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/*
* util.c
* Copyright 2009-2013 John Lindgren and Michał Lipski
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions, and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions, and the following disclaimer in the documentation
* provided with the distribution.
*
* 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 "internal.h"
#include <errno.h>
#include <pthread.h>
#include <stdint.h>
#include <string.h>
#include <unistd.h>
#include <glib/gstdio.h>
#include "audstrings.h"
#include "runtime.h"
const char * get_home_utf8 ()
{
static pthread_once_t once = PTHREAD_ONCE_INIT;
static char * home_utf8;
auto init = [] ()
{ home_utf8 = g_filename_to_utf8 (g_get_home_dir (), -1, nullptr, nullptr, nullptr); };
pthread_once (& once, init);
return home_utf8;
}
bool dir_foreach (const char * path, DirForeachFunc func, void * user)
{
GDir * dir = g_dir_open (path, 0, nullptr);
if (! dir)
return false;
const char * name;
while ((name = g_dir_read_name (dir)))
{
if (func (filename_build ({path, name}), name, user))
break;
}
g_dir_close (dir);
return true;
}
String write_temp_file (const void * data, int64_t len)
{
StringBuf name = filename_build ({g_get_tmp_dir (), "audacious-temp-XXXXXX"});
int handle = g_mkstemp (name);
if (handle < 0)
{
AUDERR ("Error creating temporary file: %s\n", strerror (errno));
return String ();
}
while (len)
{
int64_t written = write (handle, data, len);
if (written < 0)
{
AUDERR ("Error writing %s: %s\n", (const char *) name, strerror (errno));
close (handle);
return String ();
}
data = (char *) data + written;
len -= written;
}
if (close (handle) < 0)
{
AUDERR ("Error closing %s: %s\n", (const char *) name, strerror (errno));
return String ();
}
return String (name);
}
bool same_basename (const char * a, const char * b)
{
const char * dot_a = strrchr (a, '.');
const char * dot_b = strrchr (b, '.');
int len_a = dot_a ? dot_a - a : strlen (a);
int len_b = dot_b ? dot_b - b : strlen (b);
return len_a == len_b && ! strcmp_nocase (a, b, len_a);
}
const char * last_path_element (const char * path)
{
const char * slash = strrchr (path, G_DIR_SEPARATOR);
return (slash && slash[1]) ? slash + 1 : nullptr;
}
void cut_path_element (char * path, int pos)
{
#ifdef _WIN32
if (pos > 3)
#else
if (pos > 1)
#endif
path[pos - 1] = 0; /* overwrite slash */
else
path[pos] = 0; /* leave [drive letter and] leading slash */
}
bool is_cuesheet_entry (const char * filename)
{
const char * ext, * sub;
uri_parse (filename, nullptr, & ext, & sub, nullptr);
return sub[0] && sub - ext == 4 && ! strcmp_nocase (ext, ".cue", 4);
}
bool is_subtune (const char * filename)
{
const char * sub;
uri_parse (filename, nullptr, nullptr, & sub, nullptr);
return sub[0];
}
StringBuf strip_subtune (const char * filename)
{
const char * sub;
uri_parse (filename, nullptr, nullptr, & sub, nullptr);
return str_copy (filename, sub - filename);
}
/* Thomas Wang's 32-bit mix function. See:
* http://web.archive.org/web/20070307172248/http://www.concentric.net/~Ttwang/tech/inthash.htm */
unsigned int32_hash (unsigned val)
{
val = ~val + (val << 15);
val = val ^ (val >> 12);
val = val + (val << 2);
val = val ^ (val >> 4);
val = val * 2057;
val = val ^ (val >> 16);
return val;
}
unsigned ptr_hash (const void * ptr)
{
unsigned addr_low = (uint64_t) (uintptr_t) ptr;
unsigned addr_high = (uint64_t) (uintptr_t) ptr >> 32;
return int32_hash (addr_low + addr_high);
}
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