1 /* vi: set sw=4 ts=4: */
3 * Copyright (C) 2000-2005 by Erik Andersen <andersen@codepoet.org>
5 * GNU Lesser General Public License version 2.1 or later.
8 #ifndef _LINUX_STRING_H_
9 #define _LINUX_STRING_H_
11 #include <dl-sysdep.h> /* for do_rem */
14 /* provide some sane defaults */
16 # define do_rem(result, n, base) ((result) = (n) % (base))
19 # define do_div_10(result, remain) ((result) /= 10)
22 static size_t _dl_strlen(const char *str);
23 static char *_dl_strcat(char *dst, const char *src);
24 static char *_dl_strcpy(char *dst, const char *src);
25 static int _dl_strcmp(const char *s1, const char *s2);
26 static int _dl_strncmp(const char *s1, const char *s2, size_t len);
27 static char *_dl_strchr(const char *str, int c);
28 static char *_dl_strrchr(const char *str, int c);
29 static char *_dl_strstr(const char *s1, const char *s2);
30 static void *_dl_memcpy(void *dst, const void *src, size_t len);
31 static int _dl_memcmp(const void *s1, const void *s2, size_t len);
32 static void *_dl_memset(void *str, int c, size_t len);
33 static char *_dl_get_last_path_component(char *path);
34 static char *_dl_simple_ltoa(char *local, unsigned long i);
35 static char *_dl_simple_ltoahex(char *local, unsigned long i);
38 #define NULL ((void *) 0)
41 static __always_inline size_t _dl_strlen(const char *str)
43 register const char *ptr = (char *) str-1;
49 static __always_inline char * _dl_strcat(char *dst, const char *src)
51 register char *ptr = dst-1;
57 while ((*++ptr = *++src) != 0)
62 static __always_inline char * _dl_strcpy(char *dst, const char *src)
64 register char *ptr = dst;
67 while ((*++dst = *++src) != 0)
73 static __always_inline int _dl_strcmp(const char *s1, const char *s2)
75 register unsigned char c1, c2;
78 c1 = (unsigned char) *++s1;
79 c2 = (unsigned char) *++s2;
87 static __always_inline int _dl_strncmp(const char *s1, const char *s2, size_t len)
89 register unsigned char c1 = '\0';
90 register unsigned char c2 = '\0';
94 c1 = (unsigned char) *++s1;
95 c2 = (unsigned char) *++s2;
96 if (c1 == '\0' || c1 != c2)
103 static __always_inline char * _dl_strchr(const char *str, int c)
108 if ((ch = *++str) == c)
116 static __always_inline char * _dl_strrchr(const char *str, int c)
118 register char *prev = 0;
119 register char *ptr = (char *) str-1;
121 while (*++ptr != '\0') {
130 static __always_inline char * _dl_strstr(const char *s1, const char *s2)
132 register const char *s = s1;
133 register const char *p = s2;
150 static __always_inline void * _dl_memcpy(void *dst, const void *src, size_t len)
152 register char *a = dst-1;
153 register const char *b = src-1;
162 static __always_inline int _dl_memcmp(const void *s1, const void *s2, size_t len)
164 unsigned char *c1 = (unsigned char *)s1-1;
165 unsigned char *c2 = (unsigned char *)s2-1;
176 /* Will generate smaller and faster code due to loop unrolling.*/
177 static __always_inline void * _dl_memset(void *to, int c, size_t n)
179 unsigned long chunks;
180 unsigned long *tmp_to;
181 unsigned char *tmp_char;
196 tmp_char = (unsigned char *)tmp_to;
203 static __always_inline void * _dl_memset(void *str, int c, size_t len)
205 register char *a = str;
214 static __always_inline char * _dl_get_last_path_component(char *path)
216 register char *ptr = path-1;
221 /* strip trailing slashes */
222 while (ptr != path && *--ptr == '/') {
226 /* find last component */
227 while (ptr != path && *--ptr != '/')
229 return ptr == path ? ptr : ptr+1;
232 /* Early on, we can't call printf, so use this to print out
233 * numbers using the SEND_STDERR() macro. Avoid using mod
234 * or using long division */
235 static __always_inline char * _dl_simple_ltoa(char *local, unsigned long i)
237 /* 20 digits plus a null terminator should be good for
238 * 64-bit or smaller ints (2^64 - 1)*/
239 char *p = &local[22];
250 static __always_inline char * _dl_simple_ltoahex(char *local, unsigned long i)
252 /* 16 digits plus a leading "0x" plus a null terminator,
253 * should be good for 64-bit or smaller ints */
254 char *p = &local[22];
261 *--p = 'a' - 0x0a + temp;
272 /* The following macros may be used in dl-startup.c to debug
273 * ldso before ldso has fixed itself up to make function calls */
275 /* On some (wierd) arches, none of this stuff works at all, so
276 * disable the whole lot... */
277 #if defined(__mips__)
279 # define SEND_STDERR(X)
280 # define SEND_ADDRESS_STDERR(X, add_a_newline)
281 # define SEND_NUMBER_STDERR(X, add_a_newline)
285 /* On some arches constant strings are referenced through the GOT.
286 * This requires that load_addr must already be defined... */
287 #if defined(mc68000) || defined(__arm__) || defined(__thumb__) || \
288 defined(__mips__) || defined(__sh__) || defined(__powerpc__) || \
289 defined(__avr32__) || defined(__xtensa__) || defined(__sparc__) || defined(__microblaze__)
290 # define CONSTANT_STRING_GOT_FIXUP(X) \
291 if ((X) < (const char *) load_addr) (X) += load_addr
292 # define NO_EARLY_SEND_STDERR
294 # define CONSTANT_STRING_GOT_FIXUP(X)
297 #define SEND_STDERR(X) \
299 const char *tmp1 = (X); \
300 CONSTANT_STRING_GOT_FIXUP(tmp1); \
301 _dl_write(2, tmp1, _dl_strlen(tmp1)); \
304 #define SEND_ADDRESS_STDERR(ADR, add_a_newline) \
306 char tmp[26], v, *tmp2, *tmp1 = tmp; \
307 unsigned long X = (unsigned long)(ADR); \
308 CONSTANT_STRING_GOT_FIXUP(tmp1); \
309 tmp2 = tmp1 + sizeof(tmp); \
311 if (add_a_newline) *--tmp2 = '\n'; \
317 *--tmp2 = 'a' - 0x0a + v; \
322 _dl_write(2, tmp2, tmp1 - tmp2 + sizeof(tmp) - 1); \
325 #define SEND_NUMBER_STDERR(NUM, add_a_newline) \
327 char tmp[26], v, *tmp2, *tmp1 = tmp; \
328 unsigned long X = (unsigned long)(NUM); \
329 CONSTANT_STRING_GOT_FIXUP(tmp1); \
330 tmp2 = tmp1 + sizeof(tmp); \
332 if (add_a_newline) *--tmp2 = '\n'; \
334 do_rem(v, (X), 10); \
338 _dl_write(2, tmp2, tmp1 - tmp2 + sizeof(tmp) - 1); \
342 /* Some targets may have to override this to something that doesn't
343 * reference constant strings through the GOT. This macro should be
344 * preferred over SEND_STDERR for constant strings before we complete
347 #ifndef SEND_EARLY_STDERR
348 # define SEND_EARLY_STDERR(S) SEND_STDERR(S)
350 # define EARLY_STDERR_SPECIAL
353 #ifdef __SUPPORT_LD_DEBUG_EARLY__
354 # define SEND_STDERR_DEBUG(X) SEND_STDERR(X)
355 # define SEND_EARLY_STDERR_DEBUG(X) SEND_EARLY_STDERR(X)
356 # define SEND_NUMBER_STDERR_DEBUG(X, add_a_newline) SEND_NUMBER_STDERR(X, add_a_newline)
357 # define SEND_ADDRESS_STDERR_DEBUG(X, add_a_newline) SEND_ADDRESS_STDERR(X, add_a_newline)
359 # define SEND_STDERR_DEBUG(X)
360 # define SEND_EARLY_STDERR_DEBUG(X)
361 # define SEND_NUMBER_STDERR_DEBUG(X, add_a_newline)
362 # define SEND_ADDRESS_STDERR_DEBUG(X, add_a_newline)