Never pass a `char' to a ctype function. I had relied on gcc -Wall

[u/mdw/putty] / proxy.c

diff --git a/proxy.c b/proxy.c
index 0a61741..f334249 100644 (file)
--- a/proxy.c
+++ b/proxy.c
@@ -281,7 +281,7 @@ static int proxy_for_destination (SockAddr addr, char *hostname, int port,
 
     while (exclude_list[s]) {
        while (exclude_list[s] &&
-              (isspace(exclude_list[s]) ||
+              (isspace((unsigned char)exclude_list[s]) ||
                exclude_list[s] == ',')) s++;
 
        if (!exclude_list[s]) break;
@@ -289,7 +289,7 @@ static int proxy_for_destination (SockAddr addr, char *hostname, int port,
        e = s;
 
        while (exclude_list[e] &&
-              (isalnum(exclude_list[e]) ||
+              (isalnum((unsigned char)exclude_list[e]) ||
                exclude_list[e] == '-' ||
                exclude_list[e] == '.' ||
                exclude_list[e] == '*')) e++;
@@ -325,7 +325,7 @@ static int proxy_for_destination (SockAddr addr, char *hostname, int port,
 
        /* Make sure we really have reached the next comma or end-of-string */
        while (exclude_list[s] &&
-              !isspace(exclude_list[s]) &&
+              !isspace((unsigned char)exclude_list[s]) &&
               exclude_list[s] != ',') s++;
     }