MFB: fix strict aliasing issues

diff --git a/ext/date/lib/parse_tz.c b/ext/date/lib/parse_tz.c
index 4a70a70fdda536d11259dd992a7f0bcf2e6ea80a..72a33486abc3381495227dae7caceef49426a75f 100644 (file)
--- a/ext/date/lib/parse_tz.c
+++ b/ext/date/lib/parse_tz.c
@@ -45,7 +45,7 @@
 #define timelib_conv_int(l) ((l & 0x000000ff) << 24) + ((l & 0x0000ff00) << 8) + ((l & 0x00ff0000) >> 8) + ((l & 0xff000000) >> 24)
 #endif
 
-static void read_preamble(char **tzf, timelib_tzinfo *tz)
+static void read_preamble(const unsigned char **tzf, timelib_tzinfo *tz)
 {
        /* skip ID */
        *tzf += 4;
@@ -63,7 +63,7 @@ static void read_preamble(char **tzf, timelib_tzinfo *tz)
        *tzf += 13;
 }
 
-static void read_header(char **tzf, timelib_tzinfo *tz)
+static void read_header(const unsigned char **tzf, timelib_tzinfo *tz)
 {
        uint32_t buffer[6];
 
@@ -77,7 +77,7 @@ static void read_header(char **tzf, timelib_tzinfo *tz)
        *tzf += sizeof(buffer);
 }
 
-static void read_transistions(char **tzf, timelib_tzinfo *tz)
+static void read_transistions(const unsigned char **tzf, timelib_tzinfo *tz)
 {
        int32_t *buffer = NULL;
        uint32_t i;
@@ -106,7 +106,7 @@ static void read_transistions(char **tzf, timelib_tzinfo *tz)
        tz->trans_idx = cbuffer;
 }
 
-static void read_types(char **tzf, timelib_tzinfo *tz)
+static void read_types(const unsigned char **tzf, timelib_tzinfo *tz)
 {
        unsigned char *buffer;
        int32_t *leap_buffer;
@@ -187,7 +187,7 @@ static void read_types(char **tzf, timelib_tzinfo *tz)
        }
 }
 
-static void read_location(char **tzf, timelib_tzinfo *tz)
+static void read_location(const unsigned char **tzf, timelib_tzinfo *tz)
 {
        uint32_t buffer[3];
        uint32_t comments_len;
@@ -296,11 +296,11 @@ timelib_tzinfo *timelib_parse_tzfile(char *timezone, const timelib_tzdb *tzdb)
        if (seek_to_tz_position(&tzf, timezone, tzdb)) {
                tmp = timelib_tzinfo_ctor(timezone);
 
-               read_preamble((char**) &tzf, tmp);
-               read_header((char**) &tzf, tmp);
-               read_transistions((char**) &tzf, tmp);
-               read_types((char**) &tzf, tmp);
-               read_location((char**) &tzf, tmp);
+               read_preamble(&tzf, tmp);
+               read_header(&tzf, tmp);
+               read_transistions(&tzf, tmp);
+               read_types(&tzf, tmp);
+               read_location(&tzf, tmp);
        } else {
                tmp = NULL;
        }