1 files changed, 88 insertions, 0 deletions
diff --git a/reference/C/CONTRIB/SNIP/hexdump.c b/reference/C/CONTRIB/SNIP/hexdump.c
new file mode 100755
index 0000000..bb90b7a
--- /dev/null
+++ b/reference/C/CONTRIB/SNIP/hexdump.c
@@ -0,0 +1,88 @@
+/*
+**  HEXDUMP.C - Dump a file.
+**
+**  This Program Written By Paul Edwards w/ modifications by Bob Stout
+**  Released to the public domain
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+
+static void dodump(FILE *fp, long start, long count);
+static void skipb(FILE *fp, long start);
+
+main(int argc, char **argv)
+{
+      FILE *fp;
+      long start, count;
+
+      if (argc < 2)
+      {
+            puts("Usage: HEXDUMP file_name [start] [length]");
+            return (EXIT_FAILURE);
+      }
+      if (argc > 2)
+            start = atol(*(argv + 2));
+      else  start = 0L;
+      if (argc > 3)
+            count = atol(*(argv + 3));
+      else  count = -1L;
+      fp = fopen(*(argv + 1), "rb");
+      if (fp == NULL)
+      {
+            printf("unable to open file %s for input\n", *(argv+1));
+            return (EXIT_FAILURE);
+      }
+      skipb(fp, start);
+      dodump(fp, start, count);
+      return (EXIT_SUCCESS);
+}
+
+static void dodump(FILE *fp, long start, long count)
+{
+      int c, pos1, pos2;
+      long x = 0L;
+      char prtln[100];
+
+      while (((c = fgetc(fp)) != EOF) && (x != count))
+      {
+            if (x%16 == 0)
+            {
+                  memset(prtln,' ',sizeof prtln);
+                  sprintf(prtln,"%0.6X   ", start + x);
+                  pos1 = 8;
+                  pos2 = 45;
+            }
+            sprintf(prtln + pos1, "%0.2X", c);
+            if (isprint(c))
+                  sprintf(prtln + pos2, "%c", c);
+            else  sprintf(prtln + pos2, ".");
+            pos1 += 2;
+            *(prtln+pos1) = ' ';
+            pos2++;
+            if (x % 4 == 3)
+                  *(prtln + pos1++) = ' ';
+            if (x % 16 == 15)
+                  printf("%s\n", prtln);
+            x++;
+      }
+      if (x % 16 != 15)
+            printf("%s\n", prtln);
+      return;
+}
+
+static void skipb(FILE *fp, long start)
+{
+      long x = 0;
+
+      if (start == 0)
+            return;
+      while (x < start)
+      {
+            fgetc(fp);
+            x++;
+      }
+      return;
+}