https://sourceware.org/bugzilla/show_bug.cgi?id=25713
--- Comment #24 from Fred Eisele <fredrick.eisele at gmail dot com> --- Here is a sample program that I think demonstrates the relevant functions. #include <stdio.h> #include <errno.h> #include <string.h> #include <conio.h> #include <stdlib.h> #include <windows.h> /** * https://docs.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-getfullpathnamew * https://docs.microsoft.com/en-us/windows/win32/api/stringapiset/nf-stringapiset-multibytetowidechar * @return */ int main() { wchar_t **lpFilePart = {NULL}; const char prefix[] = "\\\\?\\"; const char *paths[] = { "C:\\tools\\foo.o", "C:\\tools\\.\\foo.o", "C:\\tools\\msys64\\..\\foo.o", ".\\foo.o", ".\\increasepath\\increasepath\\increasepath\\increasepath\\" "increasepath\\increasepath\\increasepath\\increasepath\\increasepath\\" "increasepath\\increasepath\\increasepath\\increasepath\\increasepath\\" "increasepath\\increasepath\\increasepath\\increasepath\\increasepath\\" "increasepath\\increasepath\\test.o", ".\\increasepath\\increasepath\\.\\.\\increasepath\\increasepath\\" "increasepath\\increasepath\\..\\..\\increasepath\\increasepath\\increasepath\\increasepath\\increasepath\\" "increasepath\\increasepath\\increasepath\\increasepath\\increasepath\\" "increasepath\\increasepath\\increasepath\\increasepath\\increasepath\\" "increasepath\\increasepath\\test.o" }; setbuf(stderr, NULL); int loopLimit = sizeof(paths)/sizeof(*paths); for (int ix = 0; ix < loopLimit; ix++) { const char *partPathOrig = paths[ix]; /* * Converting from the partial path from ascii to unicode. * Calling with lpWideCharStr set to null returns the length. * Calling with cbMultiByte set to -1 includes the terminating null. */ int partPathWSize = MultiByteToWideChar(CP_UTF8, 0, partPathOrig, -1, NULL, 0); wchar_t *partPath = calloc(partPathWSize, sizeof(wchar_t)); MultiByteToWideChar(CP_UTF8, 0, partPathOrig, -1, partPath, partPathWSize); fprintf(stderr, "PartPath: size = %d val = %ls\n", partPathWSize, partPath); /* * Getting the full path from the provided partial path. * */ long fullPathWSize = GetFullPathNameW(partPath, 0, NULL, lpFilePart); wchar_t *fullPath = calloc(fullPathWSize, sizeof(wchar_t)); long copiedPathLen = GetFullPathNameW(partPath, fullPathWSize, fullPath, lpFilePart); fprintf(stderr, "PathLen = %d LastError = %d\n", copiedPathLen, GetLastError()); fprintf(stderr, "FullPath: size = %d val: %ls\n", fullPathWSize, fullPath); free(fullPath); free(partPath); } return 0; } -- You are receiving this mail because: You are on the CC list for the bug.
