diff --git a/src/platform_cygwin.cc b/src/platform_cygwin.cc index f2a1e84324..4fcade8bce 100644 --- a/src/platform_cygwin.cc +++ b/src/platform_cygwin.cc @@ -3,11 +3,31 @@ #include // for MAXPATHLEN #include // getpagesize +#include namespace node { static char buf[MAXPATHLEN + 1]; +static char *process_title = NULL; + + +// Does the about the same as perror(), but for windows api functions +static void _winapi_perror(const char* prefix = NULL) { + DWORD errno = GetLastError(); + char *errmsg; + + FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, + NULL, errno, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPTSTR)&errmsg, 0, NULL); + + // FormatMessage messages include a newline character + + if (prefix) { + fprintf(stderr, "%s: %s", prefix, errmsg); + } else { + fputs(errmsg, stderr); + } +} char** OS::SetupArgs(int argc, char *argv[]) { @@ -16,13 +36,123 @@ char** OS::SetupArgs(int argc, char *argv[]) { void OS::SetProcessTitle(char *title) { - ; + // We need to convert _title_ to UTF-16 first, because that's what windows uses internally. + // It would be more efficient to use the UTF-16 value that we can obtain from v8, + // but it's not accessible from here. + + // Max title length; according to the specs it should be 64K but in practice it's a little over 30000, + // but who needs titles that long anyway? + const int MAX_TITLE_LENGTH = 30001; + + int length; + WCHAR *title_w; + + // Find out how big the buffer for the wide-char title must be + length = MultiByteToWideChar(CP_UTF8, 0, title, -1, NULL, 0); + if (!length) { + _winapi_perror("MultiByteToWideChar"); + return; + } + + // Convert to wide-char string + title_w = new WCHAR[length]; + length = MultiByteToWideChar(CP_UTF8, 0, title, -1, title_w, length); + if (!length) { + _winapi_perror("MultiByteToWideChar"); + delete title_w; + return; + }; + + // If the title must be truncated insert a \0 terminator there + if (length > MAX_TITLE_LENGTH) { + title_w[MAX_TITLE_LENGTH - 1] = *L"\0"; + } + + if (!SetConsoleTitleW(title_w)) { + _winapi_perror("SetConsoleTitleW"); + } + + free(process_title); + process_title = strdup(title); + + delete title_w; +} + + +static inline char* _getProcessTitle() { + WCHAR *title_w; + char *title; + int length, length_w; + + length_w = GetConsoleTitleW(L"\0", sizeof(WCHAR)); + + // If length is zero, there may be an error or the title may be empty + if (!length_w) { + if (GetLastError()) { + _winapi_perror("GetConsoleTitleW"); + return NULL; + } + else { + // The title is empty, so return empty string + process_title = strdup("\0"); + return process_title; + } + } + + // Room for \0 terminator + length_w++; + + title_w = new WCHAR[length_w]; + + if (!GetConsoleTitleW(title_w, length_w * sizeof(WCHAR))) { + _winapi_perror("GetConsoleTitleW"); + delete title_w; + return NULL; + } + + // Find out what the size of the buffer is that we need + length = WideCharToMultiByte(CP_UTF8, 0, title_w, length_w, NULL, 0, NULL, NULL); + if (!length) { + _winapi_perror("WideCharToMultiByte"); + delete title_w; + return NULL; + } + + title = (char *) malloc(length); + if (!title) { + perror("malloc"); + delete title_w; + return NULL; + } + + // Do utf16 -> utf8 conversion here + if (!WideCharToMultiByte(CP_UTF8, 0, title_w, -1, title, length, NULL, NULL)) { + _winapi_perror("WideCharToMultiByte"); + delete title_w; + free(title); + return NULL; + } + + delete title_w; + + return title; } const char* OS::GetProcessTitle(int *len) { - *len = 0; - return NULL; + // If the process_title was never read before nor explicitly set, + // we must query it with getConsoleTitleW + if (!process_title) { + process_title = _getProcessTitle(); + } + + if (process_title) { + *len = strlen(process_title); + return process_title; + } else { + *len = 0; + return NULL; + } }