tumbledemerald-legacy/tools/scaninc/c_file.cpp

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2022-05-19 19:14:13 +02:00
// 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);
}