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How to debug a GLSL shader?
...sinf(x)
// undefined otherwise
float significand(float x)
{
// converting int to float so that exp2(genType) gets correctly-typed value
float expo=float(floorLog2(abs(x)));
return abs(x)/exp2(expo);
}
// Input: x\in
Encrypt & Decrypt using PyCrypto AES 256
...se a random, 16-byte IV.
iv = Random.new().read(AES.block_size)
# Convert the IV to a Python integer.
iv_int = int(binascii.hexlify(iv), 16)
# Create a new Counter object with IV = iv_int.
ctr = Counter.new(AES.block_size * 8, initial_value=iv_int)
# Create AES-CTR cipher...
std::cin input with spaces?
...(and tweak accordingly for multi-word input), or use getline and lexically convert to int after-the-fact.
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Obfuscated C Code Contest 2006. Please explain sykes2.c
...amp;8)|i/64]/(i&2?1:8)%8;
putchar(32 | (b & 1));
}
}
Converting the recursion to a loop and sneaking in a bit more simplification:
// please don't pass any command-line arguments
main() {
int i;
for(i=447; i>=0; i--) {
if(i % 64 == 0) {
putchar('...
Google Authenticator implementation in Python
...def Truncate(hmac_sha1):
"""
Truncate represents the function that converts an HMAC-SHA-1
value into an HOTP value as defined in Section 5.3.
http://tools.ietf.org/html/rfc4226#section-5.3
"""
offset = int(hmac_sha1[-1], 16)
binary = int(hmac_sha1[(offset * 2):((offset ...
Android: Getting a file URI from a content URI?
... cover cursor null cases & conversion from content:// to file://
To convert file, read&write the file from gained uri
public static Uri getFilePathFromUri(Uri uri) throws IOException {
String fileName = getFileName(uri);
File file = new File(myContext.getExternalCacheDir(), fileN...
How to drive C#, C++ or Java compiler to compute 1+2+3+…+1000 at compile time?
...oduces the following compilation error:
Constant value '500500' cannot be converted to a 'char'
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Do I cast the result of malloc?
...n value of malloc. The pointer to void returned by malloc is automagically converted to the correct type. However, if you want your code to compile with a C++ compiler, a cast is needed. A preferred alternative among the community is to use the following:
int *sieve = malloc(sizeof *sieve * length)...
How do I execute a stored procedure once for each row returned by query?
...r INSERT and DELETEs. If you need to do multiple updates with IFs you can convert those to multiple UPDATE FROM with the #temp table and use CASE statements or WHERE conditions.
When working in a database try to lose the mindset of looping, it is a real performance drain, will cause locking/blocki...
How to use SCNetworkReachability in Swift
I'm trying to convert this code snippet to Swift. I'm struggling on getting off the ground due to some difficulties.
7 An...