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This commit is contained in:
459
tools/preproc/c_file.cpp
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459
tools/preproc/c_file.cpp
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@ -0,0 +1,459 @@
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// Copyright(c) 2016 YamaArashi
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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#include <cstdio>
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#include <cstdarg>
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#include <stdexcept>
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#include <string>
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#include <memory>
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#include <cstring>
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#include <cerrno>
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#include "preproc.h"
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#include "c_file.h"
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#include "char_util.h"
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#include "utf8.h"
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#include "string_parser.h"
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CFile::CFile(const char * filenameCStr, bool isStdin)
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{
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FILE *fp;
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if (isStdin) {
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fp = stdin;
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m_filename = std::string{"<stdin>/"}.append(filenameCStr);
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} else {
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fp = std::fopen(filenameCStr, "rb");
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m_filename = std::string(filenameCStr);
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}
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std::string& filename = m_filename;
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if (fp == NULL)
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FATAL_ERROR("Failed to open \"%s\" for reading.\n", filename.c_str());
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m_size = 0;
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m_buffer = (char *)malloc(CHUNK_SIZE + 1);
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if (m_buffer == NULL) {
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FATAL_ERROR("Failed to allocate memory to process file \"%s\"!", filename.c_str());
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}
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std::size_t numAllocatedBytes = CHUNK_SIZE + 1;
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std::size_t bufferOffset = 0;
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std::size_t count;
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while ((count = std::fread(m_buffer + bufferOffset, 1, CHUNK_SIZE, fp)) != 0) {
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if (!std::ferror(fp)) {
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m_size += count;
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if (std::feof(fp)) {
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break;
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}
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numAllocatedBytes += CHUNK_SIZE;
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bufferOffset += CHUNK_SIZE;
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m_buffer = (char *)realloc(m_buffer, numAllocatedBytes);
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if (m_buffer == NULL) {
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FATAL_ERROR("Failed to allocate memory to process file \"%s\"!", filename.c_str());
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}
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} else {
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FATAL_ERROR("Failed to read \"%s\". (error: %s)", filename.c_str(), std::strerror(errno));
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}
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}
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m_buffer[m_size] = 0;
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std::fclose(fp);
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m_pos = 0;
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m_lineNum = 1;
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m_isStdin = isStdin;
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}
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CFile::CFile(CFile&& other) : m_filename(std::move(other.m_filename))
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{
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m_buffer = other.m_buffer;
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m_pos = other.m_pos;
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m_size = other.m_size;
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m_lineNum = other.m_lineNum;
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m_isStdin = other.m_isStdin;
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other.m_buffer = NULL;
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}
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CFile::~CFile()
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{
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free(m_buffer);
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}
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void CFile::Preproc()
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{
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char stringChar = 0;
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while (m_pos < m_size)
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{
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if (stringChar)
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{
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if (m_buffer[m_pos] == stringChar)
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{
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std::putchar(stringChar);
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m_pos++;
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stringChar = 0;
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}
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else if (m_buffer[m_pos] == '\\' && m_buffer[m_pos + 1] == stringChar)
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{
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std::putchar('\\');
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std::putchar(stringChar);
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m_pos += 2;
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}
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else
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{
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if (m_buffer[m_pos] == '\n')
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m_lineNum++;
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std::putchar(m_buffer[m_pos]);
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m_pos++;
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}
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}
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else
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{
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TryConvertString();
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TryConvertIncbin();
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if (m_pos >= m_size)
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break;
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char c = m_buffer[m_pos++];
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std::putchar(c);
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if (c == '\n')
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m_lineNum++;
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else if (c == '"')
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stringChar = '"';
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else if (c == '\'')
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stringChar = '\'';
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}
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}
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}
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bool CFile::ConsumeHorizontalWhitespace()
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{
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if (m_buffer[m_pos] == '\t' || m_buffer[m_pos] == ' ')
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{
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m_pos++;
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return true;
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}
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return false;
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}
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bool CFile::ConsumeNewline()
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{
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if (m_buffer[m_pos] == '\r' && m_buffer[m_pos + 1] == '\n')
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{
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m_pos += 2;
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m_lineNum++;
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std::putchar('\n');
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return true;
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}
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if (m_buffer[m_pos] == '\n')
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{
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m_pos++;
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m_lineNum++;
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std::putchar('\n');
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return true;
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}
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return false;
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}
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void CFile::SkipWhitespace()
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{
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while (ConsumeHorizontalWhitespace() || ConsumeNewline())
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;
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}
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void CFile::TryConvertString()
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{
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long oldPos = m_pos;
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long oldLineNum = m_lineNum;
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bool noTerminator = false;
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if (m_buffer[m_pos] != '_' || (m_pos > 0 && IsIdentifierChar(m_buffer[m_pos - 1])))
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return;
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m_pos++;
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if (m_buffer[m_pos] == '_')
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{
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noTerminator = true;
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m_pos++;
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}
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SkipWhitespace();
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if (m_buffer[m_pos] != '(')
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{
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m_pos = oldPos;
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m_lineNum = oldLineNum;
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return;
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}
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m_pos++;
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SkipWhitespace();
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std::printf("{ ");
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while (1)
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{
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SkipWhitespace();
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if (m_buffer[m_pos] == '"')
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{
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unsigned char s[kMaxStringLength];
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int length;
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StringParser stringParser(m_buffer, m_size);
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try
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{
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m_pos += stringParser.ParseString(m_pos, s, length);
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}
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catch (std::runtime_error& e)
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{
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RaiseError(e.what());
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}
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for (int i = 0; i < length; i++)
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printf("0x%02X, ", s[i]);
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}
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else if (m_buffer[m_pos] == ')')
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{
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m_pos++;
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break;
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}
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else
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{
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if (m_pos >= m_size)
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RaiseError("unexpected EOF");
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if (IsAsciiPrintable(m_buffer[m_pos]))
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RaiseError("unexpected character '%c'", m_buffer[m_pos]);
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else
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RaiseError("unexpected character '\\x%02X'", m_buffer[m_pos]);
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}
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}
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if (noTerminator)
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std::printf(" }");
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else
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std::printf("0xFF }");
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}
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bool CFile::CheckIdentifier(const std::string& ident)
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{
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unsigned int i;
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for (i = 0; i < ident.length() && m_pos + i < (unsigned)m_size; i++)
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if (ident[i] != m_buffer[m_pos + i])
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return false;
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return (i == ident.length());
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}
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std::unique_ptr<unsigned char[]> CFile::ReadWholeFile(const std::string& path, int& size)
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{
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FILE* fp = std::fopen(path.c_str(), "rb");
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if (fp == nullptr)
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RaiseError("Failed to open \"%s\" for reading.\n", path.c_str());
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std::fseek(fp, 0, SEEK_END);
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size = std::ftell(fp);
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std::unique_ptr<unsigned char[]> buffer = std::unique_ptr<unsigned char[]>(new unsigned char[size]);
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std::rewind(fp);
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if (std::fread(buffer.get(), size, 1, fp) != 1)
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RaiseError("Failed to read \"%s\".\n", path.c_str());
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std::fclose(fp);
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return buffer;
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}
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int ExtractData(const std::unique_ptr<unsigned char[]>& buffer, int offset, int size)
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{
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switch (size)
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{
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case 1:
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return buffer[offset];
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case 2:
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return (buffer[offset + 1] << 8)
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| buffer[offset];
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case 4:
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return (buffer[offset + 3] << 24)
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| (buffer[offset + 2] << 16)
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| (buffer[offset + 1] << 8)
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| buffer[offset];
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default:
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FATAL_ERROR("Invalid size passed to ExtractData.\n");
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}
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}
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void CFile::TryConvertIncbin()
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{
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std::string idents[6] = { "INCBIN_S8", "INCBIN_U8", "INCBIN_S16", "INCBIN_U16", "INCBIN_S32", "INCBIN_U32" };
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int incbinType = -1;
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for (int i = 0; i < 6; i++)
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{
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if (CheckIdentifier(idents[i]))
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{
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incbinType = i;
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break;
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}
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}
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if (incbinType == -1)
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return;
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int size = 1 << (incbinType / 2);
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bool isSigned = ((incbinType % 2) == 0);
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long oldPos = m_pos;
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long oldLineNum = m_lineNum;
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m_pos += idents[incbinType].length();
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SkipWhitespace();
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if (m_buffer[m_pos] != '(')
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{
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m_pos = oldPos;
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m_lineNum = oldLineNum;
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return;
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}
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m_pos++;
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std::printf("{");
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while (true)
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{
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SkipWhitespace();
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if (m_buffer[m_pos] != '"')
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RaiseError("expected double quote");
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m_pos++;
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int startPos = m_pos;
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while (m_buffer[m_pos] != '"')
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{
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if (m_buffer[m_pos] == 0)
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{
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if (m_pos >= m_size)
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RaiseError("unexpected EOF in path string");
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else
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RaiseError("unexpected null character in path string");
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}
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if (m_buffer[m_pos] == '\r' || m_buffer[m_pos] == '\n')
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RaiseError("unexpected end of line character in path string");
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if (m_buffer[m_pos] == '\\')
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RaiseError("unexpected escape in path string");
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m_pos++;
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}
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std::string path(&m_buffer[startPos], m_pos - startPos);
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m_pos++;
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int fileSize;
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std::unique_ptr<unsigned char[]> buffer = ReadWholeFile(path, fileSize);
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if ((fileSize % size) != 0)
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RaiseError("Size %d doesn't evenly divide file size %d.\n", size, fileSize);
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int count = fileSize / size;
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int offset = 0;
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for (int i = 0; i < count; i++)
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{
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int data = ExtractData(buffer, offset, size);
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offset += size;
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if (isSigned)
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std::printf("%d,", data);
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else
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std::printf("%uu,", data);
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}
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SkipWhitespace();
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if (m_buffer[m_pos] != ',')
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break;
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m_pos++;
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}
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if (m_buffer[m_pos] != ')')
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RaiseError("expected ')'");
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m_pos++;
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std::printf("}");
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}
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// Reports a diagnostic message.
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void CFile::ReportDiagnostic(const char* type, const char* format, std::va_list args)
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{
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const int bufferSize = 1024;
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char buffer[bufferSize];
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std::vsnprintf(buffer, bufferSize, format, args);
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std::fprintf(stderr, "%s:%ld: %s: %s\n", m_filename.c_str(), m_lineNum, type, buffer);
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}
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#define DO_REPORT(type) \
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do \
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{ \
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std::va_list args; \
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va_start(args, format); \
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ReportDiagnostic(type, format, args); \
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va_end(args); \
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} while (0)
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// Reports an error diagnostic and terminates the program.
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void CFile::RaiseError(const char* format, ...)
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{
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DO_REPORT("error");
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std::exit(1);
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}
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// Reports a warning diagnostic.
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void CFile::RaiseWarning(const char* format, ...)
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{
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DO_REPORT("warning");
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}
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Block a user