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/* libmisc/intercept.c - Interceptable ("weak") functions
*
* Copyright (C) 2024-2025 Luke T. Shumaker <lukeshu@lukeshu.com>
* SPDX-License-Identifier: AGPL-3.0-or-later
*/
#include <stdint.h> /* for uintptr_t */
#include <stdio.h> /* for fputc(), stderr */
#include <stdlib.h> /* for abort(), aligned_alloc(), realloc(), free(), random() */
#include <string.h> /* for memcpy() */
#include <libmisc/macro.h>
#include <libmisc/_intercept.h>
[[gnu::weak]]
void __lm_putchar(unsigned char c) {
(void)fputc(c, stderr);
}
[[gnu::weak]]
void __lm_abort(void) {
abort();
}
[[gnu::weak]]
void *__lm_heap_aligned_realloc(void *ptr, size_t align, size_t size) {
if (!size)
size = 1;
size = LM_ROUND_UP(size, align);
if (!ptr) {
void *ret = aligned_alloc(align, size);
memset(ret, 0, size);
return ret;
}
ptr = realloc(ptr, size);
if ((uintptr_t)ptr % align) {
void *new = aligned_alloc(align, size);
memcpy(new, ptr, size);
free(ptr);
ptr = new;
}
return ptr;
}
[[gnu::weak]]
void __lm_heap_free(void *ptr) {
free(ptr);
}
[[gnu::weak]]
void __lm_heap_take(void *) {}
[[gnu::weak]]
uint32_t __lm_rand_uint31(void) {
return (uint32_t)random();
}
[[gnu::weak]]
uint32_t __lm_rand_uint32(void) {
return __lm_rand_uint31() << 31 | __lm_rand_uint31();
}
[[gnu::weak]]
uint64_t __lm_rand_uint62(void) {
return (((uint64_t)__lm_rand_uint31()) << 31) | __lm_rand_uint31();
}
[[gnu::weak]]
uint64_t __lm_rand_uint64(void) {
return (((uint64_t)__lm_rand_uint31()) << 62) | (((uint64_t)__lm_rand_uint31()) << 31) | __lm_rand_uint31();
}
[[gnu::weak]]
uint64_t __lm_rand_uint63(void) {
return __lm_rand_uint64() & UINT64_C(0x7fffffffffffffff);
}
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