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#include "fitz-internal.h"
fz_buffer *
fz_new_buffer(fz_context *ctx, int size)
{
fz_buffer *b;
size = size > 1 ? size : 16;
b = fz_malloc_struct(ctx, fz_buffer);
b->refs = 1;
fz_try(ctx)
{
b->data = fz_malloc(ctx, size);
}
fz_catch(ctx)
{
fz_free(ctx, b);
fz_rethrow(ctx);
}
b->cap = size;
b->len = 0;
return b;
}
fz_buffer *
fz_keep_buffer(fz_context *ctx, fz_buffer *buf)
{
if (buf)
{
if (buf->refs == 1 && buf->cap > buf->len+1)
fz_resize_buffer(ctx, buf, buf->len);
buf->refs ++;
}
return buf;
}
void
fz_drop_buffer(fz_context *ctx, fz_buffer *buf)
{
if (!buf)
return;
if (--buf->refs == 0)
{
fz_free(ctx, buf->data);
fz_free(ctx, buf);
}
}
void
fz_resize_buffer(fz_context *ctx, fz_buffer *buf, int size)
{
buf->data = fz_resize_array(ctx, buf->data, size, 1);
buf->cap = size;
if (buf->len > buf->cap)
buf->len = buf->cap;
}
void
fz_grow_buffer(fz_context *ctx, fz_buffer *buf)
{
fz_resize_buffer(ctx, buf, (buf->cap * 3) / 2);
}
void
fz_trim_buffer(fz_context *ctx, fz_buffer *buf)
{
if (buf->cap > buf->len+1)
fz_resize_buffer(ctx, buf, buf->len);
}
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