Alc/helpers.c

   1 /**
   2  * OpenAL cross platform audio library
   3  * Copyright (C) 2011 by authors.
   4  * This library is free software; you can redistribute it and/or
   5  *  modify it under the terms of the GNU Library General Public
   6  *  License as published by the Free Software Foundation; either
   7  *  version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  *  Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Library General Public
  15  *  License along with this library; if not, write to the
  16  *  Free Software Foundation, Inc.,
  17  *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  * Or go to http://www.gnu.org/copyleft/lgpl.html
  19  */
  20
  21 #ifdef _WIN32
  22 #ifdef __MINGW32__
  23 #define _WIN32_IE 0x501
  24 #else
  25 #define _WIN32_IE 0x400
  26 #endif
  27 #endif
  28
  29 #include "config.h"
  30
  31 #include <stdlib.h>
  32 #include <time.h>
  33 #include <errno.h>
  34 #include <stdarg.h>
  35 #ifdef HAVE_MALLOC_H
  36 #include <malloc.h>
  37 #endif
  38 #ifdef HAVE_DIRENT_H
  39 #include <dirent.h>
  40 #endif
  41
  42 #ifndef AL_NO_UID_DEFS
  43 #if defined(HAVE_GUIDDEF_H) || defined(HAVE_INITGUID_H)
  44 #define INITGUID
  45 #include <windows.h>
  46 #ifdef HAVE_GUIDDEF_H
  47 #include <guiddef.h>
  48 #else
  49 #include <initguid.h>
  50 #endif
  51
  52 DEFINE_GUID(KSDATAFORMAT_SUBTYPE_PCM,        0x00000001, 0x0000, 0x0010, 0x80,0x00, 0x00,0xaa,0x00,0x38,0x9b,0x71);
  53 DEFINE_GUID(KSDATAFORMAT_SUBTYPE_IEEE_FLOAT, 0x00000003, 0x0000, 0x0010, 0x80,0x00, 0x00,0xaa,0x00,0x38,0x9b,0x71);
  54
  55 DEFINE_GUID(IID_IDirectSoundNotify,   0xb0210783, 0x89cd, 0x11d0, 0xaf,0x08, 0x00,0xa0,0xc9,0x25,0xcd,0x16);
  56
  57 DEFINE_GUID(CLSID_MMDeviceEnumerator, 0xbcde0395, 0xe52f, 0x467c, 0x8e,0x3d, 0xc4,0x57,0x92,0x91,0x69,0x2e);
  58 DEFINE_GUID(IID_IMMDeviceEnumerator,  0xa95664d2, 0x9614, 0x4f35, 0xa7,0x46, 0xde,0x8d,0xb6,0x36,0x17,0xe6);
  59 DEFINE_GUID(IID_IAudioClient,         0x1cb9ad4c, 0xdbfa, 0x4c32, 0xb1,0x78, 0xc2,0xf5,0x68,0xa7,0x03,0xb2);
  60 DEFINE_GUID(IID_IAudioRenderClient,   0xf294acfc, 0x3146, 0x4483, 0xa7,0xbf, 0xad,0xdc,0xa7,0xc2,0x60,0xe2);
  61 DEFINE_GUID(IID_IAudioCaptureClient,  0xc8adbd64, 0xe71e, 0x48a0, 0xa4,0xde, 0x18,0x5c,0x39,0x5c,0xd3,0x17);
  62
  63 #ifdef HAVE_MMDEVAPI
  64 #include <devpropdef.h>
  65 #include <propkeydef.h>
  66 DEFINE_DEVPROPKEY(DEVPKEY_Device_FriendlyName, 0xa45c254e, 0xdf1c, 0x4efd, 0x80,0x20, 0x67,0xd1,0x46,0xa8,0x50,0xe0, 14);
  67 DEFINE_PROPERTYKEY(PKEY_AudioEndpoint_FormFactor, 0x1da5d803, 0xd492, 0x4edd, 0x8c,0x23, 0xe0,0xc0,0xff,0xee,0x7f,0x0e, 0);
  68 #endif
  69 #endif
  70 #endif /* AL_NO_UID_DEFS */
  71
  72 #ifdef HAVE_DLFCN_H
  73 #include <dlfcn.h>
  74 #endif
  75 #ifdef HAVE_INTRIN_H
  76 #include <intrin.h>
  77 #endif
  78 #ifdef HAVE_CPUID_H
  79 #include <cpuid.h>
  80 #endif
  81 #ifdef HAVE_SYS_SYSCONF_H
  82 #include <sys/sysconf.h>
  83 #endif
  84 #ifdef HAVE_FLOAT_H
  85 #include <float.h>
  86 #endif
  87 #ifdef HAVE_IEEEFP_H
  88 #include <ieeefp.h>
  89 #endif
  90
  91 #ifndef _WIN32
  92 #include <unistd.h>
  93 #elif defined(_WIN32_IE)
  94 #include <shlobj.h>
  95 #endif
  96
  97 #include "alMain.h"
  98 #include "alu.h"
  99 #include "atomic.h"
 100 #include "uintmap.h"
 101 #include "vector.h"
 102 #include "alstring.h"
 103 #include "compat.h"
 104 #include "threads.h"
 105
 106
 107 extern inline ALuint NextPowerOf2(ALuint value);
 108 extern inline ALint fastf2i(ALfloat f);
 109 extern inline ALuint fastf2u(ALfloat f);
 110
 111
 112 ALuint CPUCapFlags = 0;
 113
 114
 115 void FillCPUCaps(ALuint capfilter)
 116 {
 117     ALuint caps = 0;
 118
 119 /* FIXME: We really should get this for all available CPUs in case different
 120  * CPUs have different caps (is that possible on one machine?). */
 121 #if defined(HAVE_GCC_GET_CPUID) && (defined(__i386__) || defined(__x86_64__) || \
 122                                     defined(_M_IX86) || defined(_M_X64))
 123     union {
 124         unsigned int regs[4];
 125         char str[sizeof(unsigned int[4])];
 126     } cpuinf[3];
 127
 128     if(!__get_cpuid(0, &cpuinf[0].regs[0], &cpuinf[0].regs[1], &cpuinf[0].regs[2], &cpuinf[0].regs[3]))
 129         ERR("Failed to get CPUID\n");
 130     else
 131     {
 132         unsigned int maxfunc = cpuinf[0].regs[0];
 133         unsigned int maxextfunc = 0;
 134
 135         if(__get_cpuid(0x80000000, &cpuinf[0].regs[0], &cpuinf[0].regs[1], &cpuinf[0].regs[2], &cpuinf[0].regs[3]))
 136             maxextfunc = cpuinf[0].regs[0];
 137         TRACE("Detected max CPUID function: 0x%x (ext. 0x%x)\n", maxfunc, maxextfunc);
 138
 139         TRACE("Vendor ID: \"%.4s%.4s%.4s\"\n", cpuinf[0].str+4, cpuinf[0].str+12, cpuinf[0].str+8);
 140         if(maxextfunc >= 0x80000004 &&
 141            __get_cpuid(0x80000002, &cpuinf[0].regs[0], &cpuinf[0].regs[1], &cpuinf[0].regs[2], &cpuinf[0].regs[3]) &&
 142            __get_cpuid(0x80000003, &cpuinf[1].regs[0], &cpuinf[1].regs[1], &cpuinf[1].regs[2], &cpuinf[1].regs[3]) &&
 143            __get_cpuid(0x80000004, &cpuinf[2].regs[0], &cpuinf[2].regs[1], &cpuinf[2].regs[2], &cpuinf[2].regs[3]))
 144             TRACE("Name: \"%.16s%.16s%.16s\"\n", cpuinf[0].str, cpuinf[1].str, cpuinf[2].str);
 145
 146         if(maxfunc >= 1 &&
 147            __get_cpuid(1, &cpuinf[0].regs[0], &cpuinf[0].regs[1], &cpuinf[0].regs[2], &cpuinf[0].regs[3]))
 148         {
 149             if((cpuinf[0].regs[3]&(1<<25)))
 150             {
 151                 caps |= CPU_CAP_SSE;
 152                 if((cpuinf[0].regs[3]&(1<<26)))
 153                 {
 154                     caps |= CPU_CAP_SSE2;
 155                     if((cpuinf[0].regs[2]&(1<<0)))
 156                     {
 157                         caps |= CPU_CAP_SSE3;
 158                         if((cpuinf[0].regs[2]&(1<<19)))
 159                             caps |= CPU_CAP_SSE4_1;
 160                     }
 161                 }
 162             }
 163         }
 164     }
 165 #elif defined(HAVE_CPUID_INTRINSIC) && (defined(__i386__) || defined(__x86_64__) || \
 166                                         defined(_M_IX86) || defined(_M_X64))
 167     union {
 168         int regs[4];
 169         char str[sizeof(int[4])];
 170     } cpuinf[3];
 171
 172     (__cpuid)(cpuinf[0].regs, 0);
 173     if(cpuinf[0].regs[0] == 0)
 174         ERR("Failed to get CPUID\n");
 175     else
 176     {
 177         unsigned int maxfunc = cpuinf[0].regs[0];
 178         unsigned int maxextfunc;
 179
 180         (__cpuid)(cpuinf[0].regs, 0x80000000);
 181         maxextfunc = cpuinf[0].regs[0];
 182
 183         TRACE("Detected max CPUID function: 0x%x (ext. 0x%x)\n", maxfunc, maxextfunc);
 184
 185         TRACE("Vendor ID: \"%.4s%.4s%.4s\"\n", cpuinf[0].str+4, cpuinf[0].str+12, cpuinf[0].str+8);
 186         if(maxextfunc >= 0x80000004)
 187         {
 188             (__cpuid)(cpuinf[0].regs, 0x80000002);
 189             (__cpuid)(cpuinf[1].regs, 0x80000003);
 190             (__cpuid)(cpuinf[2].regs, 0x80000004);
 191             TRACE("Name: \"%.16s%.16s%.16s\"\n", cpuinf[0].str, cpuinf[1].str, cpuinf[2].str);
 192         }
 193
 194         if(maxfunc >= 1)
 195         {
 196             (__cpuid)(cpuinf[0].regs, 1);
 197             if((cpuinf[0].regs[3]&(1<<25)))
 198             {
 199                 caps |= CPU_CAP_SSE;
 200                 if((cpuinf[0].regs[3]&(1<<26)))
 201                 {
 202                     caps |= CPU_CAP_SSE2;
 203                     if((cpuinf[0].regs[2]&(1<<0)))
 204                     {
 205                         caps |= CPU_CAP_SSE3;
 206                         if((cpuinf[0].regs[2]&(1<<19)))
 207                             caps |= CPU_CAP_SSE4_1;
 208                     }
 209                 }
 210             }
 211         }
 212     }
 213 #else
 214     /* Assume support for whatever's supported if we can't check for it */
 215 #if defined(HAVE_SSE4_1)
 216 #warning "Assuming SSE 4.1 run-time support!"
 217     caps |= CPU_CAP_SSE | CPU_CAP_SSE2 | CPU_CAP_SSE3 | CPU_CAP_SSE4_1;
 218 #elif defined(HAVE_SSE3)
 219 #warning "Assuming SSE 3 run-time support!"
 220     caps |= CPU_CAP_SSE | CPU_CAP_SSE2 | CPU_CAP_SSE3;
 221 #elif defined(HAVE_SSE2)
 222 #warning "Assuming SSE 2 run-time support!"
 223     caps |= CPU_CAP_SSE | CPU_CAP_SSE2;
 224 #elif defined(HAVE_SSE)
 225 #warning "Assuming SSE run-time support!"
 226     caps |= CPU_CAP_SSE;
 227 #endif
 228 #endif
 229 #ifdef HAVE_NEON
 230     /* Assume Neon support if compiled with it */
 231     caps |= CPU_CAP_NEON;
 232 #endif
 233
 234     TRACE("Extensions:%s%s%s%s%s%s\n",
 235         ((capfilter&CPU_CAP_SSE)    ? ((caps&CPU_CAP_SSE)    ? " +SSE"    : " -SSE")    : ""),
 236         ((capfilter&CPU_CAP_SSE2)   ? ((caps&CPU_CAP_SSE2)   ? " +SSE2"   : " -SSE2")   : ""),
 237         ((capfilter&CPU_CAP_SSE3)   ? ((caps&CPU_CAP_SSE3)   ? " +SSE3"   : " -SSE3")   : ""),
 238         ((capfilter&CPU_CAP_SSE4_1) ? ((caps&CPU_CAP_SSE4_1) ? " +SSE4.1" : " -SSE4.1") : ""),
 239         ((capfilter&CPU_CAP_NEON)   ? ((caps&CPU_CAP_NEON)   ? " +Neon"   : " -Neon")   : ""),
 240         ((!capfilter) ? " -none-" : "")
 241     );
 242     CPUCapFlags = caps & capfilter;
 243 }
 244
 245
 246 void SetMixerFPUMode(FPUCtl *ctl)
 247 {
 248 #ifdef HAVE_FENV_H
 249     fegetenv(STATIC_CAST(fenv_t, ctl));
 250 #if defined(__GNUC__) && defined(HAVE_SSE)
 251     /* FIXME: Some fegetenv implementations can get the SSE environment too?
 252      * How to tell when it does? */
 253     if((CPUCapFlags&CPU_CAP_SSE))
 254         __asm__ __volatile__("stmxcsr %0" : "=m" (*&ctl->sse_state));
 255 #endif
 256
 257 #ifdef FE_TOWARDZERO
 258     fesetround(FE_TOWARDZERO);
 259 #endif
 260 #if defined(__GNUC__) && defined(HAVE_SSE)
 261     if((CPUCapFlags&CPU_CAP_SSE))
 262     {
 263         int sseState = ctl->sse_state;
 264         sseState |= 0x6000; /* set round-to-zero */
 265         sseState |= 0x8000; /* set flush-to-zero */
 266         if((CPUCapFlags&CPU_CAP_SSE2))
 267             sseState |= 0x0040; /* set denormals-are-zero */
 268         __asm__ __volatile__("ldmxcsr %0" : : "m" (*&sseState));
 269     }
 270 #endif
 271
 272 #elif defined(HAVE___CONTROL87_2)
 273
 274     int mode;
 275     __control87_2(0, 0, &ctl->state, NULL);
 276     __control87_2(_RC_CHOP, _MCW_RC, &mode, NULL);
 277 #ifdef HAVE_SSE
 278     if((CPUCapFlags&CPU_CAP_SSE))
 279     {
 280         __control87_2(0, 0, NULL, &ctl->sse_state);
 281         __control87_2(_RC_CHOP|_DN_FLUSH, _MCW_RC|_MCW_DN, NULL, &mode);
 282     }
 283 #endif
 284
 285 #elif defined(HAVE__CONTROLFP)
 286
 287     ctl->state = _controlfp(0, 0);
 288     (void)_controlfp(_RC_CHOP, _MCW_RC);
 289 #endif
 290 }
 291
 292 void RestoreFPUMode(const FPUCtl *ctl)
 293 {
 294 #ifdef HAVE_FENV_H
 295     fesetenv(STATIC_CAST(fenv_t, ctl));
 296 #if defined(__GNUC__) && defined(HAVE_SSE)
 297     if((CPUCapFlags&CPU_CAP_SSE))
 298         __asm__ __volatile__("ldmxcsr %0" : : "m" (*&ctl->sse_state));
 299 #endif
 300
 301 #elif defined(HAVE___CONTROL87_2)
 302
 303     int mode;
 304     __control87_2(ctl->state, _MCW_RC, &mode, NULL);
 305 #ifdef HAVE_SSE
 306     if((CPUCapFlags&CPU_CAP_SSE))
 307         __control87_2(ctl->sse_state, _MCW_RC|_MCW_DN, NULL, &mode);
 308 #endif
 309
 310 #elif defined(HAVE__CONTROLFP)
 311
 312     _controlfp(ctl->state, _MCW_RC);
 313 #endif
 314 }
 315
 316
 317 static int StringSortCompare(const void *str1, const void *str2)
 318 {
 319     return al_string_cmp(*(const_al_string*)str1, *(const_al_string*)str2);
 320 }
 321
 322 #ifdef _WIN32
 323
 324 static WCHAR *FromUTF8(const char *str)
 325 {
 326     WCHAR *out = NULL;
 327     int len;
 328
 329     if((len=MultiByteToWideChar(CP_UTF8, 0, str, -1, NULL, 0)) > 0)
 330     {
 331         out = calloc(sizeof(WCHAR), len);
 332         MultiByteToWideChar(CP_UTF8, 0, str, -1, out, len);
 333     }
 334     return out;
 335 }
 336
 337
 338 void *LoadLib(const char *name)
 339 {
 340     HANDLE hdl = NULL;
 341     WCHAR *wname;
 342
 343     wname = FromUTF8(name);
 344     if(!wname)
 345         ERR("Failed to convert UTF-8 filename: \"%s\"\n", name);
 346     else
 347     {
 348         hdl = LoadLibraryW(wname);
 349         free(wname);
 350     }
 351     return hdl;
 352 }
 353 void CloseLib(void *handle)
 354 { FreeLibrary((HANDLE)handle); }
 355 void *GetSymbol(void *handle, const char *name)
 356 {
 357     void *ret;
 358
 359     ret = (void*)GetProcAddress((HANDLE)handle, name);
 360     if(ret == NULL)
 361         ERR("Failed to load %s\n", name);
 362     return ret;
 363 }
 364
 365 WCHAR *strdupW(const WCHAR *str)
 366 {
 367     const WCHAR *n;
 368     WCHAR *ret;
 369     size_t len;
 370
 371     n = str;
 372     while(*n) n++;
 373     len = n - str;
 374
 375     ret = calloc(sizeof(WCHAR), len+1);
 376     if(ret != NULL)
 377         memcpy(ret, str, sizeof(WCHAR)*len);
 378     return ret;
 379 }
 380
 381 FILE *al_fopen(const char *fname, const char *mode)
 382 {
 383     WCHAR *wname=NULL, *wmode=NULL;
 384     FILE *file = NULL;
 385
 386     wname = FromUTF8(fname);
 387     wmode = FromUTF8(mode);
 388     if(!wname)
 389         ERR("Failed to convert UTF-8 filename: \"%s\"\n", fname);
 390     else if(!wmode)
 391         ERR("Failed to convert UTF-8 mode: \"%s\"\n", mode);
 392     else
 393         file = _wfopen(wname, wmode);
 394
 395     free(wname);
 396     free(wmode);
 397
 398     return file;
 399 }
 400
 401
 402 void al_print(const char *type, const char *func, const char *fmt, ...)
 403 {
 404     char str[1024];
 405     WCHAR *wstr;
 406     va_list ap;
 407
 408     va_start(ap, fmt);
 409     vsnprintf(str, sizeof(str), fmt, ap);
 410     va_end(ap);
 411
 412     str[sizeof(str)-1] = 0;
 413     wstr = FromUTF8(str);
 414     if(!wstr)
 415         fprintf(LogFile, "AL lib: %s %s: <UTF-8 error> %s", type, func, str);
 416     else
 417     {
 418         fprintf(LogFile, "AL lib: %s %s: %ls", type, func, wstr);
 419         free(wstr);
 420         wstr = NULL;
 421     }
 422     fflush(LogFile);
 423 }
 424
 425
 426 static inline int is_slash(int c)
 427 { return (c == '\\' || c == '/'); }
 428
 429 static void DirectorySearch(const char *path, const char *ext, vector_al_string *results)
 430 {
 431     al_string pathstr = AL_STRING_INIT_STATIC();
 432     WIN32_FIND_DATAW fdata;
 433     WCHAR *wpath;
 434     HANDLE hdl;
 435
 436     al_string_copy_cstr(&pathstr, path);
 437     al_string_append_cstr(&pathstr, "\\*");
 438     al_string_append_cstr(&pathstr, ext);
 439
 440     TRACE("Searching %s\n", al_string_get_cstr(pathstr));
 441
 442     wpath = FromUTF8(al_string_get_cstr(pathstr));
 443
 444     hdl = FindFirstFileW(wpath, &fdata);
 445     if(hdl != INVALID_HANDLE_VALUE)
 446     {
 447         size_t base = VECTOR_SIZE(*results);
 448         do {
 449             al_string str = AL_STRING_INIT_STATIC();
 450             al_string_copy_cstr(&str, path);
 451             al_string_append_char(&str, '\\');
 452             al_string_append_wcstr(&str, fdata.cFileName);
 453             TRACE("Got result %s\n", al_string_get_cstr(str));
 454             VECTOR_PUSH_BACK(*results, str);
 455         } while(FindNextFileW(hdl, &fdata));
 456         FindClose(hdl);
 457
 458         if(VECTOR_SIZE(*results) > base)
 459             qsort(VECTOR_BEGIN(*results)+base, VECTOR_SIZE(*results)-base,
 460                     sizeof(VECTOR_FRONT(*results)), StringSortCompare);
 461     }
 462
 463     free(wpath);
 464     al_string_deinit(&pathstr);
 465 }
 466
 467 vector_al_string SearchDataFiles(const char *ext, const char *subdir)
 468 {
 469     static const int ids[2] = { CSIDL_APPDATA, CSIDL_COMMON_APPDATA };
 470     static RefCount search_lock;
 471     vector_al_string results = VECTOR_INIT_STATIC();
 472     size_t i;
 473
 474     while(ATOMIC_EXCHANGE(uint, &search_lock, 1) == 1)
 475         althrd_yield();
 476
 477     /* If the path is absolute, use it directly. */
 478     if(isalpha(subdir[0]) && subdir[1] == ':' && is_slash(subdir[2]))
 479     {
 480         al_string path = AL_STRING_INIT_STATIC();
 481         al_string_copy_cstr(&path, subdir);
 482 #define FIX_SLASH(i) do { if(*(i) == '/') *(i) = '\\'; } while(0)
 483         VECTOR_FOR_EACH(char, path, FIX_SLASH);
 484 #undef FIX_SLASH
 485
 486         DirectorySearch(al_string_get_cstr(path), ext, &results);
 487
 488         al_string_deinit(&path);
 489     }
 490     else if(subdir[0] == '\\' && subdir[1] == '\\' && subdir[2] == '?' && subdir[3] == '\\')
 491         DirectorySearch(subdir, ext, &results);
 492     else
 493     {
 494         al_string path = AL_STRING_INIT_STATIC();
 495         WCHAR *cwdbuf;
 496
 497         /* Search the app-local directory. */
 498         if((cwdbuf=_wgetenv(L"ALSOFT_LOCAL_PATH")) && *cwdbuf != '\0')
 499         {
 500             al_string_copy_wcstr(&path, cwdbuf);
 501             if(is_slash(VECTOR_BACK(path)))
 502             {
 503                 VECTOR_POP_BACK(path);
 504                 *VECTOR_END(path) = 0;
 505             }
 506         }
 507         else if(!(cwdbuf=_wgetcwd(NULL, 0)))
 508             al_string_copy_cstr(&path, ".");
 509         else
 510         {
 511             al_string_copy_wcstr(&path, cwdbuf);
 512             if(is_slash(VECTOR_BACK(path)))
 513             {
 514                 VECTOR_POP_BACK(path);
 515                 *VECTOR_END(path) = 0;
 516             }
 517             free(cwdbuf);
 518         }
 519 #define FIX_SLASH(i) do { if(*(i) == '/') *(i) = '\\'; } while(0)
 520         VECTOR_FOR_EACH(char, path, FIX_SLASH);
 521 #undef FIX_SLASH
 522         DirectorySearch(al_string_get_cstr(path), ext, &results);
 523
 524         /* Search the local and global data dirs. */
 525         for(i = 0;i < COUNTOF(ids);i++)
 526         {
 527             WCHAR buffer[PATH_MAX];
 528             if(SHGetSpecialFolderPathW(NULL, buffer, ids[i], FALSE) != FALSE)
 529             {
 530                 al_string_copy_wcstr(&path, buffer);
 531                 if(!is_slash(VECTOR_BACK(path)))
 532                     al_string_append_char(&path, '\\');
 533                 al_string_append_cstr(&path, subdir);
 534 #define FIX_SLASH(i) do { if(*(i) == '/') *(i) = '\\'; } while(0)
 535                 VECTOR_FOR_EACH(char, path, FIX_SLASH);
 536 #undef FIX_SLASH
 537
 538                 DirectorySearch(al_string_get_cstr(path), ext, &results);
 539             }
 540         }
 541
 542         al_string_deinit(&path);
 543     }
 544
 545     ATOMIC_STORE(&search_lock, 0);
 546
 547     return results;
 548 }
 549
 550 #else
 551
 552 #ifdef HAVE_DLFCN_H
 553
 554 void *LoadLib(const char *name)
 555 {
 556     const char *err;
 557     void *handle;
 558
 559     dlerror();
 560     handle = dlopen(name, RTLD_NOW);
 561     if((err=dlerror()) != NULL)
 562         handle = NULL;
 563     return handle;
 564 }
 565 void CloseLib(void *handle)
 566 { dlclose(handle); }
 567 void *GetSymbol(void *handle, const char *name)
 568 {
 569     const char *err;
 570     void *sym;
 571
 572     dlerror();
 573     sym = dlsym(handle, name);
 574     if((err=dlerror()) != NULL)
 575     {
 576         WARN("Failed to load %s: %s\n", name, err);
 577         sym = NULL;
 578     }
 579     return sym;
 580 }
 581
 582 #endif /* HAVE_DLFCN_H */
 583
 584 void al_print(const char *type, const char *func, const char *fmt, ...)
 585 {
 586     va_list ap;
 587
 588     va_start(ap, fmt);
 589     fprintf(LogFile, "AL lib: %s %s: ", type, func);
 590     vfprintf(LogFile, fmt, ap);
 591     va_end(ap);
 592
 593     fflush(LogFile);
 594 }
 595
 596
 597 static void DirectorySearch(const char *path, const char *ext, vector_al_string *results)
 598 {
 599     size_t extlen = strlen(ext);
 600     DIR *dir;
 601
 602     TRACE("Searching %s for *%s\n", path, ext);
 603     dir = opendir(path);
 604     if(dir != NULL)
 605     {
 606         size_t base = VECTOR_SIZE(*results);
 607         struct dirent *dirent;
 608         while((dirent=readdir(dir)) != NULL)
 609         {
 610             al_string str;
 611             size_t len;
 612             if(strcmp(dirent->d_name, ".") == 0 || strcmp(dirent->d_name, "..") == 0)
 613                 continue;
 614
 615             len = strlen(dirent->d_name);
 616             if(!(len > extlen))
 617                 continue;
 618             if(strcasecmp(dirent->d_name+len-extlen, ext) != 0)
 619                 continue;
 620
 621             AL_STRING_INIT(str);
 622             al_string_copy_cstr(&str, path);
 623             if(VECTOR_BACK(str) != '/')
 624                 al_string_append_char(&str, '/');
 625             al_string_append_cstr(&str, dirent->d_name);
 626             TRACE("Got result %s\n", al_string_get_cstr(str));
 627             VECTOR_PUSH_BACK(*results, str);
 628         }
 629         closedir(dir);
 630
 631         if(VECTOR_SIZE(*results) > base)
 632             qsort(VECTOR_BEGIN(*results)+base, VECTOR_SIZE(*results)-base,
 633                   sizeof(VECTOR_FRONT(*results)), StringSortCompare);
 634     }
 635 }
 636
 637 vector_al_string SearchDataFiles(const char *ext, const char *subdir)
 638 {
 639     static RefCount search_lock;
 640     vector_al_string results = VECTOR_INIT_STATIC();
 641
 642     while(ATOMIC_EXCHANGE(uint, &search_lock, 1) == 1)
 643         althrd_yield();
 644
 645     if(subdir[0] == '/')
 646         DirectorySearch(subdir, ext, &results);
 647     else
 648     {
 649         al_string path = AL_STRING_INIT_STATIC();
 650         const char *str, *next;
 651         char cwdbuf[PATH_MAX];
 652
 653         /* Search the app-local directory. */
 654         if((str=getenv("ALSOFT_LOCAL_PATH")) && *str != '\0')
 655             DirectorySearch(str, ext, &results);
 656         else if(getcwd(cwdbuf, sizeof(cwdbuf)))
 657             DirectorySearch(cwdbuf, ext, &results);
 658         else
 659             DirectorySearch(".", ext, &results);
 660
 661         // Search local data dir
 662         if((str=getenv("XDG_DATA_HOME")) != NULL && str[0] != '\0')
 663         {
 664             al_string_copy_cstr(&path, str);
 665             if(VECTOR_BACK(path) != '/')
 666                 al_string_append_char(&path, '/');
 667             al_string_append_cstr(&path, subdir);
 668             DirectorySearch(al_string_get_cstr(path), ext, &results);
 669         }
 670         else if((str=getenv("HOME")) != NULL && str[0] != '\0')
 671         {
 672             al_string_copy_cstr(&path, str);
 673             if(VECTOR_BACK(path) == '/')
 674             {
 675                 VECTOR_POP_BACK(path);
 676                 *VECTOR_END(path) = 0;
 677             }
 678             al_string_append_cstr(&path, "/.local/share/");
 679             al_string_append_cstr(&path, subdir);
 680             DirectorySearch(al_string_get_cstr(path), ext, &results);
 681         }
 682
 683         // Search global data dirs
 684         if((str=getenv("XDG_DATA_DIRS")) == NULL || str[0] == '\0')
 685             str = "/usr/local/share/:/usr/share/";
 686
 687         next = str;
 688         while((str=next) != NULL && str[0] != '\0')
 689         {
 690             next = strchr(str, ':');
 691             if(!next)
 692                 al_string_copy_cstr(&path, str);
 693             else
 694             {
 695                 al_string_copy_range(&path, str, next);
 696                 ++next;
 697             }
 698             if(!al_string_empty(path))
 699             {
 700                 if(VECTOR_BACK(path) != '/')
 701                     al_string_append_char(&path, '/');
 702                 al_string_append_cstr(&path, subdir);
 703
 704                 DirectorySearch(al_string_get_cstr(path), ext, &results);
 705             }
 706         }
 707
 708         al_string_deinit(&path);
 709     }
 710
 711     ATOMIC_STORE(&search_lock, 0);
 712
 713     return results;
 714 }
 715
 716 #endif
 717
 718
 719 void SetRTPriority(void)
 720 {
 721     ALboolean failed = AL_FALSE;
 722
 723 #ifdef _WIN32
 724     if(RTPrioLevel > 0)
 725         failed = !SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_TIME_CRITICAL);
 726 #elif defined(HAVE_PTHREAD_SETSCHEDPARAM) && !defined(__OpenBSD__)
 727     if(RTPrioLevel > 0)
 728     {
 729         struct sched_param param;
 730         /* Use the minimum real-time priority possible for now (on Linux this
 731          * should be 1 for SCHED_RR) */
 732         param.sched_priority = sched_get_priority_min(SCHED_RR);
 733         failed = !!pthread_setschedparam(pthread_self(), SCHED_RR, &param);
 734     }
 735 #else
 736     /* Real-time priority not available */
 737     failed = (RTPrioLevel>0);
 738 #endif
 739     if(failed)
 740         ERR("Failed to set priority level for thread\n");
 741 }
 742
 743
 744 ALboolean vector_reserve(char *ptr, size_t base_size, size_t obj_size, size_t obj_count, ALboolean exact)
 745 {
 746     vector_ *vecptr = (vector_*)ptr;
 747     if((*vecptr ? (*vecptr)->Capacity : 0) < obj_count)
 748     {
 749         size_t old_size = (*vecptr ? (*vecptr)->Size : 0);
 750         void *temp;
 751
 752         /* Use the next power-of-2 size if we don't need to allocate the exact
 753          * amount. This is preferred when regularly increasing the vector since
 754          * it means fewer reallocations. Though it means it also wastes some
 755          * memory. */
 756         if(exact == AL_FALSE && obj_count < INT_MAX)
 757             obj_count = NextPowerOf2((ALuint)obj_count);
 758
 759         /* Need to be explicit with the caller type's base size, because it
 760          * could have extra padding before the start of the array (that is,
 761          * sizeof(*vector_) may not equal base_size). */
 762         temp = realloc(*vecptr, base_size + obj_size*obj_count);
 763         if(temp == NULL) return AL_FALSE;
 764
 765         *vecptr = temp;
 766         (*vecptr)->Capacity = obj_count;
 767         (*vecptr)->Size = old_size;
 768     }
 769     return AL_TRUE;
 770 }
 771
 772 ALboolean vector_resize(char *ptr, size_t base_size, size_t obj_size, size_t obj_count)
 773 {
 774     vector_ *vecptr = (vector_*)ptr;
 775     if(*vecptr || obj_count > 0)
 776     {
 777         if(!vector_reserve((char*)vecptr, base_size, obj_size, obj_count, AL_TRUE))
 778             return AL_FALSE;
 779         (*vecptr)->Size = obj_count;
 780     }
 781     return AL_TRUE;
 782 }
 783
 784 ALboolean vector_insert(char *ptr, size_t base_size, size_t obj_size, void *ins_pos, const void *datstart, const void *datend)
 785 {
 786     vector_ *vecptr = (vector_*)ptr;
 787     if(datstart != datend)
 788     {
 789         ptrdiff_t ins_elem = (*vecptr ? ((char*)ins_pos - ((char*)(*vecptr) + base_size)) :
 790                                         ((char*)ins_pos - (char*)NULL)) /
 791                              obj_size;
 792         ptrdiff_t numins = ((const char*)datend - (const char*)datstart) / obj_size;
 793
 794         assert(numins > 0);
 795         if((size_t)numins + VECTOR_SIZE(*vecptr) < (size_t)numins ||
 796            !vector_reserve((char*)vecptr, base_size, obj_size, VECTOR_SIZE(*vecptr)+numins, AL_TRUE))
 797             return AL_FALSE;
 798
 799         /* NOTE: ins_pos may have been invalidated if *vecptr moved. Use ins_elem instead. */
 800         if((size_t)ins_elem < (*vecptr)->Size)
 801         {
 802             memmove((char*)(*vecptr) + base_size + ((ins_elem+numins)*obj_size),
 803                     (char*)(*vecptr) + base_size + ((ins_elem       )*obj_size),
 804                     ((*vecptr)->Size-ins_elem)*obj_size);
 805         }
 806         memcpy((char*)(*vecptr) + base_size + (ins_elem*obj_size),
 807                datstart, numins*obj_size);
 808         (*vecptr)->Size += numins;
 809     }
 810     return AL_TRUE;
 811 }
 812
 813
 814 extern inline void al_string_deinit(al_string *str);
 815 extern inline size_t al_string_length(const_al_string str);
 816 extern inline ALboolean al_string_empty(const_al_string str);
 817 extern inline const al_string_char_type *al_string_get_cstr(const_al_string str);
 818
 819 void al_string_clear(al_string *str)
 820 {
 821     if(!al_string_empty(*str))
 822     {
 823         /* Reserve one more character than the total size of the string. This
 824          * is to ensure we have space to add a null terminator in the string
 825          * data so it can be used as a C-style string.
 826          */
 827         VECTOR_RESERVE(*str, 1);
 828         VECTOR_RESIZE(*str, 0);
 829         *VECTOR_END(*str) = 0;
 830     }
 831 }
 832
 833 static inline int al_string_compare(const al_string_char_type *str1, size_t str1len,
 834                                     const al_string_char_type *str2, size_t str2len)
 835 {
 836     size_t complen = (str1len < str2len) ? str1len : str2len;
 837     int ret = memcmp(str1, str2, complen);
 838     if(ret == 0)
 839     {
 840         if(str1len > str2len) return  1;
 841         if(str1len < str2len) return -1;
 842     }
 843     return ret;
 844 }
 845 int al_string_cmp(const_al_string str1, const_al_string str2)
 846 {
 847     return al_string_compare(&VECTOR_FRONT(str1), al_string_length(str1),
 848                              &VECTOR_FRONT(str2), al_string_length(str2));
 849 }
 850 int al_string_cmp_cstr(const_al_string str1, const al_string_char_type *str2)
 851 {
 852     return al_string_compare(&VECTOR_FRONT(str1), al_string_length(str1),
 853                              str2, strlen(str2));
 854 }
 855
 856 void al_string_copy(al_string *str, const_al_string from)
 857 {
 858     size_t len = al_string_length(from);
 859     VECTOR_RESERVE(*str, len+1);
 860     VECTOR_RESIZE(*str, 0);
 861     VECTOR_INSERT(*str, VECTOR_END(*str), VECTOR_BEGIN(from), VECTOR_BEGIN(from)+len);
 862     *VECTOR_END(*str) = 0;
 863 }
 864
 865 void al_string_copy_cstr(al_string *str, const al_string_char_type *from)
 866 {
 867     size_t len = strlen(from);
 868     VECTOR_RESERVE(*str, len+1);
 869     VECTOR_RESIZE(*str, 0);
 870     VECTOR_INSERT(*str, VECTOR_END(*str), from, from+len);
 871     *VECTOR_END(*str) = 0;
 872 }
 873
 874 void al_string_copy_range(al_string *str, const al_string_char_type *from, const al_string_char_type *to)
 875 {
 876     size_t len = to - from;
 877     VECTOR_RESERVE(*str, len+1);
 878     VECTOR_RESIZE(*str, 0);
 879     VECTOR_INSERT(*str, VECTOR_END(*str), from, to);
 880     *VECTOR_END(*str) = 0;
 881 }
 882
 883 void al_string_append_char(al_string *str, const al_string_char_type c)
 884 {
 885     VECTOR_RESERVE(*str, al_string_length(*str)+2);
 886     VECTOR_PUSH_BACK(*str, c);
 887     *VECTOR_END(*str) = 0;
 888 }
 889
 890 void al_string_append_cstr(al_string *str, const al_string_char_type *from)
 891 {
 892     size_t len = strlen(from);
 893     if(len != 0)
 894     {
 895         VECTOR_RESERVE(*str, al_string_length(*str)+len+1);
 896         VECTOR_INSERT(*str, VECTOR_END(*str), from, from+len);
 897         *VECTOR_END(*str) = 0;
 898     }
 899 }
 900
 901 void al_string_append_range(al_string *str, const al_string_char_type *from, const al_string_char_type *to)
 902 {
 903     if(to != from)
 904     {
 905         VECTOR_RESERVE(*str, al_string_length(*str)+(to-from)+1);
 906         VECTOR_INSERT(*str, VECTOR_END(*str), from, to);
 907         *VECTOR_END(*str) = 0;
 908     }
 909 }
 910
 911 #ifdef _WIN32
 912 void al_string_copy_wcstr(al_string *str, const wchar_t *from)
 913 {
 914     int len;
 915     if((len=WideCharToMultiByte(CP_UTF8, 0, from, -1, NULL, 0, NULL, NULL)) > 0)
 916     {
 917         VECTOR_RESERVE(*str, len);
 918         VECTOR_RESIZE(*str, len-1);
 919         WideCharToMultiByte(CP_UTF8, 0, from, -1, &VECTOR_FRONT(*str), len, NULL, NULL);
 920         *VECTOR_END(*str) = 0;
 921     }
 922 }
 923
 924 void al_string_append_wcstr(al_string *str, const wchar_t *from)
 925 {
 926     int len;
 927     if((len=WideCharToMultiByte(CP_UTF8, 0, from, -1, NULL, 0, NULL, NULL)) > 0)
 928     {
 929         size_t strlen = al_string_length(*str);
 930         VECTOR_RESERVE(*str, strlen+len);
 931         VECTOR_RESIZE(*str, strlen+len-1);
 932         WideCharToMultiByte(CP_UTF8, 0, from, -1, &VECTOR_FRONT(*str) + strlen, len, NULL, NULL);
 933         *VECTOR_END(*str) = 0;
 934     }
 935 }
 936
 937 void al_string_append_wrange(al_string *str, const wchar_t *from, const wchar_t *to)
 938 {
 939     int len;
 940     if((len=WideCharToMultiByte(CP_UTF8, 0, from, (int)(to-from), NULL, 0, NULL, NULL)) > 0)
 941     {
 942         size_t strlen = al_string_length(*str);
 943         VECTOR_RESERVE(*str, strlen+len+1);
 944         VECTOR_RESIZE(*str, strlen+len);
 945         WideCharToMultiByte(CP_UTF8, 0, from, (int)(to-from), &VECTOR_FRONT(*str) + strlen, len+1, NULL, NULL);
 946         *VECTOR_END(*str) = 0;
 947     }
 948 }
 949 #endif