Merge pull request #1850 from bimbashrestha/named_pipes

Gating named pipe support on windows

programs/fileio.c

@@ -525,7 +525,11 @@ static FILE* FIO_openSrcFile(const char* srcFileName)
         return NULL;
     }
 
-    if (!UTIL_isRegularFile(srcFileName) && !UTIL_isFIFO(srcFileName)) {
+    if (!UTIL_isRegularFile(srcFileName)
+#ifndef _MSC_VER
+        && !UTIL_isFIFO(srcFileName)
+#endif /* _MSC_VER */
+    ) {
         DISPLAYLEVEL(1, "zstd: %s is not a regular file -- ignored \n",
                         srcFileName);
         return NULL;

programs/util.c

@@ -126,6 +126,8 @@ int UTIL_isSameFile(const char* fName1, const char* fName2)
 #endif
 }
 
+#ifndef _MSC_VER
+/* Using this to distinguish named pipes */
 U32 UTIL_isFIFO(const char* infilename)
 {
 /* macro guards, as defined in : https://linux.die.net/man/2/lstat */
@@ -137,7 +139,7 @@ U32 UTIL_isFIFO(const char* infilename)
     (void)infilename;
     return 0;
 }
-
+#endif
 
 U32 UTIL_isLink(const char* infilename)
 {

programs/util.h

@@ -137,7 +137,9 @@ int UTIL_compareStr(const void *p1, const void *p2);
 int UTIL_isCompressedFile(const char* infilename, const char *extensionList[]);
 const char* UTIL_getFileExtension(const char* infilename);
 
+#ifndef _MSC_VER
 U32 UTIL_isFIFO(const char* infilename);
+#endif
 U32 UTIL_isLink(const char* infilename);
 #define UTIL_FILESIZE_UNKNOWN  ((U64)(-1))
 U64 UTIL_getFileSize(const char* infilename);

programs/zstdcli.c

@@ -1005,7 +1005,11 @@ int main(int argCount, const char* argv[])
     if (!followLinks) {
         unsigned u;
         for (u=0, fileNamesNb=0; u<filenameIdx; u++) {
-            if (UTIL_isLink(filenameTable[u]) && !UTIL_isFIFO(filenameTable[u])) {
+            if (UTIL_isLink(filenameTable[u])
+#ifndef _MSC_VER
+                && !UTIL_isFIFO(filenameTable[u])
+#endif /* _MSC_VER */
+            ) {
                 DISPLAYLEVEL(2, "Warning : %s is a symbolic link, ignoring\n", filenameTable[u]);
             } else {
                 filenameTable[fileNamesNb++] = filenameTable[u];