diff options
Diffstat (limited to 'src/3rdparty/angle/src/common/string_utils.cpp')
-rw-r--r-- | src/3rdparty/angle/src/common/string_utils.cpp | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/src/3rdparty/angle/src/common/string_utils.cpp b/src/3rdparty/angle/src/common/string_utils.cpp new file mode 100644 index 0000000000..acb0376bf9 --- /dev/null +++ b/src/3rdparty/angle/src/common/string_utils.cpp @@ -0,0 +1,136 @@ +// +// Copyright 2015 The ANGLE 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. +// +// string_utils: +// String helper functions. +// + +#include "string_utils.h" + +#include <fstream> +#include <sstream> + +namespace angle +{ + +const char kWhitespaceASCII[] = " \f\n\r\t\v"; + +std::vector<std::string> SplitString(const std::string &input, + const std::string &delimiters, + WhitespaceHandling whitespace, + SplitResult resultType) +{ + std::vector<std::string> result; + if (input.empty()) + { + return result; + } + + std::string::size_type start = 0; + while (start != std::string::npos) + { + auto end = input.find_first_of(delimiters, start); + + std::string piece; + if (end == std::string::npos) + { + piece = input.substr(start); + start = std::string::npos; + } + else + { + piece = input.substr(start, end - start); + start = end + 1; + } + + if (whitespace == TRIM_WHITESPACE) + { + piece = TrimString(piece, kWhitespaceASCII); + } + + if (resultType == SPLIT_WANT_ALL || !piece.empty()) + { + result.push_back(piece); + } + } + + return result; +} + +void SplitStringAlongWhitespace(const std::string &input, + std::vector<std::string> *tokensOut) +{ + + std::istringstream stream(input); + std::string line; + + while (std::getline(stream, line)) + { + size_t prev = 0, pos; + while ((pos = line.find_first_of(kWhitespaceASCII, prev)) != std::string::npos) + { + if (pos > prev) + tokensOut->push_back(line.substr(prev, pos - prev)); + prev = pos + 1; + } + if (prev < line.length()) + tokensOut->push_back(line.substr(prev, std::string::npos)); + } +} + +std::string TrimString(const std::string &input, const std::string &trimChars) +{ + auto begin = input.find_first_not_of(trimChars); + if (begin == std::string::npos) + { + return ""; + } + + std::string::size_type end = input.find_last_not_of(trimChars); + if (end == std::string::npos) + { + return input.substr(begin); + } + + return input.substr(begin, end - begin + 1); +} + +bool HexStringToUInt(const std::string &input, unsigned int *uintOut) +{ + unsigned int offset = 0; + + if (input.size() >= 2 && input[0] == '0' && input[1] == 'x') + { + offset = 2u; + } + + // Simple validity check + if (input.find_first_not_of("0123456789ABCDEFabcdef", offset) != std::string::npos) + { + return false; + } + + std::stringstream inStream(input); + inStream >> std::hex >> *uintOut; + return !inStream.fail(); +} + +bool ReadFileToString(const std::string &path, std::string *stringOut) +{ + std::ifstream inFile(path.c_str()); + if (inFile.fail()) + { + return false; + } + + inFile.seekg(0, std::ios::end); + stringOut->reserve(static_cast<std::string::size_type>(inFile.tellg())); + inFile.seekg(0, std::ios::beg); + + stringOut->assign(std::istreambuf_iterator<char>(inFile), std::istreambuf_iterator<char>()); + return !inFile.fail(); +} + +} |