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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␉int n = 0;␊
135␉while (*s++) n++;␊
136␉return(n);␊
137}␊
138␊
139/*#endif*/␊
140␊
141/* NOTE: Moved from ntfs.c */␊
142int memcmp(const void *p1, const void *p2, size_t len)␊
143{␊
144 while (len--) {␊
145 if (*(const char*)(p1++) != *(const char*)(p2++))␊
146 return -1;␊
147 }␊
148 return 0;␊
149}␊
150␊
151int strcmp(const char * s1, const char * s2)␊
152{␊
153␉while (*s1 && (*s1 == *s2)) {␊
154␉␉s1++;␊
155␉␉s2++;␊
156␉}␊
157␉return (*s1 - *s2);␊
158}␊
159␊
160int strncmp(const char * s1, const char * s2, size_t len)␊
161{␊
162␉register int n = len;␊
163␉while (--n >= 0 && *s1 == *s2++)␊
164␉␉if (*s1++ == '\0')␊
165␉␉␉return(0);␊
166␉return(n<0 ? 0 : *s1 - *--s2);␊
167}␊
168␊
169char * strcpy(char * s1, const char * s2)␊
170{␊
171␉register char *ret = s1;␊
172␉while ((*s1++ = *s2++))␊
173␉␉continue;␊
174␉return ret;␊
175}␊
176␊
177char * strncpy(char * s1, const char * s2, size_t n)␊
178{␊
179␉register char *ret = s1;␊
180␉while (n && (*s1++ = *s2++))␊
181␉␉n--;␊
182␉return ret;␊
183}␊
184␊
185char * strstr(const char *in, const char *str)␊
186{␊
187 char c;␊
188 size_t len;␊
189␊
190 c = *str++;␊
191 if (!c)␊
192 return (char *) in;␉// Trivial empty string case␊
193␊
194 len = strlen(str);␊
195 do {␊
196 char sc;␊
197␊
198 do {␊
199 sc = *in++;␊
200 if (!sc)␊
201 return (char *) 0;␊
202 } while (sc != c);␊
203 } while (strncmp(in, str, len) != 0);␊
204␊
205 return (char *) (in - 1);␊
206}␊
207␊
208int ptol(const char *str)␊
209{␊
210␉register int c = *str;␊
211␊
212␉if (c <= '7' && c >= '0')␊
213␉␉c -= '0';␊
214␉else if (c <= 'h' && c >= 'a')␊
215␉␉c -= 'a';␊
216␉else c = 0;␊
217␉return c;␊
218}␊
219␊
220int atoi(const char *str)␊
221{␊
222␉register int sum = 0;␊
223␉while (*str == ' ' || *str == '\t')␊
224␉␉str++;␊
225␉while (*str >= '0' && *str <= '9') {␊
226␉␉sum *= 10;␊
227␉␉sum += *str++ - '0';␊
228␉}␊
229␉return sum;␊
230}␊
231␊
232char *strncat(char *s1, const char *s2, size_t n)␊
233{␊
234␉register char *ret = s1;␊
235␉while (*s1)␊
236␉␉s1++;␊
237␉while (n-- && *s2)␊
238␉␉*s1++ = *s2++;␊
239␉*s1 = '\0';␊
240␉return ret;␊
241}␊
242␊
243char *strcat(char *s1, const char *s2)␊
244{␊
245␉return(strncat(s1, s2, strlen(s2)));␊
246}␊
247␊
248char *strdup(const char *s1)␊
249{␊
250␉return strcpy(malloc(strlen(s1) + 1), s1);␊
251}␊
252␊
253#if STRNCASECMP␊
254int strncasecmp(const char *s1, const char *s2, size_t len)␊
255{␊
256␉register int n = len;␊
257␉while (--n >= 0 && tolower(*s1) == tolower(*s2++))␊
258␉␉if (*s1++ == '\0')␊
259␉␉␉return(0);␊
260␉return(n<0 ? 0 : tolower(*s1) - tolower(*--s2));␊
261}␊
262#endif␊
263␊
264char* strchr(const char *str, int c)␊
265{␊
266 do␊
267 {␊
268 if(*str == c)␊
269 return (char*)str;␊
270 }␊
271 while(*(str++));␊
272 ␊
273 return 0;␊
274} ␊
275 ␊
276char* strbreak(const char *str, char **next, long *len)␊
277{␊
278 char *start = (char*)str, *end;␊
279 bool quoted = false;␊
280 ␊
281 if ( !start || !len )␊
282 return 0;␊
283 ␊
284 *len = 0;␊
285 ␊
286 while ( isspace(*start) )␊
287 start++;␊
288 ␊
289 if (*start == '"')␊
290 {␊
291 start++;␊
292 ␊
293 end = strchr(start, '"');␊
294 if(end)␊
295 quoted = true;␊
296 else␊
297 end = strchr(start, '\0');␊
298 }␊
299 else␊
300 {␊
301 for ( end = start; *end && !isspace(*end); end++ )␊
302 {}␊
303 }␊
304 ␊
305 *len = end - start;␊
306 ␊
307 if(next)␊
308 *next = quoted ? end+1 : end;␊
309 ␊
310 return start;␊
311}␊
312␊
313/* COPYRIGHT NOTICE: checksum8 from AppleSMBIOS */␊
314uint8_t checksum8( void * start, unsigned int length )␊
315{␊
316 uint8_t csum = 0;␊
317 uint8_t * cp = (uint8_t *) start;␊
318 unsigned int i;␊
319␊
320 for ( i = 0; i < length; i++)␊
321 csum += *cp++;␊
322␊
323 return csum;␊
324}␊
325␊
326

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