chromium/third_party/libwebp/src/imageio/pnmdec.c

// Copyright 2017 Google Inc. All Rights Reserved.
//
// Use of this source code is governed by a BSD-style license
// that can be found in the COPYING file in the root of the source
// tree. An additional intellectual property rights grant can be found
// in the file PATENTS. All contributing project authors may
// be found in the AUTHORS file in the root of the source tree.
// -----------------------------------------------------------------------------
//
// (limited) PNM decoder

#include "./pnmdec.h"

#include <assert.h>
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "webp/encode.h"
#include "./imageio_util.h"

#if defined(_MSC_VER) && _MSC_VER < 1900
#define snprintf …
#endif

PNMFlags;

PNMInfo;

// -----------------------------------------------------------------------------
// PNM decoding

#define MAX_LINE_SIZE …
static const size_t kMinPNMHeaderSize = …;

static size_t ReadLine(const uint8_t* const data, size_t off, size_t data_size,
                       char out[MAX_LINE_SIZE + 1], size_t* const out_size) { … }

static size_t FlagError(const char flag[]) { … }

// inspired from http://netpbm.sourceforge.net/doc/pam.html
static size_t ReadPAMFields(PNMInfo* const info, size_t off) { … }

static size_t ReadHeader(PNMInfo* const info) { … }

int ReadPNM(const uint8_t* const data, size_t data_size,
            WebPPicture* const pic, int keep_alpha,
            struct Metadata* const metadata) { … }

// -----------------------------------------------------------------------------