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/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "Formatter.h"
#include <assert.h>
#include <android-base/logging.h>
namespace android {
Formatter::Formatter() : mFile(nullptr /* invalid */), mIndentDepth(0), mAtStartOfLine(true) {}
Formatter::Formatter(FILE* file, size_t spacesPerIndent)
: mFile(file == nullptr ? stdout : file),
mIndentDepth(0),
mSpacesPerIndent(spacesPerIndent),
mAtStartOfLine(true) {}
Formatter::~Formatter() {
if (mFile != stdout) {
fclose(mFile);
}
mFile = nullptr;
}
void Formatter::indent(size_t level) {
mIndentDepth += level;
}
void Formatter::unindent(size_t level) {
assert(mIndentDepth >= level);
mIndentDepth -= level;
}
Formatter& Formatter::indent(size_t level, const std::function<void(void)>& func) {
this->indent(level);
func();
this->unindent(level);
return *this;
}
Formatter& Formatter::indent(const std::function<void(void)>& func) {
return this->indent(1, func);
}
Formatter& Formatter::block(const std::function<void(void)>& func) {
(*this) << "{\n";
this->indent(func);
return (*this) << "}";
}
void Formatter::setLinePrefix(const std::string &prefix) {
mLinePrefix = prefix;
}
void Formatter::unsetLinePrefix() {
mLinePrefix = "";
}
Formatter &Formatter::endl() {
return (*this) << "\n";
}
Formatter& Formatter::sIf(const std::string& cond, const std::function<void(void)>& block) {
(*this) << "if (" << cond << ") ";
return this->block(block);
}
Formatter& Formatter::sElseIf(const std::string& cond, const std::function<void(void)>& block) {
(*this) << " else if (" << cond << ") ";
return this->block(block);
}
Formatter& Formatter::sElse(const std::function<void(void)>& block) {
(*this) << " else ";
return this->block(block);
}
Formatter& Formatter::sFor(const std::string& stmts, const std::function<void(void)>& block) {
(*this) << "for (" << stmts << ") ";
return this->block(block);
}
Formatter& Formatter::sTry(const std::function<void(void)>& block) {
(*this) << "try ";
return this->block(block);
}
Formatter& Formatter::sCatch(const std::string& exception, const std::function<void(void)>& block) {
(*this) << " catch (" << exception << ") ";
return this->block(block);
}
Formatter& Formatter::sFinally(const std::function<void(void)>& block) {
(*this) << " finally ";
return this->block(block);
}
Formatter& Formatter::sWhile(const std::string& cond, const std::function<void(void)>& block) {
(*this) << "while (" << cond << ") ";
return this->block(block);
}
Formatter &Formatter::operator<<(const std::string &out) {
const size_t len = out.length();
size_t start = 0;
while (start < len) {
size_t pos = out.find('\n', start);
if (pos == std::string::npos) {
if (mAtStartOfLine) {
fprintf(mFile, "%*s", (int)(mSpacesPerIndent * mIndentDepth), "");
fprintf(mFile, "%s", mLinePrefix.c_str());
mAtStartOfLine = false;
}
output(out.substr(start));
break;
}
if (mAtStartOfLine && (pos > start || !mLinePrefix.empty())) {
fprintf(mFile, "%*s", (int)(mSpacesPerIndent * mIndentDepth), "");
fprintf(mFile, "%s", mLinePrefix.c_str());
}
if (pos == start) {
fprintf(mFile, "\n");
mAtStartOfLine = true;
} else if (pos > start) {
output(out.substr(start, pos - start + 1));
mAtStartOfLine = true;
}
start = pos + 1;
}
return *this;
}
// NOLINT to suppress missing parentheses warning about __type__.
#define FORMATTER_INPUT_INTEGER(__type__) \
Formatter& Formatter::operator<<(__type__ n) { /* NOLINT */ \
return (*this) << std::to_string(n); \
}
FORMATTER_INPUT_INTEGER(short);
FORMATTER_INPUT_INTEGER(unsigned short);
FORMATTER_INPUT_INTEGER(int);
FORMATTER_INPUT_INTEGER(unsigned int);
FORMATTER_INPUT_INTEGER(long);
FORMATTER_INPUT_INTEGER(unsigned long);
FORMATTER_INPUT_INTEGER(long long);
FORMATTER_INPUT_INTEGER(unsigned long long);
FORMATTER_INPUT_INTEGER(float);
FORMATTER_INPUT_INTEGER(double);
FORMATTER_INPUT_INTEGER(long double);
#undef FORMATTER_INPUT_INTEGER
// NOLINT to suppress missing parentheses warning about __type__.
#define FORMATTER_INPUT_CHAR(__type__) \
Formatter& Formatter::operator<<(__type__ c) { /* NOLINT */ \
return (*this) << std::string(1, (char)c); \
}
FORMATTER_INPUT_CHAR(char);
FORMATTER_INPUT_CHAR(signed char);
FORMATTER_INPUT_CHAR(unsigned char);
#undef FORMATTER_INPUT_CHAR
void Formatter::setNamespace(const std::string &space) {
mSpace = space;
}
bool Formatter::isValid() const {
return mFile != nullptr;
}
void Formatter::output(const std::string &text) const {
CHECK(isValid());
fprintf(mFile, "%s", text.c_str());
}
} // namespace android
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