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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␊
28void * 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␊
39void * 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␊
49void bcopy(const void * src, void * dst, size_t len)␊
50{␊
51␉memcpy(dst, src, len);␊
52}␊
53␊
54void bzero(void * dst, size_t len)␊
55{␊
56 memset(dst, 0, len);␊
57}␊
58␊
59void __bzero(void * dst, size_t len)␊
60{␊
61 memset(dst, 0, len);␊
62}␊
63␊
64#else␊
65void * 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␊
81void 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␊
95void 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␊
110void __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␊
132size_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 */␊
142int␊
143memcmp(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␊
152int␊
153strcmp(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 */␊
163int strncmp(const char * s1, const char * s2, size_t n)␊
164{␊
165␉if (!n)␊
166␉␉return 0;␊
167␉do {␊
168␉␉if (*s1 != *s2++)␊
169␉␉␉return (*(const unsigned char *)s1 - *(const unsigned char *)(s2 - 1));␊
170␉␉if (!*s1++)␊
171␉␉␉break;␊
172␉} while (--n);␊
173␉return 0;␊
174}␊
175␊
176char *␊
177strcpy(char * s1, const char * s2)␊
178{␊
179␉register char *ret = s1;␊
180␉while ((*s1++ = *s2++))␊
181␉␉continue;␊
182␉return ret;␊
183}␊
184␊
185char *␊
186stpcpy(char * s1, const char * s2)␊
187{␊
188␉while ((*s1++ = *s2++))␊
189␉␉continue;␊
190␉return --s1;␊
191}␊
192␊
193char *␊
194strncpy(char * s1, const char * s2, size_t n)␊
195{␊
196␉register char *ret = s1;␊
197␉while (n && (*s1++ = *s2++))␊
198␉--n;␊
199␊
200␉if (n > 0) {␊
201␉␉bzero(s1, n);␊
202␉}␊
203␉return ret;␊
204}␊
205␊
206char *␊
207stpncpy(char * s1, const char * s2, size_t n)␊
208{␊
209␉while (n && (*s1++ = *s2++))␊
210␉␉--n;␊
211␉if (n > 0) {␊
212␉␉bzero(s1, n);␊
213␉}␊
214␉return s1;␊
215}␊
216␊
217char *␊
218strstr(const char *in, const char *str)␊
219{␊
220 char c;␊
221 size_t len;␊
222␊
223 c = *str++;␊
224 if (!c)␊
225 return (char *) in;␉// Trivial empty string case␊
226␊
227 len = strlen(str);␊
228 do {␊
229 char sc;␊
230␊
231 do {␊
232 sc = *in++;␊
233 if (!sc)␊
234 return (char *) 0;␊
235 } while (sc != c);␊
236 } while (strncmp(in, str, len) != 0);␊
237␊
238 return (char *) (in - 1);␊
239}␊
240␊
241int␊
242ptol(const char *str)␊
243{␊
244␉register int c = *str;␊
245␊
246␉if (c <= '7' && c >= '0')␊
247␉␉c -= '0';␊
248␉else if (c <= 'h' && c >= 'a')␊
249␉␉c -= 'a';␊
250␉else c = 0;␊
251␉return c;␊
252}␊
253␊
254int␊
255atoi(const char *str)␊
256{␊
257␉register int sum = 0;␊
258␉while (*str == ' ' || *str == '\t')␊
259␉␉str++;␊
260␉while (*str >= '0' && *str <= '9') {␊
261␉␉sum *= 10;␊
262␉␉sum += *str++ - '0';␊
263␉}␊
264␉return sum;␊
265}␊
266␊
267char *strncat(char *s1, const char *s2, size_t n)␊
268{␊
269␉register char *ret = s1;␊
270␉while (*s1)␊
271␉␉s1++;␊
272␉while (n-- && (*s1++ = *s2++));␊
273␉return ret;␊
274}␊
275␊
276char *strcat(char *s1, const char *s2)␊
277{␊
278␉register char *ret = s1;␊
279␉while (*s1) {␊
280␉␉s1++;␊
281␉}␊
282␉while ((*s1++ = *s2++));␊
283␉return ret;␊
284}␊
285␊
286char *strdup(const char *s1)␊
287{␊
288␉return strcpy(malloc(strlen(s1) + 1), s1);␊
289}␊
290␊
291#if STRNCASECMP␊
292int strncasecmp(const char *s1, const char *s2, size_t len)␊
293{␊
294␉register int n = len;␊
295␉while (--n >= 0 && tolower(*s1) == tolower(*s2++))␊
296␉␉if (*s1++ == '\0')␊
297␉␉␉return(0);␊
298␉return(n<0 ? 0 : tolower(*s1) - tolower(*--s2));␊
299}␊
300#endif␊
301␊
302char* strchr(const char *str, int c)␊
303{␊
304 do␊
305 {␊
306 if(*str == c)␊
307 return (char*)str;␊
308 }␊
309 while(*(str++));␊
310 ␊
311 return 0;␊
312} ␊
313 ␊
314char* strbreak(const char *str, char **next, long *len)␊
315{␊
316 char *start = (char*)str, *end;␊
317 bool quoted = false;␊
318 ␊
319 if ( !start || !len )␊
320 return 0;␊
321 ␊
322 *len = 0;␊
323 ␊
324 while ( isspace(*start) )␊
325 start++;␊
326 ␊
327 if (*start == '"')␊
328 {␊
329 start++;␊
330␊
331 end = strchr(start, '"');␊
332 if(end)␊
333 quoted = true;␊
334 else␊
335 end = strchr(start, '\0');␊
336 }␊
337 else␊
338 {␊
339 for ( end = start; *end && !isspace(*end); end++ )␊
340 {}␊
341 }␊
342␊
343 *len = end - start;␊
344␊
345 if(next)␊
346 *next = quoted ? end+1 : end;␊
347␊
348 return start;␊
349}␊
350␊
351/* COPYRIGHT NOTICE: checksum8 from AppleSMBIOS */␊
352uint8_t checksum8( void * start, unsigned int length )␊
353{␊
354 uint8_t csum = 0;␊
355 uint8_t * cp = (uint8_t *) start;␊
356 unsigned int i;␊
357␊
358␉for ( i = 0; i < length; i++) {␊
359␉␉csum += *cp++;␊
360␉}␊
361␉return csum;␊
362}␊
363␊
364

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