From 61eb22d3a8e9bb9c339bdbe907a85656823f4c7e Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Tue, 16 Sep 1997 00:42:43 +0000 Subject: Update. 1997-09-16 02:14 Ulrich Drepper Implementation of Hesiod NSS module by Mark Kettenis. * hesiod/Makefile: New file. * hesiod/hesiod.c: New file. * hesiod/hesiod.h: New file. * hesiod/hesiod_p.h: New file. * hesiod/libnss_hesiod.map: New file. * hesiod/nss_hesiod/hesiod-grp.c: New file. * hesiod/nss_hesiod/hesiod-pwd.c: New file. * hesiod/nss_hesiod/hesiod-service.c: New file. * sysdeps/unix/inet/Subdirs: Add hesiod. * shlib-versions: Add version number for libnss_hesiod. * libio/iolibio.h: Remove definition of _IO_* macros. * libio/fileops.c: Define close, fstat, lseek, read, and write as macros to use __ protected versions. Use those functions instead of _IO_* functions. * libio/iopopen.c: Define _IO_close to close. * manual/math.texi: Explain the use of the optimizing inline functions. Describe rand_r function and tell about SysV RNGs in introduction. * resolv/res_send.c (res_send): Use socklen_t type for `fromlen' variable. * string/Makefile (tests): Add noinl-tester. * string/noinl-tester.c: New file. * string/tester.c: Add more stpcpy tests for constant arguments for all short lengths. * string/string.h: Always declare __bzero. Describe __NO_STRING_INLINES. Always include . * string/bits/string2.h: Add warning about direct use. Change __strcpy_small and __stpcpy_small implementation to use macros and provide alternative for platforms which cannot do unaligned stores. * sysdeps/i386/bits/string.h: Don't define anything is __NO_STRING_INLINES is defined. * sysdeps/i386/i486/bits/string.h: Change __strcpy_small and __stpcpy_small implementation to use macros and provide alternative for platforms which cannot do unaligned stores. * sysdeps/alpha/bzero.S: Define bzero as weak alias of __bzero. * sysdeps/generic/bzero.c: Likewise. * sysdeps/i386/bzero.c: Likewise. * sysdeps/i386/i586/bzero.S: Likewise. * sysdeps/vax/bzero.s: Likewise. * sysdeps/generic/bits/select.h: Don't use ugly casts to access array. * sysdeps/i386/bits/select.h: Likewise. * sysdeps/i386/fpu/bits/mathinline.c (__finite): Relax register constraints a bit. Don't define and test for _BITS_MATHINLINE_H. Emit warning if used directly and not through math.h. * sysdeps/i386/i486/atomicity.h: Change return type of compare_and_swap to char to get better code. Fix typo. * sysdeps/stub/atomicity.h: Fix typo. 1997-09-14 Andreas Schwab * sysdeps/generic/stpcpy.c: #undef stpcpy and __stpcpy. 1997-09-14 Andreas Schwab * string/bits/string2.h: Add prototypes to avoid warning. 1997-09-14 Andreas Schwab * string/bits/string2.h (strsep): Fix handling of empty REJECT. (__strsep_1c): Handle NULL and empty string. (__strsep_g): Likewise. 1997-09-13 Andreas Schwab * catgets/Makefile (extra-objs): Set this instead of generated. * md5-crypt/Makefile (extra-objs): Add all object file variants of onlymd5-entry. 1997-09-12 Andreas Schwab * sysdeps/generic/sysd-stdio.c (__stdio_read): Fix typo in last change. 1997-09-12 Andreas Schwab * sysdeps/m68k/m68020/atomicity.h: New file. 1997-09-15 05:11 Ulrich Drepper * posix/Makefile (distribute): Add globtest.c and globtest.sh. Compile and run globtest if not cross-compiling. * posix/globtest.c: New file. * posix/globtest.sh: New file. * posix/glob.c: Pretty print preprocessor stuff. (glob_in_dir): If PATTERN is not really a pattern still check whether it is a real file in the current directory and return error if not. Reported by Eugene Mamchits . * libio/fileops.c (_IO_file_sync): Acquire lock before doing the work. * libio/ioseekoff.c (_IO_seekoff): Likewise. * libio/ioseekpos.c (_IO_seekpos): Likewise. 1997-09-13 18:06 Ulrich Drepper * configure.in: Prevent configuration for unsupported platforms. 1997-09-13 04:07 Ulrich Drepper * elf/rtld.c (dl_main): Make sure we always have a file argument by testing for < 2 arguments after recognizing the options. 1997-09-12 11:47 Fila Kolodny * string/bits/string2.h (__strsep_1c): Cast out const from __retval. (__strsep_g): Likewise. --- sysdeps/i386/i486/bits/string.h | 160 +++++++++++++++++++++++++++++----------- 1 file changed, 118 insertions(+), 42 deletions(-) (limited to 'sysdeps/i386/i486/bits/string.h') diff --git a/sysdeps/i386/i486/bits/string.h b/sysdeps/i386/i486/bits/string.h index 770f5c1e15..5e4abbc3e5 100644 --- a/sysdeps/i386/i486/bits/string.h +++ b/sysdeps/i386/i486/bits/string.h @@ -18,11 +18,17 @@ Boston, MA 02111-1307, USA. */ #ifndef _STRING_H -#error "Never use directly; include instead." +# error "Never use directly; include instead." #endif -/* We only provide optimizations for the GNU CC. */ -#if defined __GNUC__ && __GNUC__ >= 2 +/* The ix86 processors can access unaligned multi-byte variables. */ +#define _STRING_ARCH_unaligned 1 + + +/* We only provide optimizations if the user selects them and if + GNU CC is used. */ +#if !defined __NO_STRING_INLINES && defined __USE_STRING_INLINES \ + && defined __GNUC__ && __GNUC__ >= 2 #ifdef __cplusplus # define __STRING_INLINE inline @@ -30,6 +36,13 @@ # define __STRING_INLINE extern __inline #endif +/* The macros are used in some of the optimized implementations below. */ +#define __STRING_SMALL_GET16(src, idx) \ + (((src)[idx + 1] << 8) | (src)[idx]) +#define __STRING_SMALL_GET32(src, idx) \ + ((((src)[idx + 3] << 8 | (src)[idx + 2]) << 8 \ + | (src)[idx + 1]) << 8 | (src)[idx]) + /* Copy N bytes of SRC to DEST. */ #define _HAVE_STRING_ARCH_memcpy 1 @@ -355,9 +368,59 @@ __strlen_g (__const char *__str) #define _HAVE_STRING_ARCH_strcpy 1 #define strcpy(dest, src) \ (__extension__ (__builtin_constant_p (src) \ - ? (char *) memcpy (dest, src, strlen (src) + 1) \ + ? (sizeof (src[0]) == 1 && strlen (src) + 1 <= 8 \ + ? __strcpy_small (dest, src, strlen (src) + 1) \ + : (char *) memcpy (dest, src, strlen (src) + 1)) \ : __strcpy_g (dest, src))) +# define __strcpy_small(dest, src, srclen) \ + (__extension__ ({ char *__retval = (dest); \ + char *__cp = __retval; \ + switch (srclen) \ + { \ + case 1: \ + *((unsigned char *) __cp) = '\0'; \ + break; \ + case 2: \ + *((__uint16_t *) __cp) = \ + __STRING_SMALL_GET16 (src, 0); \ + break; \ + case 3: \ + *((__uint16_t *) __cp)++ = \ + __STRING_SMALL_GET16 (src, 0); \ + *((unsigned char *) __cp) = '\0'; \ + break; \ + case 4: \ + *((__uint32_t *) __cp) = \ + __STRING_SMALL_GET32 (src, 0); \ + break; \ + case 5: \ + *((__uint32_t *) __cp)++ = \ + __STRING_SMALL_GET32 (src, 0); \ + *((unsigned char *) __cp) = '\0'; \ + break; \ + case 6: \ + *((__uint32_t *) __cp)++ = \ + __STRING_SMALL_GET32 (src, 0); \ + *((__uint16_t *) __cp) = \ + __STRING_SMALL_GET16 (src, 4); \ + break; \ + case 7: \ + *((__uint32_t *) __cp)++ = \ + __STRING_SMALL_GET32 (src, 0); \ + *((__uint16_t *) __cp)++ = \ + __STRING_SMALL_GET16 (src, 4); \ + *((unsigned char *) __cp) = '\0'; \ + break; \ + case 8: \ + *((__uint32_t *) __cp)++ = \ + __STRING_SMALL_GET32 (src, 0); \ + *((__uint32_t *) __cp) = \ + __STRING_SMALL_GET32 (src, 4); \ + break; \ + } \ + __retval; })) + __STRING_INLINE char * __strcpy_g (char *__dest, __const char *__src) { @@ -398,43 +461,56 @@ __strcpy_g (char *__dest, __const char *__src) /* In glibc itself we use this symbol for namespace reasons. */ # define stpcpy(dest, src) __stpcpy (dest, src) -__STRING_INLINE char * -__stpcpy_small (char *__dest, __const char __src[], size_t __srclen) -{ - register char *__tmp = __dest; - switch (__srclen) - { - case 7: - *((unsigned short int *) __tmp)++ = *((unsigned short int *) __src)++; - case 5: - *((unsigned int *) __tmp)++ = *((unsigned int *) __src)++; - *((unsigned char *) __tmp) = '\0'; - return __tmp; - - case 8: - *((unsigned int *) __tmp)++ = *((unsigned int *) __src)++; - case 4: - *((unsigned int *) __tmp) = *((unsigned int *) __src); - return __tmp + 3; - - case 6: - *((unsigned int *) __tmp)++ = *((unsigned int *) __src)++; - case 2: - *((unsigned short int *) __tmp) = *((unsigned short int *) __src); - return __tmp + 1; - - case 3: - *((unsigned short int *) __tmp)++ = *((unsigned short int *) __src)++; - case 1: - *((unsigned char *) __tmp) = '\0'; - return __tmp; - - default: - break; - } - /* This should never happen. */ - return NULL; -} +# define __stpcpy_small(dest, src, srclen) \ + (__extension__ ({ char *__cp = (dest); \ + switch (srclen) \ + { \ + case 1: \ + *((unsigned char *) __cp) = '\0'; \ + break; \ + case 2: \ + *((__uint16_t *) __cp) = \ + __STRING_SMALL_GET16 (src, 0); \ + ++cp; \ + break; \ + case 3: \ + *((__uint16_t *) __cp)++ = \ + __STRING_SMALL_GET16 (src, 0); \ + *((unsigned char *) __cp) = '\0'; \ + break; \ + case 4: \ + *((__uint32_t *) __cp) = \ + __STRING_SMALL_GET32 (src, 0); \ + cp += 3; \ + break; \ + case 5: \ + *((__uint32_t *) __cp)++ = \ + __STRING_SMALL_GET32 (src, 0); \ + *((unsigned char *) __cp) = '\0'; \ + break; \ + case 6: \ + *((__uint32_t *) __cp)++ = \ + __STRING_SMALL_GET32 (src, 0); \ + *((__uint16_t *) __cp) = \ + __STRING_SMALL_GET16 (src, 4); \ + ++cp; \ + break; \ + case 7: \ + *((__uint32_t *) __cp)++ = \ + __STRING_SMALL_GET32 (src, 0); \ + *((__uint16_t *) __cp)++ = \ + __STRING_SMALL_GET16 (src, 4); \ + *((unsigned char *) __cp) = '\0'; \ + break; \ + case 8: \ + *((__uint32_t *) __cp)++ = \ + __STRING_SMALL_GET32 (src, 0); \ + *((__uint32_t *) __cp) = \ + __STRING_SMALL_GET32 (src, 4); \ + cp += 3; \ + break; \ + } \ + __cp; })) __STRING_INLINE char * __mempcpy_by4 (char *__dest, __const char *__src, size_t __srclen) @@ -1458,4 +1534,4 @@ __strstr_g (__const char *__haystack, __const char *__needle) #undef __STRING_INLINE -#endif /* GNU CC */ +#endif /* use string inlines && GNU CC */ -- cgit v1.2.3