| /* |
| * Copyright (C) 2017 The Android Open Source Project |
| * |
| * 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 "buffer.h" |
| |
| bool buffer_init(struct Buffer *b, uint32_t len) { |
| if (!b) |
| return false; |
| b->buffer = calloc(len, 1); |
| if (!b->buffer) |
| return false; |
| b->len = 0; |
| b->size = len; |
| return true; |
| } |
| |
| void buffer_free(struct Buffer *b) { |
| if (b && b->buffer) |
| free(b->buffer); |
| } |
| |
| bool buffer_read_hex(struct Buffer *b, FILE *fp, bool consume_newline) { |
| int offset; |
| uint32_t i; |
| |
| if (feof(fp)) |
| return false; |
| /* Consume leading whitespace. */ |
| while (!feof(fp)) { |
| char c = fgetc(fp); |
| if (!consume_newline && (c == 0x0d || c == 0x0a)) { |
| return false; |
| } |
| if (!isspace(c)) { |
| ungetc(c, fp); |
| break; |
| } |
| } |
| |
| for (; !feof(fp) && b->len < b->size; ++b->len) { |
| b->buffer[b->len] = fgetc(fp); |
| if (!isalnum(b->buffer[b->len])) { |
| ungetc(b->buffer[b->len], fp); |
| break; |
| } |
| } |
| if (b->len == 0) |
| return false; |
| |
| for (offset = 0, i = 0; offset < (int)b->len && i < b->size; ++i) { |
| int last_offset = offset; |
| if (sscanf((char *)b->buffer + offset, "%2hhx%n", &b->buffer[i], &offset) != |
| 1) |
| break; |
| offset += last_offset; |
| if (offset == 0) |
| break; |
| } |
| b->len = i; |
| return true; |
| } |
| |
| void buffer_dump(const struct Buffer *b, const char *prefix, const char *name, |
| uint32_t limit, FILE *fp) { |
| fprintf(fp, "%s%s {\n", prefix, name); |
| fprintf(fp, "%s .length = %u\n", prefix, b->len); |
| fprintf(fp, "%s .size = %u\n", prefix, b->size); |
| fprintf(fp, "%s .buffer = {\n", prefix); |
| fprintf(fp, "%s ", prefix); |
| for (uint32_t i = 0; i < b->len; ++i) { |
| if (i > 15 && i % 16 == 0) { |
| fprintf(fp, "\n%s ", prefix); |
| } |
| if (i > limit) { |
| fprintf(fp, ". . ."); |
| break; |
| } |
| fprintf(fp, "%.2x ", b->buffer[i]); |
| } |
| fprintf(fp, "\n%s}\n", prefix); |
| } |