common.c

一个很有名的浏览器

/* MIME handling backends multiplexing */
/* $Id: common.c,v 1.21.4.1 2005/04/05 21:08:42 jonas Exp $ */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "elinks.h"

#include "mime/backend/common.h"
#include "mime/mime.h"
#include "modules/module.h"
#include "util/file.h"
#include "util/memory.h"
#include "util/string.h"


/* Backends dynamic area: */

#include "mime/backend/default.h"
#include "mime/backend/mailcap.h"
#include "mime/backend/mimetypes.h"

static struct mime_backend *mime_backends[] = {
	&default_mime_backend,
#ifdef CONFIG_MAILCAP
	&mailcap_mime_backend,
#endif
#ifdef CONFIG_MIMETYPES
	&mimetypes_mime_backend,
#endif
	NULL,

};

unsigned char *
get_content_type_backends(unsigned char *extension)
{
	struct mime_backend *backend;
	int i;

	foreach_module (backend, mime_backends, i) {
		if (backend->get_content_type) {
			unsigned char *content_type;

			content_type = backend->get_content_type(extension);
			if (content_type) return content_type;
		}
	}

	return NULL;
}

struct mime_handler *
get_mime_handler_backends(unsigned char *ctype, int have_x)
{
	struct mime_backend *backend;
	int i;

	foreach_module (backend, mime_backends, i) {
		if (backend->get_mime_handler) {
			struct mime_handler *handler;

			handler = backend->get_mime_handler(ctype, have_x);
			if (handler) return handler;
		}
	}

	return NULL;
}

unsigned char *
get_next_path_filename(unsigned char **path_ptr, unsigned char separator)
{
	unsigned char *path = *path_ptr;
	unsigned char *filename = path;
	int filenamelen;

	/* Extract file from path */
	while (*path && *path != separator)
		path++;

	filenamelen = path - filename;

	/* If not at end of string skip separator */
	if (*path)
		path++;

	*path_ptr = path;

	if (filenamelen > 0) {
		unsigned char *tmp = memacpy(filename, filenamelen);

		if (!tmp) return NULL;
		filename = expand_tilde(tmp);
		mem_free(tmp);
	} else {
		filename = NULL;
	}

	return filename;
}

struct mime_handler *
init_mime_handler(unsigned char *program, unsigned char *description,
		  unsigned char *backend_name, int ask, int block)
{
	int programlen = strlen(program);
	struct mime_handler *handler;

	handler = mem_calloc(1, sizeof(*handler) + programlen);
	if (!handler) return NULL;

	memcpy(handler->program, program, programlen);

	handler->description = empty_string_or_(description);
	handler->backend_name = backend_name;
	handler->block = block;
	handler->ask = ask;

	return handler;
}