A class for automatically creating unique pseudo-random filenames.
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static unsigned int | hashString (const char *str) |
| creates hash value.
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static int | myrand_r (unsigned int *seed) |
| simple but thread safe random number generator.
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static void | addLongToString (unsigned long l, OFString &s) |
| appends the lower 32 bit of the given number to the given string.
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A class for automatically creating unique pseudo-random filenames.
Definition at line 39 of file offname.h.
static void OFFilenameCreator::addLongToString |
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unsigned long |
l, |
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OFString & |
s |
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) |
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staticprivate |
appends the lower 32 bit of the given number to the given string.
Always appends exactly 8 digits (padded with leading zeroes).
- Parameters
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l | number to be appended to string |
s | string to be added to |
static unsigned int OFFilenameCreator::hashString |
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const char * |
str | ) |
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static |
creates hash value.
(i.e. random seed) from character string.
- Parameters
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str | null-terminated string |
- Returns
- hash value
OFBool OFFilenameCreator::makeFilename |
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unsigned int |
seed, |
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const char * |
dir, |
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const char * |
prefix, |
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const char * |
postfix, |
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OFString & |
filename |
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) |
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creates a new unique filename.
- Parameters
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seed | seed of random number generator |
dir | directory in which the file name should be located |
prefix | filename prefix |
postfix | filename postfix |
filename | string in which the filename (path) is returned |
- Returns
- OFTrue if successful, OFFalse if no filename could be created.
static int OFFilenameCreator::myrand_r |
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unsigned int * |
seed | ) |
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static |
simple but thread safe random number generator.
The interface is derived from the Posix rand_r function. Uses a multiplicative congruential random-number generator with period 2**32 that returns successive pseudo-random numbers in the range of 0 to 0x7fffffff.
- Parameters
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seed | pointer to seed of random number generator, must not be NULL. |
- Returns
- pseudo-random number in the range of 0 to 0x7fffffff.
The documentation for this class was generated from the following file: