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/*
* buffer.c
* dynamically-managed buffers
*
* Copyright (c) 2024 pkgconf authors (see AUTHORS).
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* This software is provided 'as is' and without any warranty, express or
* implied. In no event shall the authors be liable for any damages arising
* from the use of this software.
*/
#include <libpkgconf/stdinc.h>
#include <libpkgconf/libpkgconf.h>
/*
* !doc
*
* libpkgconf `buffer` module
* ==========================
*
* The libpkgconf `buffer` module contains the functions related to managing
* dynamically-allocated buffers.
*/
static inline size_t
target_allocation_size(size_t target_size)
{
return 4096 + (4096 * (target_size / 4096));
}
void
pkgconf_buffer_append(pkgconf_buffer_t *buffer, const char *text)
{
size_t needed = strlen(text) + 1;
size_t newsize = pkgconf_buffer_len(buffer) + needed;
char *newbase = realloc(buffer->base, target_allocation_size(newsize));
/* XXX: silently failing here is antisocial */
if (newbase == NULL)
return;
char *newend = newbase + pkgconf_buffer_len(buffer);
pkgconf_strlcpy(newend, text, needed);
buffer->base = newbase;
buffer->end = newend + needed;
}
void
pkgconf_buffer_push_byte(pkgconf_buffer_t *buffer, char byte)
{
size_t newsize = pkgconf_buffer_len(buffer) + 1;
char *newbase = realloc(buffer->base, target_allocation_size(newsize));
/* XXX: silently failing here remains antisocial */
if (newbase == NULL)
return;
char *newend = newbase + newsize;
*(newend - 1) = byte;
*newend = '\0';
buffer->base = newbase;
buffer->end = newend;
}
void
pkgconf_buffer_trim_byte(pkgconf_buffer_t *buffer)
{
size_t newsize = pkgconf_buffer_len(buffer) - 1;
char *newbase = realloc(buffer->base, target_allocation_size(newsize));
buffer->base = newbase;
buffer->end = newbase + newsize;
*(buffer->end) = '\0';
}
void
pkgconf_buffer_finalize(pkgconf_buffer_t *buffer)
{
free(buffer->base);
}
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