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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␉const char* save = s;␊
114␉while (*s++);␊
115␉return (--s) - save;␊
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␊
141/* Derived from FreeBSD source */␊
142int strncmp(const char * s1, const char * s2, size_t n)␊
143{␊
144 if (!n)␊
145 return 0;␊
146 do {␊
147 if (*s1 != *s2++)␊
148 return (*(const unsigned char *)s1 -␊
149 *(const unsigned char *)(s2 - 1));␊
150 if (!*s1++)␊
151 break;␊
152 } while (--n);␊
153 return 0;␊
154}␊
155␊
156char *␊
157strcpy(char * s1, const char * s2)␊
158{␊
159␉register char *ret = s1;␊
160␉while ((*s1++ = *s2++))␊
161␉␉continue;␊
162␉return ret;␊
163}␊
164␊
165char *␊
166stpcpy(char * s1, const char * s2)␊
167{␊
168␉while ((*s1++ = *s2++)) {␊
169␉␉continue;␊
170␉}␊
171␉return --s1;␊
172}␊
173␊
174char *␊
175strncpy(char * s1, const char * s2, size_t n)␊
176{␊
177␉register char *ret = s1;␊
178␉while (n && (*s1++ = *s2++))␊
179 --n;␊
180␊
181␉if (n > 0) {␊
182␉␉bzero(s1, n);␊
183␉}␊
184␉return ret;␊
185}␊
186␊
187char *␊
188stpncpy(char * s1, const char * s2, size_t n)␊
189{␊
190␉while (n && (*s1++ = *s2++))␊
191 --n;␊
192␉if (n > 0)␊
193 bzero(s1, n);␊
194 return s1;␊
195}␊
196␊
197char *␊
198strstr(const char *in, const char *str)␊
199{␊
200 char c;␊
201 size_t len;␊
202␊
203 c = *str++;␊
204 if (!c)␊
205 return (char *) in;␉// Trivial empty string case␊
206␊
207 len = strlen(str);␊
208 do {␊
209 char sc;␊
210␊
211 do {␊
212 sc = *in++;␊
213 if (!sc)␊
214 return (char *) 0;␊
215 } while (sc != c);␊
216 } while (strncmp(in, str, len) != 0);␊
217␊
218 return (char *) (in - 1);␊
219}␊
220␊
221int␊
222ptol(const char *str)␊
223{␊
224␉register int c = *str;␊
225␊
226␉if (c <= '7' && c >= '0')␊
227␉␉c -= '0';␊
228␉else if (c <= 'h' && c >= 'a')␊
229␉␉c -= 'a';␊
230␉else c = 0;␊
231␉return c;␊
232}␊
233␊
234int␊
235atoi(const char *str)␊
236{␊
237␉register int sum = 0;␊
238␉while (*str == ' ' || *str == '\t')␊
239␉␉str++;␊
240␉while (*str >= '0' && *str <= '9') {␊
241␉␉sum *= 10;␊
242␉␉sum += *str++ - '0';␊
243␉}␊
244␉return sum;␊
245}␊
246␊
247char *strncat(char *s1, const char *s2, size_t n)␊
248{␊
249␉register char *ret = s1;␊
250␉while (*s1)␊
251␉␉s1++;␊
252␉while (n-- && (*s1++ = *s2++));␊
253␉return ret;␊
254}␊
255␊
256char *strcat(char *s1, const char *s2)␊
257{␊
258␉register char *ret = s1;␊
259␉while (*s1)␊
260␉␉s1++;␊
261␉while ((*s1++ = *s2++));␊
262␉return ret;␊
263}␊
264␊
265char *strdup(const char *s1)␊
266{␊
267␉return strcpy(malloc(strlen(s1) + 1), s1);␊
268}␊
269␊
270#if STRNCASECMP␊
271int strncasecmp(const char *s1, const char *s2, size_t len)␊
272{␊
273␉register int n = len;␊
274␉while (--n >= 0 && tolower(*s1) == tolower(*s2++))␊
275␉␉if (*s1++ == '\0')␊
276␉␉␉return(0);␊
277␉return(n<0 ? 0 : tolower(*s1) - tolower(*--s2));␊
278}␊
279#endif␊
280␊
281char* strchr(const char *str, int c)␊
282{␊
283 do␊
284 {␊
285 if(*str == c)␊
286 return (char*)str;␊
287 }␊
288 while(*(str++));␊
289 ␊
290 return 0;␊
291} ␊
292 ␊
293char* strbreak(const char *str, char **next, long *len)␊
294{␊
295 char *start = (char*)str, *end;␊
296 bool quoted = false;␊
297 ␊
298 if ( !start || !len )␊
299 return 0;␊
300 ␊
301 *len = 0;␊
302 ␊
303 while ( isspace(*start) )␊
304 start++;␊
305 ␊
306 if (*start == '"')␊
307 {␊
308 start++;␊
309␊
310 end = strchr(start, '"');␊
311 if(end)␊
312 quoted = true;␊
313 else␊
314 end = strchr(start, '\0');␊
315 }␊
316 else␊
317 {␊
318 for ( end = start; *end && !isspace(*end); end++ )␊
319 {}␊
320 }␊
321␊
322 *len = end - start;␊
323␊
324 if(next)␊
325 *next = quoted ? end+1 : end;␊
326␊
327 return start;␊
328}␊
329␊
330/* COPYRIGHT NOTICE: checksum8 from AppleSMBIOS */␊
331uint8_t checksum8( void * start, unsigned int length )␊
332{␊
333 uint8_t csum = 0;␊
334 uint8_t * cp = (uint8_t *) start;␊
335 unsigned int i;␊
336␊
337␉for ( i = 0; i < length; i++) {␊
338␉␉csum += *cp++;␊
339␉}␊
340␉return csum;␊
341}␊
342␊
343

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