fixed compiler warnings on windows

1 files changed, 3 insertions, 3 deletions

diff --git a/src/parse.c b/src/parse.c
index f8749ac..b7596d4 100644
--- a/src/parse.c
+++ b/src/parse.c
@@ -82,7 +82,7 @@ symset_t* parse_symbols(char** str, int* sLine) {
 	symbolSet->count = 0;
 	while (1) {
 		/* clear whitespace */
-		while (!isalnum(**str) && **str != '"' && **str != '-' && **str != '(' && **str != ')' && **str != '\0') {
+		while (!isalnum((unsigned char)**str) && **str != '"' && **str != '-' && **str != '(' && **str != ')' && **str != '\0') {
 			/* increment line counter if newline read */
 			if (**str == '\n') {
 				(*sLine)++;
@@ -126,7 +126,7 @@ symset_t* parse_symbols(char** str, int* sLine) {
 					isFloat = 1;
 				}
 				/* we've hit a character that cannot be part of the symbol. parse the prior characters as the symbol name */
-				else if (!isalnum(**str) && **str != '-' && **str != '(') {
+				else if (!isalnum((unsigned char)**str) && **str != '-' && **str != '(') {
 					/* move the pointer back, because the close paren is needed to return the calling function */
 					if (**str == ')') {
 						(*str)--;
@@ -134,7 +134,7 @@ symset_t* parse_symbols(char** str, int* sLine) {
 					(*str)++;
 					symbolName[i] = '\0';
 					sym_t* symbol;
-					if (isalpha(symbolName[0])) {
+					if (isalpha((unsigned int)symbolName[0])) {
 						/* reference */
 						symbol = init_sym_key(symbolName);
 					}