+++ /dev/null
-/*
- * libmm-fileinfo
- *
- * Copyright (c) 2000 - 2011 Samsung Electronics Co., Ltd. All rights reserved.
- *
- * Contact: Haejeong Kim <backto.kim@samsung.com>
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- */
-
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include <unistd.h>
-#include <sys/types.h>
-#include <sys/mman.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-
-#include "mm_file_debug.h"
-#include "mm_file_utils.h"
-
-
-typedef struct {
- int fd;
- unsigned char *ptr;
- long long size;
- long long offset;
- int state;
-} MMFMMapIOHandle;
-
-static int mmf_mmap_open(MMFileIOHandle *handle, const char *filename, int flags)
-{
- MMFMMapIOHandle *mmapHandle = NULL;
- struct stat finfo = {0, };
- int access = O_RDONLY;
-
- if (!handle || !filename || !handle->iofunc || !handle->iofunc->handleName) {
- debug_error(DEBUG, "invalid param\n");
- return MMFILE_UTIL_FAIL;
- }
-
- filename += strlen(handle->iofunc->handleName) + 3; /* :// */
-
- mmapHandle = g_new0(MMFMMapIOHandle, 1);
-
-#ifdef O_BINARY
- access |= O_BINARY;
-#endif
-
- mmapHandle->fd = open(filename, access);
- if (mmapHandle->fd < 0) {
- debug_error(DEBUG, "error: open error: %s\n", filename);
- goto exception;
- }
-
- if (fstat(mmapHandle->fd, &finfo) == -1) {
- debug_error(DEBUG, "error: fstat\n");
- goto exception;
- }
-
- if (!S_ISREG(finfo.st_mode)) {
- debug_error(DEBUG, "error: it is not regular file\n");
- goto exception;
- }
-
- mmapHandle->size = finfo.st_size;
- mmapHandle->offset = 0;
- mmapHandle->state = 0;
-
- /*mmapHandle->ptr = mmap64(0, mmapHandle->size, PROT_READ, MAP_SHARED, mmapHandle->fd, 0); */
- mmapHandle->ptr = mmap(0, mmapHandle->size, PROT_READ, MAP_SHARED, mmapHandle->fd, 0);
-
- if (mmapHandle->ptr == (void *)-1) {
- debug_error(DEBUG, "error: mmap\n");
- mmapHandle->ptr = NULL;
- goto exception;
- }
-
- handle->privateData = (void *) mmapHandle;
-
- return MMFILE_UTIL_SUCCESS;
-
-exception:
- if (mmapHandle->ptr) {
- munmap(mmapHandle->ptr, mmapHandle->size);
- }
-
- if (mmapHandle->fd > 2) {
- close(mmapHandle->fd);
- }
-
- mmfile_free(mmapHandle);
- handle->privateData = NULL;
-
- return MMFILE_UTIL_FAIL;
-}
-
-static int mmf_mmap_read(MMFileIOHandle *h, unsigned char *buf, int size)
-{
- MMFMMapIOHandle *mmapHandle = NULL;
- const unsigned char *c = NULL;
- int len = 0;
-
- if (!h || !h->privateData || !buf || size <= 0) {
- debug_error(DEBUG, "invalid para\n");
- return MMFILE_UTIL_FAIL;
- }
-
- mmapHandle = h->privateData;
-
- c = mmapHandle->ptr + mmapHandle->offset;
-
- if (mmapHandle->state != EOF) {
- len = size;
- if (len + mmapHandle->offset > mmapHandle->size) {
- len = mmapHandle->size - mmapHandle->offset;
- }
- } else {
- return 0;
- }
-
- memcpy(buf, c, len);
-
- mmapHandle->offset += len;
-
- if (mmapHandle->offset == mmapHandle->size) {
- mmapHandle->state = EOF;
- }
-
- return len;
-}
-
-static int mmf_mmap_write(MMFileIOHandle *h, unsigned char *buf, int size)
-{
- MMFMMapIOHandle *mmapHandle = NULL;
- unsigned char *c = NULL;
- int len = 0;
-
- if (!h || !h->privateData || !buf) {
- debug_error(DEBUG, "invalid para\n");
- return MMFILE_UTIL_FAIL;
- }
-
- mmapHandle = h->privateData;
-
- c = mmapHandle->ptr + mmapHandle->offset;
-
- if (mmapHandle->state != EOF) {
- len = size;
- if (len + mmapHandle->offset > mmapHandle->size) {
- len = mmapHandle->size - mmapHandle->offset;
- }
- } else {
- return 0;
- }
-
- memcpy(c, buf, len);
-
- mmapHandle->offset += len;
-
- if (mmapHandle->offset == mmapHandle->size) {
- mmapHandle->state = EOF;
- }
-
- return len;
-}
-
-
-static int64_t mmf_mmap_seek(MMFileIOHandle *h, int64_t pos, int whence)
-{
- MMFMMapIOHandle *mmapHandle = NULL;
- long tmp_offset = 0;
-
- if (!h || !h->privateData) {
- debug_error(DEBUG, "invalid para\n");
- return MMFILE_UTIL_FAIL;
- }
-
- mmapHandle = h->privateData;
-
- switch (whence) {
- case SEEK_SET:
- tmp_offset = 0 + pos;
- break;
- case SEEK_CUR:
- tmp_offset = mmapHandle->offset + pos;
- break;
- case SEEK_END:
- tmp_offset = mmapHandle->size + pos;
- break;
- default:
- return MMFILE_UTIL_FAIL;
- }
-
- /*check validation*/
- if (tmp_offset < 0) {
- debug_error(DEBUG, "invalid file offset\n");
- return MMFILE_UTIL_FAIL;
- }
-
- /*set */
- mmapHandle->state = (tmp_offset >= mmapHandle->size) ? EOF : !EOF;
- mmapHandle->offset = tmp_offset;
-
- return mmapHandle->offset;
-}
-
-
-static long long mmf_mmap_tell(MMFileIOHandle *h)
-{
- MMFMMapIOHandle *mmapHandle = NULL;
-
- if (!h || !h->privateData) {
- debug_error(DEBUG, "invalid para\n");
- return MMFILE_UTIL_FAIL;
- }
-
- mmapHandle = h->privateData;
-
- return mmapHandle->offset;
-}
-
-static int mmf_mmap_close(MMFileIOHandle *h)
-{
- MMFMMapIOHandle *mmapHandle = NULL;
-
- if (!h || !h->privateData) {
- debug_error(DEBUG, "invalid para\n");
- return MMFILE_UTIL_FAIL;
- }
-
- mmapHandle = h->privateData;
-
- if (mmapHandle) {
- if (mmapHandle->ptr) {
- munmap(mmapHandle->ptr, mmapHandle->size);
- }
-
- if (mmapHandle->fd > 2) {
- close(mmapHandle->fd);
- }
-
- mmfile_free(mmapHandle);
- }
-
- h->privateData = NULL;
-
- return MMFILE_UTIL_SUCCESS;
-}
-
-
-MMFileIOFunc mmfile_mmap_io_handler = {
- "mmap",
- mmf_mmap_open,
- mmf_mmap_read,
- mmf_mmap_write,
- mmf_mmap_seek,
- mmf_mmap_tell,
- mmf_mmap_close,
- NULL
-};
projects / platform / core / multimedia / libmm-fileinfo.git / commitdiff