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-rw-r--r--Alc/helpers.cpp1027
1 files changed, 1027 insertions, 0 deletions
diff --git a/Alc/helpers.cpp b/Alc/helpers.cpp
new file mode 100644
index 00000000..abd010e6
--- /dev/null
+++ b/Alc/helpers.cpp
@@ -0,0 +1,1027 @@
+/**
+ * OpenAL cross platform audio library
+ * Copyright (C) 2011 by authors.
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ * Or go to http://www.gnu.org/copyleft/lgpl.html
+ */
+
+#ifdef _WIN32
+#ifdef __MINGW32__
+#define _WIN32_IE 0x501
+#else
+#define _WIN32_IE 0x400
+#endif
+#endif
+
+#include "config.h"
+
+#include <stdlib.h>
+#include <time.h>
+#include <errno.h>
+#include <stdarg.h>
+#include <ctype.h>
+#ifdef HAVE_MALLOC_H
+#include <malloc.h>
+#endif
+#ifdef HAVE_DIRENT_H
+#include <dirent.h>
+#endif
+#ifdef HAVE_PROC_PIDPATH
+#include <libproc.h>
+#endif
+
+#ifdef __FreeBSD__
+#include <sys/types.h>
+#include <sys/sysctl.h>
+#endif
+
+#ifndef AL_NO_UID_DEFS
+#if defined(HAVE_GUIDDEF_H) || defined(HAVE_INITGUID_H)
+#define INITGUID
+#include <windows.h>
+#ifdef HAVE_GUIDDEF_H
+#include <guiddef.h>
+#else
+#include <initguid.h>
+#endif
+
+DEFINE_GUID(KSDATAFORMAT_SUBTYPE_PCM, 0x00000001, 0x0000, 0x0010, 0x80,0x00, 0x00,0xaa,0x00,0x38,0x9b,0x71);
+DEFINE_GUID(KSDATAFORMAT_SUBTYPE_IEEE_FLOAT, 0x00000003, 0x0000, 0x0010, 0x80,0x00, 0x00,0xaa,0x00,0x38,0x9b,0x71);
+
+DEFINE_GUID(IID_IDirectSoundNotify, 0xb0210783, 0x89cd, 0x11d0, 0xaf,0x08, 0x00,0xa0,0xc9,0x25,0xcd,0x16);
+
+DEFINE_GUID(CLSID_MMDeviceEnumerator, 0xbcde0395, 0xe52f, 0x467c, 0x8e,0x3d, 0xc4,0x57,0x92,0x91,0x69,0x2e);
+DEFINE_GUID(IID_IMMDeviceEnumerator, 0xa95664d2, 0x9614, 0x4f35, 0xa7,0x46, 0xde,0x8d,0xb6,0x36,0x17,0xe6);
+DEFINE_GUID(IID_IAudioClient, 0x1cb9ad4c, 0xdbfa, 0x4c32, 0xb1,0x78, 0xc2,0xf5,0x68,0xa7,0x03,0xb2);
+DEFINE_GUID(IID_IAudioRenderClient, 0xf294acfc, 0x3146, 0x4483, 0xa7,0xbf, 0xad,0xdc,0xa7,0xc2,0x60,0xe2);
+DEFINE_GUID(IID_IAudioCaptureClient, 0xc8adbd64, 0xe71e, 0x48a0, 0xa4,0xde, 0x18,0x5c,0x39,0x5c,0xd3,0x17);
+
+#ifdef HAVE_WASAPI
+#include <wtypes.h>
+#include <devpropdef.h>
+#include <propkeydef.h>
+DEFINE_DEVPROPKEY(DEVPKEY_Device_FriendlyName, 0xa45c254e, 0xdf1c, 0x4efd, 0x80,0x20, 0x67,0xd1,0x46,0xa8,0x50,0xe0, 14);
+DEFINE_PROPERTYKEY(PKEY_AudioEndpoint_FormFactor, 0x1da5d803, 0xd492, 0x4edd, 0x8c,0x23, 0xe0,0xc0,0xff,0xee,0x7f,0x0e, 0);
+DEFINE_PROPERTYKEY(PKEY_AudioEndpoint_GUID, 0x1da5d803, 0xd492, 0x4edd, 0x8c, 0x23,0xe0, 0xc0,0xff,0xee,0x7f,0x0e, 4 );
+#endif
+#endif
+#endif /* AL_NO_UID_DEFS */
+
+#ifdef HAVE_DLFCN_H
+#include <dlfcn.h>
+#endif
+#ifdef HAVE_INTRIN_H
+#include <intrin.h>
+#endif
+#ifdef HAVE_CPUID_H
+#include <cpuid.h>
+#endif
+#ifdef HAVE_SYS_SYSCONF_H
+#include <sys/sysconf.h>
+#endif
+#ifdef HAVE_FLOAT_H
+#include <float.h>
+#endif
+#ifdef HAVE_IEEEFP_H
+#include <ieeefp.h>
+#endif
+
+#ifndef _WIN32
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+#include <fcntl.h>
+#include <unistd.h>
+#elif defined(_WIN32_IE)
+#include <shlobj.h>
+#endif
+
+#include "alMain.h"
+#include "alu.h"
+#include "cpu_caps.h"
+#include "fpu_modes.h"
+#include "atomic.h"
+#include "uintmap.h"
+#include "vector.h"
+#include "alstring.h"
+#include "compat.h"
+#include "threads.h"
+
+
+#if defined(HAVE_GCC_GET_CPUID) && (defined(__i386__) || defined(__x86_64__) || \
+ defined(_M_IX86) || defined(_M_X64))
+typedef unsigned int reg_type;
+static inline void get_cpuid(int f, reg_type *regs)
+{ __get_cpuid(f, &regs[0], &regs[1], &regs[2], &regs[3]); }
+#define CAN_GET_CPUID
+#elif defined(HAVE_CPUID_INTRINSIC) && (defined(__i386__) || defined(__x86_64__) || \
+ defined(_M_IX86) || defined(_M_X64))
+typedef int reg_type;
+static inline void get_cpuid(int f, reg_type *regs)
+{ (__cpuid)(regs, f); }
+#define CAN_GET_CPUID
+#endif
+
+int CPUCapFlags = 0;
+
+void FillCPUCaps(int capfilter)
+{
+ int caps = 0;
+
+/* FIXME: We really should get this for all available CPUs in case different
+ * CPUs have different caps (is that possible on one machine?). */
+#ifdef CAN_GET_CPUID
+ union {
+ reg_type regs[4];
+ char str[sizeof(reg_type[4])];
+ } cpuinf[3] = {{ { 0, 0, 0, 0 } }};
+
+ get_cpuid(0, cpuinf[0].regs);
+ if(cpuinf[0].regs[0] == 0)
+ ERR("Failed to get CPUID\n");
+ else
+ {
+ unsigned int maxfunc = cpuinf[0].regs[0];
+ unsigned int maxextfunc;
+
+ get_cpuid(0x80000000, cpuinf[0].regs);
+ maxextfunc = cpuinf[0].regs[0];
+
+ TRACE("Detected max CPUID function: 0x%x (ext. 0x%x)\n", maxfunc, maxextfunc);
+
+ TRACE("Vendor ID: \"%.4s%.4s%.4s\"\n", cpuinf[0].str+4, cpuinf[0].str+12, cpuinf[0].str+8);
+ if(maxextfunc >= 0x80000004)
+ {
+ get_cpuid(0x80000002, cpuinf[0].regs);
+ get_cpuid(0x80000003, cpuinf[1].regs);
+ get_cpuid(0x80000004, cpuinf[2].regs);
+ TRACE("Name: \"%.16s%.16s%.16s\"\n", cpuinf[0].str, cpuinf[1].str, cpuinf[2].str);
+ }
+
+ if(maxfunc >= 1)
+ {
+ get_cpuid(1, cpuinf[0].regs);
+ if((cpuinf[0].regs[3]&(1<<25)))
+ caps |= CPU_CAP_SSE;
+ if((caps&CPU_CAP_SSE) && (cpuinf[0].regs[3]&(1<<26)))
+ caps |= CPU_CAP_SSE2;
+ if((caps&CPU_CAP_SSE2) && (cpuinf[0].regs[2]&(1<<0)))
+ caps |= CPU_CAP_SSE3;
+ if((caps&CPU_CAP_SSE3) && (cpuinf[0].regs[2]&(1<<19)))
+ caps |= CPU_CAP_SSE4_1;
+ }
+ }
+#else
+ /* Assume support for whatever's supported if we can't check for it */
+#if defined(HAVE_SSE4_1)
+#warning "Assuming SSE 4.1 run-time support!"
+ caps |= CPU_CAP_SSE | CPU_CAP_SSE2 | CPU_CAP_SSE3 | CPU_CAP_SSE4_1;
+#elif defined(HAVE_SSE3)
+#warning "Assuming SSE 3 run-time support!"
+ caps |= CPU_CAP_SSE | CPU_CAP_SSE2 | CPU_CAP_SSE3;
+#elif defined(HAVE_SSE2)
+#warning "Assuming SSE 2 run-time support!"
+ caps |= CPU_CAP_SSE | CPU_CAP_SSE2;
+#elif defined(HAVE_SSE)
+#warning "Assuming SSE run-time support!"
+ caps |= CPU_CAP_SSE;
+#endif
+#endif
+#ifdef HAVE_NEON
+ FILE *file = fopen("/proc/cpuinfo", "rt");
+ if(!file)
+ ERR("Failed to open /proc/cpuinfo, cannot check for NEON support\n");
+ else
+ {
+ al_string features = AL_STRING_INIT_STATIC();
+ char buf[256];
+
+ while(fgets(buf, sizeof(buf), file) != NULL)
+ {
+ if(strncmp(buf, "Features\t:", 10) != 0)
+ continue;
+
+ alstr_copy_cstr(&features, buf+10);
+ while(VECTOR_BACK(features) != '\n')
+ {
+ if(fgets(buf, sizeof(buf), file) == NULL)
+ break;
+ alstr_append_cstr(&features, buf);
+ }
+ break;
+ }
+ fclose(file);
+ file = NULL;
+
+ if(!alstr_empty(features))
+ {
+ const char *str = alstr_get_cstr(features);
+ while(isspace(str[0])) ++str;
+
+ TRACE("Got features string:%s\n", str);
+ while((str=strstr(str, "neon")) != NULL)
+ {
+ if(isspace(*(str-1)) && (str[4] == 0 || isspace(str[4])))
+ {
+ caps |= CPU_CAP_NEON;
+ break;
+ }
+ ++str;
+ }
+ }
+
+ alstr_reset(&features);
+ }
+#endif
+
+ TRACE("Extensions:%s%s%s%s%s%s\n",
+ ((capfilter&CPU_CAP_SSE) ? ((caps&CPU_CAP_SSE) ? " +SSE" : " -SSE") : ""),
+ ((capfilter&CPU_CAP_SSE2) ? ((caps&CPU_CAP_SSE2) ? " +SSE2" : " -SSE2") : ""),
+ ((capfilter&CPU_CAP_SSE3) ? ((caps&CPU_CAP_SSE3) ? " +SSE3" : " -SSE3") : ""),
+ ((capfilter&CPU_CAP_SSE4_1) ? ((caps&CPU_CAP_SSE4_1) ? " +SSE4.1" : " -SSE4.1") : ""),
+ ((capfilter&CPU_CAP_NEON) ? ((caps&CPU_CAP_NEON) ? " +NEON" : " -NEON") : ""),
+ ((!capfilter) ? " -none-" : "")
+ );
+ CPUCapFlags = caps & capfilter;
+}
+
+
+void SetMixerFPUMode(FPUCtl *ctl)
+{
+#if defined(__GNUC__) && defined(HAVE_SSE)
+ if((CPUCapFlags&CPU_CAP_SSE))
+ {
+ __asm__ __volatile__("stmxcsr %0" : "=m" (*&ctl->sse_state));
+ unsigned int sseState = ctl->sse_state;
+ sseState |= 0x8000; /* set flush-to-zero */
+ if((CPUCapFlags&CPU_CAP_SSE2))
+ sseState |= 0x0040; /* set denormals-are-zero */
+ __asm__ __volatile__("ldmxcsr %0" : : "m" (*&sseState));
+ }
+
+#elif defined(HAVE___CONTROL87_2)
+
+ __control87_2(0, 0, &ctl->state, &ctl->sse_state);
+ _control87(_DN_FLUSH, _MCW_DN);
+
+#elif defined(HAVE__CONTROLFP)
+
+ ctl->state = _controlfp(0, 0);
+ _controlfp(_DN_FLUSH, _MCW_DN);
+#endif
+}
+
+void RestoreFPUMode(const FPUCtl *ctl)
+{
+#if defined(__GNUC__) && defined(HAVE_SSE)
+ if((CPUCapFlags&CPU_CAP_SSE))
+ __asm__ __volatile__("ldmxcsr %0" : : "m" (*&ctl->sse_state));
+
+#elif defined(HAVE___CONTROL87_2)
+
+ int mode;
+ __control87_2(ctl->state, _MCW_DN, &mode, NULL);
+ __control87_2(ctl->sse_state, _MCW_DN, NULL, &mode);
+
+#elif defined(HAVE__CONTROLFP)
+
+ _controlfp(ctl->state, _MCW_DN);
+#endif
+}
+
+
+static int StringSortCompare(const void *str1, const void *str2)
+{
+ return alstr_cmp(*(const_al_string*)str1, *(const_al_string*)str2);
+}
+
+#ifdef _WIN32
+
+static WCHAR *strrchrW(WCHAR *str, WCHAR ch)
+{
+ WCHAR *ret = NULL;
+ while(*str)
+ {
+ if(*str == ch)
+ ret = str;
+ ++str;
+ }
+ return ret;
+}
+
+void GetProcBinary(al_string *path, al_string *fname)
+{
+ WCHAR *pathname, *sep;
+ DWORD pathlen;
+ DWORD len;
+
+ pathlen = 256;
+ pathname = static_cast<WCHAR*>(malloc(pathlen * sizeof(pathname[0])));
+ while(pathlen > 0 && (len=GetModuleFileNameW(NULL, pathname, pathlen)) == pathlen)
+ {
+ free(pathname);
+ pathlen <<= 1;
+ pathname = static_cast<WCHAR*>(malloc(pathlen * sizeof(pathname[0])));
+ }
+ if(len == 0)
+ {
+ free(pathname);
+ ERR("Failed to get process name: error %lu\n", GetLastError());
+ return;
+ }
+
+ pathname[len] = 0;
+ if((sep=strrchrW(pathname, '\\')) != NULL)
+ {
+ WCHAR *sep2 = strrchrW(sep+1, '/');
+ if(sep2) sep = sep2;
+ }
+ else
+ sep = strrchrW(pathname, '/');
+
+ if(sep)
+ {
+ if(path) alstr_copy_wrange(path, pathname, sep);
+ if(fname) alstr_copy_wcstr(fname, sep+1);
+ }
+ else
+ {
+ if(path) alstr_clear(path);
+ if(fname) alstr_copy_wcstr(fname, pathname);
+ }
+ free(pathname);
+
+ if(path && fname)
+ TRACE("Got: %s, %s\n", alstr_get_cstr(*path), alstr_get_cstr(*fname));
+ else if(path) TRACE("Got path: %s\n", alstr_get_cstr(*path));
+ else if(fname) TRACE("Got filename: %s\n", alstr_get_cstr(*fname));
+}
+
+
+static WCHAR *FromUTF8(const char *str)
+{
+ WCHAR *out = NULL;
+ int len;
+
+ if((len=MultiByteToWideChar(CP_UTF8, 0, str, -1, NULL, 0)) > 0)
+ {
+ out = static_cast<WCHAR*>(calloc(sizeof(WCHAR), len));
+ MultiByteToWideChar(CP_UTF8, 0, str, -1, out, len);
+ }
+ return out;
+}
+
+
+void *LoadLib(const char *name)
+{
+ HANDLE hdl = NULL;
+ WCHAR *wname;
+
+ wname = FromUTF8(name);
+ if(!wname)
+ ERR("Failed to convert UTF-8 filename: \"%s\"\n", name);
+ else
+ {
+ hdl = LoadLibraryW(wname);
+ free(wname);
+ }
+ return hdl;
+}
+void CloseLib(void *handle)
+{ FreeLibrary(reinterpret_cast<HMODULE>(handle)); }
+void *GetSymbol(void *handle, const char *name)
+{
+ void *ret;
+
+ ret = reinterpret_cast<void*>(GetProcAddress(reinterpret_cast<HMODULE>(handle), name));
+ if(!ret) ERR("Failed to load %s\n", name);
+ return ret;
+}
+
+
+void al_print(const char *type, const char *func, const char *fmt, ...)
+{
+ char str[1024];
+ WCHAR *wstr;
+ va_list ap;
+
+ va_start(ap, fmt);
+ vsnprintf(str, sizeof(str), fmt, ap);
+ va_end(ap);
+
+ str[sizeof(str)-1] = 0;
+ wstr = FromUTF8(str);
+ if(!wstr)
+ fprintf(LogFile, "AL lib: %s %s: <UTF-8 error> %s", type, func, str);
+ else
+ {
+ fprintf(LogFile, "AL lib: %s %s: %ls", type, func, wstr);
+ free(wstr);
+ wstr = NULL;
+ }
+ fflush(LogFile);
+}
+
+
+static inline int is_slash(int c)
+{ return (c == '\\' || c == '/'); }
+
+static void DirectorySearch(const char *path, const char *ext, vector_al_string *results)
+{
+ al_string pathstr = AL_STRING_INIT_STATIC();
+ WIN32_FIND_DATAW fdata;
+ WCHAR *wpath;
+ HANDLE hdl;
+
+ alstr_copy_cstr(&pathstr, path);
+ alstr_append_cstr(&pathstr, "\\*");
+ alstr_append_cstr(&pathstr, ext);
+
+ TRACE("Searching %s\n", alstr_get_cstr(pathstr));
+
+ wpath = FromUTF8(alstr_get_cstr(pathstr));
+
+ hdl = FindFirstFileW(wpath, &fdata);
+ if(hdl != INVALID_HANDLE_VALUE)
+ {
+ size_t base = VECTOR_SIZE(*results);
+ do {
+ al_string str = AL_STRING_INIT_STATIC();
+ alstr_copy_cstr(&str, path);
+ alstr_append_char(&str, '\\');
+ alstr_append_wcstr(&str, fdata.cFileName);
+ TRACE("Got result %s\n", alstr_get_cstr(str));
+ VECTOR_PUSH_BACK(*results, str);
+ } while(FindNextFileW(hdl, &fdata));
+ FindClose(hdl);
+
+ if(VECTOR_SIZE(*results) > base)
+ qsort(VECTOR_BEGIN(*results)+base, VECTOR_SIZE(*results)-base,
+ sizeof(VECTOR_FRONT(*results)), StringSortCompare);
+ }
+
+ free(wpath);
+ alstr_reset(&pathstr);
+}
+
+vector_al_string SearchDataFiles(const char *ext, const char *subdir)
+{
+ static const int ids[2] = { CSIDL_APPDATA, CSIDL_COMMON_APPDATA };
+ static RefCount search_lock;
+ vector_al_string results = VECTOR_INIT_STATIC();
+ size_t i;
+
+ while(ATOMIC_EXCHANGE_SEQ(&search_lock, 1u) == 1u)
+ althrd_yield();
+
+ /* If the path is absolute, use it directly. */
+ if(isalpha(subdir[0]) && subdir[1] == ':' && is_slash(subdir[2]))
+ {
+ al_string path = AL_STRING_INIT_STATIC();
+ alstr_copy_cstr(&path, subdir);
+#define FIX_SLASH(i) do { if(*(i) == '/') *(i) = '\\'; } while(0)
+ VECTOR_FOR_EACH(char, path, FIX_SLASH);
+#undef FIX_SLASH
+
+ DirectorySearch(alstr_get_cstr(path), ext, &results);
+
+ alstr_reset(&path);
+ }
+ else if(subdir[0] == '\\' && subdir[1] == '\\' && subdir[2] == '?' && subdir[3] == '\\')
+ DirectorySearch(subdir, ext, &results);
+ else
+ {
+ al_string path = AL_STRING_INIT_STATIC();
+ WCHAR *cwdbuf;
+
+ /* Search the app-local directory. */
+ if((cwdbuf=_wgetenv(L"ALSOFT_LOCAL_PATH")) && *cwdbuf != '\0')
+ {
+ alstr_copy_wcstr(&path, cwdbuf);
+ if(is_slash(VECTOR_BACK(path)))
+ {
+ VECTOR_POP_BACK(path);
+ *VECTOR_END(path) = 0;
+ }
+ }
+ else if(!(cwdbuf=_wgetcwd(NULL, 0)))
+ alstr_copy_cstr(&path, ".");
+ else
+ {
+ alstr_copy_wcstr(&path, cwdbuf);
+ if(is_slash(VECTOR_BACK(path)))
+ {
+ VECTOR_POP_BACK(path);
+ *VECTOR_END(path) = 0;
+ }
+ free(cwdbuf);
+ }
+#define FIX_SLASH(i) do { if(*(i) == '/') *(i) = '\\'; } while(0)
+ VECTOR_FOR_EACH(char, path, FIX_SLASH);
+#undef FIX_SLASH
+ DirectorySearch(alstr_get_cstr(path), ext, &results);
+
+ /* Search the local and global data dirs. */
+ for(i = 0;i < COUNTOF(ids);i++)
+ {
+ WCHAR buffer[MAX_PATH];
+ if(SHGetSpecialFolderPathW(NULL, buffer, ids[i], FALSE) != FALSE)
+ {
+ alstr_copy_wcstr(&path, buffer);
+ if(!is_slash(VECTOR_BACK(path)))
+ alstr_append_char(&path, '\\');
+ alstr_append_cstr(&path, subdir);
+#define FIX_SLASH(i) do { if(*(i) == '/') *(i) = '\\'; } while(0)
+ VECTOR_FOR_EACH(char, path, FIX_SLASH);
+#undef FIX_SLASH
+
+ DirectorySearch(alstr_get_cstr(path), ext, &results);
+ }
+ }
+
+ alstr_reset(&path);
+ }
+
+ ATOMIC_STORE_SEQ(&search_lock, 0u);
+
+ return results;
+}
+
+#else
+
+void GetProcBinary(al_string *path, al_string *fname)
+{
+ char *pathname = NULL;
+ size_t pathlen;
+
+#ifdef __FreeBSD__
+ int mib[4] = { CTL_KERN, KERN_PROC, KERN_PROC_PATHNAME, -1 };
+ if(sysctl(mib, 4, NULL, &pathlen, NULL, 0) == -1)
+ WARN("Failed to sysctl kern.proc.pathname: %s\n", strerror(errno));
+ else
+ {
+ pathname = malloc(pathlen + 1);
+ sysctl(mib, 4, (void*)pathname, &pathlen, NULL, 0);
+ pathname[pathlen] = 0;
+ }
+#endif
+#ifdef HAVE_PROC_PIDPATH
+ if(!pathname)
+ {
+ const pid_t pid = getpid();
+ char procpath[PROC_PIDPATHINFO_MAXSIZE];
+ int ret;
+
+ ret = proc_pidpath(pid, procpath, sizeof(procpath));
+ if(ret < 1)
+ {
+ WARN("proc_pidpath(%d, ...) failed: %s\n", pid, strerror(errno));
+ free(pathname);
+ pathname = NULL;
+ }
+ else
+ {
+ pathlen = strlen(procpath);
+ pathname = strdup(procpath);
+ }
+ }
+#endif
+ if(!pathname)
+ {
+ const char *selfname;
+ ssize_t len;
+
+ pathlen = 256;
+ pathname = static_cast<char*>(malloc(pathlen));
+
+ selfname = "/proc/self/exe";
+ len = readlink(selfname, pathname, pathlen);
+ if(len == -1 && errno == ENOENT)
+ {
+ selfname = "/proc/self/file";
+ len = readlink(selfname, pathname, pathlen);
+ }
+ if(len == -1 && errno == ENOENT)
+ {
+ selfname = "/proc/curproc/exe";
+ len = readlink(selfname, pathname, pathlen);
+ }
+ if(len == -1 && errno == ENOENT)
+ {
+ selfname = "/proc/curproc/file";
+ len = readlink(selfname, pathname, pathlen);
+ }
+
+ while(len > 0 && (size_t)len == pathlen)
+ {
+ free(pathname);
+ pathlen <<= 1;
+ pathname = static_cast<char*>(malloc(pathlen));
+ len = readlink(selfname, pathname, pathlen);
+ }
+ if(len <= 0)
+ {
+ free(pathname);
+ WARN("Failed to readlink %s: %s\n", selfname, strerror(errno));
+ return;
+ }
+
+ pathname[len] = 0;
+ }
+
+ char *sep = strrchr(pathname, '/');
+ if(sep)
+ {
+ if(path) alstr_copy_range(path, pathname, sep);
+ if(fname) alstr_copy_cstr(fname, sep+1);
+ }
+ else
+ {
+ if(path) alstr_clear(path);
+ if(fname) alstr_copy_cstr(fname, pathname);
+ }
+ free(pathname);
+
+ if(path && fname)
+ TRACE("Got: %s, %s\n", alstr_get_cstr(*path), alstr_get_cstr(*fname));
+ else if(path) TRACE("Got path: %s\n", alstr_get_cstr(*path));
+ else if(fname) TRACE("Got filename: %s\n", alstr_get_cstr(*fname));
+}
+
+
+#ifdef HAVE_DLFCN_H
+
+void *LoadLib(const char *name)
+{
+ const char *err;
+ void *handle;
+
+ dlerror();
+ handle = dlopen(name, RTLD_NOW);
+ if((err=dlerror()) != NULL)
+ handle = NULL;
+ return handle;
+}
+void CloseLib(void *handle)
+{ dlclose(handle); }
+void *GetSymbol(void *handle, const char *name)
+{
+ const char *err;
+ void *sym;
+
+ dlerror();
+ sym = dlsym(handle, name);
+ if((err=dlerror()) != NULL)
+ {
+ WARN("Failed to load %s: %s\n", name, err);
+ sym = NULL;
+ }
+ return sym;
+}
+
+#endif /* HAVE_DLFCN_H */
+
+void al_print(const char *type, const char *func, const char *fmt, ...)
+{
+ va_list ap;
+
+ va_start(ap, fmt);
+ fprintf(LogFile, "AL lib: %s %s: ", type, func);
+ vfprintf(LogFile, fmt, ap);
+ va_end(ap);
+
+ fflush(LogFile);
+}
+
+
+static void DirectorySearch(const char *path, const char *ext, vector_al_string *results)
+{
+ size_t extlen = strlen(ext);
+ DIR *dir;
+
+ TRACE("Searching %s for *%s\n", path, ext);
+ dir = opendir(path);
+ if(dir != NULL)
+ {
+ size_t base = VECTOR_SIZE(*results);
+ struct dirent *dirent;
+ while((dirent=readdir(dir)) != NULL)
+ {
+ al_string str;
+ size_t len;
+ if(strcmp(dirent->d_name, ".") == 0 || strcmp(dirent->d_name, "..") == 0)
+ continue;
+
+ len = strlen(dirent->d_name);
+ if(len <= extlen)
+ continue;
+ if(strcasecmp(dirent->d_name+len-extlen, ext) != 0)
+ continue;
+
+ AL_STRING_INIT(str);
+ alstr_copy_cstr(&str, path);
+ if(VECTOR_BACK(str) != '/')
+ alstr_append_char(&str, '/');
+ alstr_append_cstr(&str, dirent->d_name);
+ TRACE("Got result %s\n", alstr_get_cstr(str));
+ VECTOR_PUSH_BACK(*results, str);
+ }
+ closedir(dir);
+
+ if(VECTOR_SIZE(*results) > base)
+ qsort(VECTOR_BEGIN(*results)+base, VECTOR_SIZE(*results)-base,
+ sizeof(VECTOR_FRONT(*results)), StringSortCompare);
+ }
+}
+
+vector_al_string SearchDataFiles(const char *ext, const char *subdir)
+{
+ static RefCount search_lock;
+ vector_al_string results = VECTOR_INIT_STATIC();
+
+ while(ATOMIC_EXCHANGE_SEQ(&search_lock, 1u) == 1u)
+ althrd_yield();
+
+ if(subdir[0] == '/')
+ DirectorySearch(subdir, ext, &results);
+ else
+ {
+ al_string path = AL_STRING_INIT_STATIC();
+ const char *str, *next;
+
+ /* Search the app-local directory. */
+ if((str=getenv("ALSOFT_LOCAL_PATH")) && *str != '\0')
+ DirectorySearch(str, ext, &results);
+ else
+ {
+ size_t cwdlen = 256;
+ char *cwdbuf = static_cast<char*>(malloc(cwdlen));
+ while(!getcwd(cwdbuf, cwdlen))
+ {
+ free(cwdbuf);
+ cwdbuf = NULL;
+ if(errno != ERANGE)
+ break;
+ cwdlen <<= 1;
+ cwdbuf = static_cast<char*>(malloc(cwdlen));
+ }
+ if(!cwdbuf)
+ DirectorySearch(".", ext, &results);
+ else
+ {
+ DirectorySearch(cwdbuf, ext, &results);
+ free(cwdbuf);
+ cwdbuf = NULL;
+ }
+ }
+
+ // Search local data dir
+ if((str=getenv("XDG_DATA_HOME")) != NULL && str[0] != '\0')
+ {
+ alstr_copy_cstr(&path, str);
+ if(VECTOR_BACK(path) != '/')
+ alstr_append_char(&path, '/');
+ alstr_append_cstr(&path, subdir);
+ DirectorySearch(alstr_get_cstr(path), ext, &results);
+ }
+ else if((str=getenv("HOME")) != NULL && str[0] != '\0')
+ {
+ alstr_copy_cstr(&path, str);
+ if(VECTOR_BACK(path) == '/')
+ {
+ VECTOR_POP_BACK(path);
+ *VECTOR_END(path) = 0;
+ }
+ alstr_append_cstr(&path, "/.local/share/");
+ alstr_append_cstr(&path, subdir);
+ DirectorySearch(alstr_get_cstr(path), ext, &results);
+ }
+
+ // Search global data dirs
+ if((str=getenv("XDG_DATA_DIRS")) == NULL || str[0] == '\0')
+ str = "/usr/local/share/:/usr/share/";
+
+ next = str;
+ while((str=next) != NULL && str[0] != '\0')
+ {
+ next = strchr(str, ':');
+ if(!next)
+ alstr_copy_cstr(&path, str);
+ else
+ {
+ alstr_copy_range(&path, str, next);
+ ++next;
+ }
+ if(!alstr_empty(path))
+ {
+ if(VECTOR_BACK(path) != '/')
+ alstr_append_char(&path, '/');
+ alstr_append_cstr(&path, subdir);
+
+ DirectorySearch(alstr_get_cstr(path), ext, &results);
+ }
+ }
+
+ alstr_reset(&path);
+ }
+
+ ATOMIC_STORE_SEQ(&search_lock, 0u);
+
+ return results;
+}
+
+#endif
+
+
+void SetRTPriority(void)
+{
+ ALboolean failed = AL_FALSE;
+
+#ifdef _WIN32
+ if(RTPrioLevel > 0)
+ failed = !SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_TIME_CRITICAL);
+#elif defined(HAVE_PTHREAD_SETSCHEDPARAM) && !defined(__OpenBSD__)
+ if(RTPrioLevel > 0)
+ {
+ struct sched_param param;
+ /* Use the minimum real-time priority possible for now (on Linux this
+ * should be 1 for SCHED_RR) */
+ param.sched_priority = sched_get_priority_min(SCHED_RR);
+ failed = !!pthread_setschedparam(pthread_self(), SCHED_RR, &param);
+ }
+#else
+ /* Real-time priority not available */
+ failed = (RTPrioLevel>0);
+#endif
+ if(failed)
+ ERR("Failed to set priority level for thread\n");
+}
+
+
+void alstr_clear(al_string *str)
+{
+ if(!alstr_empty(*str))
+ {
+ /* Reserve one more character than the total size of the string. This
+ * is to ensure we have space to add a null terminator in the string
+ * data so it can be used as a C-style string.
+ */
+ VECTOR_RESIZE(*str, 0, 1);
+ VECTOR_ELEM(*str, 0) = 0;
+ }
+}
+
+static inline int alstr_compare(const al_string_char_type *str1, size_t str1len,
+ const al_string_char_type *str2, size_t str2len)
+{
+ size_t complen = (str1len < str2len) ? str1len : str2len;
+ int ret = memcmp(str1, str2, complen);
+ if(ret == 0)
+ {
+ if(str1len > str2len) return 1;
+ if(str1len < str2len) return -1;
+ }
+ return ret;
+}
+int alstr_cmp(const_al_string str1, const_al_string str2)
+{
+ return alstr_compare(&VECTOR_FRONT(str1), alstr_length(str1),
+ &VECTOR_FRONT(str2), alstr_length(str2));
+}
+int alstr_cmp_cstr(const_al_string str1, const al_string_char_type *str2)
+{
+ return alstr_compare(&VECTOR_FRONT(str1), alstr_length(str1),
+ str2, strlen(str2));
+}
+
+void alstr_copy(al_string *str, const_al_string from)
+{
+ size_t len = alstr_length(from);
+ size_t i;
+
+ VECTOR_RESIZE(*str, len, len+1);
+ for(i = 0;i < len;i++)
+ VECTOR_ELEM(*str, i) = VECTOR_ELEM(from, i);
+ VECTOR_ELEM(*str, i) = 0;
+}
+
+void alstr_copy_cstr(al_string *str, const al_string_char_type *from)
+{
+ size_t len = strlen(from);
+ size_t i;
+
+ VECTOR_RESIZE(*str, len, len+1);
+ for(i = 0;i < len;i++)
+ VECTOR_ELEM(*str, i) = from[i];
+ VECTOR_ELEM(*str, i) = 0;
+}
+
+void alstr_copy_range(al_string *str, const al_string_char_type *from, const al_string_char_type *to)
+{
+ size_t len = to - from;
+ size_t i;
+
+ VECTOR_RESIZE(*str, len, len+1);
+ for(i = 0;i < len;i++)
+ VECTOR_ELEM(*str, i) = from[i];
+ VECTOR_ELEM(*str, i) = 0;
+}
+
+void alstr_append_char(al_string *str, const al_string_char_type c)
+{
+ size_t len = alstr_length(*str);
+ VECTOR_RESIZE(*str, len+1, len+2);
+ VECTOR_BACK(*str) = c;
+ VECTOR_ELEM(*str, len+1) = 0;
+}
+
+void alstr_append_cstr(al_string *str, const al_string_char_type *from)
+{
+ size_t len = strlen(from);
+ if(len != 0)
+ {
+ size_t base = alstr_length(*str);
+ size_t i;
+
+ VECTOR_RESIZE(*str, base+len, base+len+1);
+ for(i = 0;i < len;i++)
+ VECTOR_ELEM(*str, base+i) = from[i];
+ VECTOR_ELEM(*str, base+i) = 0;
+ }
+}
+
+void alstr_append_range(al_string *str, const al_string_char_type *from, const al_string_char_type *to)
+{
+ size_t len = to - from;
+ if(len != 0)
+ {
+ size_t base = alstr_length(*str);
+ size_t i;
+
+ VECTOR_RESIZE(*str, base+len, base+len+1);
+ for(i = 0;i < len;i++)
+ VECTOR_ELEM(*str, base+i) = from[i];
+ VECTOR_ELEM(*str, base+i) = 0;
+ }
+}
+
+#ifdef _WIN32
+void alstr_copy_wcstr(al_string *str, const wchar_t *from)
+{
+ int len;
+ if((len=WideCharToMultiByte(CP_UTF8, 0, from, -1, NULL, 0, NULL, NULL)) > 0)
+ {
+ VECTOR_RESIZE(*str, len-1, len);
+ WideCharToMultiByte(CP_UTF8, 0, from, -1, &VECTOR_FRONT(*str), len, NULL, NULL);
+ VECTOR_ELEM(*str, len-1) = 0;
+ }
+}
+
+void alstr_append_wcstr(al_string *str, const wchar_t *from)
+{
+ int len;
+ if((len=WideCharToMultiByte(CP_UTF8, 0, from, -1, NULL, 0, NULL, NULL)) > 0)
+ {
+ size_t base = alstr_length(*str);
+ VECTOR_RESIZE(*str, base+len-1, base+len);
+ WideCharToMultiByte(CP_UTF8, 0, from, -1, &VECTOR_ELEM(*str, base), len, NULL, NULL);
+ VECTOR_ELEM(*str, base+len-1) = 0;
+ }
+}
+
+void alstr_copy_wrange(al_string *str, const wchar_t *from, const wchar_t *to)
+{
+ int len;
+ if((len=WideCharToMultiByte(CP_UTF8, 0, from, (int)(to-from), NULL, 0, NULL, NULL)) > 0)
+ {
+ VECTOR_RESIZE(*str, len, len+1);
+ WideCharToMultiByte(CP_UTF8, 0, from, (int)(to-from), &VECTOR_FRONT(*str), len+1, NULL, NULL);
+ VECTOR_ELEM(*str, len) = 0;
+ }
+}
+
+void alstr_append_wrange(al_string *str, const wchar_t *from, const wchar_t *to)
+{
+ int len;
+ if((len=WideCharToMultiByte(CP_UTF8, 0, from, (int)(to-from), NULL, 0, NULL, NULL)) > 0)
+ {
+ size_t base = alstr_length(*str);
+ VECTOR_RESIZE(*str, base+len, base+len+1);
+ WideCharToMultiByte(CP_UTF8, 0, from, (int)(to-from), &VECTOR_ELEM(*str, base), len+1, NULL, NULL);
+ VECTOR_ELEM(*str, base+len) = 0;
+ }
+}
+#endif
generated by cgit v1.2.3 (git 2.39.1) at 2025-03-21 06:33:36 +0000