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authorUlrich Drepper <drepper@redhat.com>1998-05-08 12:32:47 +0000
committerUlrich Drepper <drepper@redhat.com>1998-05-08 12:32:47 +0000
commitfab6d621377dcd0ace90066684cff09cb26ba725 (patch)
treeebb9ddc285c78bdfdccfa5ba33eba7a2e57d6cae /string/bits/string2.h
parentebcd12d4f11fac725e30b49a8dd1635ec0573eb5 (diff)
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Update.
1998-05-08 12:26 Ulrich Drepper <drepper@cygnus.com> * iconv/gconv_int.h (struct gconv_module): Remove cost field and add cost_hi and cost_lo. * iconv/gconv_conf.c (builtin_modules): Initialize cost_hi from Cost parameter and set cost_lo to INT_MAX. (add_module): Take new parameter and use it to initialize cost_lo. (read_conf_file): Count modules being loaded and use counter for new parameter to add_module. * iconv/gconv_db.c (find_derivation): When look for cost examine cost_hi and cost_lo. 1998-05-08 10:52 Ulrich Drepper <drepper@cygnus.com> * string/bits/string2.h: Don't use unsigned char * unless really necessary since this disturbs C++. * sysdeps/i386/i486/bits/string.h: Likewise. Patch by Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>. 1998-05-08 13:53 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * malloc/malloc.c (top_check): Fix last change.
Diffstat (limited to 'string/bits/string2.h')
-rw-r--r--string/bits/string2.h259
1 files changed, 136 insertions, 123 deletions
diff --git a/string/bits/string2.h b/string/bits/string2.h
index a84cede465..e26d4df53a 100644
--- a/string/bits/string2.h
+++ b/string/bits/string2.h
@@ -52,28 +52,28 @@
# if __BYTE_ORDER == __LITTLE_ENDIAN
# define __STRING2_SMALL_GET16(src, idx) \
- (((__const unsigned char *) (src))[idx + 1] << 8 \
- | ((__const unsigned char *) (src))[idx])
+ (((__const unsigned char *) (__const char *) (src))[idx + 1] << 8 \
+ | ((__const unsigned char *) (__const char *) (src))[idx])
# define __STRING2_SMALL_GET32(src, idx) \
- (((((__const unsigned char *) (src))[idx + 3] << 8 \
- | ((__const char *) (src))[idx + 2]) << 8 \
- | ((__const unsigned char *) (src))[idx + 1]) << 8 \
- | ((__const unsigned char *) (src))[idx])
+ (((((__const unsigned char *) (__const char *) (src))[idx + 3] << 8 \
+ | ((__const unsigned char *) (__const char *) (src))[idx + 2]) << 8 \
+ | ((__const unsigned char *) (__const char *) (src))[idx + 1]) << 8 \
+ | ((__const unsigned char *) (__const char *) (src))[idx])
# else
# define __STRING2_SMALL_GET16(src, idx) \
- (((__const unsigned char *) (src))[idx] << 8 \
- | ((__const unsigned char *) (src))[idx + 1])
+ (((__const unsigned char *) (__const char *) (src))[idx] << 8 \
+ | ((__const unsigned char *) (__const char *) (src))[idx + 1])
# define __STRING2_SMALL_GET32(src, idx) \
- (((((__const unsigned char *) (src))[idx] << 8 \
- | ((__const unsigned char *) (src))[idx + 1]) << 8 \
- | ((__const unsigned char *) (src))[idx + 2]) << 8 \
- | ((__const unsigned char *) (src))[idx + 3])
+ (((((__const unsigned char *) (__const char *) (src))[idx] << 8 \
+ | ((__const unsigned char *) (__const char *) (src))[idx + 1]) << 8 \
+ | ((__const unsigned char *) (__const char *) (src))[idx + 2]) << 8 \
+ | ((__const unsigned char *) (__const char *) (src))[idx + 3])
# endif
#else
/* These are a few types we need for the optimizations if we cannot
use unaligned memory accesses. */
# define __STRING2_COPY_TYPE(N) \
- typedef struct { char __arr[N]; } \
+ typedef struct { unsigned char __arr[N]; } \
__STRING2_COPY_ARR##N __attribute__ ((packed))
__STRING2_COPY_TYPE (2);
__STRING2_COPY_TYPE (3);
@@ -111,7 +111,7 @@ __STRING2_COPY_TYPE (8);
# if _STRING_ARCH_unaligned
# define __strcpy_small(dest, src, srclen) \
- (__extension__ ({ unsigned char *__dest = (unsigned char *) (dest); \
+ (__extension__ ({ char *__dest = (char *) (dest); \
switch (srclen) \
{ \
case 1: \
@@ -155,10 +155,10 @@ __STRING2_COPY_TYPE (8);
__STRING2_SMALL_GET32 (src, 4); \
break; \
} \
- (char *) __dest; }))
+ __dest; }))
# else
# define __strcpy_small(dest, src, srclen) \
- (__extension__ ({ unsigned char *__dest = (unsigned char *) (dest); \
+ (__extension__ ({ char *__dest = (char *) (dest); \
switch (srclen) \
{ \
case 1: \
@@ -167,68 +167,68 @@ __STRING2_COPY_TYPE (8);
case 2: \
*((__STRING2_COPY_ARR2 *) __dest) = \
((__STRING2_COPY_ARR2) \
- { { ((__const unsigned char *) (src))[0], \
+ { { ((__const char *) (src))[0], \
'\0' } }); \
break; \
case 3: \
*((__STRING2_COPY_ARR3 *) __dest) = \
((__STRING2_COPY_ARR3) \
- { { ((__const unsigned char *) (src))[0], \
- ((__const unsigned char *) (src))[1], \
+ { { ((__const char *) (src))[0], \
+ ((__const char *) (src))[1], \
'\0' } }); \
break; \
case 4: \
*((__STRING2_COPY_ARR4 *) __dest) = \
((__STRING2_COPY_ARR4) \
- { { ((__const unsigned char *) (src))[0], \
- ((__const unsigned char *) (src))[1], \
- ((__const unsigned char *) (src))[2], \
+ { { ((__const char *) (src))[0], \
+ ((__const char *) (src))[1], \
+ ((__const char *) (src))[2], \
'\0' } }); \
break; \
case 5: \
*((__STRING2_COPY_ARR5 *) __dest) = \
((__STRING2_COPY_ARR5) \
- { { ((__const unsigned char *) (src))[0], \
- ((__const unsigned char *) (src))[1], \
- ((__const unsigned char *) (src))[2], \
- ((__const unsigned char *) (src))[3], \
+ { { ((__const char *) (src))[0], \
+ ((__const char *) (src))[1], \
+ ((__const char *) (src))[2], \
+ ((__const char *) (src))[3], \
'\0' } }); \
break; \
case 6: \
*((__STRING2_COPY_ARR6 *) __dest) = \
((__STRING2_COPY_ARR6) \
- { { ((__const unsigned char *) (src))[0], \
- ((__const unsigned char *) (src))[1], \
- ((__const unsigned char *) (src))[2], \
- ((__const unsigned char *) (src))[3], \
- ((__const unsigned char *) (src))[4], \
+ { { ((__const char *) (src))[0], \
+ ((__const char *) (src))[1], \
+ ((__const char *) (src))[2], \
+ ((__const char *) (src))[3], \
+ ((__const char *) (src))[4], \
'\0' } }); \
break; \
case 7: \
*((__STRING2_COPY_ARR7 *) __dest) = \
((__STRING2_COPY_ARR7) \
- { { ((__const unsigned char *) (src))[0], \
- ((__const unsigned char *) (src))[1], \
- ((__const unsigned char *) (src))[2], \
- ((__const unsigned char *) (src))[3], \
- ((__const unsigned char *) (src))[4], \
- ((__const unsigned char *) (src))[5], \
+ { { ((__const char *) (src))[0], \
+ ((__const char *) (src))[1], \
+ ((__const char *) (src))[2], \
+ ((__const char *) (src))[3], \
+ ((__const char *) (src))[4], \
+ ((__const char *) (src))[5], \
'\0' } }); \
break; \
case 8: \
*((__STRING2_COPY_ARR8 *) __dest) = \
((__STRING2_COPY_ARR8) \
- { { ((__const unsigned char *) (src))[0], \
- ((__const unsigned char *) (src))[1], \
- ((__const unsigned char *) (src))[2], \
- ((__const unsigned char *) (src))[3], \
- ((__const unsigned char *) (src))[4], \
- ((__const unsigned char *) (src))[5], \
- ((__const unsigned char *) (src))[6], \
+ { { ((__const char *) (src))[0], \
+ ((__const char *) (src))[1], \
+ ((__const char *) (src))[2], \
+ ((__const char *) (src))[3], \
+ ((__const char *) (src))[4], \
+ ((__const char *) (src))[5], \
+ ((__const char *) (src))[6], \
'\0' } }); \
break; \
} \
- (char *) __dest; }))
+ __dest; }))
# endif
#endif
@@ -248,7 +248,7 @@ __STRING2_COPY_TYPE (8);
# if _STRING_ARCH_unaligned
# define __stpcpy_small(dest, src, srclen) \
- (__extension__ ({ unsigned char *__dest = (unsigned char *) (dest); \
+ (__extension__ ({ char *__dest = (char *) (dest); \
switch (srclen) \
{ \
case 1: \
@@ -299,10 +299,10 @@ __STRING2_COPY_TYPE (8);
__dest += 7; \
break; \
} \
- (char *) __dest; }))
+ __dest; }))
# else
# define __stpcpy_small(dest, src, srclen) \
- (__extension__ ({ unsigned char *__dest = (unsigned char *) (dest); \
+ (__extension__ ({ char *__dest = (char *) (dest); \
switch (srclen) \
{ \
case 1: \
@@ -311,68 +311,68 @@ __STRING2_COPY_TYPE (8);
case 2: \
*((__STRING2_COPY_ARR2 *) __dest) = \
((__STRING2_COPY_ARR2) \
- { { ((__const unsigned char *) (src))[0], \
+ { { ((__const char *) (src))[0], \
'\0' } }); \
break; \
case 3: \
*((__STRING2_COPY_ARR3 *) __dest) = \
((__STRING2_COPY_ARR3) \
- { { ((__const unsigned char *) (src))[0], \
- ((__const unsigned char *) (src))[1], \
+ { { ((__const char *) (src))[0], \
+ ((__const char *) (src))[1], \
'\0' } }); \
break; \
case 4: \
*((__STRING2_COPY_ARR4 *) __dest) = \
((__STRING2_COPY_ARR4) \
- { { ((__const unsigned char *) (src))[0], \
- ((__const unsigned char *) (src))[1], \
- ((__const unsigned char *) (src))[2], \
+ { { ((__const char *) (src))[0], \
+ ((__const char *) (src))[1], \
+ ((__const char *) (src))[2], \
'\0' } }); \
break; \
case 5: \
*((__STRING2_COPY_ARR5 *) __dest) = \
((__STRING2_COPY_ARR5) \
- { { ((__const unsigned char *) (src))[0], \
- ((__const unsigned char *) (src))[1], \
- ((__const unsigned char *) (src))[2], \
- ((__const unsigned char *) (src))[3], \
+ { { ((__const char *) (src))[0], \
+ ((__const char *) (src))[1], \
+ ((__const char *) (src))[2], \
+ ((__const char *) (src))[3], \
'\0' } }); \
break; \
case 6: \
*((__STRING2_COPY_ARR6 *) __dest) = \
((__STRING2_COPY_ARR6) \
- { { ((__const unsigned char *) (src))[0], \
- ((__const unsigned char *) (src))[1], \
- ((__const unsigned char *) (src))[2], \
- ((__const unsigned char *) (src))[3], \
- ((__const unsigned char *) (src))[4], \
+ { { ((__const char *) (src))[0], \
+ ((__const char *) (src))[1], \
+ ((__const char *) (src))[2], \
+ ((__const char *) (src))[3], \
+ ((__const char *) (src))[4], \
'\0' } }); \
break; \
case 7: \
*((__STRING2_COPY_ARR7 *) __dest) = \
((__STRING2_COPY_ARR7) \
- { { ((__const unsigned char *) (src))[0], \
- ((__const unsigned char *) (src))[1], \
- ((__const unsigned char *) (src))[2], \
- ((__const unsigned char *) (src))[3], \
- ((__const unsigned char *) (src))[4], \
- ((__const unsigned char *) (src))[5], \
+ { { ((__const char *) (src))[0], \
+ ((__const char *) (src))[1], \
+ ((__const char *) (src))[2], \
+ ((__const char *) (src))[3], \
+ ((__const char *) (src))[4], \
+ ((__const char *) (src))[5], \
'\0' } }); \
break; \
case 8: \
*((__STRING2_COPY_ARR8 *) __dest) = \
((__STRING2_COPY_ARR8) \
- { { ((__const unsigned char *) (src))[0], \
- ((__const unsigned char *) (src))[1], \
- ((__const unsigned char *) (src))[2], \
- ((__const unsigned char *) (src))[3], \
- ((__const unsigned char *) (src))[4], \
- ((__const unsigned char *) (src))[5], \
- ((__const unsigned char *) (src))[6], \
+ { { ((__const char *) (src))[0], \
+ ((__const char *) (src))[1], \
+ ((__const char *) (src))[2], \
+ ((__const char *) (src))[3], \
+ ((__const char *) (src))[4], \
+ ((__const char *) (src))[5], \
+ ((__const char *) (src))[6], \
'\0' } }); \
break; \
} \
- (char *) (__dest + ((srclen) - 1)); }))
+ __dest + ((srclen) - 1); }))
# endif
# endif
#endif
@@ -428,8 +428,9 @@ __STRING2_COPY_TYPE (8);
(__extension__ (__builtin_constant_p (s1) && __builtin_constant_p (s2) \
&& (!__string2_1bptr_p (s1) || strlen (s1) >= 4) \
&& (!__string2_1bptr_p (s2) || strlen (s2) >= 4) \
- ? memcmp (s1, s2, (strlen (s1) < strlen (s2) \
- ? strlen (s1) : strlen (s2)) + 1) \
+ ? memcmp ((__const char *) s1, (__const char *) s2, \
+ (strlen (s1) < strlen (s2) \
+ ? strlen (s1) : strlen (s2)) + 1) \
: (__builtin_constant_p (s1) && __string2_1bptr_p (s1) \
&& strlen (s1) < 4 \
? (__builtin_constant_p (s2) && __string2_1bptr_p (s2) \
@@ -444,40 +445,48 @@ __STRING2_COPY_TYPE (8);
# define __strcmp_cc(s1, s2, l) \
(__extension__ ({ register int __result = \
- (((__const unsigned char *) (s1))[0] \
- - ((__const unsigned char *) (s2))[0]); \
+ (((__const unsigned char *) (__const char *) (s1))[0] \
+ - ((__const unsigned char *) (__const char *)(s2))[0]);\
if (l > 0 && __result == 0) \
{ \
- __result = (((__const unsigned char *) (s1))[1] \
- - ((__const unsigned char *) (s2))[1]); \
+ __result = (((__const unsigned char *) \
+ (__const char *) (s1))[1] \
+ - ((__const unsigned char *) \
+ (__const char *) (s2))[1]); \
if (l > 1 && __result == 0) \
{ \
__result = \
- (((__const unsigned char *) (s1))[2] \
- - ((__const unsigned char *) (s2))[2]); \
+ (((__const unsigned char *) \
+ (__const char *) (s1))[2] \
+ - ((__const unsigned char *) \
+ (__const char *) (s2))[2]); \
if (l > 2 && __result == 0) \
__result = \
- (((__const unsigned char *) (s1))[3] \
- - ((__const unsigned char *) (s2))[3]); \
+ (((__const unsigned char *) \
+ (__const char *) (s1))[3] \
+ - ((__const unsigned char *) \
+ (__const char *) (s2))[3]); \
} \
} \
__result; }))
# define __strcmp_cg(s1, s2, l1) \
(__extension__ ({ __const unsigned char *__s2 = \
- (__const unsigned char *) (s2); \
+ (__const unsigned char *) (__const char *) (s2); \
register int __result = \
- (((__const unsigned char *) (s1))[0] - __s2[0]); \
+ (((__const unsigned char *) (__const char *) (s1))[0] \
+ - __s2[0]); \
if (l1 > 0 && __result == 0) \
{ \
- __result = (((__const unsigned char *) (s1))[1] \
- - __s2[1]); \
+ __result = (((__const unsigned char *) \
+ (__const char *) (s1))[1] - __s2[1]); \
if (l1 > 1 && __result == 0) \
{ \
- __result = (((__const unsigned char *) (s1))[2] \
- - __s2[2]); \
+ __result = (((__const unsigned char *) \
+ (__const char *) (s1))[2] - __s2[2]);\
if (l1 > 2 && __result == 0) \
- __result = (((__const unsigned char *) (s1))[3] \
+ __result = (((__const unsigned char *) \
+ (__const char *) (s1))[3] \
- __s2[3]); \
} \
} \
@@ -485,21 +494,25 @@ __STRING2_COPY_TYPE (8);
# define __strcmp_gc(s1, s2, l2) \
(__extension__ ({ __const unsigned char *__s1 = \
- (__const unsigned char *) (s1); \
+ (__const unsigned char *) (__const char *) (s1); \
register int __result = \
- __s1[0] - ((__const unsigned char *) (s2))[0]; \
+ __s1[0] - ((__const unsigned char *) \
+ (__const char *) (s2))[0]; \
if (l2 > 0 && __result == 0) \
{ \
__result = (__s1[1] \
- - ((__const unsigned char *) (s2))[1]); \
+ - ((__const unsigned char *) \
+ (__const char *) (s2))[1]); \
if (l2 > 1 && __result == 0) \
{ \
__result = \
- (__s1[2] - ((__const unsigned char *) (s2))[2]);\
+ (__s1[2] - ((__const unsigned char *) \
+ (__const char *) (s2))[2]); \
if (l2 > 2 && __result == 0) \
__result = \
(__s1[3] \
- - ((__const unsigned char *)(s2))[3]); \
+ - ((__const unsigned char *) \
+ (__const char *) (s2))[3]); \
} \
} \
__result; }))
@@ -522,14 +535,14 @@ __STRING2_COPY_TYPE (8);
#ifndef _HAVE_STRING_ARCH_strcspn
# define strcspn(s, reject) \
(__extension__ (__builtin_constant_p (reject) && __string2_1bptr_p (reject) \
- ? (((__const unsigned char *) (reject))[0] == '\0' \
+ ? (((__const char *) (reject))[0] == '\0' \
? strlen (s) \
- : (((__const unsigned char *) (reject))[1] == '\0' \
+ : (((__const char *) (reject))[1] == '\0' \
? __strcspn_c1 (s, ((__const char *) (reject))[0]) \
- : (((__const unsigned char *) (reject))[2] == '\0' \
+ : (((__const char *) (reject))[2] == '\0' \
? __strcspn_c2 (s, ((__const char *) (reject))[0], \
((__const char *) (reject))[1]) \
- : (((__const unsigned char *) (reject))[3] == '\0' \
+ : (((__const char *) (reject))[3] == '\0' \
? __strcspn_c3 (s, \
((__const char *) (reject))[0], \
((__const char *) (reject))[1], \
@@ -579,14 +592,14 @@ __strcspn_c3 (__const char *__s, char __reject1, char __reject2,
#ifndef _HAVE_STRING_ARCH_strspn
# define strspn(s, accept) \
(__extension__ (__builtin_constant_p (accept) && __string2_1bptr_p (accept) \
- ? (((__const unsigned char *) (accept))[0] == '\0' \
+ ? (((__const char *) (accept))[0] == '\0' \
? 0 \
- : (((__const unsigned char *) (accept))[1] == '\0' \
+ : (((__const char *) (accept))[1] == '\0' \
? __strspn_c1 (s, ((__const char *) (accept))[0]) \
- : (((__const unsigned char *) (accept))[2] == '\0' \
+ : (((__const char *) (accept))[2] == '\0' \
? __strspn_c2 (s, ((__const char *) (accept))[0], \
((__const char *) (accept))[1]) \
- : (((__const unsigned char *) (accept))[3] == '\0' \
+ : (((__const char *) (accept))[3] == '\0' \
? __strspn_c3 (s, \
((__const char *) (accept))[0], \
((__const char *) (accept))[1], \
@@ -636,14 +649,14 @@ __strspn_c3 (__const char *__s, char __accept1, char __accept2, char __accept3)
#ifndef _HAVE_STRING_ARCH_strpbrk
# define strpbrk(s, accept) \
(__extension__ (__builtin_constant_p (accept) && __string2_1bptr_p (accept) \
- ? (((__const unsigned char *) (accept))[0] == '\0' \
+ ? (((__const char *) (accept))[0] == '\0' \
? NULL \
- : (((__const unsigned char *) (accept))[1] == '\0' \
- ? strchr (s, ((__const unsigned char *) (accept))[0]) \
- : (((__const unsigned char *) (accept))[2] == '\0' \
+ : (((__const char *) (accept))[1] == '\0' \
+ ? strchr (s, ((__const char *) (accept))[0]) \
+ : (((__const char *) (accept))[2] == '\0' \
? __strpbrk_c2 (s, ((__const char *) (accept))[0], \
((__const char *) (accept))[1]) \
- : (((__const unsigned char *) (accept))[3] == '\0' \
+ : (((__const char *) (accept))[3] == '\0' \
? __strpbrk_c3 (s, \
((__const char *) (accept))[0], \
((__const char *) (accept))[1], \
@@ -681,11 +694,11 @@ __strpbrk_c3 (__const char *__s, char __accept1, char __accept2,
#ifndef _HAVE_STRING_ARCH_strstr
# define strstr(haystack, needle) \
(__extension__ (__builtin_constant_p (needle) && __string2_1bptr_p (needle) \
- ? (((__const unsigned char *) (needle))[0] == '\0' \
+ ? (((__const char *) (needle))[0] == '\0' \
? (char *) (haystack) \
- : (((__const unsigned char *) (needle))[1] == '\0' \
+ : (((__const char *) (needle))[1] == '\0' \
? strchr (haystack, \
- ((__const unsigned char *) (needle))[0]) \
+ ((__const char *) (needle))[0]) \
: strstr (haystack, needle))) \
: strstr (haystack, needle)))
#endif
@@ -707,8 +720,8 @@ strnlen (__const char *__string, size_t __maxlen)
#ifndef _HAVE_STRING_ARCH_strtok_r
# define __strtok_r(s, sep, nextp) \
(__extension__ (__builtin_constant_p (sep) && __string2_1bptr_p (sep) \
- ? (((__const unsigned char *) (sep))[0] != '\0' \
- && ((__const unsigned char *) (sep))[1] == '\0' \
+ ? (((__const char *) (sep))[0] != '\0' \
+ && ((__const char *) (sep))[1] == '\0' \
? __strtok_r_1c (s, ((__const char *) (sep))[0], nextp) \
: __strtok_r (s, sep, nextp)) \
: __strtok_r (s, sep, nextp)))
@@ -749,14 +762,14 @@ __strtok_r_1c (char *__s, char __sep, char **__nextp)
# define __strsep(s, reject) \
(__extension__ (__builtin_constant_p (reject) && __string2_1bptr_p (reject) \
- && ((__const unsigned char *) (reject))[0] != '\0' \
- ? (((__const unsigned char *) (reject))[1] == '\0' \
+ && ((__const char *) (reject))[0] != '\0' \
+ ? (((__const char *) (reject))[1] == '\0' \
? __strsep_1c (s, \
((__const char *) (reject))[0]) \
- : (((__const unsigned char *) (reject))[2] == '\0' \
+ : (((__const char *) (reject))[2] == '\0' \
? __strsep_2c (s, ((__const char *) (reject))[0], \
((__const char *) (reject))[1]) \
- : (((__const unsigned char *) (reject))[3] == '\0' \
+ : (((__const char *) (reject))[3] == '\0' \
? __strsep_3c (s, ((__const char *) (reject))[0], \
((__const char *) (reject))[1], \
((__const char *) (reject))[2]) \
@@ -858,7 +871,7 @@ __strsep_g (char **__s, __const char *__reject)
# define __strdup(s) \
(__extension__ (__builtin_constant_p (s) && __string2_1bptr_p (s) \
- ? (((__const unsigned char *) (s))[0] == '\0' \
+ ? (((__const char *) (s))[0] == '\0' \
? (char *) calloc (1, 1) \
: ({ size_t __len = strlen (s) + 1; \
char *__retval = (char *) malloc (__len); \
@@ -881,7 +894,7 @@ __strsep_g (char **__s, __const char *__reject)
# define __strndup(s, n) \
(__extension__ (__builtin_constant_p (s) && __string2_1bptr_p (s) \
- ? (((__const unsigned char *) (s))[0] == '\0' \
+ ? (((__const char *) (s))[0] == '\0' \
? (char *) calloc (1, 1) \
: ({ size_t __len = strlen (s) + 1; \
size_t __n = (n); \