Colors everywhere

hex.c

@@ -1,11 +1,8 @@
 #include <stdio.h>
 #include <ctype.h>
 
-// TODO: Position printing 
 // TODO: Stop appending garbage at file end
 // TODO: Skip repeating lines
-// TODO: Coloring printable ASCII characters in output
-// TODO: Stop scanning always for cmd & loc (for q and s commands)
 
 #define BYTES 1024
 #define BYTES_PER_LINE 20
@@ -14,7 +11,6 @@ void print_hex(unsigned char* buf, int byteno, int pos)
 {
   for (int i=0; i<byteno; i++)
   {
-    // Print line number here
     if (i % BYTES_PER_LINE == 0)
     {
       //printf("%03d:  ", lineno);
@@ -23,18 +19,15 @@ void print_hex(unsigned char* buf, int byteno, int pos)
         printf("  ");
         for (int j=i-BYTES_PER_LINE; j<i; j++)
         {
-          if (isprint(buf[j])) printf("%c", buf[j]);
+          if (isprint(buf[j])) printf("\x1b[33m%c\x1b[0m", buf[j]);
           else printf(".");
         }
       }
       puts("");
-      // Here, we could print positions in hex but I prefer using integers.
-      //printf("%04X  ", i);
-      
-      if (pos == 0) printf("%06d:   ", i);
-      else printf("%06d:   ", pos);
+      // Here, we could print positions in hex but I prefer using integers. printf("%04X  ", i); 
+      if (pos == 0) printf("\x1b[1;34m%06d:\x1b[0m   ", i);
+      else printf("\x1b[34m%06d:\x1b[0m   ", pos);
     }
-
     printf("%.2X ", buf[i]);
   }
 
@@ -45,17 +38,15 @@ void print_hex(unsigned char* buf, int byteno, int pos)
     for (int i=0; i<padding; i++) printf("   ");
     printf("  ");
   }
-
   int start = byteno - (byteno % BYTES_PER_LINE);
   for (int j = start; j < byteno; j++) {
     if (isprint(buf[j])) {
-      printf("%c", buf[j]);
+      printf("\x1b[33m%c\x1b[0m", buf[j]);
     }
     else {
       printf(".");
     }
   }
-
   puts("");
 }
 
@@ -77,7 +68,9 @@ int main(int argc, char** argv)
     char cmd;
     int loc;
      
-    scanf("%c%d", &cmd, &loc);
+    scanf(" %c", &cmd);
+    if (cmd == 'p' || cmd == 'P' || cmd == 'e' || cmd == 'E') scanf("%d", &loc);
+
     switch(cmd)
     {
       case 'p':

test.txt

@@ -1,3 +1,3 @@
-?ello, from a text file.
+?eÿlo, from a text file.
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