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Nasal: expose md5 function.

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This commit is contained in:
Thomas Geymayer 2014-06-17 22:33:53 +02:00
parent da2bb6353e
commit cfbf9e7e4e
1 changed files with 31 additions and 0 deletions
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31
src/Scripting/NasalSys.cxx
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@ -28,6 +28,7 @@
#include <simgear/math/sg_geodesy.hxx>
#include <simgear/structure/event_mgr.hxx>
#include <simgear/debug/BufferedLogCallback.hxx>
#include <simgear/package/md5.h>
#include <simgear/nasal/cppbind/from_nasal.hxx>
#include <simgear/nasal/cppbind/to_nasal.hxx>
@ -711,6 +712,35 @@ static naRef f_parse_markdown(naContext c, naRef me, int argc, naRef* args)
);
}
/**
* Create md5 hash from given string
*
* md5(str)
*/
static naRef f_md5(naContext c, naRef me, int argc, naRef* args)
{
nasal::CallContext ctx(c, argc, args);
std::string const str = ctx.requireArg<std::string>(0);
SG_MD5_CTX md5_ctx;
SG_MD5Init(&md5_ctx);
SG_MD5Update(&md5_ctx, (unsigned char*)str.c_str(), str.size());
unsigned char digest[MD5_DIGEST_LENGTH];
SG_MD5Final(digest, &md5_ctx);
// TODO make something more generic
// convert final sum to hex
const char hexChar[] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};
std::stringstream hexMd5;
for (int i=0; i<MD5_DIGEST_LENGTH;++i) {
hexMd5 << hexChar[digest[i] >> 4];
hexMd5 << hexChar[digest[i] & 0x0f];
}
return ctx.to_nasal(hexMd5.str());
}
// Return UNIX epoch time in seconds.
static naRef f_systime(naContext c, naRef me, int argc, naRef* args)
{
@ -750,6 +780,7 @@ static struct { const char* name; naCFunction func; } funcs[] = {
{ "finddata", f_findDataDir },
{ "parsexml", f_parsexml },
{ "parse_markdown", f_parse_markdown },
{ "md5", f_md5 },
{ "systime", f_systime },
{ 0, 0 }
};