documents: org name in the invoice and payslip headers, document_header_colorv0.1.63

1 files changed, 13 insertions, 0 deletions

diff --git a/src/util.c b/src/util.c
index 9543875..7882642 100644
--- a/src/util.c
+++ b/src/util.c
@@ -276,6 +276,19 @@ char *util_str_trim(char *s)
     return s;
 }
 
+int util_hex_color_valid(const char *s)
+{
+    if (!s || s[0] != '#' || strlen(s) != 7)
+        return 0;
+    for (int i = 1; i < 7; i++) {
+        char c = s[i];
+        if (!((c >= '0' && c <= '9') || (c >= 'a' && c <= 'f') ||
+              (c >= 'A' && c <= 'F')))
+            return 0;
+    }
+    return 1;
+}
+
 static int is_leap(int y)
 {
     return (y % 4 == 0 && y % 100 != 0) || y % 400 == 0;