1 //===-- Windows.cpp ---------------------------------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file provides Windows support functions
12 #include "lldb/Host/windows/windows.h"
13 #include "lldb/Host/windows/win32.h"
15 #include "llvm/Support/ConvertUTF.h"
26 // These prototypes are defined in <direct.h>, but it also defines chdir() and getcwd(), giving multiply defined errors
29 char *_getcwd(char *buffer, int maxlen);
30 int _chdir(const char *path);
36 utf8ToWide(const char *utf8, wchar_t *buf, size_t bufSize)
38 const UTF8 *sourceStart = reinterpret_cast<const UTF8 *>(utf8);
39 size_t sourceLen = strlen(utf8) + 1 /* convert null too */;
40 UTF16 *target = reinterpret_cast<UTF16 *>(buf);
41 ConversionFlags flags = strictConversion;
42 return ConvertUTF8toUTF16(&sourceStart, sourceStart + sourceLen, &target, target + bufSize, flags) == conversionOK;
46 wideToUtf8(const wchar_t *wide, char *buf, size_t bufSize)
48 const UTF16 *sourceStart = reinterpret_cast<const UTF16 *>(wide);
49 size_t sourceLen = wcslen(wide) + 1 /* convert null too */;
50 UTF8 *target = reinterpret_cast<UTF8 *>(buf);
51 ConversionFlags flags = strictConversion;
52 return ConvertUTF16toUTF8(&sourceStart, sourceStart + sourceLen, &target, target + bufSize, flags) == conversionOK;
56 int vasprintf(char **ret, const char *fmt, va_list ap)
63 #if defined(_MSC_VER) || defined(__MINGW64)
65 len = _vscprintf(fmt, ap2);
68 len = vsnprintf(NULL, 0, fmt, ap2);
71 if (len >= 0 && (buf = (char*) malloc ((buflen = (size_t) (len + 1)))) != NULL) {
72 len = vsnprintf(buf, buflen, fmt, ap);
83 char* strcasestr(const char *s, const char* find)
88 if ((c = *find++) != 0) {
89 c = tolower((unsigned char) c);
95 } while ((char) tolower((unsigned char) sc) != c);
96 } while (strncasecmp(s, find, len) != 0);
102 char* realpath(const char * name, char * resolved)
104 char *retname = NULL;
106 /* SUSv3 says we must set `errno = EINVAL', and return NULL,
107 * if `name' is passed as a NULL pointer.
115 /* Otherwise, `name' must refer to a readable filesystem object,
116 * if we are going to resolve its absolute path name.
118 wchar_t wideNameBuffer[PATH_MAX];
119 wchar_t *wideName = wideNameBuffer;
120 if (!utf8ToWide(name, wideName, PATH_MAX))
126 if (_waccess(wideName, 4) != 0)
129 /* If `name' didn't point to an existing entity,
130 * then we don't get to here; we simply fall past this block,
131 * returning NULL, with `errno' appropriately set by `access'.
133 * When we _do_ get to here, then we can use `_fullpath' to
134 * resolve the full path for `name' into `resolved', but first,
135 * check that we have a suitable buffer, in which to return it.
138 if ((retname = resolved) == NULL)
140 /* Caller didn't give us a buffer, so we'll exercise the
141 * option granted by SUSv3, and allocate one.
143 * `_fullpath' would do this for us, but it uses `malloc', and
144 * Microsoft's implementation doesn't set `errno' on failure.
145 * If we don't do this explicitly ourselves, then we will not
146 * know if `_fullpath' fails on `malloc' failure, or for some
147 * other reason, and we want to set `errno = ENOMEM' for the
148 * `malloc' failure case.
151 retname = (char *)malloc(PATH_MAX);
159 /* Otherwise, when we do have a valid buffer,
160 * `_fullpath' should only fail if the path name is too long.
163 wchar_t wideFullPathBuffer[PATH_MAX];
164 wchar_t *wideFullPath;
165 if ((wideFullPath = _wfullpath(wideFullPathBuffer, wideName, PATH_MAX)) == NULL)
167 errno = ENAMETOOLONG;
171 // Do a LongPath<->ShortPath roundtrip so that case is resolved by OS
172 // FIXME: Check for failure
173 size_t initialLength = wcslen(wideFullPath);
174 GetShortPathNameW(wideFullPath, wideNameBuffer, PATH_MAX);
175 GetLongPathNameW(wideNameBuffer, wideFullPathBuffer, initialLength + 1);
177 // Convert back to UTF-8
178 if (!wideToUtf8(wideFullPathBuffer, retname, PATH_MAX))
184 // Force drive to be upper case
185 if (retname[1] == ':')
186 retname[0] = toupper(retname[0]);
193 char* basename(char *path)
195 char* l1 = strrchr(path, '\\');
196 char* l2 = strrchr(path, '/');
197 if (l2 > l1) l1 = l2;
198 if (!l1) return path; // no base name
202 // use _getcwd() instead of GetCurrentDirectory() because it updates errno
203 char* getcwd(char* path, int max)
205 assert(path == NULL || max <= PATH_MAX);
206 wchar_t wpath[PATH_MAX];
207 if (wchar_t *wresult = _wgetcwd(wpath, PATH_MAX))
209 // Caller is allowed to pass in NULL for `path`.
210 // In that case, we're supposed to allocate a
211 // buffer on the caller's behalf.
214 max = UNI_MAX_UTF8_BYTES_PER_CODE_POINT * wcslen(wresult) + 1;
215 path = (char *)malloc(max);
222 if (wideToUtf8(wresult, path, max))
228 // use _chdir() instead of SetCurrentDirectory() because it updates errno
229 int chdir(const char* path)
234 char *dirname(char *path)
236 char* l1 = strrchr(path, '\\');
237 char* l2 = strrchr(path, '/');
238 if (l2 > l1) l1 = l2;
239 if (!l1) return NULL; // no dir name
244 int strcasecmp(const char* s1, const char* s2)
246 return stricmp(s1, s2);
249 int strncasecmp(const char* s1, const char* s2, size_t n)
251 return strnicmp(s1, s2, n);
254 int usleep(uint32_t useconds)
256 Sleep(useconds / 1000);
261 namespace lldb_private {
262 int vsnprintf(char *buffer, size_t count, const char *format, va_list argptr)
264 int old_errno = errno;
265 int r = ::vsnprintf(buffer, count, format, argptr);
266 int new_errno = errno;
267 buffer[count-1] = '\0';
268 if (r == -1 || r == count)
270 FILE *nul = fopen("nul", "w");
271 int bytes_written = ::vfprintf(nul, format, argptr);
273 if (bytes_written < count)
283 } // namespace lldb_private