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allow external define of FP_GEN_RANDOM

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This commit is contained in:
Steffen Jaeckel 2017-04-04 00:45:06 +02:00
parent 8e034dcf6e
commit 1404af6262
1 changed files with 7 additions and 9 deletions
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16
src/headers/tfm.h
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@ -252,18 +252,16 @@
#endif
#endif
/* platforms that can use a better rand function */
#if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__) || defined(__DragonFly__)
#define FP_USE_ALT_RAND 1
#endif
/* use arc4random on platforms that support it */
#ifdef FP_USE_ALT_RAND
#if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__) || defined(__DragonFly__)
#define FP_GEN_RANDOM() arc4random()
#define FP_GEN_RANDOM_MAX 0xffffffff
#else
#define FP_GEN_RANDOM() rand()
#define FP_GEN_RANDOM_MAX RAND_MAX
#endif
/* use rand() as fall-back if there's no better rand function */
#ifndef FP_GEN_RANDOM
#define FP_GEN_RANDOM() rand()
#define FP_GEN_RANDOM_MAX RAND_MAX
#endif
/* some default configurations.