| /* |
| * Copyright 2017-2022 The OpenSSL Project Authors. All Rights Reserved. |
| * |
| * Licensed under the Apache License 2.0 (the "License"). You may not use |
| * this file except in compliance with the License. You can obtain a copy |
| * in the file LICENSE in the source distribution or at |
| * https://www.openssl.org/source/license.html |
| */ |
| |
| #include <string.h> |
| #include <stdio.h> |
| #include "crypto/ctype.h" |
| #include <openssl/ebcdic.h> |
| |
| #include "internal/e_os.h" |
| #include "internal/core.h" |
| |
| #ifndef OPENSSL_SYS_WINDOWS |
| #include <strings.h> |
| #endif |
| #include <locale.h> |
| |
| #ifdef OPENSSL_SYS_MACOSX |
| #include <xlocale.h> |
| #endif |
| |
| /* |
| * Define the character classes for each character in the seven bit ASCII |
| * character set. This is independent of the host's character set, characters |
| * are converted to ASCII before being used as an index in to this table. |
| * Characters outside of the seven bit ASCII range are detected before indexing. |
| */ |
| static const unsigned short ctype_char_map[128] = { |
| /* 00 nul */ CTYPE_MASK_cntrl, |
| /* 01 soh */ CTYPE_MASK_cntrl, |
| /* 02 stx */ CTYPE_MASK_cntrl, |
| /* 03 etx */ CTYPE_MASK_cntrl, |
| /* 04 eot */ CTYPE_MASK_cntrl, |
| /* 05 enq */ CTYPE_MASK_cntrl, |
| /* 06 ack */ CTYPE_MASK_cntrl, |
| /* 07 \a */ CTYPE_MASK_cntrl, |
| /* 08 \b */ CTYPE_MASK_cntrl, |
| /* 09 \t */ CTYPE_MASK_blank | CTYPE_MASK_cntrl | CTYPE_MASK_space, |
| /* 0A \n */ CTYPE_MASK_cntrl | CTYPE_MASK_space, |
| /* 0B \v */ CTYPE_MASK_cntrl | CTYPE_MASK_space, |
| /* 0C \f */ CTYPE_MASK_cntrl | CTYPE_MASK_space, |
| /* 0D \r */ CTYPE_MASK_cntrl | CTYPE_MASK_space, |
| /* 0E so */ CTYPE_MASK_cntrl, |
| /* 0F si */ CTYPE_MASK_cntrl, |
| /* 10 dle */ CTYPE_MASK_cntrl, |
| /* 11 dc1 */ CTYPE_MASK_cntrl, |
| /* 12 dc2 */ CTYPE_MASK_cntrl, |
| /* 13 dc3 */ CTYPE_MASK_cntrl, |
| /* 14 dc4 */ CTYPE_MASK_cntrl, |
| /* 15 nak */ CTYPE_MASK_cntrl, |
| /* 16 syn */ CTYPE_MASK_cntrl, |
| /* 17 etb */ CTYPE_MASK_cntrl, |
| /* 18 can */ CTYPE_MASK_cntrl, |
| /* 19 em */ CTYPE_MASK_cntrl, |
| /* 1A sub */ CTYPE_MASK_cntrl, |
| /* 1B esc */ CTYPE_MASK_cntrl, |
| /* 1C fs */ CTYPE_MASK_cntrl, |
| /* 1D gs */ CTYPE_MASK_cntrl, |
| /* 1E rs */ CTYPE_MASK_cntrl, |
| /* 1F us */ CTYPE_MASK_cntrl, |
| /* 20 */ CTYPE_MASK_blank | CTYPE_MASK_print | CTYPE_MASK_space |
| | CTYPE_MASK_asn1print, |
| /* 21 ! */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_punct, |
| /* 22 " */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_punct, |
| /* 23 # */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_punct, |
| /* 24 $ */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_punct, |
| /* 25 % */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_punct, |
| /* 26 & */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_punct, |
| /* 27 ' */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_punct |
| | CTYPE_MASK_asn1print, |
| /* 28 ( */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_punct |
| | CTYPE_MASK_asn1print, |
| /* 29 ) */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_punct |
| | CTYPE_MASK_asn1print, |
| /* 2A * */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_punct, |
| /* 2B + */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_punct |
| | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 2C , */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_punct |
| | CTYPE_MASK_asn1print, |
| /* 2D - */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_punct |
| | CTYPE_MASK_asn1print, |
| /* 2E . */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_punct |
| | CTYPE_MASK_asn1print, |
| /* 2F / */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_punct |
| | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 30 0 */ CTYPE_MASK_digit | CTYPE_MASK_graph | CTYPE_MASK_print |
| | CTYPE_MASK_xdigit | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 31 1 */ CTYPE_MASK_digit | CTYPE_MASK_graph | CTYPE_MASK_print |
| | CTYPE_MASK_xdigit | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 32 2 */ CTYPE_MASK_digit | CTYPE_MASK_graph | CTYPE_MASK_print |
| | CTYPE_MASK_xdigit | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 33 3 */ CTYPE_MASK_digit | CTYPE_MASK_graph | CTYPE_MASK_print |
| | CTYPE_MASK_xdigit | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 34 4 */ CTYPE_MASK_digit | CTYPE_MASK_graph | CTYPE_MASK_print |
| | CTYPE_MASK_xdigit | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 35 5 */ CTYPE_MASK_digit | CTYPE_MASK_graph | CTYPE_MASK_print |
| | CTYPE_MASK_xdigit | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 36 6 */ CTYPE_MASK_digit | CTYPE_MASK_graph | CTYPE_MASK_print |
| | CTYPE_MASK_xdigit | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 37 7 */ CTYPE_MASK_digit | CTYPE_MASK_graph | CTYPE_MASK_print |
| | CTYPE_MASK_xdigit | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 38 8 */ CTYPE_MASK_digit | CTYPE_MASK_graph | CTYPE_MASK_print |
| | CTYPE_MASK_xdigit | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 39 9 */ CTYPE_MASK_digit | CTYPE_MASK_graph | CTYPE_MASK_print |
| | CTYPE_MASK_xdigit | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 3A : */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_punct |
| | CTYPE_MASK_asn1print, |
| /* 3B ; */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_punct, |
| /* 3C < */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_punct, |
| /* 3D = */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_punct |
| | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 3E > */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_punct, |
| /* 3F ? */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_punct |
| | CTYPE_MASK_asn1print, |
| /* 40 @ */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_punct, |
| /* 41 A */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_upper |
| | CTYPE_MASK_xdigit | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 42 B */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_upper |
| | CTYPE_MASK_xdigit | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 43 C */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_upper |
| | CTYPE_MASK_xdigit | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 44 D */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_upper |
| | CTYPE_MASK_xdigit | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 45 E */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_upper |
| | CTYPE_MASK_xdigit | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 46 F */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_upper |
| | CTYPE_MASK_xdigit | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 47 G */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_upper |
| | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 48 H */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_upper |
| | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 49 I */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_upper |
| | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 4A J */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_upper |
| | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 4B K */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_upper |
| | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 4C L */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_upper |
| | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 4D M */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_upper |
| | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 4E N */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_upper |
| | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 4F O */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_upper |
| | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 50 P */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_upper |
| | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 51 Q */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_upper |
| | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 52 R */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_upper |
| | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 53 S */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_upper |
| | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 54 T */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_upper |
| | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 55 U */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_upper |
| | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 56 V */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_upper |
| | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 57 W */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_upper |
| | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 58 X */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_upper |
| | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 59 Y */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_upper |
| | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 5A Z */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_upper |
| | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 5B [ */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_punct, |
| /* 5C \ */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_punct, |
| /* 5D ] */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_punct, |
| /* 5E ^ */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_punct, |
| /* 5F _ */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_punct, |
| /* 60 ` */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_punct, |
| /* 61 a */ CTYPE_MASK_graph | CTYPE_MASK_lower | CTYPE_MASK_print |
| | CTYPE_MASK_xdigit | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 62 b */ CTYPE_MASK_graph | CTYPE_MASK_lower | CTYPE_MASK_print |
| | CTYPE_MASK_xdigit | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 63 c */ CTYPE_MASK_graph | CTYPE_MASK_lower | CTYPE_MASK_print |
| | CTYPE_MASK_xdigit | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 64 d */ CTYPE_MASK_graph | CTYPE_MASK_lower | CTYPE_MASK_print |
| | CTYPE_MASK_xdigit | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 65 e */ CTYPE_MASK_graph | CTYPE_MASK_lower | CTYPE_MASK_print |
| | CTYPE_MASK_xdigit | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 66 f */ CTYPE_MASK_graph | CTYPE_MASK_lower | CTYPE_MASK_print |
| | CTYPE_MASK_xdigit | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 67 g */ CTYPE_MASK_graph | CTYPE_MASK_lower | CTYPE_MASK_print |
| | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 68 h */ CTYPE_MASK_graph | CTYPE_MASK_lower | CTYPE_MASK_print |
| | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 69 i */ CTYPE_MASK_graph | CTYPE_MASK_lower | CTYPE_MASK_print |
| | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 6A j */ CTYPE_MASK_graph | CTYPE_MASK_lower | CTYPE_MASK_print |
| | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 6B k */ CTYPE_MASK_graph | CTYPE_MASK_lower | CTYPE_MASK_print |
| | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 6C l */ CTYPE_MASK_graph | CTYPE_MASK_lower | CTYPE_MASK_print |
| | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 6D m */ CTYPE_MASK_graph | CTYPE_MASK_lower | CTYPE_MASK_print |
| | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 6E n */ CTYPE_MASK_graph | CTYPE_MASK_lower | CTYPE_MASK_print |
| | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 6F o */ CTYPE_MASK_graph | CTYPE_MASK_lower | CTYPE_MASK_print |
| | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 70 p */ CTYPE_MASK_graph | CTYPE_MASK_lower | CTYPE_MASK_print |
| | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 71 q */ CTYPE_MASK_graph | CTYPE_MASK_lower | CTYPE_MASK_print |
| | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 72 r */ CTYPE_MASK_graph | CTYPE_MASK_lower | CTYPE_MASK_print |
| | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 73 s */ CTYPE_MASK_graph | CTYPE_MASK_lower | CTYPE_MASK_print |
| | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 74 t */ CTYPE_MASK_graph | CTYPE_MASK_lower | CTYPE_MASK_print |
| | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 75 u */ CTYPE_MASK_graph | CTYPE_MASK_lower | CTYPE_MASK_print |
| | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 76 v */ CTYPE_MASK_graph | CTYPE_MASK_lower | CTYPE_MASK_print |
| | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 77 w */ CTYPE_MASK_graph | CTYPE_MASK_lower | CTYPE_MASK_print |
| | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 78 x */ CTYPE_MASK_graph | CTYPE_MASK_lower | CTYPE_MASK_print |
| | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 79 y */ CTYPE_MASK_graph | CTYPE_MASK_lower | CTYPE_MASK_print |
| | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 7A z */ CTYPE_MASK_graph | CTYPE_MASK_lower | CTYPE_MASK_print |
| | CTYPE_MASK_base64 | CTYPE_MASK_asn1print, |
| /* 7B { */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_punct, |
| /* 7C | */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_punct, |
| /* 7D } */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_punct, |
| /* 7E ~ */ CTYPE_MASK_graph | CTYPE_MASK_print | CTYPE_MASK_punct, |
| /* 7F del */ CTYPE_MASK_cntrl |
| }; |
| |
| #ifdef CHARSET_EBCDIC |
| int ossl_toascii(int c) |
| { |
| if (c < -128 || c > 256 || c == EOF) |
| return c; |
| /* |
| * Adjust negatively signed characters. |
| * This is not required for ASCII because any character that sign extends |
| * is not seven bit and all of the checks are on the seven bit characters. |
| * I.e. any check must fail on sign extension. |
| */ |
| if (c < 0) |
| c += 256; |
| return os_toascii[c]; |
| } |
| |
| int ossl_fromascii(int c) |
| { |
| if (c < -128 || c > 256 || c == EOF) |
| return c; |
| if (c < 0) |
| c += 256; |
| return os_toebcdic[c]; |
| } |
| #endif |
| |
| int ossl_ctype_check(int c, unsigned int mask) |
| { |
| const int max = sizeof(ctype_char_map) / sizeof(*ctype_char_map); |
| const int a = ossl_toascii(c); |
| |
| return a >= 0 && a < max && (ctype_char_map[a] & mask) != 0; |
| } |
| |
| #if defined(CHARSET_EBCDIC) && !defined(CHARSET_EBCDIC_TEST) |
| static const int case_change = 0x40; |
| #else |
| static const int case_change = 0x20; |
| #endif |
| |
| int ossl_tolower(int c) |
| { |
| return ossl_isupper(c) ? c ^ case_change : c; |
| } |
| |
| int ossl_toupper(int c) |
| { |
| return ossl_islower(c) ? c ^ case_change : c; |
| } |
| |
| int ossl_ascii_isdigit(const char inchar) { |
| if (inchar > 0x2F && inchar < 0x3A) |
| return 1; |
| return 0; |
| } |
| |
| /* str[n]casecmp_l is defined in POSIX 2008-01. Value is taken accordingly |
| * https://www.gnu.org/software/libc/manual/html_node/Feature-Test-Macros.html */ |
| |
| #if (defined OPENSSL_SYS_WINDOWS) || (defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 200809L) |
| |
| # if defined OPENSSL_SYS_WINDOWS |
| # define locale_t _locale_t |
| # define freelocale _free_locale |
| # define strcasecmp_l _stricmp_l |
| # define strncasecmp_l _strnicmp_l |
| # endif |
| static locale_t loc; |
| |
| # ifndef FIPS_MODULE |
| void *ossl_c_locale() { |
| return (void *)loc; |
| } |
| # endif |
| |
| int ossl_init_casecmp_int() { |
| # ifdef OPENSSL_SYS_WINDOWS |
| loc = _create_locale(LC_COLLATE, "C"); |
| # else |
| loc = newlocale(LC_COLLATE_MASK, "C", (locale_t) 0); |
| # endif |
| return (loc == (locale_t) 0) ? 0 : 1; |
| } |
| |
| void ossl_deinit_casecmp() { |
| freelocale(loc); |
| } |
| |
| int OPENSSL_strcasecmp(const char *s1, const char *s2) |
| { |
| return strcasecmp_l(s1, s2, (locale_t)ossl_c_locale()); |
| } |
| |
| int OPENSSL_strncasecmp(const char *s1, const char *s2, size_t n) |
| { |
| return strncasecmp_l(s1, s2, n, (locale_t)ossl_c_locale()); |
| } |
| #else |
| # ifndef FIPS_MODULE |
| void *ossl_c_locale() { |
| return NULL; |
| } |
| # endif |
| |
| int ossl_init_casecmp_int() { |
| return 1; |
| } |
| |
| void ossl_deinit_casecmp() { |
| } |
| |
| int OPENSSL_strcasecmp(const char *s1, const char *s2) |
| { |
| return strcasecmp(s1, s2); |
| } |
| |
| int OPENSSL_strncasecmp(const char *s1, const char *s2, size_t n) |
| { |
| return strncasecmp(s1, s2, n); |
| } |
| #endif |
