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Diffstat (limited to 'src/3rdparty/pcre2/src/pcre2_string_utils.c')
| -rw-r--r-- | src/3rdparty/pcre2/src/pcre2_string_utils.c | 201 |
1 files changed, 201 insertions, 0 deletions
diff --git a/src/3rdparty/pcre2/src/pcre2_string_utils.c b/src/3rdparty/pcre2/src/pcre2_string_utils.c new file mode 100644 index 0000000000..2a1f282629 --- /dev/null +++ b/src/3rdparty/pcre2/src/pcre2_string_utils.c @@ -0,0 +1,201 @@ +/************************************************* +* Perl-Compatible Regular Expressions * +*************************************************/ + +/* PCRE is a library of functions to support regular expressions whose syntax +and semantics are as close as possible to those of the Perl 5 language. + + Written by Philip Hazel + Original API code Copyright (c) 1997-2012 University of Cambridge + New API code Copyright (c) 2016 University of Cambridge + +----------------------------------------------------------------------------- +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are met: + + * Redistributions of source code must retain the above copyright notice, + this list of conditions and the following disclaimer. + + * Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in the + documentation and/or other materials provided with the distribution. + + * Neither the name of the University of Cambridge nor the names of its + contributors may be used to endorse or promote products derived from + this software without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" +AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE +LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR +CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF +SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS +INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN +CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) +ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE +POSSIBILITY OF SUCH DAMAGE. +----------------------------------------------------------------------------- +*/ + +/* This module contains internal functions for comparing and finding the length +of strings. These are used instead of strcmp() etc because the standard +functions work only on 8-bit data. */ + + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include "pcre2_internal.h" + + +/************************************************* +* Compare two zero-terminated PCRE2 strings * +*************************************************/ + +/* +Arguments: + str1 first string + str2 second string + +Returns: 0, 1, or -1 +*/ + +int +PRIV(strcmp)(PCRE2_SPTR str1, PCRE2_SPTR str2) +{ +PCRE2_UCHAR c1, c2; +while (*str1 != '\0' || *str2 != '\0') + { + c1 = *str1++; + c2 = *str2++; + if (c1 != c2) return ((c1 > c2) << 1) - 1; + } +return 0; +} + + +/************************************************* +* Compare zero-terminated PCRE2 & 8-bit strings * +*************************************************/ + +/* As the 8-bit string is almost always a literal, its type is specified as +const char *. + +Arguments: + str1 first string + str2 second string + +Returns: 0, 1, or -1 +*/ + +int +PRIV(strcmp_c8)(PCRE2_SPTR str1, const char *str2) +{ +PCRE2_UCHAR c1, c2; +while (*str1 != '\0' || *str2 != '\0') + { + c1 = *str1++; + c2 = *str2++; + if (c1 != c2) return ((c1 > c2) << 1) - 1; + } +return 0; +} + + +/************************************************* +* Compare two PCRE2 strings, given a length * +*************************************************/ + +/* +Arguments: + str1 first string + str2 second string + len the length + +Returns: 0, 1, or -1 +*/ + +int +PRIV(strncmp)(PCRE2_SPTR str1, PCRE2_SPTR str2, size_t len) +{ +PCRE2_UCHAR c1, c2; +for (; len > 0; len--) + { + c1 = *str1++; + c2 = *str2++; + if (c1 != c2) return ((c1 > c2) << 1) - 1; + } +return 0; +} + + +/************************************************* +* Compare PCRE2 string to 8-bit string by length * +*************************************************/ + +/* As the 8-bit string is almost always a literal, its type is specified as +const char *. + +Arguments: + str1 first string + str2 second string + len the length + +Returns: 0, 1, or -1 +*/ + +int +PRIV(strncmp_c8)(PCRE2_SPTR str1, const char *str2, size_t len) +{ +PCRE2_UCHAR c1, c2; +for (; len > 0; len--) + { + c1 = *str1++; + c2 = *str2++; + if (c1 != c2) return ((c1 > c2) << 1) - 1; + } +return 0; +} + + +/************************************************* +* Find the length of a PCRE2 string * +*************************************************/ + +/* +Argument: the string +Returns: the length +*/ + +PCRE2_SIZE +PRIV(strlen)(PCRE2_SPTR str) +{ +PCRE2_SIZE c = 0; +while (*str++ != 0) c++; +return c; +} + + +/************************************************* +* Copy 8-bit 0-terminated string to PCRE2 string * +*************************************************/ + +/* Arguments: + str1 buffer to receive the string + str2 8-bit string to be copied + +Returns: the number of code units used (excluding trailing zero) +*/ + +PCRE2_SIZE +PRIV(strcpy_c8)(PCRE2_UCHAR *str1, const char *str2) +{ +PCRE2_UCHAR *t = str1; +while (*str2 != 0) *t++ = *str2++; +*t = 0; +return t - str1; +} + +/* End of pcre2_string_utils.c */ |