Green Sky
67653bbe50
git-subtree-dir: external/libwebp/libwebp git-subtree-split: dd7364c3cefe0f5c0b3c18c3b1887d353f90fc1f
71 lines
2.7 KiB
C
71 lines
2.7 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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#ifndef WEBP_EXAMPLES_EXAMPLE_UTIL_H_
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#define WEBP_EXAMPLES_EXAMPLE_UTIL_H_
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#include "webp/types.h"
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#include "webp/mux_types.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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//------------------------------------------------------------------------------
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// String parsing
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// Parses 'v' using strto(ul|l|d)(). If error is non-NULL, '*error' is set to
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// true on failure while on success it is left unmodified to allow chaining of
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// calls. An error is only printed on the first occurrence.
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uint32_t ExUtilGetUInt(const char* const v, int base, int* const error);
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int ExUtilGetInt(const char* const v, int base, int* const error);
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float ExUtilGetFloat(const char* const v, int* const error);
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// This variant of ExUtilGetInt() will parse multiple integers from a
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// comma-separated list. Up to 'max_output' integers are parsed.
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// The result is placed in the output[] array, and the number of integers
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// actually parsed is returned, or -1 if an error occurred.
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int ExUtilGetInts(const char* v, int base, int max_output, int output[]);
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// Reads a file named 'filename' into a WebPData structure. The content of
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// webp_data is overwritten. Returns false in case of error.
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int ExUtilReadFileToWebPData(const char* const filename,
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WebPData* const webp_data);
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//------------------------------------------------------------------------------
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// Command-line arguments
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typedef struct {
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int argc_;
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const char** argv_;
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WebPData argv_data_;
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int own_argv_;
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} CommandLineArguments;
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// Initializes the structure from the command-line parameters. If there is
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// only one parameter and it does not start with a '-', then it is assumed to
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// be a file name. This file will be read and tokenized into command-line
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// arguments. The content of 'args' is overwritten.
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// Returns false in case of error (memory allocation failure, non
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// existing file, too many arguments, ...).
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int ExUtilInitCommandLineArguments(int argc, const char* argv[],
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CommandLineArguments* const args);
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// Deallocate all memory and reset 'args'.
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void ExUtilDeleteCommandLineArguments(CommandLineArguments* const args);
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif // WEBP_EXAMPLES_EXAMPLE_UTIL_H_
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