commit c89b2247baeac7bf0c77260e90681f4ff542e72d
author aPiecek <piecek@cesnet.cz> Fri May 14 14:19:11 2021 +0200
committer Michal Vasko <mvasko@cesnet.cz> Fri May 14 14:57:18 2021 +0200
tree 446e0eb260f38b1574437d3009536bd63e800e54
parent a40b466e75360e03e799908c8bf36bb2db9b03e6

schema helpers BUGFIX added isprint protection

The standards require that the argument for isprint function is either
EOF or a value that is representable in the type unsigned char.

src/tree_schema_helpers.c

diff --git a/src/tree_schema_helpers.c b/src/tree_schema_helpers.c
index 7832354..64f8945 100644
--- a/src/tree_schema_helpers.c
+++ b/src/tree_schema_helpers.c
@@ -843,7 +843,7 @@
 {
     if (first || (prefix && ((*prefix) == 1))) {
         if (!is_yangidentstartchar(c)) {
-            if (isprint(c)) {
+            if ((c < UCHAR_MAX) && isprint(c)) {
                 LOGVAL_PARSER(ctx, LYVE_SYNTAX_YANG, "Invalid identifier first character '%c' (0x%04x).", (char)c, c);
             } else {
                 LOGVAL_PARSER(ctx, LYVE_SYNTAX_YANG, "Invalid identifier first character 0x%04x.", c);