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

third_party/ots/src/ots.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 OTS_H_
-#define OTS_H_
-
-#include <stddef.h>
-#include <cstdarg>
-#include <cstddef>
-#include <cstdio>
-#include <cstdlib>
-#include <cstring>
-#include <limits>
-
-#include "opentype-sanitiser.h"
-
-// arraysize borrowed from base/basictypes.h
-template <typename T, size_t N>
-char (&ArraySizeHelper(T (&array)[N]))[N];
-#define arraysize(array) (sizeof(ArraySizeHelper(array)))
-
-namespace ots {
-
-#if !defined(OTS_DEBUG)
-#define OTS_FAILURE() false
-#else
-#define OTS_FAILURE() \
-  (\
-    std::fprintf(stderr, "ERROR at %s:%d (%s)\n", \
-                 __FILE__, __LINE__, __FUNCTION__) \
-    && false\
-  )
-#endif
-
-// All OTS_FAILURE_* macros ultimately evaluate to 'false', just like the original
-// message-less OTS_FAILURE(), so that the current parser will return 'false' as
-// its result (indicating a failure).
-
-#if !defined(OTS_DEBUG)
-#define OTS_MESSAGE_(level,otf_,...) \
-  (otf_)->context->Message(level,__VA_ARGS__)
-#else
-#define OTS_MESSAGE_(level,otf_,...) \
-  OTS_FAILURE(), \
-  (otf_)->context->Message(level,__VA_ARGS__)
-#endif
-
-// Generate a simple message
-#define OTS_FAILURE_MSG_(otf_,...) \
-  (OTS_MESSAGE_(0,otf_,__VA_ARGS__), false)
-
-#define OTS_WARNING_MSG_(otf_,...) \
-  OTS_MESSAGE_(1,otf_,__VA_ARGS__)
-
-// Generate a message with an associated table tag
-#define OTS_FAILURE_MSG_TAG_(otf_,msg_,tag_) \
-  (OTS_MESSAGE_(0,otf_,"%4.4s: %s", tag_, msg_), false)
-
-// Convenience macros for use in files that only handle a single table tag,
-// defined as TABLE_NAME at the top of the file; the 'file' variable is
-// expected to be the current OpenTypeFile pointer.
-#define OTS_FAILURE_MSG(...) OTS_FAILURE_MSG_(file, TABLE_NAME ": " __VA_ARGS__)
-
-#define OTS_WARNING(...) OTS_WARNING_MSG_(file, TABLE_NAME ": " __VA_ARGS__)
-
-// -----------------------------------------------------------------------------
-// Buffer helper class
-//
-// This class perform some trival buffer operations while checking for
-// out-of-bounds errors. As a family they return false if anything is amiss,
-// updating the current offset otherwise.
-// -----------------------------------------------------------------------------
-class Buffer {
- public:
-  Buffer(const uint8_t *buf, size_t len)
-      : buffer_(buf),
-        length_(len),
-        offset_(0) { }
-
-  bool Skip(size_t n_bytes) {
-    return Read(NULL, n_bytes);
-  }
-
-  bool Read(uint8_t *buf, size_t n_bytes) {
-    if (n_bytes > 1024 * 1024 * 1024) {
-      return OTS_FAILURE();
-    }
-    if ((offset_ + n_bytes > length_) ||
-        (offset_ > length_ - n_bytes)) {
-      return OTS_FAILURE();
-    }
-    if (buf) {
-      std::memcpy(buf, buffer_ + offset_, n_bytes);
-    }
-    offset_ += n_bytes;
-    return true;
-  }
-
-  inline bool ReadU8(uint8_t *value) {
-    if (offset_ + 1 > length_) {
-      return OTS_FAILURE();
-    }
-    *value = buffer_[offset_];
-    ++offset_;
-    return true;
-  }
-
-  bool ReadU16(uint16_t *value) {
-    if (offset_ + 2 > length_) {
-      return OTS_FAILURE();
-    }
-    std::memcpy(value, buffer_ + offset_, sizeof(uint16_t));
-    *value = ntohs(*value);
-    offset_ += 2;
-    return true;
-  }
-
-  bool ReadS16(int16_t *value) {
-    return ReadU16(reinterpret_cast<uint16_t*>(value));
-  }
-
-  bool ReadU24(uint32_t *value) {
-    if (offset_ + 3 > length_) {
-      return OTS_FAILURE();
-    }
-    *value = static_cast<uint32_t>(buffer_[offset_]) << 16 |
-        static_cast<uint32_t>(buffer_[offset_ + 1]) << 8 |
-        static_cast<uint32_t>(buffer_[offset_ + 2]);
-    offset_ += 3;
-    return true;
-  }
-
-  bool ReadU32(uint32_t *value) {
-    if (offset_ + 4 > length_) {
-      return OTS_FAILURE();
-    }
-    std::memcpy(value, buffer_ + offset_, sizeof(uint32_t));
-    *value = ntohl(*value);
-    offset_ += 4;
-    return true;
-  }
-
-  bool ReadS32(int32_t *value) {
-    return ReadU32(reinterpret_cast<uint32_t*>(value));
-  }
-
-  bool ReadTag(uint32_t *value) {
-    if (offset_ + 4 > length_) {
-      return OTS_FAILURE();
-    }
-    std::memcpy(value, buffer_ + offset_, sizeof(uint32_t));
-    offset_ += 4;
-    return true;
-  }
-
-  bool ReadR64(uint64_t *value) {
-    if (offset_ + 8 > length_) {
-      return OTS_FAILURE();
-    }
-    std::memcpy(value, buffer_ + offset_, sizeof(uint64_t));
-    offset_ += 8;
-    return true;
-  }
-
-  const uint8_t *buffer() const { return buffer_; }
-  size_t offset() const { return offset_; }
-  size_t length() const { return length_; }
-
-  void set_offset(size_t newoffset) { offset_ = newoffset; }
-
- private:
-  const uint8_t * const buffer_;
-  const size_t length_;
-  size_t offset_;
-};
-
-// Round a value up to the nearest multiple of 4. Don't round the value in the
-// case that rounding up overflows.
-template<typename T> T Round4(T value) {
-  if (std::numeric_limits<T>::max() - value < 3) {
-    return value;
-  }
-  return (value + 3) & ~3;
-}
-
-template<typename T> T Round2(T value) {
-  if (value == std::numeric_limits<T>::max()) {
-    return value;
-  }
-  return (value + 1) & ~1;
-}
-
-bool IsValidVersionTag(uint32_t tag);
-
-#define FOR_EACH_TABLE_TYPE \
-  F(cff, CFF) \
-  F(cmap, CMAP) \
-  F(cvt, CVT) \
-  F(fpgm, FPGM) \
-  F(gasp, GASP) \
-  F(gdef, GDEF) \
-  F(glyf, GLYF) \
-  F(gpos, GPOS) \
-  F(gsub, GSUB) \
-  F(hdmx, HDMX) \
-  F(head, HEAD) \
-  F(hhea, HHEA) \
-  F(hmtx, HMTX) \
-  F(kern, KERN) \
-  F(loca, LOCA) \
-  F(ltsh, LTSH) \
-  F(math, MATH) \
-  F(maxp, MAXP) \
-  F(name, NAME) \
-  F(os2, OS2) \
-  F(post, POST) \
-  F(prep, PREP) \
-  F(vdmx, VDMX) \
-  F(vorg, VORG) \
-  F(vhea, VHEA) \
-  F(vmtx, VMTX)
-
-#define F(name, capname) struct OpenType##capname;
-FOR_EACH_TABLE_TYPE
-#undef F
-
-struct OpenTypeFile {
-  OpenTypeFile() {
-#define F(name, capname) name = NULL;
-    FOR_EACH_TABLE_TYPE
-#undef F
-  }
-
-  uint32_t version;
-  uint16_t num_tables;
-  uint16_t search_range;
-  uint16_t entry_selector;
-  uint16_t range_shift;
-
-  OTSContext *context;
-
-#define F(name, capname) OpenType##capname *name;
-FOR_EACH_TABLE_TYPE
-#undef F
-};
-
-#define F(name, capname) \
-bool ots_##name##_parse(OpenTypeFile *f, const uint8_t *d, size_t l); \
-bool ots_##name##_should_serialise(OpenTypeFile *f); \
-bool ots_##name##_serialise(OTSStream *s, OpenTypeFile *f); \
-void ots_##name##_free(OpenTypeFile *f);
-// TODO(yusukes): change these function names to follow Chromium coding rule.
-FOR_EACH_TABLE_TYPE
-#undef F
-
-}  // namespace ots
-
-#endif  // OTS_H_