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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2 | pj | 1 | /* Project: OSLib |
| 2 | * Description: The OS Construction Kit |
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| 3 | * Date: 1.6.2000 |
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| 4 | * Idea by: Luca Abeni & Gerardo Lamastra |
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| 5 | * |
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| 6 | * OSLib is an SO project aimed at developing a common, easy-to-use |
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| 7 | * low-level infrastructure for developing OS kernels and Embedded |
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| 8 | * Applications; it partially derives from the HARTIK project but it |
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| 9 | * currently is independently developed. |
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| 10 | * |
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| 11 | * OSLib is distributed under GPL License, and some of its code has |
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| 12 | * been derived from the Linux kernel source; also some important |
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| 13 | * ideas come from studying the DJGPP go32 extender. |
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| 14 | * |
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| 15 | * We acknowledge the Linux Community, Free Software Foundation, |
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| 16 | * D.J. Delorie and all the other developers who believe in the |
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| 17 | * freedom of software and ideas. |
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| 18 | * |
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| 19 | * For legalese, check out the included GPL license. |
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| 20 | */ |
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| 21 | |||
| 22 | #include <ll/i386/string.h> |
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| 23 | |||
| 24 | FILE(string); |
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| 25 | |||
| 26 | char *strcpy(char *dst,const char *src) |
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| 27 | { |
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| 28 | char *retval = dst; |
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| 29 | while (*src != 0) *dst++ = *src++; |
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| 30 | *dst = 0; |
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| 31 | return(retval); |
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| 32 | } |
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| 33 | |||
| 34 | char *strncpy(char *dst,const char *src,int n) |
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| 35 | { |
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| 36 | char *retval = dst; |
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| 37 | while (*src != 0 && n-- > 0) *dst++ = *src++; |
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| 38 | *dst = 0; |
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| 39 | return(retval); |
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| 40 | } |
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| 41 | |||
| 42 | int strcmp(const char *s1,const char *s2) |
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| 43 | { |
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| 44 | while (*s1 == *s2) { |
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| 45 | if (*s1 == 0) return 0; |
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| 46 | s1++; |
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| 47 | s2++; |
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| 48 | } |
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| 49 | return *(unsigned const char *)s1 - *(unsigned const char *)(s2); |
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| 50 | } |
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| 51 | |||
| 52 | int strncmp(const char *s1,const char *s2,int n) |
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| 53 | { |
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| 54 | if (n == 0) return 0; |
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| 55 | do { |
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| 56 | if (*s1 != *s2++) |
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| 57 | return *(unsigned const char *)s1 - *(unsigned const char *)--s2; |
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| 58 | if (*s1++ == 0) break; |
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| 59 | } while (--n != 0); |
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| 60 | return 0; |
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| 61 | } |
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| 62 | |||
| 63 | char *strupr(char *s) |
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| 64 | { |
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| 65 | char *base = s; |
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| 66 | while (*s != 0) { |
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| 67 | if (*s >= 'a' && *s <= 'z') |
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| 68 | *s = *s + 'A' -'a'; |
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| 69 | s++; |
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| 70 | } |
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| 71 | return(base); |
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| 72 | } |
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| 73 | |||
| 74 | char *strlwr(char *s) |
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| 75 | { |
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| 76 | char *base = s; |
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| 77 | while (*s != 0) { |
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| 78 | if (*s >= 'A' && *s <= 'Z') |
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| 79 | *s = *s + 'a' -'A'; |
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| 80 | s++; |
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| 81 | } |
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| 82 | return(base); |
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| 83 | } |
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| 84 | |||
| 85 | int strlen(const char *s) |
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| 86 | { |
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| 87 | register int result = 0; |
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| 88 | while (*s != 0) s++ , result++; |
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| 89 | return(result); |
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| 90 | } |
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| 91 | |||
| 92 | char *strcat(char *dst,char *src) |
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| 93 | { |
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| 94 | char *base = dst; |
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| 95 | while (*dst != 0) dst++; |
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| 96 | while (*src != 0) *dst++ = *src++; |
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| 97 | *dst = 0; |
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| 98 | return(base); |
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| 99 | } |
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| 100 | |||
| 101 | char *strscn(char *s,char *pattern) |
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| 102 | { |
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| 103 | char *scan; |
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| 104 | while (*s != 0) { |
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| 105 | scan = pattern; |
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| 106 | while (*scan != 0) { |
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| 107 | if (*s == *scan) return(s); |
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| 108 | else scan++; |
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| 109 | } |
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| 110 | s++; |
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| 111 | } |
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| 112 | return(NULL); |
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| 113 | } |
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| 114 | |||
| 115 | char *strchr(char *s,int c) |
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| 116 | { |
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| 117 | while (*s != 0) { |
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| 118 | if (*s == (char)(c)) return(s); |
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| 119 | else s++; |
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| 120 | } |
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| 121 | return(NULL); |
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| 122 | } |