Initial revision

diff --git a/lib/xstrtol.h b/lib/xstrtol.h
new file mode 100644 (file)
index 0000000..7a9a024
--- /dev/null
+++ b/lib/xstrtol.h
@@ -0,0 +1,64 @@
+#ifndef XSTRTOL_H_
+# define XSTRTOL_H_ 1
+
+# if HAVE_INTTYPES_H
+#  include <inttypes.h> /* for uintmax_t */
+# endif
+
+# ifndef PARAMS
+#  if defined PROTOTYPES || (defined __STDC__ && __STDC__)
+#   define PARAMS(Args) Args
+#  else
+#   define PARAMS(Args) ()
+#  endif
+# endif
+
+# ifndef _STRTOL_ERROR
+enum strtol_error
+  {
+    LONGINT_OK, LONGINT_INVALID, LONGINT_INVALID_SUFFIX_CHAR, LONGINT_OVERFLOW
+  };
+typedef enum strtol_error strtol_error;
+# endif
+
+# define _DECLARE_XSTRTOL(name, type) \
+  strtol_error \
+    name PARAMS ((const char *s, char **ptr, int base, \
+                 type *val, const char *valid_suffixes));
+_DECLARE_XSTRTOL (xstrtol, long int)
+_DECLARE_XSTRTOL (xstrtoul, unsigned long int)
+_DECLARE_XSTRTOL (xstrtoumax, uintmax_t)
+
+# define _STRTOL_ERROR(Exit_code, Str, Argument_type_string, Err)      \
+  do                                                                   \
+    {                                                                  \
+      switch ((Err))                                                   \
+       {                                                               \
+       case LONGINT_OK:                                                \
+         abort ();                                                     \
+                                                                       \
+       case LONGINT_INVALID:                                           \
+         error ((Exit_code), 0, "invalid %s `%s'",                     \
+                (Argument_type_string), (Str));                        \
+         break;                                                        \
+                                                                       \
+       case LONGINT_INVALID_SUFFIX_CHAR:                               \
+         error ((Exit_code), 0, "invalid character following %s `%s'", \
+                (Argument_type_string), (Str));                        \
+         break;                                                        \
+                                                                       \
+       case LONGINT_OVERFLOW:                                          \
+         error ((Exit_code), 0, "%s `%s' too large",                   \
+                (Argument_type_string), (Str));                        \
+         break;                                                        \
+       }                                                               \
+    }                                                                  \
+  while (0)
+
+# define STRTOL_FATAL_ERROR(Str, Argument_type_string, Err)            \
+  _STRTOL_ERROR (2, Str, Argument_type_string, Err)
+
+# define STRTOL_FAIL_WARN(Str, Argument_type_string, Err)              \
+  _STRTOL_ERROR (0, Str, Argument_type_string, Err)
+
+#endif /* not XSTRTOL_H_ */