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142 lines
3.9 KiB
142 lines
3.9 KiB
/*
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* Copyright 2017 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SKSL_STRING
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#define SKSL_STRING
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#include "include/private/SkSLDefines.h"
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#include <cstring>
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#include <stdarg.h>
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#include <string>
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#ifndef SKSL_STANDALONE
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#include "include/core/SkString.h"
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#endif
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namespace SkSL {
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class String;
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// Represents a (not necessarily null-terminated) slice of a string.
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struct StringFragment {
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StringFragment()
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: fChars("")
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, fLength(0) {}
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StringFragment(const char* chars)
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: fChars(chars)
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, fLength(strlen(chars)) {}
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StringFragment(const char* chars, size_t length)
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: fChars(chars)
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, fLength(length) {}
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const char* begin() const { return fChars; }
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const char* end() const { return fChars + fLength; }
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const char* data() const { return fChars; }
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size_t size() const { return fLength; }
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size_t length() const { return fLength; }
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char operator[](size_t idx) const { return fChars[idx]; }
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bool startsWith(const char prefix[]) const;
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bool endsWith(const char suffix[]) const;
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bool operator==(const char* s) const;
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bool operator!=(const char* s) const;
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bool operator==(StringFragment s) const;
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bool operator!=(StringFragment s) const;
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bool operator<(StringFragment s) const;
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String operator+(const char* s) const;
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String operator+(const StringFragment& s) const;
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String operator+(const String& s) const;
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#ifndef SKSL_STANDALONE
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operator SkString() const { return SkString(fChars, fLength); }
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#endif
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const char* fChars;
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size_t fLength;
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};
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bool operator==(const char* s1, StringFragment s2);
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bool operator!=(const char* s1, StringFragment s2);
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class SK_API String : public std::string {
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public:
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using std::string::string;
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explicit String(std::string s) : INHERITED(std::move(s)) {}
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String(StringFragment s) : INHERITED(s.fChars, s.fLength) {}
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static String printf(const char* fmt, ...) SK_PRINTF_LIKE(1, 2);
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void appendf(const char* fmt, ...) SK_PRINTF_LIKE(2, 3);
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void vappendf(const char* fmt, va_list va);
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bool startsWith(const char prefix[]) const {
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return StringFragment(data(), size()).startsWith(prefix);
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}
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bool endsWith(const char suffix[]) const {
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return StringFragment(data(), size()).endsWith(suffix);
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}
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bool consumeSuffix(const char suffix[]);
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String operator+(const char* s) const;
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String operator+(const String& s) const;
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String operator+(StringFragment s) const;
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String& operator+=(char c);
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String& operator+=(const char* s);
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String& operator+=(const String& s);
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String& operator+=(StringFragment s);
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bool operator==(const char* s) const;
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bool operator!=(const char* s) const;
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bool operator==(const String& s) const;
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bool operator!=(const String& s) const;
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friend String operator+(const char* s1, const String& s2);
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friend bool operator==(const char* s1, const String& s2);
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friend bool operator!=(const char* s1, const String& s2);
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private:
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using INHERITED = std::string;
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};
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String operator+(const char* s1, const String& s2);
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bool operator!=(const char* s1, const String& s2);
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String to_string(double value);
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String to_string(int32_t value);
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String to_string(uint32_t value);
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String to_string(int64_t value);
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String to_string(uint64_t value);
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bool stod(const StringFragment& s, SKSL_FLOAT* value);
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bool stoi(const StringFragment& s, SKSL_INT* value);
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} // namespace SkSL
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namespace std {
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template<> struct hash<SkSL::StringFragment> {
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size_t operator()(const SkSL::StringFragment& s) const {
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size_t result = 0;
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for (size_t i = 0; i < s.fLength; ++i) {
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result = result * 101 + (size_t) s.fChars[i];
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}
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return result;
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}
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};
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template<> struct hash<SkSL::String> {
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size_t operator()(const SkSL::String& s) const {
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return hash<std::string>{}(s);
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}
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};
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} // namespace std
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#endif
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