iris

commit 4b6f5b43e5e70b0128e966790b142ab38b8cf4af
parent ef4d9841c21e8b70e80e3c3881f96faa1c194c34
Author: sin <sin@2f30.org>
Date:   Fri,  9 May 2014 14:13:46 +0100

Add support for signed numbers

No floating point at the moment.

Diffstat:
M
lexer.c
 | 
12
++++++++++++

1 file changed, 12 insertions(+), 0 deletions(-)
diff --git a/lexer.c b/lexer.c
@@ -11,6 +11,7 @@ enum state {
 	State_Probable_Boolean,
 	State_Boolean,
 	State_Number,
+	State_Signed_Number,
 	State_Probable_Character,
 	State_Character,
 	State_Probable_String,
@@ -66,6 +67,8 @@ gettok(struct lexerctx *ctx, const char *buf, size_t len)
 				state = State_Probable_Boolean;
 			else if (isdigit(*ctx->e) != 0)
 				state = State_Number;
+			else if (*ctx->e == '-' || *ctx->e == '+')
+				state = State_Signed_Number;
 			else if (*ctx->e == '"')
 				state = State_Probable_String;
 			else if (*ctx->e == '(')
@@ -134,6 +137,15 @@ gettok(struct lexerctx *ctx, const char *buf, size_t len)
 				return tok;
 			}
 			break;
+		case State_Signed_Number:
+			if (isdigit(*ctx->e) == 0) {
+				tok.type = Error;
+				tok.s = "not a number";
+				tok.e = NULL;
+				return tok;
+			}
+			state = State_Number;
+			break;
 		case State_Probable_Character:
 			if (isalpha(*ctx->e) != 0) {
 				state = State_Character;