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