server/unicode.c

   1 /*
   2  * Unicode routines for use inside the server
   3  *
   4  * Copyright (C) 1999 Alexandre Julliard
   5  */
   6
   7 #include <ctype.h>
   8 #include <stdio.h>
   9
  10 #include "unicode.h"
  11
  12 /* dump a Unicode string with proper escaping */
  13 int dump_strW( const WCHAR *str, size_t len, FILE *f, char escape[2] )
  14 {
  15     static const char escapes[32] = ".......abtnvfr.............e....";
  16     char buffer[256];
  17     char *pos = buffer;
  18     int count = 0;
  19
  20     for (; len; str++, len--)
  21     {
  22         if (pos > buffer + sizeof(buffer) - 8)
  23         {
  24             fwrite( buffer, pos - buffer, 1, f );
  25             count += pos - buffer;
  26             pos = buffer;
  27         }
  28         if (*str > 127)  /* hex escape */
  29         {
  30             if (len > 1 && str[1] < 128 && isxdigit((char)str[1]))
  31                 pos += sprintf( pos, "\\x%04x", *str );
  32             else
  33                 pos += sprintf( pos, "\\x%x", *str );
  34             continue;
  35         }
  36         if (*str < 32)  /* octal or C escape */
  37         {
  38             if (!*str && len == 1) continue;  /* do not output terminating NULL */
  39             if (escapes[*str] != '.')
  40                 pos += sprintf( pos, "\\%c", escapes[*str] );
  41             else if (len > 1 && str[1] >= '0' && str[1] <= '7')
  42                 pos += sprintf( pos, "\\%03o", *str );
  43             else
  44                 pos += sprintf( pos, "\\%o", *str );
  45             continue;
  46         }
  47         if (*str == '\\' || *str == escape[0] || *str == escape[1]) *pos++ = '\\';
  48         *pos++ = *str;
  49     }
  50     fwrite( buffer, pos - buffer, 1, f );
  51     count += pos - buffer;
  52     return count;
  53 }