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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␊
59#else␊
60void * memcpy(void * dst, const void * src, size_t len)␊
61{␊
62 asm volatile ( "cld \n\t"␊
63 "movl %%ecx, %%edx \n\t"␊
64 "shrl $2, %%ecx \n\t"␊
65 "rep; movsl \n\t"␊
66 "movl %%edx, %%ecx \n\t"␊
67 "andl $3, %%ecx \n\t"␊
68 "rep; movsb \n\t"␊
69 : "=D" (dst)␊
70 : "c" (len), "D" (dst), "S" (src)␊
71 : "memory", "%edx" );␊
72␊
73 return dst;␊
74}␊
75␊
76void bcopy(const void * src, void * dst, size_t len)␊
77{␊
78 asm volatile ( "cld \n\t"␊
79 "movl %%ecx, %%edx \n\t"␊
80 "shrl $2, %%ecx \n\t"␊
81 "rep; movsl \n\t"␊
82 "movl %%edx, %%ecx \n\t"␊
83 "andl $3, %%ecx \n\t"␊
84 "rep; movsb \n\t"␊
85 :␊
86 : "c" (len), "D" (dst), "S" (src)␊
87 : "memory", "%edx" );␊
88}␊
89␊
90void bzero(void * dst, size_t len)␊
91{␊
92 asm volatile ( "xorl %%eax, %%eax \n\t"␊
93 "cld \n\t"␊
94 "movl %%ecx, %%edx \n\t"␊
95 "shrl $2, %%ecx \n\t"␊
96 "rep; stosl \n\t"␊
97 "movl %%edx, %%ecx \n\t"␊
98 "andl $3, %%ecx \n\t"␊
99 "rep; stosb \n\t"␊
100 : ␊
101 : "c" (len), "D" (dst)␊
102 : "memory", "%eax" );␊
103}␊
104#endif␊
105␊
106/* #if DONT_USE_GCC_BUILT_IN_STRLEN */␊
107␊
108#define tolower(c) ((int)((c) & ~0x20))␊
109#define toupper(c) ((int)((c) | 0x20))␊
110␊
111size_t strlen(const char * s)␊
112{␊
113␉int n = 0;␊
114␉while (*s++) n++;␊
115␉return(n);␊
116}␊
117␊
118/*#endif*/␊
119␊
120/* NOTE: Moved from ntfs.c */␊
121int␊
122memcmp(const void *p1, const void *p2, size_t len)␊
123{␊
124 while (len--) {␊
125 if (*(const char*)(p1++) != *(const char*)(p2++))␊
126 return -1;␊
127 }␊
128 return 0;␊
129}␊
130␊
131int␊
132strcmp(const char * s1, const char * s2)␊
133{␊
134␉while (*s1 && (*s1 == *s2)) {␊
135␉␉s1++;␊
136␉␉s2++;␊
137␉}␊
138␉return (*s1 - *s2);␊
139}␊
140␊
141int strncmp(const char * s1, const char * s2, size_t len)␊
142{␊
143␉register int n = len;␊
144␉while (--n >= 0 && *s1 == *s2++)␊
145␉␉if (*s1++ == '\0')␊
146␉␉␉return(0);␊
147␉return(n<0 ? 0 : *s1 - *--s2);␊
148}␊
149␊
150char *␊
151strcpy(char * s1, const char * s2)␊
152{␊
153␉register char *ret = s1;␊
154␉while ((*s1++ = *s2++))␊
155␉␉continue;␊
156␉return ret;␊
157}␊
158␊
159char *␊
160strncpy(char * s1, const char * s2, size_t n)␊
161{␊
162␉register char *ret = s1;␊
163␉while (n && (*s1++ = *s2++))␊
164␉␉n--;␊
165␉return ret;␊
166}␊
167␊
168char *␊
169strstr(const char *in, const char *str)␊
170{␊
171 char c;␊
172 size_t len;␊
173␊
174 c = *str++;␊
175 if (!c)␊
176 return (char *) in;␉// Trivial empty string case␊
177␊
178 len = strlen(str);␊
179 do {␊
180 char sc;␊
181␊
182 do {␊
183 sc = *in++;␊
184 if (!sc)␊
185 return (char *) 0;␊
186 } while (sc != c);␊
187 } while (strncmp(in, str, len) != 0);␊
188␊
189 return (char *) (in - 1);␊
190}␊
191␊
192int␊
193ptol(const char *str)␊
194{␊
195␉register int c = *str;␊
196␊
197␉if (c <= '7' && c >= '0')␊
198␉␉c -= '0';␊
199␉else if (c <= 'h' && c >= 'a')␊
200␉␉c -= 'a';␊
201␉else c = 0;␊
202␉return c;␊
203}␊
204␊
205int␊
206atoi(const char *str)␊
207{␊
208␉register int sum = 0;␊
209␉while (*str == ' ' || *str == '\t')␊
210␉␉str++;␊
211␉while (*str >= '0' && *str <= '9') {␊
212␉␉sum *= 10;␊
213␉␉sum += *str++ - '0';␊
214␉}␊
215␉return sum;␊
216}␊
217␊
218char *strncat(char *s1, const char *s2, size_t n)␊
219{␊
220␉register char *ret = s1;␊
221␉while (*s1)␊
222␉␉s1++;␊
223␉while (n-- && *s2)␊
224␉␉*s1++ = *s2++;␊
225␉*s1 = '\0';␊
226␉return ret;␊
227}␊
228␊
229char *strcat(char *s1, const char *s2)␊
230{␊
231␉return(strncat(s1, s2, strlen(s2)));␊
232}␊
233␊
234char *strdup(const char *s1)␊
235{␊
236␉return strcpy(malloc(strlen(s1) + 1), s1);␊
237}␊
238␊
239#if STRNCASECMP␊
240int strncasecmp(const char *s1, const char *s2, size_t len)␊
241{␊
242␉register int n = len;␊
243␉while (--n >= 0 && tolower(*s1) == tolower(*s2++))␊
244␉␉if (*s1++ == '\0')␊
245␉␉␉return(0);␊
246␉return(n<0 ? 0 : tolower(*s1) - tolower(*--s2));␊
247}␊
248#endif␊
249␊
250char* strchr(const char *str, int c)␊
251{␊
252 do␊
253 {␊
254 if(*str == c)␊
255 return (char*)str;␊
256 }␊
257 while(*(str++));␊
258 ␊
259 return 0;␊
260} ␊
261 ␊
262char* strbreak(const char *str, char **next, long *len)␊
263{␊
264 char *start = (char*)str, *end;␊
265 bool quoted = false;␊
266 ␊
267 if ( !start || !len )␊
268 return 0;␊
269 ␊
270 *len = 0;␊
271 ␊
272 while ( isspace(*start) )␊
273 start++;␊
274 ␊
275 if (*start == '"')␊
276 {␊
277 start++;␊
278 ␊
279 end = strchr(start, '"');␊
280 if(end)␊
281 quoted = true;␊
282 else␊
283 end = strchr(start, '\0');␊
284 }␊
285 else␊
286 {␊
287 for ( end = start; *end && !isspace(*end); end++ )␊
288 {}␊
289 }␊
290 ␊
291 *len = end - start;␊
292 ␊
293 if(next)␊
294 *next = quoted ? end+1 : end;␊
295 ␊
296 return start;␊
297}␊
298␊
299/* COPYRIGHT NOTICE: checksum8 from AppleSMBIOS */␊
300uint8_t checksum8( void * start, unsigned int length )␊
301{␊
302 uint8_t csum = 0;␊
303 uint8_t * cp = (uint8_t *) start;␊
304 unsigned int i;␊
305␊
306 for ( i = 0; i < length; i++)␊
307 csum += *cp++;␊
308␊
309 return csum;␊
310}␊
311␊
312

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