Revert of Updating OTS repo from https://github.com/khaledhosny/ots.git

third_party/ots/include/opentype-sanitiser.h

-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef OPENTYPE_SANITISER_H_
-#define OPENTYPE_SANITISER_H_
-
-#if defined(_WIN32)
-#include <stdlib.h>
-typedef signed char int8_t;
-typedef unsigned char uint8_t;
-typedef short int16_t;
-typedef unsigned short uint16_t;
-typedef int int32_t;
-typedef unsigned int uint32_t;
-typedef __int64 int64_t;
-typedef unsigned __int64 uint64_t;
-#define ntohl(x) _byteswap_ulong (x)
-#define ntohs(x) _byteswap_ushort (x)
-#define htonl(x) _byteswap_ulong (x)
-#define htons(x) _byteswap_ushort (x)
-#else
-#include <arpa/inet.h>
-#include <stdint.h>
-#endif
-
-#include <algorithm>
-#include <cassert>
-#include <cstddef>
-#include <cstring>
-
-namespace ots {
-
-// -----------------------------------------------------------------------------
-// This is an interface for an abstract stream class which is used for writing
-// the serialised results out.
-// -----------------------------------------------------------------------------
-class OTSStream {
- public:
-  OTSStream() {
-    ResetChecksum();
-  }
-
-  virtual ~OTSStream() {}
-
-  // This should be implemented to perform the actual write.
-  virtual bool WriteRaw(const void *data, size_t length) = 0;
-
-  bool Write(const void *data, size_t length) {
-    if (!length) return false;
-
-    const size_t orig_length = length;
-    size_t offset = 0;
-    if (chksum_buffer_offset_) {
-      const size_t l =
-        std::min(length, static_cast<size_t>(4) - chksum_buffer_offset_);
-      std::memcpy(chksum_buffer_ + chksum_buffer_offset_, data, l);
-      chksum_buffer_offset_ += l;
-      offset += l;
-      length -= l;
-    }
-
-    if (chksum_buffer_offset_ == 4) {
-      uint32_t tmp;
-      std::memcpy(&tmp, chksum_buffer_, 4);
-      chksum_ += ntohl(tmp);
-      chksum_buffer_offset_ = 0;
-    }
-
-    while (length >= 4) {
-      uint32_t tmp;
-      std::memcpy(&tmp, reinterpret_cast<const uint8_t *>(data) + offset,
-        sizeof(uint32_t));
-      chksum_ += ntohl(tmp);
-      length -= 4;
-      offset += 4;
-    }
-
-    if (length) {
-      if (chksum_buffer_offset_ != 0) return false;  // not reached
-      if (length > 4) return false;  // not reached
-      std::memcpy(chksum_buffer_,
-             reinterpret_cast<const uint8_t*>(data) + offset, length);
-      chksum_buffer_offset_ = length;
-    }
-
-    return WriteRaw(data, orig_length);
-  }
-
-  virtual bool Seek(off_t position) = 0;
-  virtual off_t Tell() const = 0;
-
-  virtual bool Pad(size_t bytes) {
-    static const uint32_t kZero = 0;
-    while (bytes >= 4) {
-      if (!WriteTag(kZero)) return false;
-      bytes -= 4;
-    }
-    while (bytes) {
-      static const uint8_t kZerob = 0;
-      if (!Write(&kZerob, 1)) return false;
-      bytes--;
-    }
-    return true;
-  }
-
-  bool WriteU8(uint8_t v) {
-    return Write(&v, sizeof(v));
-  }
-
-  bool WriteU16(uint16_t v) {
-    v = htons(v);
-    return Write(&v, sizeof(v));
-  }
-
-  bool WriteS16(int16_t v) {
-    v = htons(v);
-    return Write(&v, sizeof(v));
-  }
-
-  bool WriteU24(uint32_t v) {
-    v = htonl(v);
-    return Write(reinterpret_cast<uint8_t*>(&v)+1, 3);
-  }
-
-  bool WriteU32(uint32_t v) {
-    v = htonl(v);
-    return Write(&v, sizeof(v));
-  }
-
-  bool WriteS32(int32_t v) {
-    v = htonl(v);
-    return Write(&v, sizeof(v));
-  }
-
-  bool WriteR64(uint64_t v) {
-    return Write(&v, sizeof(v));
-  }
-
-  bool WriteTag(uint32_t v) {
-    return Write(&v, sizeof(v));
-  }
-
-  void ResetChecksum() {
-    chksum_ = 0;
-    chksum_buffer_offset_ = 0;
-  }
-
-  uint32_t chksum() const {
-    assert(chksum_buffer_offset_ == 0);
-    return chksum_;
-  }
-
-  struct ChecksumState {
-    uint32_t chksum;
-    uint8_t chksum_buffer[4];
-    unsigned chksum_buffer_offset;
-  };
-
-  ChecksumState SaveChecksumState() const {
-    ChecksumState s;
-    s.chksum = chksum_;
-    s.chksum_buffer_offset = chksum_buffer_offset_;
-    std::memcpy(s.chksum_buffer, chksum_buffer_, 4);
-
-    return s;
-  }
-
-  void RestoreChecksum(const ChecksumState &s) {
-    assert(chksum_buffer_offset_ == 0);
-    chksum_ += s.chksum;
-    chksum_buffer_offset_ = s.chksum_buffer_offset;
-    std::memcpy(chksum_buffer_, s.chksum_buffer, 4);
-  }
-
- protected:
-  uint32_t chksum_;
-  uint8_t chksum_buffer_[4];
-  unsigned chksum_buffer_offset_;
-};
-
-#ifdef __GCC__
-#define MSGFUNC_FMT_ATTR __attribute__((format(printf, 2, 3)))
-#else
-#define MSGFUNC_FMT_ATTR
-#endif
-
-enum TableAction {
-  TABLE_ACTION_DEFAULT,  // Use OTS's default action for that table
-  TABLE_ACTION_SANITIZE, // Sanitize the table, potentially droping it
-  TABLE_ACTION_PASSTHRU, // Serialize the table unchanged
-  TABLE_ACTION_DROP      // Drop the table
-};
-
-class OTSContext {
-  public:
-    OTSContext() {}
-    virtual ~OTSContext() {}
-
-    // Process a given OpenType file and write out a sanitised version
-    //   output: a pointer to an object implementing the OTSStream interface. The
-    //     sanitisied output will be written to this. In the even of a failure,
-    //     partial output may have been written.
-    //   input: the OpenType file
-    //   length: the size, in bytes, of |input|
-    //   context: optional context that holds various OTS settings like user callbacks
-    bool Process(OTSStream *output, const uint8_t *input, size_t length);
-
-    // This function will be called when OTS is reporting an error.
-    //   level: the severity of the generated message:
-    //     0: error messages in case OTS fails to sanitize the font.
-    //     1: warning messages about issue OTS fixed in the sanitized font.
-    virtual void Message(int level, const char *format, ...) MSGFUNC_FMT_ATTR {}
-
-    // This function will be called when OTS needs to decide what to do for a
-    // font table.
-    //   tag: table tag as an integer in big-endian byte order, independent of
-    //   platform endianness
-    virtual TableAction GetTableAction(uint32_t tag) { return ots::TABLE_ACTION_DEFAULT; }
-};
-
-// For backward compatibility - remove once Chrome switches over to the new API.
-bool Process(OTSStream *output, const uint8_t *input, size_t length);
-
-// For backward compatibility - remove once https://codereview.chromium.org/774253008/
-// is submitted.
-void EnableWOFF2();
-
-}  // namespace ots
-
-#endif  // OPENTYPE_SANITISER_H_