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Diffstat (limited to 'webrtc/base/stringutils.cc')
-rw-r--r-- | webrtc/base/stringutils.cc | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/webrtc/base/stringutils.cc b/webrtc/base/stringutils.cc new file mode 100644 index 0000000000..868e475f2d --- /dev/null +++ b/webrtc/base/stringutils.cc @@ -0,0 +1,133 @@ +/* + * Copyright 2004 The WebRTC Project Authors. All rights reserved. + * + * Use of this source code is governed by a BSD-style license + * that can be found in the LICENSE file in the root of the source + * tree. An additional intellectual property rights grant can be found + * in the file PATENTS. All contributing project authors may + * be found in the AUTHORS file in the root of the source tree. + */ + +#include "webrtc/base/checks.h" +#include "webrtc/base/stringutils.h" + +namespace rtc { + +bool memory_check(const void* memory, int c, size_t count) { + const char* char_memory = static_cast<const char*>(memory); + char char_c = static_cast<char>(c); + for (size_t i = 0; i < count; ++i) { + if (char_memory[i] != char_c) { + return false; + } + } + return true; +} + +bool string_match(const char* target, const char* pattern) { + while (*pattern) { + if (*pattern == '*') { + if (!*++pattern) { + return true; + } + while (*target) { + if ((toupper(*pattern) == toupper(*target)) + && string_match(target + 1, pattern + 1)) { + return true; + } + ++target; + } + return false; + } else { + if (toupper(*pattern) != toupper(*target)) { + return false; + } + ++target; + ++pattern; + } + } + return !*target; +} + +#if defined(WEBRTC_WIN) +int ascii_string_compare(const wchar_t* s1, const char* s2, size_t n, + CharacterTransformation transformation) { + wchar_t c1, c2; + while (true) { + if (n-- == 0) return 0; + c1 = transformation(*s1); + // Double check that characters are not UTF-8 + RTC_DCHECK_LT(static_cast<unsigned char>(*s2), 128); + // Note: *s2 gets implicitly promoted to wchar_t + c2 = transformation(*s2); + if (c1 != c2) return (c1 < c2) ? -1 : 1; + if (!c1) return 0; + ++s1; + ++s2; + } +} + +size_t asccpyn(wchar_t* buffer, size_t buflen, + const char* source, size_t srclen) { + if (buflen <= 0) + return 0; + + if (srclen == SIZE_UNKNOWN) { + srclen = strlenn(source, buflen - 1); + } else if (srclen >= buflen) { + srclen = buflen - 1; + } +#if _DEBUG + // Double check that characters are not UTF-8 + for (size_t pos = 0; pos < srclen; ++pos) + RTC_DCHECK_LT(static_cast<unsigned char>(source[pos]), 128); +#endif // _DEBUG + std::copy(source, source + srclen, buffer); + buffer[srclen] = 0; + return srclen; +} + +#endif // WEBRTC_WIN + +void replace_substrs(const char *search, + size_t search_len, + const char *replace, + size_t replace_len, + std::string *s) { + size_t pos = 0; + while ((pos = s->find(search, pos, search_len)) != std::string::npos) { + s->replace(pos, search_len, replace, replace_len); + pos += replace_len; + } +} + +bool starts_with(const char *s1, const char *s2) { + return strncmp(s1, s2, strlen(s2)) == 0; +} + +bool ends_with(const char *s1, const char *s2) { + size_t s1_length = strlen(s1); + size_t s2_length = strlen(s2); + + if (s2_length > s1_length) { + return false; + } + + const char* start = s1 + (s1_length - s2_length); + return strncmp(start, s2, s2_length) == 0; +} + +static const char kWhitespace[] = " \n\r\t"; + +std::string string_trim(const std::string& s) { + std::string::size_type first = s.find_first_not_of(kWhitespace); + std::string::size_type last = s.find_last_not_of(kWhitespace); + + if (first == std::string::npos || last == std::string::npos) { + return std::string(""); + } + + return s.substr(first, last - first + 1); +} + +} // namespace rtc |