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/* $Id$ */
#include <pj/file_io.h>
#include <pj/assert.h>
#include <pj/errno.h>
#include <stdio.h>
#include <errno.h>
PJ_DEF(pj_status_t) pj_file_open( pj_pool_t *pool,
const char *pathname,
unsigned flags,
pj_oshandle_t *fd)
{
char mode[8];
char *p = mode;
PJ_ASSERT_RETURN(pathname && fd, PJ_EINVAL);
PJ_UNUSED_ARG(pool);
if ((flags & PJ_O_APPEND) == PJ_O_APPEND) {
if ((flags & PJ_O_WRONLY) == PJ_O_WRONLY) {
*p++ = 'a';
if ((flags & PJ_O_RDONLY) == PJ_O_RDONLY)
*p++ = '+';
} else {
/* This is invalid.
* Can not specify PJ_O_RDONLY with PJ_O_APPEND!
*/
}
} else {
if ((flags & PJ_O_RDONLY) == PJ_O_RDONLY) {
*p++ = 'r';
if ((flags & PJ_O_WRONLY) == PJ_O_WRONLY)
*p++ = '+';
} else {
*p++ = 'w';
}
}
if (p==mode)
return PJ_EINVAL;
*p++ = 'b';
*p++ = '\0';
*fd = fopen(pathname, mode);
if (*fd == NULL)
return PJ_RETURN_OS_ERROR(errno);
return PJ_SUCCESS;
}
PJ_DEF(pj_status_t) pj_file_close(pj_oshandle_t fd)
{
PJ_ASSERT_RETURN(fd, PJ_EINVAL);
if (fclose((FILE*)fd) != 0)
return PJ_RETURN_OS_ERROR(errno);
return PJ_SUCCESS;
}
PJ_DEF(pj_status_t) pj_file_write( pj_oshandle_t fd,
const void *data,
pj_ssize_t *size)
{
size_t written;
clearerr((FILE*)fd);
written = fwrite(data, 1, *size, (FILE*)fd);
if (ferror((FILE*)fd)) {
return PJ_RETURN_OS_ERROR(errno);
}
*size = written;
return PJ_SUCCESS;
}
PJ_DEF(pj_status_t) pj_file_read( pj_oshandle_t fd,
void *data,
pj_ssize_t *size)
{
size_t bytes;
clearerr((FILE*)fd);
bytes = fread(data, 1, *size, (FILE*)fd);
if (ferror((FILE*)fd)) {
return PJ_RETURN_OS_ERROR(errno);
}
*size = bytes;
return PJ_SUCCESS;
}
PJ_DEF(pj_bool_t) pj_file_eof(pj_oshandle_t fd, enum pj_file_access access)
{
PJ_UNUSED_ARG(access);
return feof((FILE*)fd) ? PJ_TRUE : 0;
}
PJ_DEF(pj_status_t) pj_file_setpos( pj_oshandle_t fd,
pj_off_t offset,
enum pj_file_seek_type whence)
{
int mode;
switch (whence) {
case PJ_SEEK_SET:
mode = SEEK_SET; break;
case PJ_SEEK_CUR:
mode = SEEK_CUR; break;
case PJ_SEEK_END:
mode = SEEK_END; break;
default:
pj_assert(!"Invalid whence in file_setpos");
return PJ_EINVAL;
}
if (fseek((FILE*)fd, (long)offset, mode) != 0)
return PJ_RETURN_OS_ERROR(errno);
return PJ_SUCCESS;
}
PJ_DEF(pj_status_t) pj_file_getpos( pj_oshandle_t fd,
pj_off_t *pos)
{
long offset;
offset = ftell((FILE*)fd);
if (offset == -1) {
*pos = -1;
return PJ_RETURN_OS_ERROR(errno);
}
*pos = offset;
return PJ_SUCCESS;
}
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