1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include "util.h" 18 19 #include <stdio.h> 20 #include <stdlib.h> 21 22 #include "libfdt.h" 23 #include "libufdt_sysdeps.h" 24 25 static char *load_file_contents(FILE *fp, size_t *len_ptr) { 26 // Gets the file size. 27 fseek(fp, 0, SEEK_END); 28 size_t len = ftell(fp); 29 fseek(fp, 0, SEEK_SET); 30 31 char *buf = malloc(len); 32 if (buf == NULL) { 33 return NULL; 34 } 35 36 if (fread(buf, len, 1, fp) != 1) { 37 free(buf); 38 return NULL; 39 } 40 41 if (len_ptr) { 42 *len_ptr = len; 43 } 44 45 return buf; 46 } 47 48 char *load_file(const char *filename, size_t *len_ptr) { 49 FILE *fp = fopen(filename, "r"); 50 if (!fp) { 51 return NULL; 52 } 53 54 char *buf = load_file_contents(fp, len_ptr); 55 56 fclose(fp); 57 58 return buf; 59 } 60 61 int write_buf_to_file(const char *filename, 62 const void *buf, size_t buf_size) { 63 int ret = 0; 64 FILE *fout = NULL; 65 66 fout = fopen(filename, "wb"); 67 if (!fout) { 68 ret = 1; 69 goto end; 70 } 71 if (fwrite(buf, 1, buf_size, fout) < 1) { 72 ret = 2; 73 goto end; 74 } 75 76 end: 77 if (fout) fclose(fout); 78 79 return ret; 80 } 81 82 int write_fdt_to_file(const char *filename, const void *fdt) { 83 return write_buf_to_file(filename, fdt, fdt_totalsize(fdt)); 84 } 85
