minor tweaks
[flac.git] / src / metaflac / main.c
index 0590cdb..da74c30 100644 (file)
@@ -1056,29 +1056,29 @@ char *local_strdup(const char *source)
 FLAC__bool parse_md5(const char *src, FLAC__byte dest[16])
 {
        unsigned i, d;
-       char c;
+       int c;
        FLAC__ASSERT(0 != src);
        if(strlen(src) != 32)
                return false;
        /* strtoul() accepts negative numbers which we do not want, so we do it the hard way */
        for(i = 0; i < 16; i++) {
-               c = *src++;
+               c = (int)(*src++);
                if(isdigit(c))
-                       d = (unsigned)c - (unsigned)'0';
+                       d = (unsigned)(c - '0');
                else if(c >= 'a' && c <= 'f')
-                       d = (unsigned)c - (unsigned)'a' + 10u;
+                       d = (unsigned)(c - 'a') + 10u;
                else if(c >= 'A' && c <= 'F')
-                       d = (unsigned)c - (unsigned)'A' + 10u;
+                       d = (unsigned)(c - 'A') + 10u;
                else
                        return false;
                d <<= 4;
-               c = *src++;
+               c = (int)(*src++);
                if(isdigit(c))
-                       d |= (unsigned)c - (unsigned)'0';
+                       d |= (unsigned)(c - '0');
                else if(c >= 'a' && c <= 'f')
-                       d |= (unsigned)c - (unsigned)'a' + 10u;
+                       d |= (unsigned)(c - 'a') + 10u;
                else if(c >= 'A' && c <= 'F')
-                       d |= (unsigned)c - (unsigned)'A' + 10u;
+                       d |= (unsigned)(c - 'A') + 10u;
                else
                        return false;
                dest[i] = (FLAC__byte)d;