This source file includes following definitions.
- strcpy
- strncpy
- strcat
- strncat
- strcmp
- strncmp
- strchr
- strrchr
- strspn
- strcspn
- strpbrk
- strstr
- strlen
- strtok
- memcpy
- memmove
- memcmp
- memchr
- memset
1 #ifndef _LINUX_STRING_H_
2 #define _LINUX_STRING_H_
3
4 #include <linux/types.h>
5
6 #ifndef NULL
7 #define NULL ((void *) 0)
8 #endif
9
10 #ifdef __cplusplus
11 extern "C" {
12 #endif
13
14
15
16
17
18
19
20
21
22
23
24
25
26 extern inline char * strcpy(char * dest,const char *src)
27 {
28 __asm__ __volatile__(
29 "cld\n"
30 "1:\tlodsb\n\t"
31 "stosb\n\t"
32 "testb %%al,%%al\n\t"
33 "jne 1b"
34 :
35 :"S" (src),"D" (dest):"si","di","ax","memory");
36 return dest;
37 }
38
39 extern inline char * strncpy(char * dest,const char *src,size_t count)
40 {
41 __asm__ __volatile__(
42 "cld\n"
43 "1:\tdecl %2\n\t"
44 "js 2f\n\t"
45 "lodsb\n\t"
46 "stosb\n\t"
47 "testb %%al,%%al\n\t"
48 "jne 1b\n\t"
49 "rep\n\t"
50 "stosb\n"
51 "2:"
52 :
53 :"S" (src),"D" (dest),"c" (count):"si","di","ax","cx","memory");
54 return dest;
55 }
56
57 extern inline char * strcat(char * dest,const char * src)
58 {
59 __asm__ __volatile__(
60 "cld\n\t"
61 "repne\n\t"
62 "scasb\n\t"
63 "decl %1\n"
64 "1:\tlodsb\n\t"
65 "stosb\n\t"
66 "testb %%al,%%al\n\t"
67 "jne 1b"
68 :
69 :"S" (src),"D" (dest),"a" (0),"c" (0xffffffff):"si","di","ax","cx");
70 return dest;
71 }
72
73 extern inline char * strncat(char * dest,const char * src,size_t count)
74 {
75 __asm__ __volatile__(
76 "cld\n\t"
77 "repne\n\t"
78 "scasb\n\t"
79 "decl %1\n\t"
80 "movl %4,%3\n"
81 "1:\tdecl %3\n\t"
82 "js 2f\n\t"
83 "lodsb\n\t"
84 "stosb\n\t"
85 "testb %%al,%%al\n\t"
86 "jne 1b\n"
87 "2:\txorl %2,%2\n\t"
88 "stosb"
89 :
90 :"S" (src),"D" (dest),"a" (0),"c" (0xffffffff),"g" (count)
91 :"si","di","ax","cx","memory");
92 return dest;
93 }
94
95 extern inline int strcmp(const char * cs,const char * ct)
96 {
97 register int __res;
98 __asm__ __volatile__(
99 "cld\n"
100 "1:\tlodsb\n\t"
101 "scasb\n\t"
102 "jne 2f\n\t"
103 "testb %%al,%%al\n\t"
104 "jne 1b\n\t"
105 "xorl %%eax,%%eax\n\t"
106 "jmp 3f\n"
107 "2:\tsbbl %%eax,%%eax\n\t"
108 "orb $1,%%eax\n"
109 "3:"
110 :"=a" (__res):"S" (cs),"D" (ct):"si","di");
111 return __res;
112 }
113
114 extern inline int strncmp(const char * cs,const char * ct,size_t count)
115 {
116 register int __res;
117 __asm__ __volatile__(
118 "cld\n"
119 "1:\tdecl %3\n\t"
120 "js 2f\n\t"
121 "lodsb\n\t"
122 "scasb\n\t"
123 "jne 3f\n\t"
124 "testb %%al,%%al\n\t"
125 "jne 1b\n"
126 "2:\txorl %%eax,%%eax\n\t"
127 "jmp 4f\n"
128 "3:\tsbbl %%eax,%%eax\n\t"
129 "orb $1,%%al\n"
130 "4:"
131 :"=a" (__res):"S" (cs),"D" (ct),"c" (count):"si","di","cx");
132 return __res;
133 }
134
135 extern inline char * strchr(const char * s,char c)
136 {
137 register char * __res;
138 __asm__ __volatile__(
139 "cld\n\t"
140 "movb %%al,%%ah\n"
141 "1:\tlodsb\n\t"
142 "cmpb %%ah,%%al\n\t"
143 "je 2f\n\t"
144 "testb %%al,%%al\n\t"
145 "jne 1b\n\t"
146 "movl $1,%1\n"
147 "2:\tmovl %1,%0\n\t"
148 "decl %0"
149 :"=a" (__res):"S" (s),"0" (c):"si");
150 return __res;
151 }
152
153 extern inline char * strrchr(const char * s,char c)
154 {
155 register char * __res;
156 __asm__ __volatile__(
157 "cld\n\t"
158 "movb %%al,%%ah\n"
159 "1:\tlodsb\n\t"
160 "cmpb %%ah,%%al\n\t"
161 "jne 2f\n\t"
162 "leal -1(%%esi),%0\n"
163 "2:\ttestb %%al,%%al\n\t"
164 "jne 1b"
165 :"=d" (__res):"0" (0),"S" (s),"a" (c):"ax","si");
166 return __res;
167 }
168
169 extern inline size_t strspn(const char * cs, const char * ct)
170 {
171 register char * __res;
172 __asm__ __volatile__(
173 "cld\n\t"
174 "movl %4,%%edi\n\t"
175 "repne\n\t"
176 "scasb\n\t"
177 "notl %%ecx\n\t"
178 "decl %%ecx\n\t"
179 "movl %%ecx,%%edx\n"
180 "1:\tlodsb\n\t"
181 "testb %%al,%%al\n\t"
182 "je 2f\n\t"
183 "movl %4,%%edi\n\t"
184 "movl %%edx,%%ecx\n\t"
185 "repne\n\t"
186 "scasb\n\t"
187 "je 1b\n"
188 "2:\tdecl %0"
189 :"=S" (__res):"a" (0),"c" (0xffffffff),"0" (cs),"g" (ct)
190 :"ax","cx","dx","di");
191 return __res-cs;
192 }
193
194 extern inline size_t strcspn(const char * cs, const char * ct)
195 {
196 register char * __res;
197 __asm__ __volatile__(
198 "cld\n\t"
199 "movl %4,%%edi\n\t"
200 "repne\n\t"
201 "scasb\n\t"
202 "notl %%ecx\n\t"
203 "decl %%ecx\n\t"
204 "movl %%ecx,%%edx\n"
205 "1:\tlodsb\n\t"
206 "testb %%al,%%al\n\t"
207 "je 2f\n\t"
208 "movl %4,%%edi\n\t"
209 "movl %%edx,%%ecx\n\t"
210 "repne\n\t"
211 "scasb\n\t"
212 "jne 1b\n"
213 "2:\tdecl %0"
214 :"=S" (__res):"a" (0),"c" (0xffffffff),"0" (cs),"g" (ct)
215 :"ax","cx","dx","di");
216 return __res-cs;
217 }
218
219 extern inline char * strpbrk(const char * cs,const char * ct)
220 {
221 register char * __res;
222 __asm__ __volatile__(
223 "cld\n\t"
224 "movl %4,%%edi\n\t"
225 "repne\n\t"
226 "scasb\n\t"
227 "notl %%ecx\n\t"
228 "decl %%ecx\n\t"
229 "movl %%ecx,%%edx\n"
230 "1:\tlodsb\n\t"
231 "testb %%al,%%al\n\t"
232 "je 2f\n\t"
233 "movl %4,%%edi\n\t"
234 "movl %%edx,%%ecx\n\t"
235 "repne\n\t"
236 "scasb\n\t"
237 "jne 1b\n\t"
238 "decl %0\n\t"
239 "jmp 3f\n"
240 "2:\txorl %0,%0\n"
241 "3:"
242 :"=S" (__res):"a" (0),"c" (0xffffffff),"0" (cs),"g" (ct)
243 :"ax","cx","dx","di");
244 return __res;
245 }
246
247 extern inline char * strstr(const char * cs,const char * ct)
248 {
249 register char * __res;
250 __asm__ __volatile__(
251 "cld\n\t" \
252 "movl %4,%%edi\n\t"
253 "repne\n\t"
254 "scasb\n\t"
255 "notl %%ecx\n\t"
256 "decl %%ecx\n\t"
257 "movl %%ecx,%%edx\n"
258 "1:\tmovl %4,%%edi\n\t"
259 "movl %%esi,%%eax\n\t"
260 "movl %%edx,%%ecx\n\t"
261 "repe\n\t"
262 "cmpsb\n\t"
263 "je 2f\n\t"
264 "xchgl %%eax,%%esi\n\t"
265 "incl %%esi\n\t"
266 "cmpb $0,-1(%%eax)\n\t"
267 "jne 1b\n\t"
268 "xorl %%eax,%%eax\n\t"
269 "2:"
270 :"=a" (__res):"0" (0),"c" (0xffffffff),"S" (cs),"g" (ct)
271 :"cx","dx","di","si");
272 return __res;
273 }
274
275 extern inline size_t strlen(const char * s)
276 {
277 register int __res;
278 __asm__ __volatile__(
279 "cld\n\t"
280 "repne\n\t"
281 "scasb\n\t"
282 "notl %0\n\t"
283 "decl %0"
284 :"=c" (__res):"D" (s),"a" (0),"0" (0xffffffff):"di");
285 return __res;
286 }
287
288 extern char * ___strtok;
289
290 extern inline char * strtok(char * s,const char * ct)
291 {
292 register char * __res;
293 __asm__ __volatile__(
294 "testl %1,%1\n\t"
295 "jne 1f\n\t"
296 "testl %0,%0\n\t"
297 "je 8f\n\t"
298 "movl %0,%1\n"
299 "1:\txorl %0,%0\n\t"
300 "movl $-1,%%ecx\n\t"
301 "xorl %%eax,%%eax\n\t"
302 "cld\n\t"
303 "movl %4,%%edi\n\t"
304 "repne\n\t"
305 "scasb\n\t"
306 "notl %%ecx\n\t"
307 "decl %%ecx\n\t"
308 "je 7f\n\t"
309 "movl %%ecx,%%edx\n"
310 "2:\tlodsb\n\t"
311 "testb %%al,%%al\n\t"
312 "je 7f\n\t"
313 "movl %4,%%edi\n\t"
314 "movl %%edx,%%ecx\n\t"
315 "repne\n\t"
316 "scasb\n\t"
317 "je 2b\n\t"
318 "decl %1\n\t"
319 "cmpb $0,(%1)\n\t"
320 "je 7f\n\t"
321 "movl %1,%0\n"
322 "3:\tlodsb\n\t"
323 "testb %%al,%%al\n\t"
324 "je 5f\n\t"
325 "movl %4,%%edi\n\t"
326 "movl %%edx,%%ecx\n\t"
327 "repne\n\t"
328 "scasb\n\t"
329 "jne 3b\n\t"
330 "decl %1\n\t"
331 "cmpb $0,(%1)\n\t"
332 "je 5f\n\t"
333 "movb $0,(%1)\n\t"
334 "incl %1\n\t"
335 "jmp 6f\n"
336 "5:\txorl %1,%1\n"
337 "6:\tcmpb $0,(%0)\n\t"
338 "jne 7f\n\t"
339 "xorl %0,%0\n"
340 "7:\ttestl %0,%0\n\t"
341 "jne 8f\n\t"
342 "movl %0,%1\n"
343 "8:"
344 :"=b" (__res),"=S" (___strtok)
345 :"0" (___strtok),"1" (s),"g" (ct)
346 :"ax","cx","dx","di","memory");
347 return __res;
348 }
349
350 extern inline void * memcpy(void * to, const void * from, size_t n)
351 {
352 __asm__ __volatile__(
353 "cld\n\t"
354 "movl %%edx, %%ecx\n\t"
355 "shrl $2,%%ecx\n\t"
356 "rep ; movsl\n\t"
357 "testb $1,%%dl\n\t"
358 "je 1f\n\t"
359 "movsb\n"
360 "1:\ttestb $2,%%dl\n\t"
361 "je 2f\n\t"
362 "movsw\n"
363 "2:\n"
364 :
365 :"d" (n),"D" ((long) to),"S" ((long) from)
366 : "cx","di","si","memory");
367 return (to);
368 }
369
370 extern inline void * memmove(void * dest,const void * src, size_t n)
371 {
372 if (dest<src)
373 __asm__ __volatile__(
374 "cld\n\t"
375 "rep\n\t"
376 "movsb"
377 :
378 :"c" (n),"S" (src),"D" (dest)
379 :"cx","si","di");
380 else
381 __asm__ __volatile__(
382 "std\n\t"
383 "rep\n\t"
384 "movsb\n\t"
385 "cld"
386 :
387 :"c" (n),
388 "S" (n-1+(const char *)src),
389 "D" (n-1+(char *)dest)
390 :"cx","si","di","memory");
391 return dest;
392 }
393
394 extern inline int memcmp(const void * cs,const void * ct,size_t count)
395 {
396 register int __res;
397 __asm__ __volatile__(
398 "cld\n\t"
399 "repe\n\t"
400 "cmpsb\n\t"
401 "je 1f\n\t"
402 "sbbl %%eax,%%eax\n\t"
403 "orb $1,%%al\n"
404 "1:"
405 :"=a" (__res):"0" (0),"S" (cs),"D" (ct),"c" (count)
406 :"si","di","cx");
407 return __res;
408 }
409
410 extern inline void * memchr(const void * cs,char c,size_t count)
411 {
412 register void * __res;
413 if (!count)
414 return NULL;
415 __asm__ __volatile__(
416 "cld\n\t"
417 "repne\n\t"
418 "scasb\n\t"
419 "je 1f\n\t"
420 "movl $1,%0\n"
421 "1:\tdecl %0"
422 :"=D" (__res):"a" (c),"D" (cs),"c" (count)
423 :"cx");
424 return __res;
425 }
426
427 extern inline void * memset(void * s,char c,size_t count)
428 {
429 __asm__ __volatile__(
430 "cld\n\t"
431 "rep\n\t"
432 "stosb"
433 :
434 :"a" (c),"D" (s),"c" (count)
435 :"cx","di","memory");
436 return s;
437 }
438
439 #ifdef __cplusplus
440 }
441 #endif
442
443 #endif
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*/
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