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// license:BSD-3-Clause
// copyright-holders:Nathan Woods
/****************************************************************************
filteoln.c
Native end-of-line filter
*****************************************************************************/
#include <string.h>
#include "imgtool.h"
#define EOLN (CRLF == 1 ? "\r" : (CRLF == 2 ? "\n" : (CRLF == 3 ? "\r\n" : NULL)))
static imgtoolerr_t convert_stream_eolns(imgtool::stream &source, imgtool::stream &dest, const char *eoln)
{
size_t len, i, pos;
char buffer[2000];
int hit_cr = false;
while((len = source.read(buffer, sizeof(buffer))) > 0)
{
pos = 0;
for (i = 0; i < len; i++)
{
switch(buffer[i])
{
case '\r':
case '\n':
if (!hit_cr || (buffer[i] != '\n'))
{
if (i > pos)
dest.write(buffer + pos, i - pos);
dest.write(eoln, strlen(eoln));
}
pos = i + 1;
break;
}
hit_cr = (buffer[i] == '\r');
}
if (i > pos)
dest.write(buffer + pos, i - pos);
}
return IMGTOOLERR_SUCCESS;
}
static imgtoolerr_t ascii_readfile(imgtool::partition &partition, const char *filename, const char *fork, imgtool::stream &destf)
{
imgtoolerr_t err;
imgtool::stream::ptr mem_stream;
mem_stream = imgtool::stream::open_mem(nullptr, 0);
if (!mem_stream)
return IMGTOOLERR_OUTOFMEMORY;
err = partition.read_file(filename, fork, *mem_stream, nullptr);
if (err)
return err;
mem_stream->seek(SEEK_SET, 0);
return convert_stream_eolns(*mem_stream, destf, EOLN);
}
static imgtoolerr_t ascii_writefile(imgtool::partition &partition, const char *filename, const char *fork, imgtool::stream &sourcef, util::option_resolution *opts)
{
imgtoolerr_t err;
imgtool::stream::ptr mem_stream;
const char *eoln;
/* create a stream */
mem_stream = imgtool::stream::open_mem(nullptr, 0);
if (!mem_stream)
return IMGTOOLERR_OUTOFMEMORY;
eoln = partition.get_info_string(IMGTOOLINFO_STR_EOLN);
err = convert_stream_eolns(sourcef, *mem_stream, eoln);
if (err)
return err;
mem_stream->seek(SEEK_SET, 0);
return partition.write_file(filename, fork, *mem_stream, opts, nullptr);
}
void filter_eoln_getinfo(uint32_t state, union filterinfo *info)
{
switch(state)
{
case FILTINFO_STR_NAME: info->s = "ascii"; break;
case FILTINFO_STR_HUMANNAME: info->s = "Ascii"; break;
case FILTINFO_PTR_READFILE: info->read_file = ascii_readfile; break;
case FILTINFO_PTR_WRITEFILE: info->write_file = ascii_writefile; break;
}
}
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