blob: 13a7fdf2473c1dc8e5cde0878c460d550c6c743a [file] [log] [blame]
/*
* 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>
namespace android {
Formatter::Formatter(FILE *file)
: mFile(file == NULL ? stdout : file),
mIndentDepth(0),
mAtStartOfLine(true) {
}
Formatter::~Formatter() {
if (mFile != stdout) {
fclose(mFile);
}
mFile = NULL;
}
void Formatter::indent() {
++mIndentDepth;
}
void Formatter::unindent() {
assert(mIndentDepth > 0);
--mIndentDepth;
}
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)(2 * mIndentDepth), "");
mAtStartOfLine = false;
}
output(out.substr(start));
break;
}
if (pos == start) {
fprintf(mFile, "\n");
mAtStartOfLine = true;
} else if (pos > start) {
if (mAtStartOfLine) {
fprintf(mFile, "%*s", (int)(2 * mIndentDepth), "");
}
output(out.substr(start, pos - start + 1));
mAtStartOfLine = true;
}
start = pos + 1;
}
return *this;
}
Formatter &Formatter::operator<<(size_t n) {
return (*this) << std::to_string(n);
}
void Formatter::setNamespace(const std::string &space) {
mSpace = space;
}
void Formatter::output(const std::string &text) const {
const size_t spaceLength = mSpace.size();
if (spaceLength > 0) {
// Remove all occurences of "mSpace" and output the filtered result.
size_t matchPos = text.find(mSpace);
if (matchPos != std::string::npos) {
std::string newText = text.substr(0, matchPos);
size_t startPos = matchPos + spaceLength;
while ((matchPos = text.find(mSpace, startPos))
!= std::string::npos) {
newText.append(text.substr(startPos, matchPos - startPos));
startPos = matchPos + spaceLength;
}
newText.append(text.substr(startPos));
fprintf(mFile, "%s", newText.c_str());
return;
}
}
fprintf(mFile, "%s", text.c_str());
}
} // namespace android