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Diffstat (limited to 'tools/preproc/c_file.cpp')
| -rw-r--r-- | tools/preproc/c_file.cpp | 429 |
1 files changed, 429 insertions, 0 deletions
diff --git a/tools/preproc/c_file.cpp b/tools/preproc/c_file.cpp new file mode 100644 index 0000000..229f568 --- /dev/null +++ b/tools/preproc/c_file.cpp @@ -0,0 +1,429 @@ +// Copyright(c) 2016 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 <cstdio> +#include <cstdarg> +#include <string> +#include <memory> +#include "preproc.h" +#include "c_file.h" +#include "char_util.h" +#include "utf8.h" +#include "string_parser.h" + +CFile::CFile(std::string filename) : m_filename(filename) +{ + FILE *fp = std::fopen(filename.c_str(), "rb"); + + if (fp == NULL) + FATAL_ERROR("Failed to open \"%s\" for reading.\n", filename.c_str()); + + std::fseek(fp, 0, SEEK_END); + + m_size = std::ftell(fp); + + if (m_size < 0) + FATAL_ERROR("File size of \"%s\" is less than zero.\n", filename.c_str()); + + m_buffer = new char[m_size + 1]; + + std::rewind(fp); + + if (std::fread(m_buffer, m_size, 1, fp) != 1) + FATAL_ERROR("Failed to read \"%s\".\n", filename.c_str()); + + m_buffer[m_size] = 0; + + std::fclose(fp); + + m_pos = 0; + m_lineNum = 1; +} + +CFile::CFile(CFile&& other) : m_filename(std::move(other.m_filename)) +{ + m_buffer = other.m_buffer; + m_pos = other.m_pos; + m_size = other.m_size; + m_lineNum = other.m_lineNum; + + other.m_buffer = nullptr; +} + +CFile::~CFile() +{ + delete[] m_buffer; +} + +void CFile::Preproc() +{ + char stringChar = 0; + + while (m_pos < m_size) + { + if (stringChar) + { + if (m_buffer[m_pos] == stringChar) + { + std::putchar(stringChar); + m_pos++; + stringChar = 0; + } + else if (m_buffer[m_pos] == '\\' && m_buffer[m_pos + 1] == stringChar) + { + std::putchar('\\'); + std::putchar(stringChar); + m_pos += 2; + } + else + { + if (m_buffer[m_pos] == '\n') + m_lineNum++; + std::putchar(m_buffer[m_pos]); + m_pos++; + } + } + else + { + TryConvertString(); + TryConvertIncbin(); + + if (m_pos >= m_size) + break; + + char c = m_buffer[m_pos++]; + + std::putchar(c); + + if (c == '\n') + m_lineNum++; + else if (c == '"') + stringChar = '"'; + else if (c == '\'') + stringChar = '\''; + } + } +} + +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] == '\r' && m_buffer[m_pos + 1] == '\n') + { + m_pos += 2; + m_lineNum++; + std::putchar('\n'); + return true; + } + + if (m_buffer[m_pos] == '\n') + { + m_pos++; + m_lineNum++; + std::putchar('\n'); + return true; + } + + return false; +} + +void CFile::SkipWhitespace() +{ + while (ConsumeHorizontalWhitespace() || ConsumeNewline()) + ; +} + +void CFile::TryConvertString() +{ + long oldPos = m_pos; + long oldLineNum = m_lineNum; + bool noTerminator = false; + + if (m_buffer[m_pos] != '_' || (m_pos > 0 && IsIdentifierChar(m_buffer[m_pos - 1]))) + return; + + m_pos++; + + if (m_buffer[m_pos] == '_') + { + noTerminator = true; + m_pos++; + } + + SkipWhitespace(); + + if (m_buffer[m_pos] != '(') + { + m_pos = oldPos; + m_lineNum = oldLineNum; + return; + } + + m_pos++; + + SkipWhitespace(); + + std::printf("{ "); + + while (1) + { + SkipWhitespace(); + + if (m_buffer[m_pos] == '"') + { + unsigned char s[kMaxStringLength]; + int length; + StringParser stringParser(m_buffer, m_size); + + try + { + m_pos += stringParser.ParseString(m_pos, s, length); + } + catch (std::runtime_error& e) + { + RaiseError(e.what()); + } + + for (int i = 0; i < length; i++) + printf("0x%02X, ", s[i]); + } + else if (m_buffer[m_pos] == ')') + { + m_pos++; + break; + } + else + { + if (m_pos >= m_size) + RaiseError("unexpected EOF"); + if (IsAsciiPrintable(m_buffer[m_pos])) + RaiseError("unexpected character '%c'", m_buffer[m_pos]); + else + RaiseError("unexpected character '\\x%02X'", m_buffer[m_pos]); + } + } + + if (noTerminator) + std::printf(" }"); + else + std::printf("0xFF }"); +} + +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()); +} + +std::unique_ptr<unsigned char[]> CFile::ReadWholeFile(const std::string& path, int& size) +{ + FILE* fp = std::fopen(path.c_str(), "rb"); + + if (fp == nullptr) + RaiseError("Failed to open \"%s\" for reading.\n", path.c_str()); + + std::fseek(fp, 0, SEEK_END); + + size = std::ftell(fp); + + std::unique_ptr<unsigned char[]> buffer = std::unique_ptr<unsigned char[]>(new unsigned char[size]); + + std::rewind(fp); + + if (std::fread(buffer.get(), size, 1, fp) != 1) + RaiseError("Failed to read \"%s\".\n", path.c_str()); + + std::fclose(fp); + + return buffer; +} + +int ExtractData(const std::unique_ptr<unsigned char[]>& buffer, int offset, int size) +{ + switch (size) + { + case 1: + return buffer[offset]; + case 2: + return (buffer[offset + 1] << 8) + | buffer[offset]; + case 4: + return (buffer[offset + 3] << 24) + | (buffer[offset + 2] << 16) + | (buffer[offset + 1] << 8) + | buffer[offset]; + default: + FATAL_ERROR("Invalid size passed to ExtractData.\n"); + } +} + +void CFile::TryConvertIncbin() +{ + 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; + + int size = 1 << (incbinType / 2); + bool isSigned = ((incbinType % 2) == 0); + + 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++; + + std::printf("{"); + + while (true) + { + SkipWhitespace(); + + if (m_buffer[m_pos] != '"') + RaiseError("expected double quote"); + + m_pos++; + + int startPos = m_pos; + + while (m_buffer[m_pos] != '"') + { + if (m_buffer[m_pos] == 0) + { + if (m_pos >= m_size) + RaiseError("unexpected EOF in path string"); + else + RaiseError("unexpected null character in path string"); + } + + if (m_buffer[m_pos] == '\r' || m_buffer[m_pos] == '\n') + RaiseError("unexpected end of line character in path string"); + + if (m_buffer[m_pos] == '\\') + RaiseError("unexpected escape in path string"); + + m_pos++; + } + + std::string path(&m_buffer[startPos], m_pos - startPos); + + m_pos++; + + int fileSize; + std::unique_ptr<unsigned char[]> buffer = ReadWholeFile(path, fileSize); + + if ((fileSize % size) != 0) + RaiseError("Size %d doesn't evenly divide file size %d.\n", size, fileSize); + + int count = fileSize / size; + int offset = 0; + + for (int i = 0; i < count; i++) + { + int data = ExtractData(buffer, offset, size); + offset += size; + + if (isSigned) + std::printf("%d,", data); + else + std::printf("%uu,", data); + } + + SkipWhitespace(); + + if (m_buffer[m_pos] != ',') + break; + + m_pos++; + } + + if (m_buffer[m_pos] != ')') + RaiseError("expected ')'"); + + m_pos++; + + std::printf("}"); +} + +// Reports a diagnostic message. +void CFile::ReportDiagnostic(const char* type, const char* format, std::va_list args) +{ + const int bufferSize = 1024; + char buffer[bufferSize]; + std::vsnprintf(buffer, bufferSize, format, args); + std::fprintf(stderr, "%s:%ld: %s: %s\n", m_filename.c_str(), m_lineNum, type, buffer); +} + +#define DO_REPORT(type) \ +do \ +{ \ + std::va_list args; \ + va_start(args, format); \ + ReportDiagnostic(type, format, args); \ + va_end(args); \ +} while (0) + +// Reports an error diagnostic and terminates the program. +void CFile::RaiseError(const char* format, ...) +{ + DO_REPORT("error"); + std::exit(1); +} + +// Reports a warning diagnostic. +void CFile::RaiseWarning(const char* format, ...) +{ + DO_REPORT("warning"); +} |