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BMP: Fix bug in buffer resize

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The buffer code in bmp_buffer_grow(), reuse the MRT buffer handling code.

Based on comments by Michal Zagorski <mzagorsk@akamai.com>, Thanks!
This commit is contained in:
Ondrej Zajicek 2023-05-31 18:32:53 +02:00
parent e8be7a7080
commit 0799fc99ab
1 changed files with 15 additions and 5 deletions
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20
proto/bmp/buffer.c
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@ -25,22 +25,32 @@ bmp_buffer_free(buffer *buf)
buf->start = buf->pos = buf->end = NULL; buf->start = buf->pos = buf->end = NULL;
} }
/**
* @brief bmp_buffer_grow
* @param buf - buffer to grow
* @param n - required amount of available space
* Resize buffer in a way that there is at least @n bytes of available space.
*/
static void static void
bmp_buffer_grow(buffer *buf, const size_t n) bmp_buffer_grow(buffer *buf, const size_t n)
{ {
const size_t pos = bmp_buffer_pos(buf); size_t pos = bmp_buffer_pos(buf);
buf->start = mb_realloc(buf->start, n); size_t size = bmp_buffer_size(buf);
size_t req = pos + n;
while (size < req)
size = size * 3 / 2;
buf->start = mb_realloc(buf->start, size);
buf->pos = buf->start + pos; buf->pos = buf->start + pos;
buf->end = buf->start + n; buf->end = buf->start + size;
} }
void void
bmp_buffer_need(buffer *buf, const size_t n) bmp_buffer_need(buffer *buf, const size_t n)
{ {
if (bmp_buffer_avail(buf) < n) if (bmp_buffer_avail(buf) < n)
{
bmp_buffer_grow(buf, n); bmp_buffer_grow(buf, n);
}
} }
void void