diff options
Diffstat (limited to 'tools/scaninc/c_file.cpp')
| -rw-r--r-- | tools/scaninc/c_file.cpp | 307 |
1 files changed, 307 insertions, 0 deletions
diff --git a/tools/scaninc/c_file.cpp b/tools/scaninc/c_file.cpp new file mode 100644 index 0000000..595f366 --- /dev/null +++ b/tools/scaninc/c_file.cpp @@ -0,0 +1,307 @@ +// Copyright(c) 2017 YamaArashi +// +// Permission is hereby granted, free of charge, to any person obtaining a copy +// of this software and associated documentation files (the "Software"), to deal +// in the Software without restriction, including without limitation the rights +// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +// copies of the Software, and to permit persons to whom the Software is +// furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +// THE SOFTWARE. + +#include "c_file.h" + +CFile::CFile(std::string path) +{ + m_path = path; + + FILE *fp = std::fopen(path.c_str(), "rb"); + + if (fp == NULL) + FATAL_ERROR("Failed to open \"%s\" for reading.\n", path.c_str()); + + std::fseek(fp, 0, SEEK_END); + + m_size = std::ftell(fp); + + m_buffer = new char[m_size + 1]; + m_buffer[m_size] = 0; + + std::rewind(fp); + + if (std::fread(m_buffer, m_size, 1, fp) != 1) + FATAL_ERROR("Failed to read \"%s\".\n", path.c_str()); + + std::fclose(fp); + + m_pos = 0; + m_lineNum = 1; +} + +CFile::~CFile() +{ + delete[] m_buffer; +} + +void CFile::FindIncbins() +{ + char stringChar = 0; + + while (m_pos < m_size) + { + if (stringChar) + { + if (m_buffer[m_pos] == stringChar) + { + m_pos++; + stringChar = 0; + } + else if (m_buffer[m_pos] == '\\' && m_buffer[m_pos + 1] == stringChar) + { + m_pos += 2; + } + else + { + if (m_buffer[m_pos] == '\n') + m_lineNum++; + m_pos++; + } + } + else + { + SkipWhitespace(); + CheckInclude(); + CheckIncbin(); + + if (m_pos >= m_size) + break; + + char c = m_buffer[m_pos++]; + + if (c == '\n') + m_lineNum++; + else if (c == '"') + stringChar = '"'; + else if (c == '\'') + stringChar = '\''; + else if (c == 0) + FATAL_INPUT_ERROR("unexpected null character"); + } + } +} + +bool CFile::ConsumeHorizontalWhitespace() +{ + if (m_buffer[m_pos] == '\t' || m_buffer[m_pos] == ' ') + { + m_pos++; + return true; + } + + return false; +} + +bool CFile::ConsumeNewline() +{ + if (m_buffer[m_pos] == '\n') + { + m_pos++; + m_lineNum++; + return true; + } + + if (m_buffer[m_pos] == '\r' && m_buffer[m_pos + 1] == '\n') + { + m_pos += 2; + m_lineNum++; + return true; + } + + return false; +} + +bool CFile::ConsumeComment() +{ + if (m_buffer[m_pos] == '/' && m_buffer[m_pos + 1] == '*') + { + m_pos += 2; + while (m_buffer[m_pos] != '*' || m_buffer[m_pos + 1] != '/') + { + if (m_buffer[m_pos] == 0) + return false; + if (!ConsumeNewline()) + m_pos++; + } + m_pos += 2; + return true; + } + else if (m_buffer[m_pos] == '/' && m_buffer[m_pos + 1] == '/') + { + m_pos += 2; + while (!ConsumeNewline()) + { + if (m_buffer[m_pos] == 0) + return false; + m_pos++; + } + return true; + } + + return false; +} + +void CFile::SkipWhitespace() +{ + while (ConsumeHorizontalWhitespace() || ConsumeNewline() || ConsumeComment()) + ; +} + +bool CFile::CheckIdentifier(const std::string& ident) +{ + unsigned int i; + + for (i = 0; i < ident.length() && m_pos + i < (unsigned)m_size; i++) + if (ident[i] != m_buffer[m_pos + i]) + return false; + + return (i == ident.length()); +} + +void CFile::CheckInclude() +{ + if (m_buffer[m_pos] != '#') + return; + + std::string ident = "#include"; + + if (!CheckIdentifier(ident)) + { + return; + } + + m_pos += ident.length(); + + ConsumeHorizontalWhitespace(); + + std::string path = ReadPath(); + + if (!path.empty()) { + m_includes.emplace(path); + } +} + +void CFile::CheckIncbin() +{ + // Optimization: assume most lines are not incbins + if (!(m_buffer[m_pos+0] == 'I' + && m_buffer[m_pos+1] == 'N' + && m_buffer[m_pos+2] == 'C' + && m_buffer[m_pos+3] == 'B' + && m_buffer[m_pos+4] == 'I' + && m_buffer[m_pos+5] == 'N' + && m_buffer[m_pos+6] == '_')) + { + return; + } + + std::string idents[6] = { "INCBIN_S8", "INCBIN_U8", "INCBIN_S16", "INCBIN_U16", "INCBIN_S32", "INCBIN_U32" }; + int incbinType = -1; + + for (int i = 0; i < 6; i++) + { + if (CheckIdentifier(idents[i])) + { + incbinType = i; + break; + } + } + + if (incbinType == -1) + return; + + long oldPos = m_pos; + long oldLineNum = m_lineNum; + + m_pos += idents[incbinType].length(); + + SkipWhitespace(); + + if (m_buffer[m_pos] != '(') + { + m_pos = oldPos; + m_lineNum = oldLineNum; + return; + } + + m_pos++; + + while (true) + { + SkipWhitespace(); + + std::string path = ReadPath(); + + SkipWhitespace(); + + m_incbins.emplace(path); + + if (m_buffer[m_pos] != ',') + break; + + m_pos++; + } + + if (m_buffer[m_pos] != ')') + FATAL_INPUT_ERROR("expected ')'"); + + m_pos++; + +} + +std::string CFile::ReadPath() +{ + if (m_buffer[m_pos] != '"') + { + if (m_buffer[m_pos] == '<') + { + return std::string(); + } + FATAL_INPUT_ERROR("expected '\"' or '<'"); + } + + m_pos++; + + int startPos = m_pos; + + while (m_buffer[m_pos] != '"') + { + if (m_buffer[m_pos] == 0) + { + if (m_pos >= m_size) + FATAL_INPUT_ERROR("unexpected EOF in path string"); + else + FATAL_INPUT_ERROR("unexpected null character in path string"); + } + + if (m_buffer[m_pos] == '\r' || m_buffer[m_pos] == '\n') + FATAL_INPUT_ERROR("unexpected end of line character in path string"); + + if (m_buffer[m_pos] == '\\') + FATAL_INPUT_ERROR("unexpected escape in path string"); + + m_pos++; + } + + m_pos++; + + return std::string(m_buffer + startPos, m_pos - 1 - startPos); +} |