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/*
* libexplain - Explain errno values returned by libc functions
* Copyright (C) 2009, 2010 Peter Miller
* Written by Peter Miller <pmiller@opensource.org.au>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <libexplain/ac/stdarg.h>
#include <libexplain/ac/stdio.h>
#include <libexplain/ac/stdlib.h>
#include <libexplain/ac/string.h>
#include <libexplain/fwrite.h>
#include <libexplain/malloc.h>
#include <codegen/elastic_buffer.h>
void
elastic_buffer_constructor(elastic_buffer_t *sb)
{
sb->data = 0;
sb->data_length = 0;
sb->data_maximum = 0;
}
void
elastic_buffer_destructor(elastic_buffer_t *sb)
{
if (sb->data)
free(sb->data);
sb->data = 0;
sb->data_length = 0;
sb->data_maximum = 0;
}
const char *
elastic_buffer_get(elastic_buffer_t *sb)
{
return (sb->data_length ? sb->data : "");
}
void
elastic_buffer_putc(elastic_buffer_t *sb, char c)
{
if (sb->data_length + 2 > sb->data_maximum)
{
size_t new_maximum;
char *new_data;
new_maximum = sb->data_maximum * 2 + 64;
while (sb->data_length + 2 > new_maximum)
new_maximum = new_maximum * 2 + 64;
new_data = explain_malloc_or_die(new_maximum);
if (sb->data)
{
memcpy(new_data, sb->data, sb->data_length);
free(sb->data);
}
sb->data = new_data;
sb->data_maximum = new_maximum;
}
sb->data[sb->data_length++] = c;
sb->data[sb->data_length] = '\0';
}
void
elastic_buffer_puts(elastic_buffer_t *sb, const char *s)
{
size_t len;
len = strlen(s);
if (sb->data_length + len + 1 > sb->data_maximum)
{
size_t new_maximum;
char *new_data;
new_maximum = sb->data_maximum * 2 + 64;
while (sb->data_length + len + 1 > new_maximum)
new_maximum = new_maximum * 2 + 64;
new_data = explain_malloc_or_die(new_maximum);
if (sb->data)
{
memcpy(new_data, sb->data, sb->data_length);
free(sb->data);
}
sb->data = new_data;
sb->data_maximum = new_maximum;
}
memcpy(sb->data + sb->data_length, s, len + 1);
sb->data_length += len;
}
void
elastic_buffer_printf(elastic_buffer_t *sb, const char *fmt, ...)
{
va_list ap;
char buffer[2000];
va_start(ap, fmt);
vsnprintf(buffer, sizeof(buffer), fmt, ap);
va_end(ap);
elastic_buffer_puts(sb, buffer);
}
void
elastic_buffer_rewind(elastic_buffer_t *sb)
{
sb->data_length = 0;
if (sb->data)
sb->data[0] = '\0';
}
void
elastic_buffer_fwrite(elastic_buffer_t *sb, FILE *fp)
{
explain_fwrite_or_die(sb->data, sb->data_length, 1, fp);
}
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