/*
|
* 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 "printer.h"
|
|
#include <unistd.h>
|
#include <stdlib.h>
|
#include <string.h>
|
#include <stdarg.h>
|
|
#define INITIAL_BUF_SIZE (16*1024)
|
|
char const* SPACES = " ";
|
const int SPACE_COUNT = strlen(SPACES);
|
|
Out::Out(int fd)
|
:mOut(fd == STDOUT_FILENO ? stdout : fdopen(fd, "w")),
|
mBufSize(INITIAL_BUF_SIZE),
|
mBuf((char*)malloc(INITIAL_BUF_SIZE)),
|
mIndent(0),
|
mPendingIndent(false)
|
{
|
}
|
|
Out::~Out()
|
{
|
fclose(mOut);
|
}
|
|
int
|
Out::reallocate(int size)
|
{
|
if (size > mBufSize) {
|
char* p = (char*)malloc(size);
|
if (p != NULL) {
|
free(mBuf);
|
mBufSize = size;
|
mBuf = p;
|
return size;
|
}
|
}
|
return mBufSize;
|
}
|
|
void
|
Out::printf(const char* format, ...)
|
{
|
if (mPendingIndent) {
|
print_indent();
|
mPendingIndent = false;
|
}
|
|
int len;
|
|
va_list args;
|
va_start(args, format);
|
|
len = vsnprintf(mBuf, mBufSize, format, args);
|
va_end(args);
|
|
va_start(args, format);
|
len = vsnprintf(mBuf, mBufSize, format, args);
|
va_end(args);
|
|
if (len > 0) {
|
if (mIndent == 0) {
|
fwrite(mBuf, len, 1, mOut);
|
} else {
|
char* last = mBuf;
|
char* p;
|
do {
|
p = strchr(last, '\n');
|
int size = p != NULL ? p - last + 1 : strlen(last);
|
fwrite(last, size, 1, mOut);
|
if (p != NULL) {
|
if (p[1] == '\0') {
|
mPendingIndent = true;
|
} else {
|
print_indent();
|
}
|
}
|
last = p+1;
|
} while (p != NULL);
|
}
|
}
|
}
|
|
void
|
Out::indent()
|
{
|
mPendingIndent = true;
|
mIndent += 2;
|
}
|
|
void
|
Out::dedent()
|
{
|
if (mIndent > 0) {
|
mIndent -= 2;
|
}
|
}
|
|
void
|
Out::print_indent()
|
{
|
#if 0
|
fprintf(mOut, "[%d]", mIndent);
|
#else
|
int indent = mIndent;
|
while (indent > SPACE_COUNT) {
|
fwrite(SPACES, SPACE_COUNT, 1, mOut);
|
indent -= SPACE_COUNT;
|
}
|
fwrite(SPACES + SPACE_COUNT - indent, indent, 1, mOut);
|
#endif
|
}
|
