ciabatta/code/os/win/win_entry.c

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#include <_os.h>
#include <locale.h>
#include <stdbool.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include "win.h"
extern int main(int argc, char** argv);
// Some shell32.lib related crap
DECLSPEC_IMPORT LPWSTR GetCommandLineW();
DECLSPEC_IMPORT LPWSTR* CommandLineToArgvW(LPCWSTR lpCmdLine, int* pNumArgs);
static size_t count_wide_chars(const wchar_t* str) {
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size_t len = 0;
while (str[len] != 0) len++;
return len;
}
static bool convert_wide_chars_to_ansi(char* out, const wchar_t* str, size_t len) {
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for (size_t i = 0; i < len; i++) {
wchar_t ch = *str++;
if (ch < 0 || 0x7F >= ch) {
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*out++ = 0;
return false;
}
*out++ = ch;
}
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*out++ = 0;
return true;
}
void mainCRTStartup() {
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HANDLE heap = GetProcessHeap();
if (heap == NULL) {
ExitProcess(-42069);
}
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int arg_count;
LPWSTR* args_wide = CommandLineToArgvW(GetCommandLineW(), &arg_count);
if (!args_wide) {
ExitProcess(-69420);
}
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char** args = HeapAlloc(heap, 0, arg_count * sizeof(char*));
if (arg_count == 0) {
arg_count = 1;
args[0] = "";
}
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// Convert wide chars into ANSI
for (int i = 0; i < arg_count; i++) {
size_t wide_len = count_wide_chars(args_wide[i]) + 1;
args[i] = HeapAlloc(heap, 0, wide_len);
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convert_wide_chars_to_ansi(args[i], args_wide[i], wide_len);
}
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// Initialize terminal
stdout = (FILE*) GetStdHandle(STD_OUTPUT_HANDLE);
stderr = (FILE*) GetStdHandle(STD_ERROR_HANDLE);
stdin = (FILE*) GetStdHandle(STD_INPUT_HANDLE);
// Initialize heap
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_os_heap heap_data = {
.handle = heap,
};
_heap_setup(&heap_data);
srand(0);
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setlocale(LC_ALL, "C");
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_os_init_eh();
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int exit_code = main(arg_count, args);
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ExitProcess(exit_code);
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}
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// This symbol is required to be present if we're using floating-point
// numbers
int _fltused=0;