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Support C-Style enum in preproc (#1984)

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* [preproc] C-style enums

- asm files parseable from stdin
- 2nd preproc pass
- add parser for C-style `enum`
- positional arguments at end of command

---------

Co-authored-by: sbird <sbird@no.tld>
Co-authored-by: Martin Griffin <martinrgriffin@gmail.com>
This commit is contained in:
Philipp AUER
2024-07-13 19:26:33 +02:00
committed by GitHub
parent a0a02f9733
commit 550e6688aa
9 changed files with 339 additions and 103 deletions
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83
tools/preproc/preproc.cpp
View File

@@ -20,11 +20,14 @@
#include <string>
#include <stack>
#include <unistd.h>
#include "preproc.h"
#include "asm_file.h"
#include "c_file.h"
#include "charmap.h"
static void UsageAndExit(const char *program);
Charmap* g_charmap;
void PrintAsmBytes(unsigned char *s, int length)
@@ -43,11 +46,12 @@ void PrintAsmBytes(unsigned char *s, int length)
}
}
void PreprocAsmFile(std::string filename)
void PreprocAsmFile(std::string filename, bool isStdin, bool doEnum)
{
std::stack<AsmFile> stack;
stack.push(AsmFile(filename));
stack.push(AsmFile(filename, isStdin, doEnum));
std::printf("# 1 \"%s\"\n", filename.c_str());
for (;;)
{
@@ -66,7 +70,7 @@ void PreprocAsmFile(std::string filename)
switch (directive)
{
case Directive::Include:
stack.push(AsmFile(stack.top().ReadPath()));
stack.push(AsmFile(stack.top().ReadPath(), false, doEnum));
stack.top().OutputLocation();
break;
case Directive::String:
@@ -83,6 +87,12 @@ void PreprocAsmFile(std::string filename)
PrintAsmBytes(s, length);
break;
}
case Directive::Enum:
{
if (!stack.top().ParseEnum())
stack.top().OutputLine();
break;
}
case Directive::Unknown:
{
std::string globalLabel = stack.top().GetGlobalLabel();
@@ -109,9 +119,9 @@ void PreprocCFile(const char * filename, bool isStdin)
cFile.Preproc();
}
char* GetFileExtension(char* filename)
const char* GetFileExtension(const char* filename)
{
char* extension = filename;
const char* extension = filename;
while (*extension != 0)
extension++;
@@ -130,35 +140,64 @@ char* GetFileExtension(char* filename)
return extension;
}
static void UsageAndExit(const char *program)
{
std::fprintf(stderr, "Usage: %s [-i] [-e] SRC_FILE CHARMAP_FILE\nwhere -i denotes if input is from stdin\n -e enables enum handling\n", program);
std::exit(EXIT_FAILURE);
}
int main(int argc, char **argv)
{
if (argc < 3 || argc > 4)
int opt;
const char *source = NULL;
const char *charmap = NULL;
bool isStdin = false;
bool doEnum = false;
/* preproc [-i] [-e] SRC_FILE CHARMAP_FILE */
while ((opt = getopt(argc, argv, "ie")) != -1)
{
std::fprintf(stderr, "Usage: %s SRC_FILE CHARMAP_FILE [-i]\nwhere -i denotes if input is from stdin\n", argv[0]);
return 1;
switch (opt)
{
case 'i':
isStdin = true;
break;
case 'e':
doEnum = true;
break;
default:
UsageAndExit(argv[0]);
break;
}
}
g_charmap = new Charmap(argv[2]);
if (optind + 2 != argc)
UsageAndExit(argv[0]);
char* extension = GetFileExtension(argv[1]);
source = argv[optind + 0];
charmap = argv[optind + 1];
g_charmap = new Charmap(charmap);
const char* extension = GetFileExtension(source);
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
{
PreprocAsmFile(source, isStdin, doEnum);
}
else if ((extension[0] == 'c' || extension[0] == 'i') && extension[1] == 0)
{
if (doEnum)
FATAL_ERROR("-e is invalid for C sources\n");
PreprocCFile(source, isStdin);
}
else
{
FATAL_ERROR("\"%s\" has an unknown file extension of \"%s\".\n", argv[1], extension);
}
return 0;
}