1 files changed, 20 insertions, 19 deletions

diff --git a/libbb/process_escape_sequence.c b/libbb/process_escape_sequence.c
index 9a16f80ab..ef2717bdd 100644
--- a/libbb/process_escape_sequence.c
+++ b/libbb/process_escape_sequence.c
@@ -2,7 +2,7 @@
 /*
  * Utility routines.
  *
- * Copyright (C) Manuel Nova III <mnovoa3@bellsouth.net>
+ * Copyright (C) Manuel Novoa III <mjn3@codepoet.org>
  * and Vladimir Oleynik <dzo@simtreas.ru>
  *
  * This program is free software; you can redistribute it and/or modify
@@ -26,9 +26,7 @@
 #include <limits.h>
 #include "libbb.h"
 
-
-
-char process_escape_sequence(const char **ptr)
+char bb_process_escape_sequence(const char **ptr)
 {
         static const char charmap[] = {
                 'a',  'b',  'f',  'n',  'r',  't',  'v',  '\\', 0,
@@ -36,40 +34,43 @@ char process_escape_sequence(const char **ptr)
 
         const char *p;
         const char *q;
-        int num_digits;
+        unsigned int num_digits;
+        unsigned int r;
         unsigned int n;
         
         n = 0;
         q = *ptr;
 
-        for ( num_digits = 0 ; num_digits < 3 ; ++num_digits) {
-                if ((*q < '0') || (*q > '7')) { /* not a digit? */
-                        break;
+        num_digits = 0;
+        do {
+                if (((unsigned int)(*q - '0')) <= 7) {
+                        r = n * 8 + (*q - '0');
+                        if (r <= UCHAR_MAX) {
+                                n = r;
+                                ++q;
+                                if (++num_digits < 3) {
+                                        continue;
+                                }
+                        }
                 }
-                n = n * 8 + (*q++ - '0');
-        }
+                break;
+        } while (1);
 
         if (num_digits == 0) {  /* mnemonic escape sequence? */
-                for (p=charmap ; *p ; p++) {
+                p = charmap;
+                do {
                         if (*p == *q) {
                                 q++;
                                 break;
                         }
-                }
+                } while (*++p);
                 n = *(p+(sizeof(charmap)/2));
         }
 
-           /* doesn't hurt to fall through to here from mnemonic case */
-        if (n > UCHAR_MAX) {    /* is octal code too big for a char? */
-                n /= 8;                 /* adjust value and */
-                --q;                            /* back up one char */
-        }
-
         *ptr = q;
         return (char) n;
 }
 
-
 /* END CODE */
 /*
 Local Variables: