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Root/tags/2.1/i386/libsa/string.c

Source at commit 2381 created 10 years 21 days ago.
By ifabio, Apply patch: (Credits to Thomas Jansen aka tja) - Reading options from all devices during boot. The options for the boot menu are only read from the devices rd(0,0) or bt(0,0). Consequently, boot menu options (e.g. "Quiet Boot", "Timeout", etc.) in plists on other devices (like most users have) are ignored. This patch extends the list of paths to search for the options plist on all devices that can be found.
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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