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