diff options
Diffstat (limited to 'nsprpub/lib/libc/src/strcase.c')
| -rw-r--r-- | nsprpub/lib/libc/src/strcase.c | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/nsprpub/lib/libc/src/strcase.c b/nsprpub/lib/libc/src/strcase.c new file mode 100644 index 0000000000..f1ab038cd9 --- /dev/null +++ b/nsprpub/lib/libc/src/strcase.c @@ -0,0 +1,206 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "plstr.h" +#include <string.h> + +static const unsigned char uc[] = +{ + '\000', '\001', '\002', '\003', '\004', '\005', '\006', '\007', + '\010', '\011', '\012', '\013', '\014', '\015', '\016', '\017', + '\020', '\021', '\022', '\023', '\024', '\025', '\026', '\027', + '\030', '\031', '\032', '\033', '\034', '\035', '\036', '\037', + ' ', '!', '"', '#', '$', '%', '&', '\'', + '(', ')', '*', '+', ',', '-', '.', '/', + '0', '1', '2', '3', '4', '5', '6', '7', + '8', '9', ':', ';', '<', '=', '>', '?', + '@', 'A', 'B', 'C', 'D', 'E', 'F', 'G', + 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', + 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', + 'X', 'Y', 'Z', '[', '\\', ']', '^', '_', + '`', 'A', 'B', 'C', 'D', 'E', 'F', 'G', + 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', + 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', + 'X', 'Y', 'Z', '{', '|', '}', '~', '\177', + 0200, 0201, 0202, 0203, 0204, 0205, 0206, 0207, + 0210, 0211, 0212, 0213, 0214, 0215, 0216, 0217, + 0220, 0221, 0222, 0223, 0224, 0225, 0226, 0227, + 0230, 0231, 0232, 0233, 0234, 0235, 0236, 0237, + 0240, 0241, 0242, 0243, 0244, 0245, 0246, 0247, + 0250, 0251, 0252, 0253, 0254, 0255, 0256, 0257, + 0260, 0261, 0262, 0263, 0264, 0265, 0266, 0267, + 0270, 0271, 0272, 0273, 0274, 0275, 0276, 0277, + 0300, 0301, 0302, 0303, 0304, 0305, 0306, 0307, + 0310, 0311, 0312, 0313, 0314, 0315, 0316, 0317, + 0320, 0321, 0322, 0323, 0324, 0325, 0326, 0327, + 0330, 0331, 0332, 0333, 0334, 0335, 0336, 0337, + 0340, 0341, 0342, 0343, 0344, 0345, 0346, 0347, + 0350, 0351, 0352, 0353, 0354, 0355, 0356, 0357, + 0360, 0361, 0362, 0363, 0364, 0365, 0366, 0367, + 0370, 0371, 0372, 0373, 0374, 0375, 0376, 0377 +}; + +PR_IMPLEMENT(PRIntn) +PL_strcasecmp(const char *a, const char *b) +{ + const unsigned char *ua = (const unsigned char *)a; + const unsigned char *ub = (const unsigned char *)b; + + if( (const char *)0 == a ) { + return ((const char *)0 == b) ? 0 : -1; + } + if( (const char *)0 == b ) { + return 1; + } + + while( (uc[*ua] == uc[*ub]) && ('\0' != *a) ) + { + a++; + ua++; + ub++; + } + + return (PRIntn)(uc[*ua] - uc[*ub]); +} + +PR_IMPLEMENT(PRIntn) +PL_strncasecmp(const char *a, const char *b, PRUint32 max) +{ + const unsigned char *ua = (const unsigned char *)a; + const unsigned char *ub = (const unsigned char *)b; + + if( (const char *)0 == a ) { + return ((const char *)0 == b) ? 0 : -1; + } + if( (const char *)0 == b ) { + return 1; + } + + while( max && (uc[*ua] == uc[*ub]) && ('\0' != *a) ) + { + a++; + ua++; + ub++; + max--; + } + + if( 0 == max ) { + return (PRIntn)0; + } + + return (PRIntn)(uc[*ua] - uc[*ub]); +} + +PR_IMPLEMENT(char *) +PL_strcasestr(const char *big, const char *little) +{ + PRUint32 ll; + + if( ((const char *)0 == big) || ((const char *)0 == little) ) { + return (char *)0; + } + if( ((char)0 == *big) || ((char)0 == *little) ) { + return (char *)0; + } + + ll = strlen(little); + + for( ; *big; big++ ) + /* obvious improvement available here */ + if( 0 == PL_strncasecmp(big, little, ll) ) { + return (char *)big; + } + + return (char *)0; +} + +PR_IMPLEMENT(char *) +PL_strcaserstr(const char *big, const char *little) +{ + const char *p; + PRUint32 bl, ll; + + if( ((const char *)0 == big) || ((const char *)0 == little) ) { + return (char *)0; + } + if( ((char)0 == *big) || ((char)0 == *little) ) { + return (char *)0; + } + + bl = strlen(big); + ll = strlen(little); + if( bl < ll ) { + return (char *)0; + } + p = &big[ bl - ll ]; + + for( ; p >= big; p-- ) + /* obvious improvement available here */ + if( 0 == PL_strncasecmp(p, little, ll) ) { + return (char *)p; + } + + return (char *)0; +} + +PR_IMPLEMENT(char *) +PL_strncasestr(const char *big, const char *little, PRUint32 max) +{ + PRUint32 ll; + + if( ((const char *)0 == big) || ((const char *)0 == little) ) { + return (char *)0; + } + if( ((char)0 == *big) || ((char)0 == *little) ) { + return (char *)0; + } + + ll = strlen(little); + if( ll > max ) { + return (char *)0; + } + max -= ll; + max++; + + for( ; max && *big; big++, max-- ) + /* obvious improvement available here */ + if( 0 == PL_strncasecmp(big, little, ll) ) { + return (char *)big; + } + + return (char *)0; +} + +PR_IMPLEMENT(char *) +PL_strncaserstr(const char *big, const char *little, PRUint32 max) +{ + const char *p; + PRUint32 ll; + + if( ((const char *)0 == big) || ((const char *)0 == little) ) { + return (char *)0; + } + if( ((char)0 == *big) || ((char)0 == *little) ) { + return (char *)0; + } + + ll = strlen(little); + + for( p = big; max && *p; p++, max-- ) + ; + + p -= ll; + if( p < big ) { + return (char *)0; + } + + for( ; p >= big; p-- ) + /* obvious improvement available here */ + if( 0 == PL_strncasecmp(p, little, ll) ) { + return (char *)p; + } + + return (char *)0; +} |