mirror of
https://github.com/facebook/sapling.git
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31bcfbe58e
Summary: They're actively fighting against the clang-format config and don't have an auto-fix. Reviewed By: quark-zju Differential Revision: D8283622 fbshipit-source-id: 2de45f50e6370a5ed14915c6ff23dc843ff14e8a
64 lines
1.7 KiB
C
64 lines
1.7 KiB
C
// Copyright (c) 2004-present, Facebook, Inc.
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// All Rights Reserved.
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//
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// This software may be used and distributed according to the terms of the
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// GNU General Public License version 2 or any later version.
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// buffer.c: declarations for a generic mechanism to expand a heap-allocated
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// buffer. this is for internal use only.
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// no-check-code
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#ifndef FBHGEXT_CLIB_BUFFER_H
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#define FBHGEXT_CLIB_BUFFER_H
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdlib.h>
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static inline bool expand_to_fit(
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void** buffer,
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size_t num_slots_used,
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size_t* num_slots_total,
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size_t input_count,
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size_t item_sz,
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const float factor,
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const size_t min_increment,
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const size_t max_increment) {
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size_t remaining = *num_slots_total - num_slots_used;
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if (input_count > remaining) {
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// need realloc
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size_t new_slots_total = factor * ((float)*num_slots_total);
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if (new_slots_total < min_increment + *num_slots_total) {
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new_slots_total = min_increment + *num_slots_total;
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}
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if (new_slots_total > max_increment + *num_slots_total) {
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new_slots_total = max_increment + *num_slots_total;
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}
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if (new_slots_total < input_count + *num_slots_total) {
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new_slots_total = input_count + *num_slots_total;
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}
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void* newbuffer = realloc(*buffer, item_sz * new_slots_total);
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if (newbuffer == NULL) {
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return false;
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}
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*buffer = newbuffer;
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*num_slots_total = new_slots_total;
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}
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return true;
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}
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extern bool buffer_append(
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char** buffer,
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size_t* buffer_idx,
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size_t* buffer_sz,
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char* input,
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size_t input_sz,
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const float factor,
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const size_t min_increment,
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const size_t max_increment);
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#endif /* FBHGEXT_CLIB_BUFFER_H */
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