scc

Simple C99 Compiler
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commit db2ea6a2cd2633a66d50471fc91181daff7db230
parent 6948a02f5fe8c3fea01ec49f314e68b6557e39e6
Author: Roberto E. Vargas Caballero <k0ga@shike2.com>
Date:   Fri,  5 Jul 2013 17:03:50 +0200

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.

Diffstat:
cc.h | 1+
decl.c | 23++++++++++++++++++-----
2 files changed, 19 insertions(+), 5 deletions(-)

diff --git a/cc.h b/cc.h @@ -13,6 +13,7 @@ struct user_opt { unsigned char c99; unsigned char useless; unsigned char repeat; + unsigned char charsign; }; extern struct user_opt options; diff --git a/decl.c b/decl.c @@ -109,11 +109,24 @@ spec(void) } /* 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; } }