X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Flocale%2Fnewlocale.c;h=8fb006a7fcdb934ec7031942f5fa1cb6eda6888c;hb=7eda27d025d6d52f855588590366c83d737eb727;hp=447c8fc20262420510135d7c26081acb4b86d638;hpb=4350935ca4521b647472b8c18053325e07541ba1;p=musl

diff --git a/src/locale/newlocale.c b/src/locale/newlocale.c
index 447c8fc2..8fb006a7 100644
--- a/src/locale/newlocale.c
+++ b/src/locale/newlocale.c
@@ -1,14 +1,48 @@
 #include <stdlib.h>
 #include <string.h>
 #include "locale_impl.h"
-#include "libc.h"
 
-locale_t newlocale(int mask, const char *name, locale_t base)
+int __loc_is_allocated(locale_t loc)
 {
-	if (*name && strcmp(name, "C") && strcmp(name, "POSIX"))
-		return 0;
-	if (!base) base = calloc(1, sizeof *base);
-	return base;
+	return loc && loc != C_LOCALE && loc != UTF8_LOCALE;
 }
 
-weak_alias(newlocale, __newlocale);
+locale_t __newlocale(int mask, const char *name, locale_t loc)
+{
+	int i, j;
+	struct __locale_struct tmp;
+	const struct __locale_map *lm;
+
+	/* For locales with allocated storage, modify in-place. */
+	if (__loc_is_allocated(loc)) {
+		for (i=0; i<LC_ALL; i++)
+			if (mask & (1<<i))
+				loc->cat[i] = __get_locale(i, name);
+		return loc;
+	}
+
+	/* Otherwise, build a temporary locale object, which will only
+	 * be instantiated in allocated storage if it does not match
+	 * one of the built-in static locales. This makes the common
+	 * usage case for newlocale, getting a C locale with predictable
+	 * behavior, very fast, and more importantly, fail-safe. */
+	for (j=i=0; i<LC_ALL; i++) {
+		if (loc && !(mask & (1<<i)))
+			lm = loc->cat[i];
+		else
+			lm = __get_locale(i, mask & (1<<i) ? name : "");
+		if (lm) j++;
+		tmp.cat[i] = lm;
+	}
+
+	if (!j)
+		return C_LOCALE;
+	if (j==1 && tmp.cat[LC_CTYPE]==&__c_dot_utf8)
+		return UTF8_LOCALE;
+
+	if ((loc = malloc(sizeof *loc))) *loc = tmp;
+
+	return loc;
+}
+
+weak_alias(__newlocale, newlocale);