From: Karol Gugala <kgugala@antmicro.com>
Date: Wed, 27 Jan 2021 19:34:00 +0000 (+0100)
Subject: frontend: json: parse negative values
X-Git-Tag: working-ls180~74
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=cc7d18d29a5314c6350b7378bc788f48f3925337;p=yosys.git

frontend: json: parse negative values

Signed-off-by: Karol Gugala <kgugala@antmicro.com>
---

diff --git a/frontends/json/jsonparse.cc b/frontends/json/jsonparse.cc
index 1b34aaf3a..312f6d3be 100644
--- a/frontends/json/jsonparse.cc
+++ b/frontends/json/jsonparse.cc
@@ -72,10 +72,17 @@ struct JsonNode
 				break;
 			}
 
-			if ('0' <= ch && ch <= '9')
+			if (('0' <= ch && ch <= '9') || ch == '-')
 			{
+				bool negative = false;
 				type = 'N';
-				data_number = ch - '0';
+				if (ch == '-') {
+					data_number = 0;
+				       	negative = true;
+				} else {
+					data_number = ch - '0';
+				}
+
 				data_string += ch;
 
 				while (1)
@@ -97,6 +104,7 @@ struct JsonNode
 					data_string += ch;
 				}
 
+				data_number = negative ? -data_number : data_number;
 				data_string = "";
 				break;