tumbledemerald-legacy/tools/preproc/preproc.cpp

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2022-05-19 19:14:13 +02:00
// 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 <string>
#include <stack>
#include "preproc.h"
#include "asm_file.h"
#include "c_file.h"
#include "charmap.h"
Charmap* g_charmap;
void PrintAsmBytes(unsigned char *s, int length)
{
if (length > 0)
{
std::printf("\t.byte ");
for (int i = 0; i < length; i++)
{
std::printf("0x%02X", s[i]);
if (i < length - 1)
std::printf(", ");
}
std::putchar('\n');
}
}
void PreprocAsmFile(std::string filename)
{
std::stack<AsmFile> stack;
stack.push(AsmFile(filename));
for (;;)
{
while (stack.top().IsAtEnd())
{
stack.pop();
if (stack.empty())
return;
else
stack.top().OutputLocation();
}
Directive directive = stack.top().GetDirective();
switch (directive)
{
case Directive::Include:
stack.push(AsmFile(stack.top().ReadPath()));
stack.top().OutputLocation();
break;
case Directive::String:
{
unsigned char s[kMaxStringLength];
int length = stack.top().ReadString(s);
PrintAsmBytes(s, length);
break;
}
case Directive::Braille:
{
unsigned char s[kMaxStringLength];
int length = stack.top().ReadBraille(s);
PrintAsmBytes(s, length);
break;
}
case Directive::Unknown:
{
std::string globalLabel = stack.top().GetGlobalLabel();
if (globalLabel.length() != 0)
{
const char *s = globalLabel.c_str();
std::printf("%s: ; .global %s\n", s, s);
}
else
{
stack.top().OutputLine();
}
break;
}
}
}
}
void PreprocCFile(const char * filename, bool isStdin)
{
CFile cFile(filename, isStdin);
cFile.Preproc();
}
char* GetFileExtension(char* filename)
{
char* extension = filename;
while (*extension != 0)
extension++;
while (extension > filename && *extension != '.')
extension--;
if (extension == filename)
return nullptr;
extension++;
if (*extension == 0)
return nullptr;
return extension;
}
int main(int argc, char **argv)
{
if (argc < 3 || argc > 4)
{
std::fprintf(stderr, "Usage: %s SRC_FILE CHARMAP_FILE [-i]\nwhere -i denotes if input is from stdin\n", argv[0]);
return 1;
}
g_charmap = new Charmap(argv[2]);
char* extension = GetFileExtension(argv[1]);
if (!extension)
FATAL_ERROR("\"%s\" has no file extension.\n", argv[1]);
if ((extension[0] == 's') && extension[1] == 0)
PreprocAsmFile(argv[1]);
else if ((extension[0] == 'c' || extension[0] == 'i') && extension[1] == 0) {
if (argc == 4) {
if (argv[3][0] == '-' && argv[3][1] == 'i' && argv[3][2] == '\0') {
PreprocCFile(argv[1], true);
} else {
FATAL_ERROR("unknown argument flag \"%s\".\n", argv[3]);
}
} else {
PreprocCFile(argv[1], false);
}
} else
FATAL_ERROR("\"%s\" has an unknown file extension of \"%s\".\n", argv[1], extension);
return 0;
}