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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "GLLibraryLoader.h"
#include "nsDebug.h"
#ifdef WIN32
#include <windows.h>
#endif
namespace mozilla {
namespace gl {
bool
GLLibraryLoader::OpenLibrary(const char* library)
{
PRLibSpec lspec;
lspec.type = PR_LibSpec_Pathname;
lspec.value.pathname = library;
mLibrary = PR_LoadLibraryWithFlags(lspec, PR_LD_LAZY | PR_LD_LOCAL);
if (!mLibrary)
return false;
return true;
}
bool
GLLibraryLoader::LoadSymbols(const SymLoadStruct* firstStruct,
bool tryplatform,
const char* prefix,
bool warnOnFailure)
{
return LoadSymbols(mLibrary,
firstStruct,
tryplatform ? mLookupFunc : nullptr,
prefix,
warnOnFailure);
}
PRFuncPtr
GLLibraryLoader::LookupSymbol(PRLibrary* lib,
const char* sym,
PlatformLookupFunction lookupFunction)
{
PRFuncPtr res = 0;
// try finding it in the library directly, if we have one
if (lib) {
res = PR_FindFunctionSymbol(lib, sym);
}
// then try looking it up via the lookup symbol
if (!res && lookupFunction) {
res = lookupFunction(sym);
}
// finally just try finding it in the process
if (!res) {
PRLibrary* leakedLibRef;
res = PR_FindFunctionSymbolAndLibrary(sym, &leakedLibRef);
}
return res;
}
bool
GLLibraryLoader::LoadSymbols(PRLibrary* lib,
const SymLoadStruct* firstStruct,
PlatformLookupFunction lookupFunction,
const char* prefix,
bool warnOnFailure)
{
char sbuf[MAX_SYMBOL_LENGTH * 2];
int failCount = 0;
const SymLoadStruct* ss = firstStruct;
while (ss->symPointer) {
*ss->symPointer = 0;
for (int i = 0; i < MAX_SYMBOL_NAMES; i++) {
if (ss->symNames[i] == nullptr)
break;
const char* s = ss->symNames[i];
if (prefix && *prefix != 0) {
strcpy(sbuf, prefix);
strcat(sbuf, ss->symNames[i]);
s = sbuf;
}
PRFuncPtr p = LookupSymbol(lib, s, lookupFunction);
if (p) {
*ss->symPointer = p;
break;
}
}
if (*ss->symPointer == 0) {
if (warnOnFailure) {
printf_stderr("Can't find symbol '%s'.\n", ss->symNames[0]);
}
failCount++;
}
ss++;
}
return failCount == 0 ? true : false;
}
} /* namespace gl */
} /* namespace mozilla */
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