tst: test case insensitivity

sys: FspFileNameIsValid: $DATA is case insensitive

tst/winfsp-tests/winfsp-tests.c

@@ -1,4 +1,5 @@
 #include <tlib/testsuite.h>
+#include <time.h>
 
 #include "winfsp-tests.h"
 
@@ -6,6 +7,113 @@ int NtfsTests = 0;
 int WinFspDiskTests = 1;
 int WinFspNetTests = 1;
 
+BOOLEAN OptCaseInsensitive = FALSE;
+BOOLEAN OptCaseRandomize = FALSE;
+
+int mywcscmp(PWSTR a, int alen, PWSTR b, int blen)
+{
+    int len, res;
+
+    if (-1 == alen)
+        alen = (int)wcslen(a);
+    if (-1 == blen)
+        blen = (int)wcslen(b);
+
+    len = alen < blen ? alen : blen;
+
+    /* we should still be in the C locale */
+    if (OptCaseRandomize)
+        res = _wcsnicmp(a, b, len);
+    else
+        res = wcsncmp(a, b, len);
+
+    if (0 == res)
+        res = alen - blen;
+
+    return res;
+}
+
+#define testalpha(c)                    ('a' <= ((c) | 0x20) && ((c) | 0x20) <= 'z')
+#define togglealpha(c)                  ((c) ^ 0x20)
+#undef CreateFileW
+static unsigned myrandseed = 1;
+static int myrand(void)
+{
+    /*
+     * This mimics MSVCRT rand(); we need our own version
+     * as to not interfere with the program's rand().
+     */
+
+    myrandseed = myrandseed * 214013 + 2531011;
+    return (myrandseed >> 16) & RAND_MAX;
+}
+HANDLE HookCreateFileW(
+    LPCWSTR lpFileName,
+    DWORD dwDesiredAccess,
+    DWORD dwShareMode,
+    LPSECURITY_ATTRIBUTES lpSecurityAttributes,
+    DWORD dwCreationDisposition,
+    DWORD dwFlagsAndAttributes,
+    HANDLE hTemplateFile)
+{
+    static WCHAR DevicePrefix[] =
+        L"\\\\?\\GLOBALROOT\\Device\\Volume{01234567-0123-0123-0101-010101010101}\\";
+    static const TogglePercent = 25;
+    WCHAR FileNameBuf[1024];
+    PWSTR P, EndP;
+
+    wcscpy_s(FileNameBuf, sizeof FileNameBuf / sizeof(WCHAR), lpFileName);
+    if (OptCaseRandomize)
+    {
+        if (L'\\' == FileNameBuf[0] && L'\\' == FileNameBuf[1] &&
+            L'?' == FileNameBuf[2] && L'\\' == FileNameBuf[3] &&
+            testalpha(FileNameBuf[4]) && L':' == FileNameBuf[5] && L'\\' == FileNameBuf[6])
+            P = FileNameBuf + 7;
+        else if (0 == wcsncmp(FileNameBuf, DevicePrefix, wcschr(DevicePrefix, L'{') - DevicePrefix))
+            P = FileNameBuf + wcslen(DevicePrefix);
+        else if (L'\\' == FileNameBuf[0] && L'\\' == FileNameBuf[1])
+            P = FileNameBuf + 2;
+        else if (testalpha(FileNameBuf[0]) && L':' == FileNameBuf[1] && L'\\' == FileNameBuf[2])
+            P = FileNameBuf + 3;
+        else
+            abort();
+
+        for (EndP = P + wcslen(P); EndP > P; P++)
+            if (testalpha(*P) && myrand() <= (TogglePercent) * 0x7fff / 100)
+                *P = togglealpha(*P);
+    }
+
+    HANDLE h = CreateFileW(
+        FileNameBuf,
+        dwDesiredAccess,
+        dwShareMode,
+        lpSecurityAttributes,
+        dwCreationDisposition,
+        dwFlagsAndAttributes,
+        hTemplateFile);
+
+#if 0
+    DWORD LastError = GetLastError();
+    FspDebugLog("CreateFileW(\"%S\", %#lx, %#lx, %p, %#lx, %#lx, %p) = %p[%#lx]\n",
+        FileNameBuf,
+        dwDesiredAccess,
+        dwShareMode,
+        lpSecurityAttributes,
+        dwCreationDisposition,
+        dwFlagsAndAttributes,
+        hTemplateFile,
+        h, INVALID_HANDLE_VALUE != h ? 0 : LastError);
+    SetLastError(LastError);
+#endif
+
+    return h;
+}
+
+#define rmarg(argv, argc, argi)         \
+    argc--,\
+    memmove(argv + argi, argv + argi + 1, (argc - argi) * sizeof(char *)),\
+    argi--,\
+    argv[argc] = 0
 int main(int argc, char *argv[])
 {
     TESTSUITE(fuse_opt_tests);
@@ -25,6 +133,27 @@ int main(int argc, char *argv[])
     TESTSUITE(reparse_tests);
     TESTSUITE(stream_tests);
 
+    for (int argi = 1; argc > argi; argi++)
+    {
+        const char *a = argv[argi];
+        if ('-' == a[0])
+        {
+            if (0 == strcmp("--case-insensitive", a))
+            {
+                OptCaseInsensitive = TRUE;
+                rmarg(argv, argc, argi);
+            }
+            else if (0 == strcmp("--case-randomize", a))
+            {
+                OptCaseRandomize = TRUE;
+                OptCaseInsensitive = TRUE;
+                rmarg(argv, argc, argi);
+            }
+        }
+    }
+
+    myrandseed = (unsigned)time(0);
+
     tlib_run_tests(argc, argv);
     return 0;
 }