1 files changed, 74 insertions, 0 deletions
diff --git a/reference/C/CONTRIB/SNIP/getdcwd.c b/reference/C/CONTRIB/SNIP/getdcwd.c
new file mode 100755
index 0000000..4b5ac6d
--- /dev/null
+++ b/reference/C/CONTRIB/SNIP/getdcwd.c
@@ -0,0 +1,74 @@
+/*
+** GETDCWD.C - returns the current working directory for a specific drive
+**
+** public domain by Bob Jarvis, modified by Bob Stout
+*/
+
+#if defined(__ZTC__)
+ #define GetDrive(d) dos_getdrive(&d)
+ #define FAR _far
+#elif defined(__TURBOC__)
+ #define GetDrive(d) ((d) = getdisk() + 1)
+ #define FAR far
+#else /* assume MSC */
+ #define GetDrive(d) _dos_getdrive(&d)
+ #define FAR _far
+#endif
+
+#include <dos.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <ctype.h>
+
+char *getdcwd(unsigned int drive)   /* 0 = current, 1 = A, 2 = B, etc */
+{
+      union REGS regs;
+      struct SREGS sregs;
+      char *retptr;
+
+      retptr = calloc(FILENAME_MAX + 4, sizeof(char));
+      if(retptr == NULL)
+            return NULL;
+
+      if(drive == 0)    /* figure out which drive is current */
+      {
+            GetDrive(drive);
+            drive += 1;
+      }
+
+      *retptr = (char)((drive-1) + 'A');
+      *(retptr+1) = ':';
+      *(retptr+2) = '\\';
+
+      segread(&sregs);
+      regs.h.ah = 0x47;
+      regs.h.dl = (unsigned char)drive;
+      sregs.ds  = FP_SEG((void FAR *)retptr);
+      regs.x.si = FP_OFF((void FAR *)retptr) + 3;
+
+      intdosx(&regs, &regs, &sregs);
+      if (15 == regs.x.ax)     /* drive number invalid */
+      {
+            free(retptr);
+            return NULL;
+      }
+      else  return retptr;
+}
+
+#ifdef TEST
+
+void main(int argc, char *argv[])
+{
+      char *curpath;
+      unsigned int n;
+
+      if(argc > 1)
+            n = (tolower(*argv[1]) - 'a') + 1;
+      else  GetDrive(n);
+      
+      printf("curpath = '%s'\n", curpath = getdcwd(n));
+      if (curpath)
+            free(curpath);
+}
+
+#endif