1 | /*␊ |
2 | * Copyright (c) 1999-2003 Apple Computer, Inc. All rights reserved.␊ |
3 | *␊ |
4 | * @APPLE_LICENSE_HEADER_START@␊ |
5 | * ␊ |
6 | * Portions Copyright (c) 1999-2003 Apple Computer, Inc. All Rights␊ |
7 | * Reserved. This file contains Original Code and/or Modifications of␊ |
8 | * Original Code as defined in and that are subject to the Apple Public␊ |
9 | * Source License Version 2.0 (the "License"). You may not use this file␊ |
10 | * except in compliance with the License. Please obtain a copy of the␊ |
11 | * License at http://www.apple.com/publicsource and read it before using␊ |
12 | * this file.␊ |
13 | * ␊ |
14 | * The Original Code and all software distributed under the License are␊ |
15 | * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER␊ |
16 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,␊ |
17 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,␊ |
18 | * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT. Please see the␊ |
19 | * License for the specific language governing rights and limitations␊ |
20 | * under the License.␊ |
21 | * ␊ |
22 | * @APPLE_LICENSE_HEADER_END@␊ |
23 | */␊ |
24 | /* string operations */␊ |
25 | ␊ |
26 | #include "libsa.h"␊ |
27 | ␊ |
28 | void *memset(void * dst, int val, size_t len)␊ |
29 | {␊ |
30 | ␉asm volatile ( "rep; stosb"␊ |
31 | ␉␉: "=c" (len), "=D" (dst)␊ |
32 | ␉␉: "0" (len), "1" (dst), "a" (val)␊ |
33 | ␉␉: "memory" );␊ |
34 | ␊ |
35 | ␉return dst;␊ |
36 | }␊ |
37 | ␊ |
38 | #if 0␊ |
39 | void * memcpy(void * dst, const void * src, size_t len)␊ |
40 | {␊ |
41 | ␉asm volatile ( "rep; movsb"␊ |
42 | ␉␉: "=c" (len), "=D" (dst), "=S" (src)␊ |
43 | ␉␉: "0" (len), "1" (dst), "2" (src)␊ |
44 | ␉␉: "memory" );␊ |
45 | ␊ |
46 | ␉return dst;␊ |
47 | }␊ |
48 | ␊ |
49 | void bcopy(const void * src, void * dst, size_t len)␊ |
50 | {␊ |
51 | ␉memcpy(dst, src, len);␊ |
52 | }␊ |
53 | ␊ |
54 | void bzero(void * dst, size_t len)␊ |
55 | {␊ |
56 | ␉memset(dst, 0, len);␊ |
57 | }␊ |
58 | ␊ |
59 | void __bzero(void * dst, size_t len)␊ |
60 | {␊ |
61 | ␉memset(dst, 0, len);␊ |
62 | }␊ |
63 | ␊ |
64 | #else␊ |
65 | void * memcpy(void * dst, const void * src, size_t len)␊ |
66 | {␊ |
67 | ␉asm volatile ( "cld \n\t"␊ |
68 | ␉␉"movl %%ecx, %%edx \n\t"␊ |
69 | ␉␉"shrl $2, %%ecx \n\t"␊ |
70 | ␉␉"rep; movsl \n\t"␊ |
71 | ␉␉"movl %%edx, %%ecx \n\t"␊ |
72 | ␉␉"andl $3, %%ecx \n\t"␊ |
73 | ␉␉"rep; movsb \n\t"␊ |
74 | ␉␉: "=D" (dst)␊ |
75 | ␉␉: "c" (len), "D" (dst), "S" (src)␊ |
76 | ␉␉: "memory", "%edx" );␊ |
77 | ␊ |
78 | ␉return dst;␊ |
79 | }␊ |
80 | ␊ |
81 | void bcopy(const void * src, void * dst, size_t len)␊ |
82 | {␊ |
83 | ␉asm volatile ( "cld \n\t"␊ |
84 | ␉␉"movl %%ecx, %%edx \n\t"␊ |
85 | ␉␉"shrl $2, %%ecx \n\t"␊ |
86 | ␉␉"rep; movsl \n\t"␊ |
87 | ␉␉"movl %%edx, %%ecx \n\t"␊ |
88 | ␉␉"andl $3, %%ecx \n\t"␊ |
89 | ␉␉"rep; movsb \n\t"␊ |
90 | ␉␉:␊ |
91 | ␉␉: "c" (len), "D" (dst), "S" (src)␊ |
92 | ␉␉: "memory", "%edx" );␊ |
93 | }␊ |
94 | ␊ |
95 | void bzero(void * dst, size_t len)␊ |
96 | {␊ |
97 | ␉asm volatile ( "xorl %%eax, %%eax \n\t"␊ |
98 | ␉␉"cld \n\t"␊ |
99 | ␉␉"movl %%ecx, %%edx \n\t"␊ |
100 | ␉␉"shrl $2, %%ecx \n\t"␊ |
101 | ␉␉"rep; stosl \n\t"␊ |
102 | ␉␉"movl %%edx, %%ecx \n\t"␊ |
103 | ␉␉"andl $3, %%ecx \n\t"␊ |
104 | ␉␉"rep; stosb \n\t"␊ |
105 | ␉␉:␊ |
106 | ␉␉: "c" (len), "D" (dst)␊ |
107 | ␉␉: "memory", "%eax" );␊ |
108 | }␊ |
109 | ␊ |
110 | void __bzero(void * dst, size_t len)␊ |
111 | {␊ |
112 | ␉asm volatile ( "xorl %%eax, %%eax \n\t"␊ |
113 | ␉␉"cld \n\t"␊ |
114 | ␉␉"movl %%ecx, %%edx \n\t"␊ |
115 | ␉␉"shrl $2, %%ecx \n\t"␊ |
116 | ␉␉"rep; stosl \n\t"␊ |
117 | ␉␉"movl %%edx, %%ecx \n\t"␊ |
118 | ␉␉"andl $3, %%ecx \n\t"␊ |
119 | ␉␉"rep; stosb \n\t"␊ |
120 | ␉␉:␊ |
121 | ␉␉: "c" (len), "D" (dst)␊ |
122 | ␉␉: "memory", "%eax" );␊ |
123 | }␊ |
124 | ␊ |
125 | #endif␊ |
126 | ␊ |
127 | /* #if DONT_USE_GCC_BUILT_IN_STRLEN */␊ |
128 | ␊ |
129 | #define tolower(c) ((int)((c) & ~0x20))␊ |
130 | #define toupper(c) ((int)((c) | 0x20))␊ |
131 | ␊ |
132 | size_t strlen(const char * s)␊ |
133 | {␊ |
134 | ␉const char* save = s;␊ |
135 | ␉while (*s++);␊ |
136 | ␉return (--s) - save;␊ |
137 | }␊ |
138 | ␊ |
139 | /*#endif*/␊ |
140 | ␊ |
141 | /* NOTE: Moved from ntfs.c */␊ |
142 | int␊ |
143 | memcmp(const void *p1, const void *p2, size_t len)␊ |
144 | {␊ |
145 | while (len--) {␊ |
146 | if (*(const char*)(p1++) != *(const char*)(p2++))␊ |
147 | return -1;␊ |
148 | }␊ |
149 | return 0;␊ |
150 | }␊ |
151 | ␊ |
152 | int␊ |
153 | strcmp(const char * s1, const char * s2)␊ |
154 | {␊ |
155 | ␉while (*s1 && (*s1 == *s2)) {␊ |
156 | ␉␉s1++;␊ |
157 | ␉␉s2++;␊ |
158 | ␉}␊ |
159 | ␉return (*s1 - *s2);␊ |
160 | }␊ |
161 | ␊ |
162 | /* Derived from FreeBSD source */␊ |
163 | int strncmp(const char * s1, const char * s2, size_t n)␊ |
164 | {␊ |
165 | ␉if (!n)␊ |
166 | ␉␉return 0;␊ |
167 | ␉do {␊ |
168 | ␉␉if (*s1 != *s2++)␊ |
169 | ␉␉{␊ |
170 | ␉␉␉return (*(const unsigned char *)s1 - *(const unsigned char *)(s2 - 1));␊ |
171 | ␉␉}␊ |
172 | ␊ |
173 | ␉␉if (!*s1++)␊ |
174 | ␉␉{␊ |
175 | ␉␉␉break;␊ |
176 | ␉␉}␊ |
177 | ␉} while (--n);␊ |
178 | ␉return 0;␊ |
179 | }␊ |
180 | ␊ |
181 | char *strcpy(char *s1, const char *s2)␊ |
182 | {␊ |
183 | ␉register char *ret = s1;␊ |
184 | ␉while ((*s1++ = *s2++))␊ |
185 | ␉␉continue;␊ |
186 | ␉return ret;␊ |
187 | }␊ |
188 | ␊ |
189 | char *stpcpy(char *s1, const char *s2)␊ |
190 | {␊ |
191 | ␉while ((*s1++ = *s2++))␊ |
192 | ␉{␊ |
193 | ␉␉continue;␊ |
194 | ␉}␊ |
195 | ␉return --s1;␊ |
196 | }␊ |
197 | ␊ |
198 | char *strncpy(char *s1, const char *s2, size_t n)␊ |
199 | {␊ |
200 | ␉register char *ret = s1;␊ |
201 | ␉while (n && (*s1++ = *s2++))␊ |
202 | ␉--n;␊ |
203 | ␊ |
204 | ␉if (n > 0) {␊ |
205 | ␉␉bzero(s1, n);␊ |
206 | ␉}␊ |
207 | ␉return ret;␊ |
208 | }␊ |
209 | ␊ |
210 | char *stpncpy(char *s1, const char *s2, size_t n)␊ |
211 | {␊ |
212 | ␉while (n && (*s1++ = *s2++))␊ |
213 | ␉␉--n;␊ |
214 | ␉if (n > 0)␊ |
215 | ␉{␊ |
216 | ␉␉bzero(s1, n);␊ |
217 | ␉}␊ |
218 | ␉return s1;␊ |
219 | }␊ |
220 | ␊ |
221 | char *strstr(const char *in, const char *str)␊ |
222 | {␊ |
223 | char c;␊ |
224 | size_t len;␊ |
225 | ␊ |
226 | c = *str++;␊ |
227 | if (!c)␊ |
228 | return (char *) in;␉// Trivial empty string case␊ |
229 | ␊ |
230 | len = strlen(str);␊ |
231 | do {␊ |
232 | char sc;␊ |
233 | ␊ |
234 | do {␊ |
235 | sc = *in++;␊ |
236 | if (!sc)␊ |
237 | return (char *) 0;␊ |
238 | } while (sc != c);␊ |
239 | } while (strncmp(in, str, len) != 0);␊ |
240 | ␊ |
241 | return (char *) (in - 1);␊ |
242 | }␊ |
243 | ␊ |
244 | int ptol(const char *str)␊ |
245 | {␊ |
246 | ␉register int c = *str;␊ |
247 | ␊ |
248 | ␉if (c <= '7' && c >= '0')␊ |
249 | ␉␉c -= '0';␊ |
250 | ␉else if (c <= 'h' && c >= 'a')␊ |
251 | ␉␉c -= 'a';␊ |
252 | ␉else c = 0;␊ |
253 | ␉return c;␊ |
254 | }␊ |
255 | ␊ |
256 | int atoi(const char *str)␊ |
257 | {␊ |
258 | ␉register int sum = 0;␊ |
259 | ␉while (*str == ' ' || *str == '\t')␊ |
260 | ␉␉str++;␊ |
261 | ␉while (*str >= '0' && *str <= '9') {␊ |
262 | ␉␉sum *= 10;␊ |
263 | ␉␉sum += *str++ - '0';␊ |
264 | ␉}␊ |
265 | ␉return sum;␊ |
266 | }␊ |
267 | /*␊ |
268 | * Appends src to string dst of size siz (unlike strncat, siz is the␊ |
269 | * full size of dst, not space left). At most siz-1 characters␊ |
270 | * will be copied. Always NUL terminates (unless siz <= strlen(dst)).␊ |
271 | * Returns strlen(src) + MIN(siz, strlen(initial dst)).␊ |
272 | * If retval >= siz, truncation occurred.␊ |
273 | */␊ |
274 | size_t strlcat(char *dst, const char *src, size_t siz)␊ |
275 | {␊ |
276 | ␉char *d = dst;␊ |
277 | ␉const char *s = src;␊ |
278 | ␉size_t n = siz;␊ |
279 | ␉size_t dlen;␊ |
280 | ␊ |
281 | ␉/* Find the end of dst and adjust bytes left but don't go past end */␊ |
282 | ␉while (n-- != 0 && *d != '\0')␊ |
283 | ␉{␊ |
284 | ␉␉d++;␊ |
285 | ␉}␊ |
286 | ␊ |
287 | ␉dlen = d - dst;␊ |
288 | ␉n = siz - dlen;␊ |
289 | ␊ |
290 | ␉if (n == 0)␊ |
291 | ␉{␊ |
292 | ␉␉return(dlen + strlen(s));␊ |
293 | ␉}␊ |
294 | ␊ |
295 | ␉while (*s != '\0')␊ |
296 | ␉{␊ |
297 | ␉␉if (n != 1)␊ |
298 | ␉␉{␊ |
299 | ␉␉␉*d++ = *s;␊ |
300 | ␉␉␉n--;␊ |
301 | ␉␉}␊ |
302 | ␉␉s++;␊ |
303 | ␉}␊ |
304 | ␉*d = '\0';␊ |
305 | ␊ |
306 | ␉return(dlen + (s - src)); /* count does not include NUL */␊ |
307 | }␊ |
308 | ␊ |
309 | char *strncat(char *s1, const char *s2, size_t n)␊ |
310 | {␊ |
311 | ␉register char *ret = s1;␊ |
312 | ␉while (*s1)␊ |
313 | ␉␉s1++;␊ |
314 | ␉while (n-- && (*s1++ = *s2++));␊ |
315 | ␉return ret;␊ |
316 | }␊ |
317 | ␊ |
318 | char *strcat(char *s1, const char *s2)␊ |
319 | {␊ |
320 | ␉register char *ret = s1;␊ |
321 | ␉while (*s1)␊ |
322 | ␉{␊ |
323 | ␉␉s1++;␊ |
324 | ␉}␊ |
325 | ␉while ((*s1++ = *s2++));␊ |
326 | ␉return ret;␊ |
327 | }␊ |
328 | ␊ |
329 | char *strdup(const char *s1)␊ |
330 | {␊ |
331 | ␉return strcpy(malloc(strlen(s1) + 1), s1);␊ |
332 | }␊ |
333 | ␊ |
334 | #if STRNCASECMP␊ |
335 | int strncasecmp(const char *s1, const char *s2, size_t len)␊ |
336 | {␊ |
337 | ␉register int n = len;␊ |
338 | ␉while (--n >= 0 && tolower(*s1) == tolower(*s2++))␊ |
339 | ␉␉if (*s1++ == '\0')␊ |
340 | ␉␉␉return(0);␊ |
341 | ␉return(n<0 ? 0 : tolower(*s1) - tolower(*--s2));␊ |
342 | }␊ |
343 | #endif␊ |
344 | ␊ |
345 | char *strchr(const char *str, int c)␊ |
346 | {␊ |
347 | do␊ |
348 | {␊ |
349 | if(*str == c)␊ |
350 | return (char*)str;␊ |
351 | }␊ |
352 | while(*(str++));␊ |
353 | ␊ |
354 | return 0;␊ |
355 | }␊ |
356 | ␊ |
357 | char *strbreak(const char *str, char **next, long *len)␊ |
358 | {␊ |
359 | char *start = (char*)str, *end;␊ |
360 | bool quoted = false;␊ |
361 | ␊ |
362 | if ( !start || !len )␊ |
363 | return 0;␊ |
364 | ␊ |
365 | *len = 0;␊ |
366 | ␊ |
367 | while ( isspace(*start) )␊ |
368 | start++;␊ |
369 | ␊ |
370 | if (*start == '"')␊ |
371 | {␊ |
372 | start++;␊ |
373 | ␊ |
374 | end = strchr(start, '"');␊ |
375 | if(end)␊ |
376 | quoted = true;␊ |
377 | else␊ |
378 | end = strchr(start, '\0');␊ |
379 | }␊ |
380 | else␊ |
381 | {␊ |
382 | for ( end = start; *end && !isspace(*end); end++ )␊ |
383 | {}␊ |
384 | }␊ |
385 | ␊ |
386 | *len = end - start;␊ |
387 | ␊ |
388 | if(next)␊ |
389 | *next = quoted ? end+1 : end;␊ |
390 | ␊ |
391 | return start;␊ |
392 | }␊ |
393 | ␊ |
394 | /* COPYRIGHT NOTICE: checksum8 from AppleSMBIOS */␊ |
395 | uint8_t checksum8( void *start, unsigned int length )␊ |
396 | {␊ |
397 | uint8_t csum = 0;␊ |
398 | uint8_t * cp = (uint8_t *) start;␊ |
399 | unsigned int i;␊ |
400 | ␊ |
401 | ␉for ( i = 0; i < length; i++)␊ |
402 | ␉{␊ |
403 | ␉␉csum += *cp++;␊ |
404 | ␉}␊ |
405 | ␉return csum;␊ |
406 | }␊ |
407 | ␊ |
408 | |