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96 lines
2.4 KiB
96 lines
2.4 KiB
4 months ago
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/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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#include "buffer.h"
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bool buffer_init(struct Buffer *b, uint32_t len) {
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if (!b)
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return false;
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b->buffer = calloc(len, 1);
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if (!b->buffer)
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return false;
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b->len = 0;
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b->size = len;
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return true;
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}
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void buffer_free(struct Buffer *b) {
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if (b && b->buffer)
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free(b->buffer);
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}
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bool buffer_read_hex(struct Buffer *b, FILE *fp, bool consume_newline) {
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int offset;
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uint32_t i;
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if (feof(fp))
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return false;
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/* Consume leading whitespace. */
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while (!feof(fp)) {
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char c = fgetc(fp);
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if (!consume_newline && (c == 0x0d || c == 0x0a)) {
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return false;
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}
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if (!isspace(c)) {
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ungetc(c, fp);
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break;
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}
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}
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for (; !feof(fp) && b->len < b->size; ++b->len) {
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b->buffer[b->len] = fgetc(fp);
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if (!isalnum(b->buffer[b->len])) {
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ungetc(b->buffer[b->len], fp);
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break;
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}
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}
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if (b->len == 0)
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return false;
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for (offset = 0, i = 0; offset < (int)b->len && i < b->size; ++i) {
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int last_offset = offset;
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if (sscanf((char *)b->buffer + offset, "%2hhx%n", &b->buffer[i], &offset) !=
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1)
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break;
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offset += last_offset;
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if (offset == 0)
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break;
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}
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b->len = i;
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return true;
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}
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void buffer_dump(const struct Buffer *b, const char *prefix, const char *name,
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uint32_t limit, FILE *fp) {
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fprintf(fp, "%s%s {\n", prefix, name);
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fprintf(fp, "%s .length = %u\n", prefix, b->len);
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fprintf(fp, "%s .size = %u\n", prefix, b->size);
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fprintf(fp, "%s .buffer = {\n", prefix);
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fprintf(fp, "%s ", prefix);
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for (uint32_t i = 0; i < b->len; ++i) {
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if (i > 15 && i % 16 == 0) {
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fprintf(fp, "\n%s ", prefix);
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}
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if (i > limit) {
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fprintf(fp, ". . .");
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break;
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}
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fprintf(fp, "%.2x ", b->buffer[i]);
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}
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fprintf(fp, "\n%s}\n", prefix);
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}
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