The Tor Browser / file comparison
comparison: nsprpub/lib/libc/src/strstr.c
nsprpub/lib/libc/src/strstr.c
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
equal
deleted
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| -1:000000000000 | 0:17b3a7f5d052 |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 #include "plstr.h" | |
| 7 #include <string.h> | |
| 8 | |
| 9 PR_IMPLEMENT(char *) | |
| 10 PL_strstr(const char *big, const char *little) | |
| 11 { | |
| 12 if( ((const char *)0 == big) || ((const char *)0 == little) ) return (char *)0; | |
| 13 if( ((char)0 == *big) || ((char)0 == *little) ) return (char *)0; | |
| 14 | |
| 15 return strstr(big, little); | |
| 16 } | |
| 17 | |
| 18 PR_IMPLEMENT(char *) | |
| 19 PL_strrstr(const char *big, const char *little) | |
| 20 { | |
| 21 const char *p; | |
| 22 size_t ll; | |
| 23 size_t bl; | |
| 24 | |
| 25 if( ((const char *)0 == big) || ((const char *)0 == little) ) return (char *)0; | |
| 26 if( ((char)0 == *big) || ((char)0 == *little) ) return (char *)0; | |
| 27 | |
| 28 ll = strlen(little); | |
| 29 bl = strlen(big); | |
| 30 if( bl < ll ) return (char *)0; | |
| 31 p = &big[ bl - ll ]; | |
| 32 | |
| 33 for( ; p >= big; p-- ) | |
| 34 if( *little == *p ) | |
| 35 if( 0 == strncmp(p, little, ll) ) | |
| 36 return (char *)p; | |
| 37 | |
| 38 return (char *)0; | |
| 39 } | |
| 40 | |
| 41 PR_IMPLEMENT(char *) | |
| 42 PL_strnstr(const char *big, const char *little, PRUint32 max) | |
| 43 { | |
| 44 size_t ll; | |
| 45 | |
| 46 if( ((const char *)0 == big) || ((const char *)0 == little) ) return (char *)0; | |
| 47 if( ((char)0 == *big) || ((char)0 == *little) ) return (char *)0; | |
| 48 | |
| 49 ll = strlen(little); | |
| 50 if( ll > (size_t)max ) return (char *)0; | |
| 51 max -= (PRUint32)ll; | |
| 52 max++; | |
| 53 | |
| 54 for( ; max && *big; big++, max-- ) | |
| 55 if( *little == *big ) | |
| 56 if( 0 == strncmp(big, little, ll) ) | |
| 57 return (char *)big; | |
| 58 | |
| 59 return (char *)0; | |
| 60 } | |
| 61 | |
| 62 PR_IMPLEMENT(char *) | |
| 63 PL_strnrstr(const char *big, const char *little, PRUint32 max) | |
| 64 { | |
| 65 const char *p; | |
| 66 size_t ll; | |
| 67 | |
| 68 if( ((const char *)0 == big) || ((const char *)0 == little) ) return (char *)0; | |
| 69 if( ((char)0 == *big) || ((char)0 == *little) ) return (char *)0; | |
| 70 | |
| 71 ll = strlen(little); | |
| 72 | |
| 73 for( p = big; max && *p; p++, max-- ) | |
| 74 ; | |
| 75 | |
| 76 p -= ll; | |
| 77 if( p < big ) return (char *)0; | |
| 78 | |
| 79 for( ; p >= big; p-- ) | |
| 80 if( *little == *p ) | |
| 81 if( 0 == strncmp(p, little, ll) ) | |
| 82 return (char *)p; | |
| 83 | |
| 84 return (char *)0; | |
| 85 } |
