Green Sky
67653bbe50
git-subtree-dir: external/libwebp/libwebp git-subtree-split: dd7364c3cefe0f5c0b3c18c3b1887d353f90fc1f
140 lines
4.1 KiB
C
140 lines
4.1 KiB
C
// Copyright 2012 Google Inc. All Rights Reserved.
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//
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// Use of this source code is governed by a BSD-style license
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// that can be found in the COPYING file in the root of the source
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// tree. An additional intellectual property rights grant can be found
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// in the file PATENTS. All contributing project authors may
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// be found in the AUTHORS file in the root of the source tree.
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// -----------------------------------------------------------------------------
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//
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// Utility functions used by the example programs.
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//
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#include "./example_util.h"
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#include <assert.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "webp/mux_types.h"
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#include "../imageio/imageio_util.h"
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//------------------------------------------------------------------------------
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// String parsing
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uint32_t ExUtilGetUInt(const char* const v, int base, int* const error) {
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char* end = NULL;
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const uint32_t n = (v != NULL) ? (uint32_t)strtoul(v, &end, base) : 0u;
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if (end == v && error != NULL && !*error) {
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*error = 1;
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fprintf(stderr, "Error! '%s' is not an integer.\n",
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(v != NULL) ? v : "(null)");
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}
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return n;
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}
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int ExUtilGetInt(const char* const v, int base, int* const error) {
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return (int)ExUtilGetUInt(v, base, error);
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}
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int ExUtilGetInts(const char* v, int base, int max_output, int output[]) {
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int n, error = 0;
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for (n = 0; v != NULL && n < max_output; ++n) {
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const int value = ExUtilGetInt(v, base, &error);
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if (error) return -1;
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output[n] = value;
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v = strchr(v, ',');
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if (v != NULL) ++v; // skip over the trailing ','
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}
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return n;
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}
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float ExUtilGetFloat(const char* const v, int* const error) {
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char* end = NULL;
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const float f = (v != NULL) ? (float)strtod(v, &end) : 0.f;
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if (end == v && error != NULL && !*error) {
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*error = 1;
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fprintf(stderr, "Error! '%s' is not a floating point number.\n",
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(v != NULL) ? v : "(null)");
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}
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return f;
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}
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//------------------------------------------------------------------------------
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static void ResetCommandLineArguments(int argc, const char* argv[],
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CommandLineArguments* const args) {
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assert(args != NULL);
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args->argc_ = argc;
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args->argv_ = argv;
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args->own_argv_ = 0;
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WebPDataInit(&args->argv_data_);
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}
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void ExUtilDeleteCommandLineArguments(CommandLineArguments* const args) {
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if (args != NULL) {
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if (args->own_argv_) {
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WebPFree((void*)args->argv_);
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WebPDataClear(&args->argv_data_);
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}
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ResetCommandLineArguments(0, NULL, args);
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}
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}
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#define MAX_ARGC 16384
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int ExUtilInitCommandLineArguments(int argc, const char* argv[],
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CommandLineArguments* const args) {
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if (args == NULL || argv == NULL) return 0;
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ResetCommandLineArguments(argc, argv, args);
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if (argc == 1 && argv[0][0] != '-') {
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char* cur;
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const char sep[] = " \t\r\n\f\v";
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#if defined(_WIN32) && defined(_UNICODE)
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fprintf(stderr,
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"Error: Reading arguments from a file is a feature unavailable "
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"with Unicode binaries.\n");
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return 0;
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#endif
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if (!ExUtilReadFileToWebPData(argv[0], &args->argv_data_)) {
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return 0;
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}
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args->own_argv_ = 1;
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args->argv_ = (const char**)WebPMalloc(MAX_ARGC * sizeof(*args->argv_));
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if (args->argv_ == NULL) {
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ExUtilDeleteCommandLineArguments(args);
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return 0;
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}
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argc = 0;
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for (cur = strtok((char*)args->argv_data_.bytes, sep);
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cur != NULL;
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cur = strtok(NULL, sep)) {
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if (argc == MAX_ARGC) {
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fprintf(stderr, "ERROR: Arguments limit %d reached\n", MAX_ARGC);
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ExUtilDeleteCommandLineArguments(args);
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return 0;
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}
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assert(strlen(cur) != 0);
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args->argv_[argc++] = cur;
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}
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args->argc_ = argc;
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}
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return 1;
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}
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//------------------------------------------------------------------------------
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int ExUtilReadFileToWebPData(const char* const filename,
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WebPData* const webp_data) {
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const uint8_t* data;
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size_t size;
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if (webp_data == NULL) return 0;
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if (!ImgIoUtilReadFile(filename, &data, &size)) return 0;
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webp_data->bytes = data;
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webp_data->size = size;
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return 1;
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}
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