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Merge pull request #775 from lioncash/str

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string_util: Minor changes
This commit is contained in:
bunnei 2018-07-23 09:34:41 -07:00 committed by GitHub
commit 7138b99f21
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 32 additions and 30 deletions
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60
src/common/string_util.cpp
View file

@ -162,21 +162,21 @@ void SplitString(const std::string& str, const char delim, std::vector<std::stri
std::istringstream iss(str);
output.resize(1);
while (std::getline(iss, *output.rbegin(), delim))
output.push_back("");
while (std::getline(iss, *output.rbegin(), delim)) {
output.emplace_back();
}
output.pop_back();
}
std::string TabsToSpaces(int tab_size, const std::string& in) {
const std::string spaces(tab_size, ' ');
std::string out(in);
std::string TabsToSpaces(int tab_size, std::string in) {
size_t i = 0;
while (out.npos != (i = out.find('\t')))
out.replace(i, 1, spaces);
return out;
while ((i = in.find('\t')) != std::string::npos) {
in.replace(i, 1, tab_size, ' ');
}
return in;
}
std::string ReplaceAll(std::string result, const std::string& src, const std::string& dest) {
@ -220,31 +220,37 @@ std::u16string UTF8ToUTF16(const std::string& input) {
}
static std::wstring CPToUTF16(u32 code_page, const std::string& input) {
auto const size =
const auto size =
MultiByteToWideChar(code_page, 0, input.data(), static_cast<int>(input.size()), nullptr, 0);
std::wstring output;
output.resize(size);
if (size == 0) {
return L"";
}
if (size == 0 ||
size != MultiByteToWideChar(code_page, 0, input.data(), static_cast<int>(input.size()),
&output[0], static_cast<int>(output.size())))
std::wstring output(size, L'\0');
if (size != MultiByteToWideChar(code_page, 0, input.data(), static_cast<int>(input.size()),
&output[0], static_cast<int>(output.size()))) {
output.clear();
}
return output;
}
std::string UTF16ToUTF8(const std::wstring& input) {
auto const size = WideCharToMultiByte(CP_UTF8, 0, input.data(), static_cast<int>(input.size()),
const auto size = WideCharToMultiByte(CP_UTF8, 0, input.data(), static_cast<int>(input.size()),
nullptr, 0, nullptr, nullptr);
if (size == 0) {
return "";
}
std::string output;
output.resize(size);
std::string output(size, '\0');
if (size == 0 ||
size != WideCharToMultiByte(CP_UTF8, 0, input.data(), static_cast<int>(input.size()),
&output[0], static_cast<int>(output.size()), nullptr, nullptr))
if (size != WideCharToMultiByte(CP_UTF8, 0, input.data(), static_cast<int>(input.size()),
&output[0], static_cast<int>(output.size()), nullptr,
nullptr)) {
output.clear();
}
return output;
}
@ -265,8 +271,6 @@ std::string CP1252ToUTF8(const std::string& input) {
template <typename T>
static std::string CodeToUTF8(const char* fromcode, const std::basic_string<T>& input) {
std::string result;
iconv_t const conv_desc = iconv_open("UTF-8", fromcode);
if ((iconv_t)(-1) == conv_desc) {
LOG_ERROR(Common, "Iconv initialization failure [{}]: {}", fromcode, strerror(errno));
@ -278,8 +282,7 @@ static std::string CodeToUTF8(const char* fromcode, const std::basic_string<T>&
// Multiply by 4, which is the max number of bytes to encode a codepoint
const size_t out_buffer_size = 4 * in_bytes;
std::string out_buffer;
out_buffer.resize(out_buffer_size);
std::string out_buffer(out_buffer_size, '\0');
auto src_buffer = &input[0];
size_t src_bytes = in_bytes;
@ -304,6 +307,7 @@ static std::string CodeToUTF8(const char* fromcode, const std::basic_string<T>&
}
}
std::string result;
out_buffer.resize(out_buffer_size - dst_bytes);
out_buffer.swap(result);
@ -313,8 +317,6 @@ static std::string CodeToUTF8(const char* fromcode, const std::basic_string<T>&
}
std::u16string UTF8ToUTF16(const std::string& input) {
std::u16string result;
iconv_t const conv_desc = iconv_open("UTF-16LE", "UTF-8");
if ((iconv_t)(-1) == conv_desc) {
LOG_ERROR(Common, "Iconv initialization failure [UTF-8]: {}", strerror(errno));
@ -326,8 +328,7 @@ std::u16string UTF8ToUTF16(const std::string& input) {
// Multiply by 4, which is the max number of bytes to encode a codepoint
const size_t out_buffer_size = 4 * sizeof(char16_t) * in_bytes;
std::u16string out_buffer;
out_buffer.resize(out_buffer_size);
std::u16string out_buffer(out_buffer_size, char16_t{});
char* src_buffer = const_cast<char*>(&input[0]);
size_t src_bytes = in_bytes;
@ -352,6 +353,7 @@ std::u16string UTF8ToUTF16(const std::string& input) {
}
}
std::u16string result;
out_buffer.resize(out_buffer_size - dst_bytes);
out_buffer.swap(result);

2
src/common/string_util.h
View file

@ -57,7 +57,7 @@ static bool TryParse(const std::string& str, N* const output) {
return false;
}
std::string TabsToSpaces(int tab_size, const std::string& in);
std::string TabsToSpaces(int tab_size, std::string in);
void SplitString(const std::string& str, char delim, std::vector<std::string>& output);