source:
soft/giet_vm/giet_libs/string.c
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        | Last change on this file since 818 was 785, checked in by , 10 years ago | |
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| File size: 1.8 KB | |
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| [258] | 1 | ////////////////////////////////////////////////////////////////////////////////// | 
| 2 | // File : string.c | |
| 3 | // Date : 23/05/2013 | |
| 4 | // Author : Alexandre JOANNOU, Laurent LAMBERT | |
| 5 | // Copyright (c) UPMC-LIP6 | |
| 6 | /////////////////////////////////////////////////////////////////////////////////// | |
| 7 | ||
| [781] | 8 | /////////////////////////////////////////////////////// | 
| [777] | 9 | char * strcpy (char * destination, const char * source) | 
| [258] | 10 | { | 
| [781] | 11 | if (!destination || !source) return destination; | 
| [258] | 12 | |
| [781] | 13 | char* dst = destination; | 
| 14 | do | |
| 15 | { | |
| [785] | 16 | *dst = *source; | 
| [781] | 17 | dst++; | 
| [785] | 18 | source++; | 
| 19 | } while (*source); | |
| [258] | 20 | |
| [781] | 21 | *dst = 0; | 
| 22 | ||
| [258] | 23 | return destination; | 
| 24 | } | |
| 25 | ||
| [777] | 26 | |
| [781] | 27 | //////////////////////////////////////////////////// | 
| [777] | 28 | char * strncpy(char * dest, const char * src, int n) | 
| [258] | 29 | { | 
| [777] | 30 | int i; | 
| [781] | 31 | for (i = 0; i < n && src[i] != '\0'; i++) | 
| 32 | { | |
| [777] | 33 | dest[i] = src[i]; | 
| 34 | } | |
| [781] | 35 | for (; i < n ; i++) | 
| 36 | { | |
| [777] | 37 | dest[i] = '\0'; | 
| 38 | } | |
| [781] | 39 | |
| [777] | 40 | return dest; | 
| 41 | } | |
| 42 | ||
| 43 | ||
| [781] | 44 | ///////////////////////////////////////////////// | 
| [777] | 45 | int strcmp (const char * str1, const char * str2) | 
| 46 | { | |
| [781] | 47 | if (!str1 || !str2) | 
| 48 | { | |
| 49 | return -123456; // return a value out of the char's bounds | |
| [777] | 50 | } | 
| [258] | 51 | |
| [781] | 52 | while (*str1 && *str1 == *str2) | 
| 53 | { | |
| [258] | 54 | str1++; | 
| 55 | str2++; | |
| 56 | } | |
| 57 | ||
| 58 | return (*str1 - *str2); | |
| 59 | } | |
| 60 | ||
| [781] | 61 | ///////////////////////////// | 
| [777] | 62 | int strlen (const char * str) | 
| [607] | 63 | { | 
| [777] | 64 | const char * s = str; | 
| [607] | 65 | |
| [781] | 66 | while (*s) | 
| 67 | { | |
| [607] | 68 | s++; | 
| [777] | 69 | } | 
| [607] | 70 | return (s - str); | 
| 71 | } | |
| 72 | ||
| [777] | 73 | |
| [781] | 74 | ////////////////////////////////////// | 
| [777] | 75 | char * strchr(const char * str, int c) | 
| 76 | { | |
| 77 | const char * s = str; | |
| 78 | const char ch = c; | |
| [781] | 79 | while (*s != ch && *s != '\0') | 
| 80 | { | |
| [777] | 81 | s++; | 
| 82 | } | |
| 83 | ||
| 84 | return (char *) s; | |
| 85 | } | |
| 86 | ||
| 87 | ||
| [258] | 88 | // Local Variables: | 
| 89 | // tab-width: 4 | |
| 90 | // c-basic-offset: 4 | |
| 91 | // c-file-offsets:((innamespace . 0)(inline-open . 0)) | |
| 92 | // indent-tabs-mode: nil | |
| 93 | // End: | |
| 94 | // vim: filetype=c:expandtab:shiftwidth=4:tabstop=4:softtabstop=4 | 
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