1 files changed, 142 insertions, 0 deletions
diff --git a/reference/C/CONTRIB/SNIP/fln_fix.c b/reference/C/CONTRIB/SNIP/fln_fix.c
new file mode 100755
index 0000000..e1ded2e
--- /dev/null
+++ b/reference/C/CONTRIB/SNIP/fln_fix.c
@@ -0,0 +1,142 @@
+/*
+**  FLN_FIX.C
+**
+**  Original Copyright 1988-1991 by Bob Stout as part of
+**  the MicroFirm Function Library (MFL)
+**
+**  This subset version is functionally identical to the
+**  version originally published by the author in Tech Specialist
+**  magazine and is hereby donated to the public domain.
+*/
+
+#include <stdio.h>
+#include <string.h>
+#include <dos.h>
+#include <io.h>
+
+#define LAST_CHAR(string) (((char *)string)[strlen(string)-1])
+
+typedef enum {ERROR = -1, FALSE, TRUE} LOGICAL;
+
+char *unix2dos(char *path);
+
+/****************************************************************/
+/*                                                              */
+/*  Function to `crunch' dot directories and check for          */
+/*  DOS-valid path strings. Drive specifiers in the path        */
+/*  ignored.                                                    */
+/*                                                              */
+/****************************************************************/
+
+char *fln_fix(char *path)
+{
+      LOGICAL dir_flag = FALSE, root_flag = FALSE;
+      char *r, *p, *q, *s;
+
+      if (path)
+            strupr(path);
+
+      /* Ignore leading drive specs   */
+
+      if (NULL == (r = strrchr(path, ':')))
+            r = path;
+      else  ++r;
+
+      unix2dos(r);                      /* Convert Unix to DOS style    */
+
+      while ('\\' == *r)                /* Ignore leading backslashes   */
+      {
+            if ('\\' == r[1])
+                  strcpy(r, &r[1]);
+            else
+            {
+                  root_flag = TRUE;
+                  ++r;
+            }
+      }
+
+      p = r;                            /* Change "\\" to "\"           */
+      while (NULL != (p = strchr(p, '\\')))
+      {
+            if ('\\' ==  p[1])
+                  strcpy(p, &p[1]);
+            else  ++p;
+      }
+
+      while ('.' == *r)                 /* Scrunch leading ".\"         */
+      {
+            if ('.' == r[1])
+            {
+                  /* Ignore leading ".."                                */
+
+                  for (p = (r += 2); *p && (*p != '\\'); ++p)
+                        ;
+            }
+            else
+            {
+                  for (p = r + 1 ;*p && (*p != '\\'); ++p)
+                        ;
+            }
+            strcpy(r, p + ((*p) ? 1 : 0));
+      }
+
+      while ('\\' == LAST_CHAR(path))   /* Strip trailing backslash     */
+      {
+            dir_flag = TRUE;
+            LAST_CHAR(path) = '\0';
+      }
+
+      s = r;
+
+      /* Look for "\." in path        */
+
+      while (NULL != (p = strstr(s, "\\.")))
+      {
+            if ('.' == p[2])
+            {
+                  /* Execute this section if ".." found                 */
+
+                  q = p - 1;
+                  while (q > r)           /* Backup one level           */
+                  {
+                        if (*q == '\\')
+                              break;
+                        --q;
+                  }
+                  if (q > r)
+                  {
+                        strcpy(q, p + 3);
+                        s = q;
+                  }
+                  else if ('.' != *q)
+                  {
+                        strcpy(q + ((*q == '\\') ? 1 : 0),
+                              p + 3 + ((*(p + 3)) ? 1 : 0));
+                        s = q;
+                  }
+                  else  s = ++p;
+
+            }
+            else
+            {
+                  /* Execute this section if "." found                  */
+
+                  q = p + 2;
+                  for ( ;*q && (*q != '\\'); ++q)
+                        ;
+                  strcpy (p, q);
+            }
+      }
+
+      if (root_flag)  /* Embedded ".." could have bubbled up to root  */
+      {
+            for (p = r; *p && ('.' == *p || '\\' == *p); ++p)
+                  ;
+            if (r != p)
+                  strcpy(r, p);
+      }
+
+      if (dir_flag)
+            strcat(path, "\\");
+      return path;
+}