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/*
Need to concatenate this file with something that defines:
LPTSTR path_dirs[];
LPTSTR progDll;
LPTSTR rtsDll;
int rtsOpts;
*/
#include <stdarg.h>
#include <stdio.h>
#include <Windows.h>
#include <Shlwapi.h>
#include "Rts.h"
void die(char *fmt, ...) {
va_list argp;
fprintf(stderr, "error: ");
va_start(argp, fmt);
vfprintf(stderr, fmt, argp);
va_end(argp);
fprintf(stderr, "\n");
exit(1);
}
LPTSTR getModuleFileName(void) {
HMODULE hExe;
LPTSTR exePath;
DWORD exePathSize;
DWORD res;
hExe = GetModuleHandle(NULL);
if (hExe == NULL) {
die("GetModuleHandle failed");
}
// 300 chars ought to be enough, but there are various cases where
// it might not be (e.g. unicode paths, or \\server\foo\... paths.
// So we start off with 300 and grow if necessary.
exePathSize = 300;
exePath = malloc(exePathSize);
if (exePath == NULL) {
die("Mallocing %d for GetModuleFileName failed", exePathSize);
}
while ((res = GetModuleFileName(hExe, exePath, exePathSize)) &&
(GetLastError() == ERROR_INSUFFICIENT_BUFFER)) {
exePathSize *= 2;
exePath = realloc(exePath, exePathSize);
if (exePath == NULL) {
die("Reallocing %d for GetModuleFileName failed", exePathSize);
}
}
if (!res) {
die("GetModuleFileName failed");
}
return exePath;
}
void setPath(void) {
LPTSTR *dir;
LPTSTR path;
int n;
int len = 0;
LPTSTR exePath, s;
exePath = getModuleFileName();
for(s = exePath; *s != '\0'; s++) {
if (*s == '\\') {
*s = '/';
}
}
s = StrRChr(exePath, NULL, '/');
if (s == NULL) {
die("No directory separator in executable path: %s", exePath);
}
s[0] = '\0';
n = s - exePath;
for (dir = path_dirs; *dir != NULL; dir++) {
len += n + lstrlen(*dir) + 1/* semicolon */;
}
len++; // NUL
path = malloc(len);
if (path == NULL) {
die("Mallocing %d for PATH failed", len);
}
s = path;
for (dir = path_dirs; *dir != NULL; dir++) {
StrCpy(s, exePath);
s += n;
StrCpy(s, *dir);
s += lstrlen(*dir);
s[0] = ';';
s++;
}
s[0] = '\0';
free(exePath);
if (! SetEnvironmentVariable(TEXT("PATH"), path)) {
printf("SetEnvironmentVariable failed (%d)\n", GetLastError());
}
free(path);
}
HINSTANCE loadDll(LPTSTR dll) {
HINSTANCE h;
DWORD dw;
LPVOID lpMsgBuf;
h = LoadLibrary(dll);
if (h == NULL) {
dw = GetLastError();
FormatMessage(
FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
dw,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPTSTR) &lpMsgBuf,
0, NULL );
die("loadDll %s failed: %d: %s\n", dll, dw, lpMsgBuf);
}
return h;
}
void *GetNonNullProcAddress(HINSTANCE h, char *sym) {
void *p;
p = GetProcAddress(h, sym);
if (p == NULL) {
die("Failed to find address for %s", sym);
}
return p;
}
HINSTANCE GetNonNullModuleHandle(LPTSTR dll) {
HINSTANCE h;
h = GetModuleHandle(dll);
if (h == NULL) {
die("Failed to get module handle for %s", dll);
}
return h;
}
typedef int (*hs_main_t)(int , char **, StgClosure *, RtsConfig);
int main(int argc, char *argv[]) {
void *p;
HINSTANCE hRtsDll, hProgDll;
LPTSTR oldPath;
StgClosure *main_p;
RtsConfig rts_config;
hs_main_t hs_main_p;
// MSDN says: An environment variable has a maximum size limit of
// 32,767 characters, including the null-terminating character.
oldPath = malloc(32767);
if (oldPath == NULL) {
die("Mallocing 32767 for oldPath failed");
}
if (!GetEnvironmentVariable(TEXT("PATH"), oldPath, 32767)) {
if (GetLastError() == ERROR_ENVVAR_NOT_FOUND) {
oldPath[0] = '\0';
}
else {
die("Looking up PATH env var failed");
}
}
setPath();
hProgDll = loadDll(progDll);
if (! SetEnvironmentVariable(TEXT("PATH"), oldPath)) {
printf("SetEnvironmentVariable failed (%d)\n", GetLastError());
}
free(oldPath);
hRtsDll = GetNonNullModuleHandle(rtsDll);
hs_main_p = GetNonNullProcAddress(hRtsDll, "hs_main");
main_p = GetNonNullProcAddress(hProgDll, "ZCMain_main_closure");
rts_config.rts_opts_enabled = rtsOpts;
rts_config.rts_opts = NULL;
return hs_main_p(argc, argv, main_p, rts_config);
}
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