107 lines
3.1 KiB
C
107 lines
3.1 KiB
C
/*
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* Copyright (c) 2000-2001 Proofpoint, Inc. and its suppliers.
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* All rights reserved.
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* Copyright (c) 1983, 1995-1997 Eric P. Allman. All rights reserved.
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* Copyright (c) 1987, 1988, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* By using this file, you agree to the terms and conditions set
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* forth in the LICENSE file which can be found at the top level of
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* the sendmail distribution.
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*
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*/
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#include <sm/gen.h>
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SM_RCSID("@(#)$Id: strcasecmp.c,v 1.16 2013/11/22 20:51:43 ca Exp $")
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#include <sm/config.h>
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#include <sm/string.h>
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#include <string.h>
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/*
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** SM_STRCASECMP -- 8-bit clean version of strcasecmp
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**
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** Thank you, vendors, for making this all necessary.
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*/
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/*
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** This array is designed for mapping upper and lower case letter
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** together for a case independent comparison. The mappings are
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** based upon ascii character sequences.
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*/
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const unsigned char charmap[] =
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{
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0000, 0001, 0002, 0003, 0004, 0005, 0006, 0007,
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0010, 0011, 0012, 0013, 0014, 0015, 0016, 0017,
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0020, 0021, 0022, 0023, 0024, 0025, 0026, 0027,
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0030, 0031, 0032, 0033, 0034, 0035, 0036, 0037,
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0040, 0041, 0042, 0043, 0044, 0045, 0046, 0047,
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0050, 0051, 0052, 0053, 0054, 0055, 0056, 0057,
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0060, 0061, 0062, 0063, 0064, 0065, 0066, 0067,
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0070, 0071, 0072, 0073, 0074, 0075, 0076, 0077,
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0100, 0141, 0142, 0143, 0144, 0145, 0146, 0147,
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0150, 0151, 0152, 0153, 0154, 0155, 0156, 0157,
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0160, 0161, 0162, 0163, 0164, 0165, 0166, 0167,
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0170, 0171, 0172, 0133, 0134, 0135, 0136, 0137,
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0140, 0141, 0142, 0143, 0144, 0145, 0146, 0147,
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0150, 0151, 0152, 0153, 0154, 0155, 0156, 0157,
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0160, 0161, 0162, 0163, 0164, 0165, 0166, 0167,
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0170, 0171, 0172, 0173, 0174, 0175, 0176, 0177,
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0200, 0201, 0202, 0203, 0204, 0205, 0206, 0207,
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0210, 0211, 0212, 0213, 0214, 0215, 0216, 0217,
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0220, 0221, 0222, 0223, 0224, 0225, 0226, 0227,
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0230, 0231, 0232, 0233, 0234, 0235, 0236, 0237,
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0240, 0241, 0242, 0243, 0244, 0245, 0246, 0247,
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0250, 0251, 0252, 0253, 0254, 0255, 0256, 0257,
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0260, 0261, 0262, 0263, 0264, 0265, 0266, 0267,
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0270, 0271, 0272, 0273, 0274, 0275, 0276, 0277,
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0300, 0301, 0302, 0303, 0304, 0305, 0306, 0307,
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0310, 0311, 0312, 0313, 0314, 0315, 0316, 0317,
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0320, 0321, 0322, 0323, 0324, 0325, 0326, 0327,
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0330, 0331, 0332, 0333, 0334, 0335, 0336, 0337,
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0340, 0341, 0342, 0343, 0344, 0345, 0346, 0347,
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0350, 0351, 0352, 0353, 0354, 0355, 0356, 0357,
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0360, 0361, 0362, 0363, 0364, 0365, 0366, 0367,
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0370, 0371, 0372, 0373, 0374, 0375, 0376, 0377,
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};
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int
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sm_strcasecmp(s1, s2)
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const char *s1, *s2;
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{
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const unsigned char *us1 = (const unsigned char *)s1;
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const unsigned char *us2 = (const unsigned char *)s2;
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while (charmap[*us1] == charmap[*us2])
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{
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if (*us1 == '\0')
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return 0;
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++us1;
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++us2;
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}
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return charmap[*us1] - charmap[*us2];
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}
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int
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sm_strncasecmp(s1, s2, n)
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const char *s1, *s2;
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register size_t n;
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{
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if (n != 0)
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{
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register const unsigned char *cm = charmap;
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register const unsigned char *us1 = (const unsigned char *)s1;
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register const unsigned char *us2 = (const unsigned char *)s2;
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do
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{
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if (cm[*us1] != cm[*us2++])
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return (cm[*us1] - cm[*--us2]);
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if (*us1++ == '\0')
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break;
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} while (--n != 0);
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}
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return 0;
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}
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