diff options
Diffstat (limited to 'extern/draco/dracoenc/src/draco/io/parser_utils.cc')
| -rw-r--r-- | extern/draco/dracoenc/src/draco/io/parser_utils.cc | 232 |
1 files changed, 0 insertions, 232 deletions
diff --git a/extern/draco/dracoenc/src/draco/io/parser_utils.cc b/extern/draco/dracoenc/src/draco/io/parser_utils.cc deleted file mode 100644 index 0a22ba114ab..00000000000 --- a/extern/draco/dracoenc/src/draco/io/parser_utils.cc +++ /dev/null @@ -1,232 +0,0 @@ -// Copyright 2016 The Draco Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. -// -#include "draco/io/parser_utils.h" - -#include <algorithm> -#include <cctype> -#include <cmath> -#include <iterator> - -namespace draco { -namespace parser { - -void SkipCharacters(DecoderBuffer *buffer, const char *skip_chars) { - if (skip_chars == nullptr) - return; - const int num_skip_chars = static_cast<int>(strlen(skip_chars)); - char c; - while (buffer->Peek(&c)) { - // Check all characters in the pattern. - bool skip = false; - for (int i = 0; i < num_skip_chars; ++i) { - if (c == skip_chars[i]) { - skip = true; - break; - } - } - if (!skip) - return; - buffer->Advance(1); - } -} - -void SkipWhitespace(DecoderBuffer *buffer) { - bool end_reached = false; - while (PeekWhitespace(buffer, &end_reached) && !end_reached) { - // Skip the whitespace character - buffer->Advance(1); - } -} - -bool PeekWhitespace(DecoderBuffer *buffer, bool *end_reached) { - uint8_t c; - if (!buffer->Peek(&c)) { - *end_reached = true; - return false; // eof reached. - } - if (!isspace(c)) - return false; // Non-whitespace character reached. - return true; -} - -void SkipLine(DecoderBuffer *buffer) { - char c; - while (buffer->Peek(&c)) { - // Skip the character. - buffer->Advance(1); - if (c == '\n') - return; // Return at the end of line - } -} - -bool ParseFloat(DecoderBuffer *buffer, float *value) { - // Read optional sign. - char ch; - if (!buffer->Peek(&ch)) - return false; - int sign = GetSignValue(ch); - if (sign != 0) { - buffer->Advance(1); - } else { - sign = 1; - } - - // Parse integer component. - bool have_digits = false; - double v = 0.0; - while (buffer->Peek(&ch) && ch >= '0' && ch <= '9') { - v *= 10.0; - v += (ch - '0'); - buffer->Advance(1); - have_digits = true; - } - if (ch == '.') { - // Parse fractional component. - buffer->Advance(1); - double fraction = 1.0; - while (buffer->Peek(&ch) && ch >= '0' && ch <= '9') { - fraction *= 0.1; - v += (ch - '0') * fraction; - buffer->Advance(1); - have_digits = true; - } - } - - if (!have_digits) { - // Check for special constants (inf, nan, ...). - std::string text; - if (!ParseString(buffer, &text)) - return false; - if (text == "inf" || text == "Inf") { - v = std::numeric_limits<double>::infinity(); - } else if (text == "nan" || text == "NaN") { - v = nan(""); - } else { - // Invalid string. - return false; - } - } else { - // Handle exponent if present. - if (ch == 'e' || ch == 'E') { - buffer->Advance(1); // Skip 'e' marker. - - // Parse integer exponent. - int32_t exponent = 0; - if (!ParseSignedInt(buffer, &exponent)) - return false; - - // Apply exponent scaling to value. - v *= pow(static_cast<double>(10.0), exponent); - } - } - - *value = (sign < 0) ? static_cast<float>(-v) : static_cast<float>(v); - return true; -} - -bool ParseSignedInt(DecoderBuffer *buffer, int32_t *value) { - // Parse any explicit sign and set the appropriate largest magnitude - // value that can be represented without overflow. - char ch; - if (!buffer->Peek(&ch)) - return false; - const int sign = GetSignValue(ch); - if (sign != 0) - buffer->Advance(1); - - // Attempt to parse integer body. - uint32_t v; - if (!ParseUnsignedInt(buffer, &v)) - return false; - *value = (sign < 0) ? -v : v; - return true; -} - -bool ParseUnsignedInt(DecoderBuffer *buffer, uint32_t *value) { - // Parse the number until we run out of digits. - uint32_t v = 0; - char ch; - bool have_digits = false; - while (buffer->Peek(&ch) && ch >= '0' && ch <= '9') { - v *= 10; - v += (ch - '0'); - buffer->Advance(1); - have_digits = true; - } - if (!have_digits) - return false; - *value = v; - return true; -} - -int GetSignValue(char c) { - if (c == '-') - return -1; - if (c == '+') - return 1; - return 0; -} - -bool ParseString(DecoderBuffer *buffer, std::string *out_string) { - out_string->clear(); - SkipWhitespace(buffer); - bool end_reached = false; - while (!PeekWhitespace(buffer, &end_reached) && !end_reached) { - char c; - if (!buffer->Decode(&c)) - return false; - *out_string += c; - } - return true; -} - -void ParseLine(DecoderBuffer *buffer, std::string *out_string) { - out_string->clear(); - char c; - while (buffer->Peek(&c)) { - // Skip the character. - buffer->Advance(1); - if (c == '\n') - return; // Return at the end of line. - if (c == '\r') - continue; // Ignore extra line ending characters. - *out_string += c; - } -} - -DecoderBuffer ParseLineIntoDecoderBuffer(DecoderBuffer *buffer) { - const char *const head = buffer->data_head(); - char c; - while (buffer->Peek(&c)) { - // Skip the character. - buffer->Advance(1); - if (c == '\n') - break; // End of the line reached. - if (c == '\r') - continue; // Ignore extra line ending characters. - } - DecoderBuffer out_buffer; - out_buffer.Init(head, buffer->data_head() - head); - return out_buffer; -} - -std::string ToLower(const std::string &str) { - std::string out; - std::transform(str.begin(), str.end(), std::back_inserter(out), tolower); - return out; -} - -} // namespace parser -} // namespace draco |