libgo/runtime/go-string.h

   1 /* go-string.h -- the string type for Go.
   2
   3    Copyright 2009 The Go Authors. All rights reserved.
   4    Use of this source code is governed by a BSD-style
   5    license that can be found in the LICENSE file.  */
   6
   7 #ifndef LIBGO_GO_STRING_H
   8 #define LIBGO_GO_STRING_H
   9
  10 #include <stddef.h>
  11
  12 /* A string is an instance of this structure.  */
  13
  14 struct __go_string
  15 {
  16   /* The bytes.  */
  17   const unsigned char *__data;
  18   /* The length.  */
  19   int __length;
  20 };
  21
  22 static inline _Bool
  23 __go_strings_equal (struct __go_string s1, struct __go_string s2)
  24 {
  25   return (s1.__length == s2.__length
  26           && __builtin_memcmp (s1.__data, s2.__data, s1.__length) == 0);
  27 }
  28
  29 static inline _Bool
  30 __go_ptr_strings_equal (const struct __go_string *ps1,
  31                         const struct __go_string *ps2)
  32 {
  33   if (ps1 == NULL)
  34     return ps2 == NULL;
  35   if (ps2 == NULL)
  36     return 0;
  37   return __go_strings_equal (*ps1, *ps2);
  38 }
  39
  40 extern int __go_get_rune (const unsigned char *, size_t, int *);
  41
  42 #endif /* !defined(LIBGO_GO_STRING_H) */