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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␊
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␊
162int 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␊
171char *␊
172strcpy(char * s1, const char * s2)␊
173{␊
174␉register char *ret = s1;␊
175␉while ((*s1++ = *s2++))␊
176␉␉continue;␊
177␉return ret;␊
178}␊
179␊
180char *␊
181strncpy(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␊
189char *␊
190strstr(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␊
213int␊
214ptol(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␊
226int␊
227atoi(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␊
239char *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␊
250char *strcat(char *s1, const char *s2)␊
251{␊
252␉return(strncat(s1, s2, strlen(s2)));␊
253}␊
254␊
255char *strdup(const char *s1)␊
256{␊
257␉return strcpy(malloc(strlen(s1) + 1), s1);␊
258}␊
259␊
260#if STRNCASECMP␊
261int 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␊
271char* 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 ␊
283char* 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 */␊
321uint8_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

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