cast (char) to (unsigned char) to silence (char) array index warnings.

diff --git a/common/conflex.c b/common/conflex.c
index 378116577ab83c1a0c1a86eab01c3cc9606b06f7..661c8c3ed62a1d3887910f47b85b95aa9d49421c 100644 (file)
--- a/common/conflex.c
+++ b/common/conflex.c
@@ -726,12 +726,14 @@ intern(char *atom, enum dhcp_token dfv) {
                }
                if (!strcasecmp(atom + 1, "fter"))
                        return AFTER;
-               if (isascii(atom[1]) && (tolower(atom[1]) == 'l')) {
+               if (isascii(atom[1]) &&
+                   (tolower((unsigned char)atom[1]) == 'l')) {
                        if (!strcasecmp(atom + 2, "gorithm"))
                                return ALGORITHM;
                        if (!strcasecmp(atom + 2, "ias"))
                                return ALIAS;
-                       if (isascii(atom[2]) && (tolower(atom[2]) == 'l')) {
+                       if (isascii(atom[2]) &&
+                           (tolower((unsigned char)atom[2]) == 'l')) {
                                if (atom[3] == '\0')
                                        return ALL;
                                else if (!strcasecmp(atom + 3, "ow"))
@@ -742,7 +744,8 @@ intern(char *atom, enum dhcp_token dfv) {
                                return TOKEN_ALSO;
                        break;
                }
-               if (isascii(atom[1]) && (tolower(atom[1]) == 'n')) {
+               if (isascii(atom[1]) &&
+                   (tolower((unsigned char)atom[1]) == 'n')) {
                        if (!strcasecmp(atom + 2, "d"))
                                return AND;
                        if (!strcasecmp(atom + 2, "ycast-mac"))
@@ -753,7 +756,8 @@ intern(char *atom, enum dhcp_token dfv) {
                        return APPEND;
                if (!strcasecmp(atom + 1, "rray"))
                        return ARRAY;
-               if (isascii(atom[1]) && (tolower(atom[1]) == 't')) {
+               if (isascii(atom[1]) &&
+                   (tolower((unsigned char)atom[1]) == 't')) {
                        if (atom[2] == '\0')
                                return AT;
                        if (!strcasecmp(atom + 2, "sfp"))
@@ -761,7 +765,8 @@ intern(char *atom, enum dhcp_token dfv) {
                        break;
                }
                if (!strncasecmp(atom + 1, "ut", 2)) {
-                       if (isascii(atom[3] && (tolower(atom[3]) == 'h'))) {
+                       if (isascii(atom[3] &&
+                           (tolower((unsigned char)atom[3]) == 'h'))) {
                                if (!strncasecmp(atom + 4, "enticat", 7)) {
                                        if (!strcasecmp(atom + 11, "ed"))
                                                return AUTHENTICATED;
@@ -1240,7 +1245,8 @@ intern(char *atom, enum dhcp_token dfv) {
                        return RANGE;
                if (!strcasecmp(atom + 1, "ange6"))
                        return RANGE6;
-               if (isascii(atom[1]) && (tolower(atom[1]) == 'e')) {
+               if (isascii(atom[1]) &&
+                   (tolower((unsigned char)atom[1]) == 'e')) {
                        if (!strcasecmp(atom + 2, "bind"))
                                return REBIND;
                        if (!strcasecmp(atom + 2, "boot"))
@@ -1274,7 +1280,8 @@ intern(char *atom, enum dhcp_token dfv) {
                                return REQUEST;
                        if (!strcasecmp(atom + 2, "quire"))
                                return REQUIRE;
-                       if (isascii(atom[2]) && (tolower(atom[2]) == 's')) {
+                       if (isascii(atom[2]) &&
+                           (tolower((unsigned char)atom[2]) == 's')) {
                                if (!strcasecmp(atom + 3, "erved"))
                                        return TOKEN_RESERVED;
                                if (!strcasecmp(atom + 3, "et"))