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/* -*- c++ -*- */
/*
* Copyright 2011, 2012, 2015, 2016, 2019, 2020 Free Software Foundation, Inc.
*
* This file is part of VOLK
*
* SPDX-License-Identifier: LGPL-3.0-or-later
*/
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#if defined(_MSC_VER)
#include <io.h>
#define access _access
#define F_OK 0
#else
#include <unistd.h>
#endif
#include <volk/volk_prefs.h>
void volk_get_config_path(char* path, bool read)
{
if (!path)
return;
const char* suffix = "/.volk/volk_config";
const char* suffix2 = "/volk/volk_config"; // non-hidden
char* home = NULL;
// allows config redirection via env variable
home = getenv("VOLK_CONFIGPATH");
if (home != NULL) {
strncpy(path, home, 512);
strcat(path, suffix2);
if (!read || access(path, F_OK) != -1) {
return;
}
}
// check for user-local config file
home = getenv("HOME");
if (home != NULL) {
strncpy(path, home, 512);
strcat(path, suffix);
if (!read || (access(path, F_OK) != -1)) {
return;
}
}
// check for config file in APPDATA (Windows)
home = getenv("APPDATA");
if (home != NULL) {
strncpy(path, home, 512);
strcat(path, suffix);
if (!read || (access(path, F_OK) != -1)) {
return;
}
}
// check for system-wide config file
if (access("/etc/volk/volk_config", F_OK) != -1) {
strncpy(path, "/etc", 512);
strcat(path, suffix2);
if (!read || (access(path, F_OK) != -1)) {
return;
}
}
// If still no path was found set path[0] to '0' and fall through
path[0] = 0;
return;
}
size_t volk_load_preferences(volk_arch_pref_t** prefs_res)
{
FILE* config_file;
char path[512], line[512];
size_t n_arch_prefs = 0;
volk_arch_pref_t* prefs = NULL;
// get the config path
volk_get_config_path(path, true);
if (!path[0])
return n_arch_prefs; // no prefs found
config_file = fopen(path, "r");
if (!config_file)
return n_arch_prefs; // no prefs found
// reset the file pointer and write the prefs into volk_arch_prefs
while (fgets(line, sizeof(line), config_file) != NULL) {
void* new_prefs = realloc(prefs, (n_arch_prefs + 1) * sizeof(*prefs));
if (!new_prefs) {
printf("volk_load_preferences: bad malloc\n");
break;
}
prefs = (volk_arch_pref_t*)new_prefs;
volk_arch_pref_t* p = prefs + n_arch_prefs;
if (sscanf(line, "%s %s %s", p->name, p->impl_a, p->impl_u) == 3 &&
!strncmp(p->name, "volk_", 5)) {
n_arch_prefs++;
}
}
fclose(config_file);
*prefs_res = prefs;
return n_arch_prefs;
}
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