Diff markup
001 001
002 002
003 003
004 004
005 005
006 006
007 007
008 008
009 009
010 010
011 011
012 012
013 013
014 014
015 015
016 016
017 017
018 018
019 019
020 #include "string.h" 020 #include "string.h"
021 021
022 022
023 void *memcpy(void *dst0, const void *src0, reg 023 void *memcpy(void *dst0, const void *src0, register unsigned int size)
024 { 024 {
025 char *dst; 025 char *dst;
026 const char *src; 026 const char *src;
027 for (dst = (char*)dst0, src = (const char*)s 027 for (dst = (char*)dst0, src = (const char*)src0 ;
028 size > 0 ; 028 size > 0 ;
029 dst++, src++, size--) 029 dst++, src++, size--)
030 *dst = *src; 030 *dst = *src;
031 return dst0; 031 return dst0;
032 } 032 }
033 033
034 034
035 void *memset(void *dst0, register int c, regis 035 void *memset(void *dst0, register int c, register unsigned int length)
036 { 036 {
037 char *dst; 037 char *dst;
038 for (dst = (char*) dst0 ; 038 for (dst = (char*) dst0 ;
039 length > 0 ; 039 length > 0 ;
040 dst++, length --) 040 dst++, length --)
041 *dst = (char)c; 041 *dst = (char)c;
042 return dst0; 042 return dst0;
043 } 043 }
044 044
045 int memcmp(const void *s1, const void *s2, siz 045 int memcmp(const void *s1, const void *s2, size_t len)
046 { 046 {
047 const unsigned char *c1, *c2; 047 const unsigned char *c1, *c2;
048 unsigned int i; 048 unsigned int i;
049 049
050 for (i = 0, c1 = s1, c2 = s2; i < len; i++, 050 for (i = 0, c1 = s1, c2 = s2; i < len; i++, c1++, c2++)
051 { 051 {
052 if(*c1 != *c2) 052 if(*c1 != *c2)
053 return *c1 - *c2; 053 return *c1 - *c2;
054 } 054 }
055 055
056 return 0; 056 return 0;
057 } 057 }
058 058
059 059
060 unsigned int strlen(register const char *str) 060 unsigned int strlen(register const char *str)
061 { 061 {
062 unsigned int retval = 0; 062 unsigned int retval = 0;
063 063
064 while (*str++) 064 while (*str++)
065 retval++; 065 retval++;
066 066
067 return retval; 067 return retval;
068 } 068 }
069 069
070 070
071 unsigned int strnlen(const char * s, size_t co 071 unsigned int strnlen(const char * s, size_t count)
072 { 072 {
073 const char *sc; 073 const char *sc;
074 074
075 for (sc = s; count-- && *sc != '\0'; ++sc) 075 for (sc = s; count-- && *sc != '\0'; ++sc)
076 continue; 076 continue;
077 077
078 return sc - s; 078 return sc - s;
079 } 079 }
080 080
081 081
082 char *strzcpy(register char *dst, register con 082 char *strzcpy(register char *dst, register const char *src, register int len)
083 { 083 {
084 int i; 084 int i;
085 085
086 if (len <= 0) 086 if (len <= 0)
087 return dst; 087 return dst;
088 088
089 for (i = 0; i < len; i++) 089 for (i = 0; i < len; i++)
090 { 090 {
091 dst[i] = src[i]; 091 dst[i] = src[i];
092 if(src[i] == '\0') 092 if(src[i] == '\0')
093 return dst; 093 return dst;
094 } 094 }
095 095
096 dst[len-1] = '\0'; 096 dst[len-1] = '\0';
097 return dst; 097 return dst;
098 } 098 }
099 099
100 100
101 char *strzcat (char *dest, const char *src, si 101 char *strzcat (char *dest, const char *src, size_t n)
102 { 102 {
103 char *res = dest; 103 char *res = dest;
104 104
105 for ( ; *dest ; dest++); 105 for ( ; *dest ; dest++);
106 106
107 for ( ; *src ; src++, dest++) { 107 for ( ; *src ; src++, dest++) {
108 *dest = *src; 108 *dest = *src;
109 n--; 109 n--;
110 if (n <= 0) 110 if (n <= 0)
111 break; 111 break;
112 } 112 }
113 113
114 *dest = '\0'; 114 *dest = '\0';
115 return res; 115 return res;
116 } 116 }
117 117
118 int strcmp(register const char *s1, register c 118 int strcmp(register const char *s1, register const char *s2)
119 { 119 {
120 while (*s1 == *s2++) 120 while (*s1 == *s2++)
121 if (*s1++ == 0) 121 if (*s1++ == 0)
122 return (0); 122 return (0);
123 123
124 return (*(const unsigned char *)s1 - *(const 124 return (*(const unsigned char *)s1 - *(const unsigned char *)(s2 - 1));
125 } 125 }
126 126
127 127
128 int strncmp(register const char *s1, register 128 int strncmp(register const char *s1, register const char *s2, register int len)
129 { 129 {
130 char c1 = '\0', c2 = '\0'; 130 char c1 = '\0', c2 = '\0';
131 131
132 while (len > 0) 132 while (len > 0)
133 { 133 {
134 c1 = (unsigned char) *s1++; 134 c1 = (unsigned char) *s1++;
135 c2 = (unsigned char) *s2++; 135 c2 = (unsigned char) *s2++;
136 if (c1 == '\0' || c1 != c2) 136 if (c1 == '\0' || c1 != c2)
137 return c1 - c2; 137 return c1 - c2;
138 len--; 138 len--;
139 } 139 }
140 140
141 return c1 - c2; 141 return c1 - c2;
142 } 142 }