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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␉␉{␊
149␉␉␉return (*(const unsigned char *)s1 - *(const unsigned char *)(s2 - 1));␊
150␉␉}␊
151␊
152␉␉if (!*s1++)␊
153␉␉{␊
154␉␉␉break;␊
155␉␉}␊
156␉} while (--n);␊
157␉return 0;␊
158}␊
159␊
160char *strcpy(char *s1, const char *s2)␊
161{␊
162␉register char *ret = s1;␊
163␉while ((*s1++ = *s2++))␊
164␉␉continue;␊
165␉return ret;␊
166}␊
167␊
168char *stpcpy(char *s1, const char *s2)␊
169{␊
170␉while ((*s1++ = *s2++))␊
171␉{␊
172␉␉continue;␊
173␉}␊
174␉return --s1;␊
175}␊
176␊
177char *strncpy(char *s1, const char *s2, size_t n)␊
178{␊
179␉register char *ret = s1;␊
180␉while (n && (*s1++ = *s2++))␊
181␉--n;␊
182␊
183␉if (n > 0) {␊
184␉␉bzero(s1, n);␊
185␉}␊
186␉return ret;␊
187}␊
188␊
189char *stpncpy(char *s1, const char *s2, size_t n)␊
190{␊
191␉while (n && (*s1++ = *s2++))␊
192␉␉--n;␊
193␉if (n > 0)␊
194␉{␊
195␉␉bzero(s1, n);␊
196␉}␊
197␉return s1;␊
198}␊
199␊
200char *strstr(const char *in, const char *str)␊
201{␊
202 char c;␊
203 size_t len;␊
204␊
205 c = *str++;␊
206 if (!c)␊
207 return (char *) in;␉// Trivial empty string case␊
208␊
209 len = strlen(str);␊
210 do {␊
211 char sc;␊
212␊
213 do {␊
214 sc = *in++;␊
215 if (!sc)␊
216 return (char *) 0;␊
217 } while (sc != c);␊
218 } while (strncmp(in, str, len) != 0);␊
219␊
220 return (char *) (in - 1);␊
221}␊
222␊
223int ptol(const char *str)␊
224{␊
225␉register int c = *str;␊
226␊
227␉if (c <= '7' && c >= '0')␊
228␉␉c -= '0';␊
229␉else if (c <= 'h' && c >= 'a')␊
230␉␉c -= 'a';␊
231␉else c = 0;␊
232␉return c;␊
233}␊
234␊
235int atoi(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␉{␊
261␉␉s1++;␊
262␉}␊
263␉while ((*s1++ = *s2++));␊
264␉return ret;␊
265}␊
266␊
267char *strdup(const char *s1)␊
268{␊
269␉return strcpy(malloc(strlen(s1) + 1), s1);␊
270}␊
271␊
272#if STRNCASECMP␊
273int strncasecmp(const char *s1, const char *s2, size_t len)␊
274{␊
275␉register int n = len;␊
276␉while (--n >= 0 && tolower(*s1) == tolower(*s2++))␊
277␉␉if (*s1++ == '\0')␊
278␉␉␉return(0);␊
279␉return(n<0 ? 0 : tolower(*s1) - tolower(*--s2));␊
280}␊
281#endif␊
282␊
283char *strchr(const char *str, int c)␊
284{␊
285 do␊
286 {␊
287 if(*str == c)␊
288 return (char*)str;␊
289 }␊
290 while(*(str++));␊
291 ␊
292 return 0;␊
293}␊
294␊
295char *strbreak(const char *str, char **next, long *len)␊
296{␊
297 char *start = (char*)str, *end;␊
298 bool quoted = false;␊
299 ␊
300 if ( !start || !len )␊
301 return 0;␊
302 ␊
303 *len = 0;␊
304 ␊
305 while ( isspace(*start) )␊
306 start++;␊
307 ␊
308 if (*start == '"')␊
309 {␊
310 start++;␊
311␊
312 end = strchr(start, '"');␊
313 if(end)␊
314 quoted = true;␊
315 else␊
316 end = strchr(start, '\0');␊
317 }␊
318 else␊
319 {␊
320 for ( end = start; *end && !isspace(*end); end++ )␊
321 {}␊
322 }␊
323␊
324 *len = end - start;␊
325␊
326 if(next)␊
327 *next = quoted ? end+1 : end;␊
328␊
329 return start;␊
330}␊
331␊
332/* COPYRIGHT NOTICE: checksum8 from AppleSMBIOS */␊
333uint8_t checksum8( void *start, unsigned int length )␊
334{␊
335 uint8_t csum = 0;␊
336 uint8_t * cp = (uint8_t *) start;␊
337 unsigned int i;␊
338␊
339␉for ( i = 0; i < length; i++)␊
340␉{␊
341␉␉csum += *cp++;␊
342␉}␊
343␉return csum;␊
344}␊
345␊
346

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