shithub: scc

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Add option for signed characters

ansi c says that is implementation defined the signess of characters,
and since we have addede a c_sign bit in ctype, it is not a bad idea
adding a flag which allows to the user defines the signess of characters.
This patch also fixes the problem of filling c_sign in other integers
cases.

--- a/cc.h

+++ b/cc.h

@@ -13,6 +13,7 @@

 	unsigned char c99;

 	unsigned char useless;

 	unsigned char repeat;

+	unsigned char charsign;

 };

 extern  struct user_opt options;

--- a/decl.c

+++ b/decl.c

@@ -109,11 +109,24 @@

 			}

 			/* it is not a type name */

 		default:

-			if (!tp || tp->type)

-				return tp;

-			warning_error(options.implicit,

-			              "type defaults to 'int' in declaration");

-			tp->type = INT;

+			if (!tp)

+				return NULL;

+			if (!tp->type) {

+				warning_error(options.implicit,

+			                      "type defaults to 'int' in declaration");

+				tp->type = INT;

+			}

+			if (!tp->c_signed && !tp->c_unsigned) {

+				switch (tp->type) {

+				case CHAR:

+					if (!options.charsign) {

+						tp->c_unsigned = 1;

+						break;

+					}

+				case INT: case SHORT: case LONG: case LLONG:

+					tp->c_signed = 1;

+				}

+			}

 			return tp;

 		}

 	}

-- 

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