add comments about ignoring some warnings which are OK

diff --git a/archival/rpm.c b/archival/rpm.c
index 30cdc93fbe4faad9be68fb29c2850d4ac9c67c29..41c6129adb2e65a70d39f50e264350a6e5829db3 100644 (file)
--- a/archival/rpm.c
+++ b/archival/rpm.c
@@ -260,12 +260,16 @@ rpm_index **rpm_gettags(int fd, int *num_tags)
 int bsearch_rpmtag(const void *key, const void *item)
 {
        rpm_index **tmp = (rpm_index **) item;
+       /* gcc throws warnings here when sizeof(void*)!=sizeof(int) ...
+        * it's ok to ignore it because this isn't a 'real' pointer */
        return ((int) key - tmp[0]->tag);
 }
 
 int rpm_getcount(int tag)
 {
        rpm_index **found;
+       /* gcc throws warnings here when sizeof(void*)!=sizeof(int) ...
+        * it's ok to ignore it because tag won't be used as a pointer */
        found = bsearch((void *) tag, mytags, tagcount, sizeof(struct rpmtag *), bsearch_rpmtag);
        if (!found) return 0;
        else return found[0]->count;
@@ -274,6 +278,8 @@ int rpm_getcount(int tag)
 char *rpm_getstring(int tag, int itemindex)
 {
        rpm_index **found;
+       /* gcc throws warnings here when sizeof(void*)!=sizeof(int) ...
+        * it's ok to ignore it because tag won't be used as a pointer */
        found = bsearch((void *) tag, mytags, tagcount, sizeof(struct rpmtag *), bsearch_rpmtag);
        if (!found || itemindex >= found[0]->count) return NULL;
        if (found[0]->type == RPM_STRING_TYPE || found[0]->type == RPM_I18NSTRING_TYPE || found[0]->type == RPM_STRING_ARRAY_TYPE) {
@@ -288,6 +294,8 @@ int rpm_getint(int tag, int itemindex)
 {
        rpm_index **found;
        int n, *tmpint;
+       /* gcc throws warnings here when sizeof(void*)!=sizeof(int) ...
+        * it's ok to ignore it because tag won't be used as a pointer */
        found = bsearch((void *) tag, mytags, tagcount, sizeof(struct rpmtag *), bsearch_rpmtag);
        if (!found || itemindex >= found[0]->count) return -1;
        tmpint = (int *) (map + found[0]->offset);