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#include <stdlib.h>
#include <string.h>
#include <assert.h>
#ifndef size_t
# include <stddef.h>
#endif
#if defined(_WIN32) || defined(_WIN64)
# include <windows.h>
#elif defined(__posix__) || defined(__unix__) || defined(__linux__) || defined(__APPLE__)
# include <dlfcn.h>
#else
# warning "cdl: unsupported os"
#endif
void* chckDlLoad(const char *file, const char **outError)
{
assert(file);
void *handle = NULL;
const char *error = NULL;
#if defined(_WIN32) || defined(_WIN64)
#if defined(__WINRT__)
/**
* WinRT only publically supports LoadPackagedLibrary() for loading .dll
* files. LoadLibrary() is a private API, and not available for apps
* (that can be published to MS' Windows Store.)
*/
handle = (void*)LoadPackagedLibrary(file, 0);
#else
handle = (void*)LoadLibrary(file);
#endif
if (!handle)
error = "Failed to load dll file.";
#elif defined(__posix__) || defined(__unix__) || defined(__linux__) || defined(__APPLE__)
if (!(handle = dlopen(file, RTLD_NOW | RTLD_LOCAL)))
error = dlerror();
#else
error = "cdl: unsupported os";
#endif
if (outError)
*outError = error;
return handle;
}
void* chckDlLoadSymbol(void *handle, const char *name, const char **outError)
{
assert(handle);
void *symbol = NULL;
const char *error = NULL;
#if defined(_WIN32) || defined(_WIN64)
if (!(symbol = (void*)GetProcAddress((HMODULE)handle, name)))
error = "Failed to load symbol.";
#elif defined(__posix__) || defined(__unix__) || defined(__linux__) || defined(__APPLE__)
if (!(symbol = dlsym(handle, name))) {
size_t len = strlen(name) + 1;
char *nname = calloc(1, len + 1);
if (nname) {
/* append an underscore for platforms that need that. */
nname[0] = '_';
memcpy(nname + 1, name, len);
symbol = dlsym(handle, nname);
free(nname);
}
}
if (!symbol)
error = dlerror();
#else
error = "cdl: unsupported os";
#endif
if (outError)
*outError = error;
return symbol;
}
void chckDlUnload(void *handle)
{
assert(handle);
#if defined(_WIN32) || defined(_WIN64)
FreeLibrary((HMODULE)handle);
#elif defined(__posix__) || defined(__unix__) || defined(__linux__) || defined(__APPLE__)
dlclose(handle);
#endif
}
/* vim: set ts=8 sw=3 tw=0 :*/
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