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Diffstat (limited to 'test/testrandom.c')
| -rw-r--r-- | test/testrandom.c | 153 |
1 files changed, 0 insertions, 153 deletions
diff --git a/test/testrandom.c b/test/testrandom.c deleted file mode 100644 index 5b85a6e8..00000000 --- a/test/testrandom.c +++ /dev/null @@ -1,153 +0,0 @@ -/*============================================================================= - testrandom -=============================================================================== - Test for the random number generator type by generating 5 values with rand() - and comparing them against values in a table. - - Currently only recognizes ISO glibc rand(). - - Options: - -q : quiet mode - -x : print exit code to stdout, otherwise equivalent to quite mode - -v : verbose mode : Use to generate values for new table - - This is a self-contained program which does not require any libnetpbm - functions. -=============================================================================*/ -#include <stdio.h> -#include <stdlib.h> - -#define bool int -#define TRUE 1 -#define FALSE 0 - - -/* Exit values */ -#define EXIT_ERROR 1 -#define EXIT_UNKNOWN 80 -#define ISO_GLIBC 81 -#define MAC_OS 82 -/* 83-90: reserved */ - -typedef enum {QUIET=0, NORMAL=1, VERBOSE=2} VerbosityLevel; - -/* On some Sun systems RAND_MAX is not defined */ -#ifndef RAND_MAX -#define RAND_MAX 0 -#endif - -#define SEED 3791 - -static struct { - int const type; - /* Exit value for this rand() function */ - int const randMax; - /* Usually 0x7fffffff, sometimes 0x7fff */ - /* Other values are possible; 0 means undefined */ - unsigned int const res[5]; - /* Sample values returned from our tests */ - const char * const name; - /* Name for this rand() function */ -} rTable[3] = { - { ISO_GLIBC, /* glibc rand() */ - 0x7fffffff, /* 31 bits */ - { 217313873, 969144303, 1757357552, 1096307597, 818311031 }, - "ISO C glibc rand() or equivalent" }, - { MAC_OS, - 0x7fffffff, /* 31 bits */ - { 63715337, 1416812753, 1073261735, 1594828992, 1547470337 }, - "MAC OS c library rand() or equivalent" }, - - /* Insert additional entries here */ - - { 0, /* terminating code */ - 0, - {0, 0, 0, 0, 0}, NULL /* unknown type */} -}; - - - -static void -parseCommandLine(int const argc, - const char * const argv[], - VerbosityLevel * const verbosityP, - bool * const printExitCodeP) { - - *verbosityP = NORMAL; /* Initial value */ - *printExitCodeP = FALSE; /* Initial value */ - - if (argc == 2) { - if (argv[1][0] == '-' && argv[1][2] == '\0') { - switch ( argv[1][1] ) { - case 'v' : *verbosityP = VERBOSE; break; - case 'q' : *verbosityP = QUIET ; break; - case 'x' : *verbosityP = QUIET ; - *printExitCodeP = TRUE ; break; - default : fprintf (stderr, - "Error: Unrecognized argument: %s\n", argv[1]); - exit (EXIT_ERROR); - } - } - } - if (argc > 2 ) { - fprintf (stderr, "Error: Too many arguments.\n"); - exit (EXIT_ERROR); - } -} - - - -int -main(int const argc, const char * const argv[]) { - - unsigned int i; - unsigned int res[5]; - VerbosityLevel verbosity; - bool printExitCode; - - parseCommandLine(argc, argv, &verbosity, &printExitCode); - - if (verbosity == VERBOSE) { - if (RAND_MAX > 0) - fprintf(stderr, "RAND_MAX = 0x%x (%d)\n", RAND_MAX, RAND_MAX); - else - fprintf(stderr, "RAND_MAX is undefined\n"); - } - - /* Set seed for pseudo-random number generator */ - if (verbosity == VERBOSE) - fprintf(stderr, "Generating samples. Seed=%u\n", SEED); - - srand(SEED); - - /* Generate five samples and store in array res[] */ - for (i = 0; i < 5; ++i) { - res[i] = rand(); - if (verbosity == VERBOSE) - fprintf (stderr, "%d\n",res[i]); - } - - /* Look for a match in table */ - for (i = 0; rTable[i].type != 0; ++i) { - if (rTable[i].randMax == RAND_MAX && rTable[i].res[0] == res[0] && - rTable[i].res[1] == res[1] && rTable[i].res[2] == res[2] && - rTable[i].res[3] == res[3] && rTable[i].res[4] == res[4]) { - if (verbosity != QUIET) - fprintf(stderr, - "Random number generator is %s.\n", rTable[i].name); - - if (printExitCode == TRUE) - printf("%03u", rTable[i].type); - exit(rTable[i].type); - } - } - /* No matches */ - if (verbosity != QUIET) - fprintf(stderr, "Random number generator is of unknown type.\n"); - if (printExitCode == TRUE) - printf("%03u",EXIT_UNKNOWN); - exit(EXIT_UNKNOWN); -} - - - |