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#ifndef ITS1_RANDOM_H_INCLUDED
#define ITS1_RANDOM_H_INCLUDED
#ifdef __cplusplus
extern "C" {
#endif
struct random_ctx {
unsigned char (*get_byte)(struct random_ctx *ctx);
};
static unsigned char
random_get_byte(struct random_ctx *ctx)
{
return ctx->get_byte(ctx);
}
static unsigned short
random_get_word(struct random_ctx *ctx)
{
return (ctx->get_byte(ctx) << 8)
| ctx->get_byte(ctx)
;
}
static unsigned long
random_get_dword(struct random_ctx *ctx)
{
return (ctx->get_byte(ctx) << 24)
| (ctx->get_byte(ctx) << 16)
| (ctx->get_byte(ctx) << 8)
| ctx->get_byte(ctx)
;
}
static unsigned long
random_get_dword_range(struct random_ctx *ctx, unsigned long l, unsigned long u)
{
return l + random_get_dword(ctx) % (u - l + 1);
}
#ifdef __cplusplus
}
#endif
#endif /* ITS1_RANDOM_H_INCLUDED */
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