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Diffstat (limited to 'src/sksl/SkSLString.cpp')
-rw-r--r-- | src/sksl/SkSLString.cpp | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/src/sksl/SkSLString.cpp b/src/sksl/SkSLString.cpp new file mode 100644 index 0000000000..e98062efd0 --- /dev/null +++ b/src/sksl/SkSLString.cpp @@ -0,0 +1,173 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "SkSLString.h" + +#include "SkSLUtil.h" +#include <cinttypes> +#include <errno.h> +#include <limits.h> +#include <locale> +#include <sstream> +#include <string> + +namespace SkSL { + +String String::printf(const char* fmt, ...) { + va_list args; + va_start(args, fmt); + String result; + result.vappendf(fmt, args); + return result; +} + +#ifdef SKSL_STANDALONE +void String::appendf(const char* fmt, ...) { + va_list args; + va_start(args, fmt); + this->vappendf(fmt, args); +} +#endif + +void String::vappendf(const char* fmt, va_list args) { +#ifdef SKSL_BUILD_FOR_WIN + #define VSNPRINTF _vsnprintf +#else + #define VSNPRINTF vsnprintf +#endif + #define BUFFER_SIZE 256 + char buffer[BUFFER_SIZE]; + size_t size = VSNPRINTF(buffer, BUFFER_SIZE, fmt, args); + if (BUFFER_SIZE >= size) { + this->append(buffer, size); + } else { + auto newBuffer = std::unique_ptr<char[]>(new char[size]); + VSNPRINTF(newBuffer.get(), size, fmt, args); + this->append(newBuffer.get(), size); + } + va_end(args); +} + + +bool String::startsWith(const char* s) const { + return strncmp(c_str(), s, strlen(s)); +} + +bool String::endsWith(const char* s) const { + size_t len = strlen(s); + if (size() < len) { + return false; + } + return strncmp(c_str() + size() - len, s, len); +} + +String String::operator+(const char* s) const { + String result(*this); + result.append(s); + return result; +} + +String String::operator+(const String& s) const { + String result(*this); + result.append(s); + return result; +} + +bool String::operator==(const String& s) const { + return this->size() == s.size() && !memcmp(c_str(), s.c_str(), this->size()); +} + +bool String::operator!=(const String& s) const { + return !(*this == s); +} + +bool String::operator==(const char* s) const { + return this->size() == strlen(s) && !memcmp(c_str(), s, this->size()); +} + +bool String::operator!=(const char* s) const { + return !(*this == s); +} + +String operator+(const char* s1, const String& s2) { + String result(s1); + result.append(s2); + return result; +} + +bool operator==(const char* s1, const String& s2) { + return s2 == s1; +} + +bool operator!=(const char* s1, const String& s2) { + return s2 != s1; +} + +String to_string(int32_t value) { + return SkSL::String::printf("%d", value); +} + +String to_string(uint32_t value) { + return SkSL::String::printf("%u", value); +} + +String to_string(int64_t value) { + return SkSL::String::printf("%" PRId64, value); +} + +String to_string(uint64_t value) { + return SkSL::String::printf("%" PRIu64, value); +} + +String to_string(double value) { +#ifdef SKSL_BUILD_FOR_WIN + #define SNPRINTF _snprintf +#else + #define SNPRINTF snprintf +#endif +#define MAX_DOUBLE_CHARS 25 + char buffer[MAX_DOUBLE_CHARS]; + SKSL_DEBUGCODE(int len = )SNPRINTF(buffer, sizeof(buffer), "%.17g", value); + ASSERT(len < MAX_DOUBLE_CHARS); + String result(buffer); + if (!strchr(buffer, '.') && !strchr(buffer, 'e')) { + result += ".0"; + } + return result; +#undef SNPRINTF +#undef MAX_DOUBLE_CHARS +} + +int stoi(String s) { + char* p; + SKSL_DEBUGCODE(errno = 0;) + long result = strtol(s.c_str(), &p, 0); + ASSERT(*p == 0); + ASSERT(!errno && INT_MAX >= result && INT_MIN <= result); + return (int) result; +} + +double stod(String s) { + double result; + std::string str(s.c_str(), s.size()); + std::stringstream buffer(str); + buffer.imbue(std::locale::classic()); + buffer >> result; + ASSERT(!buffer.fail()); + return result; +} + +long stol(String s) { + char* p; + SKSL_DEBUGCODE(errno = 0;) + long result = strtol(s.c_str(), &p, 0); + ASSERT(*p == 0); + ASSERT(!errno); + return result; +} + +} // namespace |