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 | ␉int n = 0;␊ |
135 | ␉while (*s++) n++;␊ |
136 | ␉return(n);␊ |
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 | int strncmp(const char * s1, const char * s2, size_t len)␊ |
163 | {␊ |
164 | ␉register int n = len;␊ |
165 | ␉while (--n >= 0 && *s1 == *s2++)␊ |
166 | ␉␉if (*s1++ == '\0')␊ |
167 | ␉␉␉return(0);␊ |
168 | ␉return(n<0 ? 0 : *s1 - *--s2);␊ |
169 | }␊ |
170 | ␊ |
171 | char *␊ |
172 | strcpy(char * s1, const char * s2)␊ |
173 | {␊ |
174 | ␉register char *ret = s1;␊ |
175 | ␉while ((*s1++ = *s2++))␊ |
176 | ␉␉continue;␊ |
177 | ␉return ret;␊ |
178 | }␊ |
179 | ␊ |
180 | char *␊ |
181 | strncpy(char * s1, const char * s2, size_t n)␊ |
182 | {␊ |
183 | ␉register char *ret = s1;␊ |
184 | ␉while (n && (*s1++ = *s2++))␊ |
185 | ␉␉n--;␊ |
186 | ␉return ret;␊ |
187 | }␊ |
188 | ␊ |
189 | char *␊ |
190 | strstr(const char *in, const char *str)␊ |
191 | {␊ |
192 | char c;␊ |
193 | size_t len;␊ |
194 | ␊ |
195 | c = *str++;␊ |
196 | if (!c)␊ |
197 | return (char *) in;␉// Trivial empty string case␊ |
198 | ␊ |
199 | len = strlen(str);␊ |
200 | do {␊ |
201 | char sc;␊ |
202 | ␊ |
203 | do {␊ |
204 | sc = *in++;␊ |
205 | if (!sc)␊ |
206 | return (char *) 0;␊ |
207 | } while (sc != c);␊ |
208 | } while (strncmp(in, str, len) != 0);␊ |
209 | ␊ |
210 | return (char *) (in - 1);␊ |
211 | }␊ |
212 | ␊ |
213 | int␊ |
214 | ptol(const char *str)␊ |
215 | {␊ |
216 | ␉register int c = *str;␊ |
217 | ␊ |
218 | ␉if (c <= '7' && c >= '0')␊ |
219 | ␉␉c -= '0';␊ |
220 | ␉else if (c <= 'h' && c >= 'a')␊ |
221 | ␉␉c -= 'a';␊ |
222 | ␉else c = 0;␊ |
223 | ␉return c;␊ |
224 | }␊ |
225 | ␊ |
226 | int␊ |
227 | atoi(const char *str)␊ |
228 | {␊ |
229 | ␉register int sum = 0;␊ |
230 | ␉while (*str == ' ' || *str == '\t')␊ |
231 | ␉␉str++;␊ |
232 | ␉while (*str >= '0' && *str <= '9') {␊ |
233 | ␉␉sum *= 10;␊ |
234 | ␉␉sum += *str++ - '0';␊ |
235 | ␉}␊ |
236 | ␉return sum;␊ |
237 | }␊ |
238 | ␊ |
239 | char *strncat(char *s1, const char *s2, size_t n)␊ |
240 | {␊ |
241 | ␉register char *ret = s1;␊ |
242 | ␉while (*s1)␊ |
243 | ␉␉s1++;␊ |
244 | ␉while (n-- && *s2)␊ |
245 | ␉␉*s1++ = *s2++;␊ |
246 | ␉*s1 = '\0';␊ |
247 | ␉return ret;␊ |
248 | }␊ |
249 | ␊ |
250 | char *strcat(char *s1, const char *s2)␊ |
251 | {␊ |
252 | ␉return(strncat(s1, s2, strlen(s2)));␊ |
253 | }␊ |
254 | ␊ |
255 | char *strdup(const char *s1)␊ |
256 | {␊ |
257 | ␉return strcpy(malloc(strlen(s1) + 1), s1);␊ |
258 | }␊ |
259 | ␊ |
260 | #if STRNCASECMP␊ |
261 | int strncasecmp(const char *s1, const char *s2, size_t len)␊ |
262 | {␊ |
263 | ␉register int n = len;␊ |
264 | ␉while (--n >= 0 && tolower(*s1) == tolower(*s2++))␊ |
265 | ␉␉if (*s1++ == '\0')␊ |
266 | ␉␉␉return(0);␊ |
267 | ␉return(n<0 ? 0 : tolower(*s1) - tolower(*--s2));␊ |
268 | }␊ |
269 | #endif␊ |
270 | ␊ |
271 | char* strchr(const char *str, int c)␊ |
272 | {␊ |
273 | do␊ |
274 | {␊ |
275 | if(*str == c)␊ |
276 | return (char*)str;␊ |
277 | }␊ |
278 | while(*(str++));␊ |
279 | ␊ |
280 | return 0;␊ |
281 | } ␊ |
282 | ␊ |
283 | char* strbreak(const char *str, char **next, long *len)␊ |
284 | {␊ |
285 | char *start = (char*)str, *end;␊ |
286 | bool quoted = false;␊ |
287 | ␊ |
288 | if ( !start || !len )␊ |
289 | return 0;␊ |
290 | ␊ |
291 | *len = 0;␊ |
292 | ␊ |
293 | while ( isspace(*start) )␊ |
294 | start++;␊ |
295 | ␊ |
296 | if (*start == '"')␊ |
297 | {␊ |
298 | start++;␊ |
299 | ␊ |
300 | end = strchr(start, '"');␊ |
301 | if(end)␊ |
302 | quoted = true;␊ |
303 | else␊ |
304 | end = strchr(start, '\0');␊ |
305 | }␊ |
306 | else␊ |
307 | {␊ |
308 | for ( end = start; *end && !isspace(*end); end++ )␊ |
309 | {}␊ |
310 | }␊ |
311 | ␊ |
312 | *len = end - start;␊ |
313 | ␊ |
314 | if(next)␊ |
315 | *next = quoted ? end+1 : end;␊ |
316 | ␊ |
317 | return start;␊ |
318 | }␊ |
319 | ␊ |
320 | /* COPYRIGHT NOTICE: checksum8 from AppleSMBIOS */␊ |
321 | uint8_t checksum8( void * start, unsigned int length )␊ |
322 | {␊ |
323 | uint8_t csum = 0;␊ |
324 | uint8_t * cp = (uint8_t *) start;␊ |
325 | unsigned int i;␊ |
326 | ␊ |
327 | for ( i = 0; i < length; i++)␊ |
328 | csum += *cp++;␊ |
329 | ␊ |
330 | return csum;␊ |
331 | }␊ |
332 | ␊ |
333 | |