+               if (_simple_sappend(b, mb) < 0) { /* no memory */
+                       _simple_sfree(b);
+                       return (0.0);
+               }
+               nptr++;
        }
-       if ((buf = malloc(len + 1)) == NULL)
-               return (0.0);
-       state = initial;
-       wcsrtombs(buf, &wcp, len + 1, &state);
 
        /* Let strtod() do most of the work for us. */
-       val = strtod(buf, &end);
+       buf = _simple_string(b);
+       val = strtod_l(buf, &end, loc);
 
        /*
         * We only know where the number ended in the _multibyte_
@@ -84,24 +109,17 @@ wcstod(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr)
         * where it ended, count multibyte characters to find the
         * corresponding position in the wide char string.
         */
-       if (endptr != NULL) {
-#if 1                                  /* Fast, assume 1:1 WC:MBS mapping. */
-               *endptr = (wchar_t *)nptr + (end - buf);
-               (void)clen;
-               (void)p;
-#else                                  /* Slow, conservative approach. */
-               state = initial;
-               *endptr = (wchar_t *)nptr;
-               p = buf;
-               while (p < end &&
-                   (clen = mbrlen(p, end - p, &state)) > 0) {
-                       p += clen;
-                       (*endptr)++;
-               }
-#endif
-       }
+       if (endptr != NULL)
+               /* XXX Assume each wide char is one byte. */
+               *endptr = (end == buf) ? (wchar_t *)nptr0 : ((wchar_t *)first + __wcs_end_offset(buf, end, loc));
 
-       free(buf);
+       _simple_sfree(b);
 
        return (val);
 }
+
+double
+wcstod(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr)
+{
+       return wcstod_l(nptr, endptr, __current_locale());
+}