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/* help.c - Alpine Package Keeper (APK)
*
* Copyright (C) 2020 Timo Teräs <timo.teras@iki.fi>
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-only
*/
#include <zlib.h>
#include "apk_applet.h"
#include "apk_print.h"
#include "help.h"
static LIST_HEAD(apk_applet_list);
#define apk_applet_foreach(iter) list_for_each_entry(iter, &apk_applet_list, node)
void apk_applet_register(struct apk_applet *applet)
{
list_init(&applet->node);
list_add_tail(&applet->node, &apk_applet_list);
}
struct apk_applet *apk_applet_find(const char *name)
{
struct apk_applet *a;
apk_applet_foreach(a) {
if (strcmp(name, a->name) == 0)
return a;
}
return NULL;
}
#ifndef NO_HELP
static inline int is_group(struct apk_applet *applet, const char *topic)
{
if (!applet) return strcasecmp(topic, "apk") == 0;
if (strcasecmp(topic, applet->name) == 0) return 1;
for (int i = 0; applet->optgroups[i] && i < ARRAY_SIZE(applet->optgroups); i++)
if (strcasecmp(applet->optgroups[i]->desc, topic) == 0) return 1;
return 0;
}
#endif
void apk_applet_help(struct apk_applet *applet, struct apk_out *out)
{
#ifndef NO_HELP
#ifdef COMPRESSED_HELP
unsigned char buf[payload_help_size];
#endif
const char *ptr = (const char *) payload_help, *base = ptr, *msg;
unsigned long len = payload_help_size;
int num = 0;
#ifdef COMPRESSED_HELP
uncompress(buf, &len, payload_help, sizeof payload_help);
ptr = base = (const char *) buf;
len = sizeof buf;
#endif
for (; *ptr && ptr < &base[len]; ptr = msg + strlen(msg) + 1) {
msg = ptr + strlen(ptr) + 1;
if (is_group(applet, ptr)) {
fputc('\n', stdout);
fwrite(msg, strlen(msg), 1, stdout);
num++;
}
}
if (num == 0) apk_err(out, "Help not found");
#else
fputc('\n', stdout);
apk_err(out, "This apk-tools has been built without help");
#endif
}
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