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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 = stream_read(source, 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)
stream_write(dest, buffer + pos, i - pos);
stream_write(dest, eoln, strlen(eoln));
}
pos = i + 1;
break;
}
hit_cr = (buffer[i] == '\r');
}
if (i > pos)
stream_write(dest, 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 *mem_stream;
mem_stream = stream_open_mem(nullptr, 0);
if (!mem_stream)
{
err = IMGTOOLERR_OUTOFMEMORY;
goto done;
}
err = imgtool_partition_read_file(partition, filename, fork, mem_stream, nullptr);
if (err)
goto done;
stream_seek(mem_stream, SEEK_SET, 0);
err = convert_stream_eolns(mem_stream, destf, EOLN);
if (err)
goto done;
done:
if (mem_stream)
stream_close(mem_stream);
return err;
}
static imgtoolerr_t ascii_writefile(imgtool_partition *partition, const char *filename, const char *fork, imgtool_stream *sourcef, option_resolution *opts)
{
imgtoolerr_t err;
imgtool_stream *mem_stream = nullptr;
const char *eoln;
/* create a stream */
mem_stream = stream_open_mem(nullptr, 0);
if (!mem_stream)
{
err = IMGTOOLERR_OUTOFMEMORY;
goto done;
}
eoln = imgtool_partition_get_info_string(partition, IMGTOOLINFO_STR_EOLN);
err = convert_stream_eolns(sourcef, mem_stream, eoln);
if (err)
goto done;
stream_seek(mem_stream, SEEK_SET, 0);
err = imgtool_partition_write_file(partition, filename, fork, mem_stream, opts, nullptr);
if (err)
goto done;
done:
if (mem_stream)
stream_close(mem_stream);
return err;
}
void filter_eoln_getinfo(UINT32 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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