93 lines
2.8 KiB
C
93 lines
2.8 KiB
C
/* *****************************************************************************
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* encode/main.c -- encode a file.
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* Copyright (C) 2017 Thomas "Cakeisalie5" Touhey <thomas@touhey.fr>
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*
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* This file is part of libg1m.
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* libg1m is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 3.0 of the License,
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* or (at your option) any later version.
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*
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* libg1m is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with libg1m; if not, see <http://www.gnu.org/licenses/>.
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* ************************************************************************** */
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#include <libg1m/internals.h>
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#define FUNCS(NAME) g1m_announce_##NAME, g1m_encode_##NAME
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/* ************************************************************************** */
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/* Correspondances */
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/* ************************************************************************** */
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/* Types */
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typedef int (*announce_t)(g1m_handle_t*, size_t*);
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typedef int (*encode_t)(g1m_handle_t*, g1m_buffer_t*);
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struct corresp {
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/* 'identification' */
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g1m_type_t types;
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g1m_platform_t platforms;
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/* functions */
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announce_t announce;
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encode_t encode;
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};
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/* All correspondances */
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static const struct corresp encodings[] = {
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/* add-in types */
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{g1m_type_addin, g1m_platform_fx, FUNCS(addin)},
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/* sentinel */
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{0, 0, NULL, NULL}
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};
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/* ************************************************************************** */
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/* Main function */
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/* ************************************************************************** */
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/**
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* g1m_encode:
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* Encode a file.
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*
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* @arg handle the handle.
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* @arg buffer the buffer to write to.
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* @return the error code (0 if ok).
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*/
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int g1m_encode(g1m_handle_t *handle, g1m_buffer_t *buffer)
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{
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int err;
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/* find the announcement and encoding function */
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const struct corresp *c = encodings - 1;
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while ((++c)->encode) {
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if (c->types && !(c->types & handle->type))
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continue;
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if (c->platforms && !(c->platforms & handle->platform))
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continue;
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break;
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}
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if (!c->encode) return (g1m_error_op);
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/* announce, if necessary */
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if (buffer->announce) {
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size_t size = 0;
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if ((err = (*c->announce)(handle, &size))
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|| (err = (*buffer->announce)(buffer->cookie, size)))
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return (err);
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}
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/* encode */
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if (buffer->write) {
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err = (*c->encode)(handle, buffer);
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if (err) {
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(*buffer->unannounce)(buffer->cookie);
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return (err);
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}
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}
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/* everything went well! */
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return (0);
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}
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