Usermode/libc - Add isxdigit

diff --git a/Usermode/Libraries/libc.so_src/include_exp/ctype.h b/Usermode/Libraries/libc.so_src/include_exp/ctype.h
index 0d437e9..60753a6 100644 (file)
--- a/Usermode/Libraries/libc.so_src/include_exp/ctype.h
+++ b/Usermode/Libraries/libc.so_src/include_exp/ctype.h
@@ -40,6 +40,14 @@ static inline int isspace(int ch) {
        if(ch == '\n')  return 1;
        return 0;
 }
+
+static inline int isxdigit(int ch) {
+       if('0'<=ch&&ch<='9')    return 1;
+       if('a'<=ch&&ch<='f')    return 1;
+       if('F'<=ch&&ch<='F')    return 1;
+       return 0;
+}
+
 // C99
 static inline int isblank(int ch) {
        if(ch == ' ')   return 1;