| Guido van Rossum | 6dbd190 | 1996-08-21 15:03:37 +0000 | [diff] [blame^] | 1 | #include "Python.h" |
| 2 | #include "osdefs.h" |
| 3 | #include <windows.h> |
| 4 | |
| 5 | #ifndef WIN32_PATCH_LEVEL |
| 6 | #define WIN32_PATCH_LEVEL "000" |
| 7 | #endif |
| 8 | |
| 9 | /* PREFIX and EXEC_PREFIX are meaningless on Windows */ |
| 10 | |
| 11 | #ifndef PREFIX |
| 12 | #define PREFIX "" |
| 13 | #endif |
| 14 | |
| 15 | #ifndef EXEC_PREFIX |
| 16 | #define EXEC_PREFIX "" |
| 17 | #endif |
| 18 | |
| 19 | /* |
| 20 | This is a special Win32 version of getpath. |
| 21 | |
| 22 | * There is no default path. There is nothing even remotely resembling |
| 23 | a standard location. Maybe later "Program Files/Python", but not yet. |
| 24 | |
| 25 | * The Registry is used as the primary store for the Python path. |
| 26 | |
| 27 | * The environment variable PYTHONPATH _overrides_ the registry. This should |
| 28 | allow a "standard" Python environment, but allow you to manually setup |
| 29 | another (eg, a beta version). |
| 30 | |
| 31 | */ |
| 32 | |
| 33 | BOOL PyWin_IsWin32s() |
| 34 | { |
| 35 | static BOOL bIsWin32s = -1; // flag as "not yet looked" |
| 36 | |
| 37 | if (bIsWin32s==-1) { |
| 38 | OSVERSIONINFO ver; |
| 39 | ver.dwOSVersionInfoSize = sizeof(ver); |
| 40 | GetVersionEx(&ver); |
| 41 | bIsWin32s = ver.dwPlatformId == VER_PLATFORM_WIN32s; |
| 42 | } |
| 43 | return bIsWin32s; |
| 44 | } |
| 45 | |
| 46 | /* Load a PYTHONPATH value from the registry |
| 47 | Load from either HKEY_LOCAL_MACHINE or HKEY_CURRENT_USER |
| 48 | |
| 49 | Returns NULL, or a pointer that should be free'd. |
| 50 | */ |
| 51 | static char * |
| 52 | getpythonregpath(HKEY keyBase, BOOL bWin32s) |
| 53 | { |
| 54 | HKEY newKey = 0; |
| 55 | DWORD nameSize = 0; |
| 56 | DWORD dataSize = 0; |
| 57 | DWORD numEntries = 0; |
| 58 | LONG rc; |
| 59 | char *retval = NULL; |
| 60 | char *dataBuf; |
| 61 | if ((rc=RegOpenKey(keyBase, "Software\\Python\\PythonCore\\" WIN32_PATCH_LEVEL "\\PythonPath", |
| 62 | &newKey))==ERROR_SUCCESS) { |
| 63 | RegQueryInfoKey(newKey, NULL, NULL, NULL, NULL, NULL, NULL, |
| 64 | &numEntries, &nameSize, &dataSize, NULL, NULL ); |
| 65 | } |
| 66 | if (numEntries==0) { |
| 67 | if (newKey) |
| 68 | CloseHandle(newKey); |
| 69 | if ((rc=RegOpenKey(keyBase, "Software\\Python\\PythonPath", |
| 70 | &newKey))==ERROR_SUCCESS) { |
| 71 | RegQueryInfoKey(newKey, NULL, NULL, NULL, NULL, NULL, NULL, |
| 72 | &numEntries, &nameSize, &dataSize, NULL, NULL ); |
| 73 | } |
| 74 | } |
| 75 | if (bWin32s && numEntries==0 && dataSize==0) { /* must hardcode for Win32s */ |
| 76 | numEntries = 1; |
| 77 | dataSize = 511; |
| 78 | } |
| 79 | if (numEntries) { |
| 80 | dataBuf = malloc(dataSize); |
| 81 | // on NT, datasize is unicode - ie, 2xstrlen, |
| 82 | // even when ascii string returned. |
| 83 | // presumably will be 1xstrlen on 95/win3.1 |
| 84 | // Additionally, win32s doesnt work as expected, so |
| 85 | // the specific strlen() is required for 3.1. |
| 86 | rc = RegQueryValue(newKey, "", dataBuf, &dataSize); |
| 87 | if (rc==ERROR_SUCCESS) { |
| 88 | if (strlen(dataBuf)==0) |
| 89 | free(dataBuf); |
| 90 | else |
| 91 | retval = dataBuf; // caller will free |
| 92 | } |
| 93 | else |
| 94 | free(dataBuf); |
| 95 | } |
| 96 | |
| 97 | if (newKey) |
| 98 | CloseHandle(newKey); |
| 99 | return retval; |
| 100 | } |
| 101 | /* Return the initial python search path. This is called once from |
| 102 | initsys() to initialize sys.path. The environment variable |
| 103 | PYTHONPATH is fetched and the default path appended. The default |
| 104 | path may be passed to the preprocessor; if not, a system-dependent |
| 105 | default is used. */ |
| 106 | |
| 107 | char * |
| 108 | Py_GetPath() |
| 109 | { |
| 110 | char *path = getenv("PYTHONPATH"); |
| 111 | char *defpath = PYTHONPATH; |
| 112 | static char *buf = NULL; |
| 113 | char *p; |
| 114 | int n; |
| 115 | |
| 116 | if (buf != NULL) { |
| 117 | free(buf); |
| 118 | buf = NULL; |
| 119 | } |
| 120 | |
| 121 | if (path == NULL) { |
| 122 | char *machinePath, *userPath; |
| 123 | int machineLen, userLen; |
| 124 | /* lookup the registry */ |
| 125 | BOOL bWin32s = PyWin_IsWin32s(); |
| 126 | |
| 127 | if (bWin32s) { /* are we running under Windows 3.1 Win32s */ |
| 128 | /* only CLASSES_ROOT is supported */ |
| 129 | machinePath = getpythonregpath(HKEY_CLASSES_ROOT, TRUE); |
| 130 | userPath = NULL; |
| 131 | } else { |
| 132 | machinePath = getpythonregpath(HKEY_LOCAL_MACHINE, FALSE); |
| 133 | userPath = getpythonregpath(HKEY_CURRENT_USER, FALSE); |
| 134 | } |
| 135 | if (machinePath==NULL && userPath==NULL) return defpath; |
| 136 | machineLen = machinePath ? strlen(machinePath) : 0; |
| 137 | userLen = userPath ? strlen(userPath) : 0; |
| 138 | n = machineLen + userLen + 1; |
| 139 | // this is a memory leak, as Python never frees it. Only ever called once, so big deal! |
| 140 | buf = malloc(n); |
| 141 | if (buf == NULL) |
| 142 | Py_FatalError("not enough memory to copy module search path"); |
| 143 | p = buf; |
| 144 | *p = '\0'; |
| 145 | if (machineLen) { |
| 146 | strcpy(p, machinePath); |
| 147 | p += machineLen; |
| 148 | } |
| 149 | if (userLen) { |
| 150 | if (machineLen) |
| 151 | *p++ = DELIM; |
| 152 | strcpy(p, userPath); |
| 153 | } |
| 154 | if (userPath) free(userPath); |
| 155 | if (machinePath) free(machinePath); |
| 156 | } else { |
| 157 | |
| 158 | buf = malloc(strlen(path)+1); |
| 159 | if (buf == NULL) |
| 160 | Py_FatalError("not enough memory to copy module search path"); |
| 161 | strcpy(buf, path); |
| 162 | } |
| 163 | return buf; |
| 164 | } |
| 165 | |
| 166 | /* Similar for Makefile variables $prefix and $exec_prefix */ |
| 167 | |
| 168 | char * |
| 169 | Py_GetPrefix() |
| 170 | { |
| 171 | return PREFIX; |
| 172 | } |
| 173 | |
| 174 | char * |
| 175 | Py_GetExecPrefix() |
| 176 | { |
| 177 | return EXEC_PREFIX; |
| 178 | } |