47 lines
1.4 KiB
C
47 lines
1.4 KiB
C
/* Calcite, src/kernel/utility.c
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* Copyright 2025 Benji Dial
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "utility.h"
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#include "heap.h"
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int strequ(const char *str1, const char *str2) {
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while (1) {
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if (!*str1 && !*str2)
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return 1;
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if (*str1 != *str2)
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return 0;
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++str1;
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++str2;
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}
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}
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uint32_t end_swap_u32(uint32_t value) {
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return
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(value >> 24) |
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(((value >> 16) & 0xff) << 8) |
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(((value >> 8) & 0xff) << 16) |
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((value & 0xff) << 24);
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}
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void double_buffer_zero(void **buffer, int *length, uint64_t bytes_per_entry) {
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void *new_buffer = heap_alloc(2 * *length * bytes_per_entry);
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memcpy(new_buffer, *buffer, *length * bytes_per_entry);
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heap_dealloc(*buffer, *length * bytes_per_entry);
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memzero(new_buffer + *length * bytes_per_entry, *length * bytes_per_entry);
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*buffer = new_buffer;
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*length *= 2;
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}
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