+
+## ------------ ##
+## Data Types. ##
+## ------------ ##
+
+# b4_int_type(MIN, MAX)
+# ---------------------
+# Return the smallest int type able to handle numbers ranging from
+# MIN to MAX (included). We overwrite the version from c.m4 which relies
+# on `signed char' which is not portable to old K&R compilers.
+m4_define([b4_int_type],
+[m4_if(b4_ints_in($@, [0], [255]), [1], [unsigned char],
+ b4_ints_in($@, [-128], [127]), [1], [yysigned_char],
+
+ b4_ints_in($@, [0], [65535]), [1], [unsigned short],
+ b4_ints_in($@, [-32768], [32767]), [1], [short],
+
+ m4_eval([0 <= $1]), [1], [unsigned int],
+
+ [int])])
+
+