e955c94ed3
Listing the "Blender Foundation" as copyright holder implied the Blender Foundation holds copyright to files which may include work from many developers. While keeping copyright on headers makes sense for isolated libraries, Blender's own code may be refactored or moved between files in a way that makes the per file copyright holders less meaningful. Copyright references to the "Blender Foundation" have been replaced with "Blender Authors", with the exception of `./extern/` since these this contains libraries which are more isolated, any changed to license headers there can be handled on a case-by-case basis. Some directories in `./intern/` have also been excluded: - `./intern/cycles/` it's own `AUTHORS` file is planned. - `./intern/opensubdiv/`. An "AUTHORS" file has been added, using the chromium projects authors file as a template. Design task: #110784 Ref !110783.
103 lines
2.8 KiB
C++
103 lines
2.8 KiB
C++
/* SPDX-FileCopyrightText: 2010 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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/** \file
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* \ingroup GHOST
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*/
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#include <cassert>
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#include <cctype>
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#include <cstdio>
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#include <cstdlib>
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#include <cstring>
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#include "GHOST_PathUtils.hh"
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#include "GHOST_Types.h"
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/* Based on: https://stackoverflow.com/a/2766963/432509 */
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using DecodeState_e = enum DecodeState_e {
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/** Searching for an ampersand to convert. */
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STATE_SEARCH = 0,
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/** Convert the two proceeding characters from hex. */
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STATE_CONVERTING
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};
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void GHOST_URL_decode(char *buf_dst, int buf_dst_size, const char *buf_src)
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{
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const uint buf_src_len = strlen(buf_src);
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DecodeState_e state = STATE_SEARCH;
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uint ascii_character;
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memset(buf_dst, 0, buf_dst_size);
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for (uint i = 0; i < buf_src_len; i++) {
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switch (state) {
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case STATE_SEARCH: {
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if (buf_src[i] != '%') {
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strncat(buf_dst, &buf_src[i], 1);
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assert(int(strlen(buf_dst)) < buf_dst_size);
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break;
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}
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/* We are now converting. */
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state = STATE_CONVERTING;
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break;
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}
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case STATE_CONVERTING: {
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/* Create a buffer to hold the hex. For example, if `%20`,
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* this buffer would hold 20 (in ASCII). */
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char temp_num_buf[3];
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/* Conversion complete (i.e. don't convert again next iteration). */
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state = STATE_SEARCH;
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/* Ensure both characters are hexadecimal. */
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bool both_digits = true;
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for (int j = 0; j < 2; j++) {
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/* `isxdigit` serves to early null terminate the string too. */
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const char hex_char = buf_src[i + j];
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if (!isxdigit(hex_char)) {
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both_digits = false;
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break;
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}
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temp_num_buf[j] = hex_char;
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}
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if (!both_digits) {
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break;
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}
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/* Convert two hexadecimal characters into one character. */
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temp_num_buf[2] = '\0';
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sscanf(temp_num_buf, "%x", &ascii_character);
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/* Ensure we aren't going to overflow. */
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assert(int(strlen(buf_dst)) < buf_dst_size);
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/* Concatenate this character onto the output. */
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strncat(buf_dst, (char *)&ascii_character, 1);
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/* Skip the next character. */
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i++;
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break;
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}
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}
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}
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}
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char *GHOST_URL_decode_alloc(const char *buf_src)
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{
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/* Assume one character of encoded URL can be expanded to 4 chars max. */
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const size_t decoded_size_max = 4 * strlen(buf_src) + 1;
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char *buf_dst = (char *)malloc(decoded_size_max);
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GHOST_URL_decode(buf_dst, decoded_size_max, buf_src);
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const size_t decoded_size = strlen(buf_dst) + 1;
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if (decoded_size != decoded_size_max) {
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char *buf_dst_trim = (char *)malloc(decoded_size);
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memcpy(buf_dst_trim, buf_dst, decoded_size);
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free(buf_dst);
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buf_dst = buf_dst_trim;
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}
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return buf_dst;
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}
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