From af0d7f5ab90341f353d3632ee25e70e08ded0d69 Mon Sep 17 00:00:00 2001
From: Johannes Löthberg <johannes@kyriasis.com>
Date: Tue, 11 Nov 2014 01:35:00 +0100
Subject: Add parse_double function to utils.c

---
 src/utils.c | 22 ++++++++++++++++++++++
 src/utils.h |  3 +++
 2 files changed, 25 insertions(+)

diff --git a/src/utils.c b/src/utils.c
index d515b69..19d249d 100644
--- a/src/utils.c
+++ b/src/utils.c
@@ -53,6 +53,28 @@ parse_uint(char *string, char *arg)
 	return (unsigned int)val;
 }
 
+double
+parse_double(char *string, char *arg)
+{
+	errno = 0;
+	char *endptr;
+	double val = strtod(string, &endptr);
+	if (errno != 0) {
+		char *errormsg;
+		asprintf(&errormsg, "parse_double: failed to parse %s", arg);
+
+		perror(errormsg);
+		free(errormsg);
+		exit(-2);
+	}
+
+	if (endptr == string) {
+		fprintf(stderr, "Valid %s not found\n", arg);
+		exit(-2);
+	}
+	return val;
+}
+
 bool
 parse_color(char *hex, Color *c, int a)
 {
diff --git a/src/utils.h b/src/utils.h
index 50703b0..b21c6d5 100644
--- a/src/utils.h
+++ b/src/utils.h
@@ -10,6 +10,9 @@ parse_int(char *string, char *arg);
 unsigned
 parse_uint(char *string, char *arg);
 
+double
+parse_double(char *string, char *arg);
+
 bool
 parse_color(char *arg, Color *c, int a);
 
-- 
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