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92 lines
2.1 KiB
C
92 lines
2.1 KiB
C
/* radare - LGPL - Copyright 2008-2010 pancake<nopcode.org> */
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include "r_io.h"
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#include "r_list.h"
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R_API void r_io_map_init(struct r_io_t *io) {
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io->maps = r_list_new ();
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}
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R_API struct r_io_map_t *r_io_map_resolve(struct r_io_t *io, int fd) {
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RIOMap *map;
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RListIter *iter;
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r_list_foreach (io->maps, iter, map) {
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if (map->fd == fd)
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return map;
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}
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return NULL;
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}
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R_API int r_io_map_del(struct r_io_t *io, int fd) {
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int ret = R_FALSE;
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RIOMap *map;
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RListIter *iter;
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r_list_foreach (io->maps, iter, map) {
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if (fd==-1 || map->fd==fd) {
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r_list_delete (io->maps, iter);
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ret = R_TRUE;
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}
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}
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return ret;
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}
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R_API int r_io_map_add(struct r_io_t *io, int fd, int flags, ut64 delta, ut64 offset, ut64 size) {
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RIOMap *im = R_NEW (RIOMap);
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if (im == NULL)
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return R_FALSE;
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im->fd = fd;
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im->flags = flags;
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im->delta = delta;
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im->from = offset;
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im->to = offset + size;
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r_list_append (io->maps, im);
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return R_TRUE;
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}
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R_API int r_io_map_read_at(struct r_io_t *io, ut64 off, ut8 *buf, int len) {
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RIOMap *im;
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RListIter *iter;
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r_list_foreach (io->maps, iter, im) { // _prev?
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if (im && off >= im->from && off < im->to) {
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r_io_set_fd (io, im->fd);
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return r_io_read_at (io, off-im->from + im->delta, buf, len);
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}
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}
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return -1;
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}
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R_API int r_io_map_write_at(struct r_io_t *io, ut64 off, const ut8 *buf, int len) {
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RIOMap *im;
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RListIter *iter;
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r_list_foreach (io->maps, iter, im) {
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if (im && off >= im->from && off < im->to) {
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if (im->flags & R_IO_WRITE) {
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r_io_set_fd (io, im->fd);
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return r_io_write_at (io, off-im->from + im->delta, buf, len);
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} else return -1;
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}
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}
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return 0;
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}
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// DEPRECATE ??? DEPREACATE
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#if 0
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int r_io_map_read_rest(struct r_io_t *io, ut64 off, ut8 *buf, ut64 len)
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{
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struct list_head *pos;
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list_for_each_prev(pos, &io->maps) {
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struct r_io_map_t *im = list_entry(pos, struct r_io_map_t, list);
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if (im->file[0] != '\0' && off+len >= im->from && off < im->to) {
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lseek(im->fd, 0, SEEK_SET);
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// XXX VERY BROKEN
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return read(im->fd, buf+(im->from-(off+len)), len);
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}
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}
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return 0;
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}
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#endif
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