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/*
* libexplain - Explain errno values returned by libc functions
* Copyright (C) 2009 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/ctype.h>
#include <libexplain/ac/string.h>
#include <codegen/elastic_buffer.h>
#include <codegen/wrapper.h>
#define DEFAULT_LINE_WIDTH 75
void
wrapper(FILE *fp, const char *prefix, const char *text)
{
size_t prefix_len;
size_t width;
const char *cp;
static elastic_buffer_t line_buf;
static elastic_buffer_t word_buf;
if (!prefix)
prefix = "";
prefix_len = strlen(prefix);
width = DEFAULT_LINE_WIDTH;
if (prefix_len < DEFAULT_LINE_WIDTH)
width = DEFAULT_LINE_WIDTH - prefix_len;
elastic_buffer_rewind(&line_buf);
cp = text;
for (;;)
{
unsigned char c = *cp++;
if (c == '\0')
{
if (line_buf.data_length)
{
fputs(prefix, fp);
elastic_buffer_fwrite(&line_buf, fp);
putc('\n', fp);
}
return;
}
if (isspace(c))
continue;
/*
* Grab the next word.
*/
elastic_buffer_rewind(&word_buf);
for (;;)
{
elastic_buffer_putc(&word_buf, c);
c = *cp;
if (c == '\0')
break;
if (isspace(c))
break;
++cp;
}
if (line_buf.data_length == 0)
{
/* do nothing */
}
else if (line_buf.data_length + 1 + word_buf.data_length <= width)
{
elastic_buffer_putc(&line_buf, ' ');
}
else
{
fputs(prefix, fp);
elastic_buffer_fwrite(&line_buf, fp);
putc('\n', fp);
elastic_buffer_rewind(&line_buf);
}
elastic_buffer_puts(&line_buf, elastic_buffer_get(&word_buf));
}
}
void
wrapper_hang(FILE *fp, const char *prefix, const char *text)
{
size_t prefix_len;
size_t width;
const char *cp;
static elastic_buffer_t line_buf;
static elastic_buffer_t word_buf;
int extra_indent;
if (!prefix)
prefix = "";
prefix_len = strlen(prefix);
width = 80;
if (prefix_len < DEFAULT_LINE_WIDTH)
width -= prefix_len;
elastic_buffer_rewind(&line_buf);
cp = text;
extra_indent = 0;
for (;;)
{
unsigned char c = *cp++;
if (c == '\0')
{
if (line_buf.data_length)
{
fputs(prefix, fp);
if (extra_indent)
fputs(" ", fp);
elastic_buffer_fwrite(&line_buf, fp);
putc('\n', fp);
}
return;
}
if (c == '\t')
{
for (;;)
{
elastic_buffer_putc(&line_buf, ' ');
if (line_buf.data_length >= 16)
break;
}
continue;
}
if (c == '\n')
{
if (line_buf.data_length)
{
fputs(prefix, fp);
if (extra_indent)
fputs(" ", fp);
elastic_buffer_fwrite(&line_buf, fp);
putc('\n', fp);
}
elastic_buffer_rewind(&line_buf);
extra_indent = 0;
continue;
}
if (isspace(c))
continue;
/*
* Grab the next word.
*/
elastic_buffer_rewind(&word_buf);
for (;;)
{
elastic_buffer_putc(&word_buf, c);
c = *cp;
if (c == '\0')
break;
if (isspace(c))
break;
++cp;
}
if (line_buf.data_length == 0)
{
/* do nothing */
}
else if (line_buf.data[line_buf.data_length - 1] == ' ')
{
/* do nothing */
}
else if (line_buf.data_length + 1 + word_buf.data_length <= width)
{
elastic_buffer_putc(&line_buf, ' ');
}
else
{
fputs(prefix, fp);
if (extra_indent)
fputs(" ", fp);
elastic_buffer_fwrite(&line_buf, fp);
putc('\n', fp);
elastic_buffer_rewind(&line_buf);
if (!extra_indent)
{
extra_indent = 1;
width -= 4;
}
}
elastic_buffer_puts(&line_buf, elastic_buffer_get(&word_buf));
}
}
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