X-Git-Url: https://git.exim.org/exim.git/blobdiff_plain/f1e5fef536bdc2c5d84c4bc7852d6e948253ccaf..c4ceed07f17f67af7d96e7fd27c92eb374e62e19:/src/src/string.c

diff --git a/src/src/string.c b/src/src/string.c
index 49ffc9685..9764d3e38 100644
--- a/src/src/string.c
+++ b/src/src/string.c
@@ -1,10 +1,8 @@
-/* $Cambridge: exim/src/src/string.c,v 1.15 2009/11/16 19:50:37 nm4 Exp $ */
-
 /*************************************************
 *     Exim - an Internet mail transport agent    *
 *************************************************/
 
-/* Copyright (c) University of Cambridge 1995 - 2009 */
+/* Copyright (c) University of Cambridge 1995 - 2012 */
 /* See the file NOTICE for conditions of use and distribution. */
 
 /* Miscellaneous string-handling functions. Some are not required for
@@ -212,7 +210,6 @@ return yield;
 
 
 
-#ifndef COMPILE_UTILITY
 /*************************************************
 *          Interpret escape sequence             *
 *************************************************/
@@ -229,6 +226,9 @@ Returns:   the value of the character escape
 int
 string_interpret_escape(uschar **pp)
 {
+#ifdef COMPILE_UTILITY
+const uschar *hex_digits= CUS"0123456789abcdef";
+#endif
 int ch;
 uschar *p = *pp;
 ch = *(++p);
@@ -244,9 +244,12 @@ if (isdigit(ch) && ch != '8' && ch != '9')
   }
 else switch(ch)
   {
+  case 'b':  ch = '\b'; break;
+  case 'f':  ch = '\f'; break;
   case 'n':  ch = '\n'; break;
   case 'r':  ch = '\r'; break;
   case 't':  ch = '\t'; break;
+  case 'v':  ch = '\v'; break;
   case 'x':
   ch = 0;
   if (isxdigit(p[1]))
@@ -261,7 +264,6 @@ else switch(ch)
 *pp = p;
 return ch;
 }
-#endif  /* COMPILE_UTILITY */
 
 
 
@@ -333,6 +335,72 @@ return ss;
 }
 #endif  /* COMPILE_UTILITY */
 
+/*************************************************
+*        Undo printing escapes in string         *
+*************************************************/
+
+/* This function is the reverse of string_printing2.  It searches for
+backslash characters and if any are found, it makes a new copy of the
+string with escape sequences parsed.  Otherwise it returns the original
+string.
+
+Arguments:
+  s             the input string
+
+Returns:        string with printing escapes parsed back
+*/
+
+uschar *
+string_unprinting(uschar *s)
+{
+uschar *p, *q, *r, *ss;
+int len, off;
+
+p = Ustrchr(s, '\\');
+if (!p) return s;
+
+len = Ustrlen(s) + 1;
+ss = store_get(len);
+
+q = ss;
+off = p - s;
+if (off)
+  {
+  memcpy(q, s, off);
+  q += off;
+  }
+
+while (*p)
+  {
+  if (*p == '\\')
+    {
+    *q = string_interpret_escape(&p);
+    }
+  else
+    {
+    r = Ustrchr(p, '\\');
+    if (!r)
+      {
+      off = Ustrlen(p);
+      memcpy(q, p, off);
+      p += off;
+      q += off;
+      break;
+      }
+    else
+      {
+      off = r - p;
+      memcpy(q, p, off);
+      q += off;
+      p = r;
+      }
+    }
+  }
+*q = '\0';
+
+return ss;
+}
+
 
 
 
@@ -347,7 +415,7 @@ Returns:  copy of string in new store
 */
 
 uschar *
-string_copy(uschar *s)
+string_copy(const uschar *s)
 {
 int len = Ustrlen(s) + 1;
 uschar *ss = store_get(len);
@@ -641,7 +709,7 @@ Returns:    pointer to fresh piece of store containing sprintf'ed string
 */
 
 uschar *
-string_sprintf(char *format, ...)
+string_sprintf(const char *format, ...)
 {
 va_list ap;
 uschar buffer[STRING_SPRINTF_BUFFER_SIZE];
@@ -669,7 +737,7 @@ Returns:    < 0, = 0, or > 0, according to the comparison
 */
 
 int
-strncmpic(uschar *s, uschar *t, int n)
+strncmpic(const uschar *s, const uschar *t, int n)
 {
 while (n--)
   {
@@ -693,7 +761,7 @@ Returns:    < 0, = 0, or > 0, according to the comparison
 */
 
 int
-strcmpic(uschar *s, uschar *t)
+strcmpic(const uschar *s, const uschar *t)
 {
 while (*s != 0)
   {
@@ -1052,7 +1120,7 @@ Returns:       TRUE if the result fitted in the buffer
 */
 
 BOOL
-string_format(uschar *buffer, int buflen, char *format, ...)
+string_format(uschar *buffer, int buflen, const char *format, ...)
 {
 BOOL yield;
 va_list ap;
@@ -1064,13 +1132,13 @@ return yield;
 
 
 BOOL
-string_vformat(uschar *buffer, int buflen, char *format, va_list ap)
+string_vformat(uschar *buffer, int buflen, const char *format, va_list ap)
 {
 enum { L_NORMAL, L_SHORT, L_LONG, L_LONGLONG, L_LONGDOUBLE };
 
 BOOL yield = TRUE;
 int width, precision;
-char *fp = format;             /* Deliberately not unsigned */
+const char *fp = format;       /* Deliberately not unsigned */
 uschar *p = buffer;
 uschar *last = buffer + buflen - 1;
 
@@ -1085,8 +1153,8 @@ while (*fp != 0)
   int length = L_NORMAL;
   int *nptr;
   int slen;
-  char *null = "NULL";         /* ) These variables */
-  char *item_start, *s;        /* ) are deliberately */
+  const char *null = "NULL";   /* ) These variables */
+  const char *item_start, *s;  /* ) are deliberately */
   char newformat[16];          /* ) not unsigned */
 
   /* Non-% characters just get copied verbatim */
@@ -1340,7 +1408,7 @@ Returns:        a message, in dynamic store
 */
 
 uschar *
-string_open_failed(int eno, char *format, ...)
+string_open_failed(int eno, const char *format, ...)
 {
 va_list ap;
 uschar buffer[1024];