+ if ((nm.num_msgs < 0) || (nm.msgnums == NULL)) {
+ cprintf("500 something bad happened\r\n");
+ return;
+ }
+
+ if ( (acmd == NNTP_LAST) && (nm.num_msgs == 0) ) {
+ cprintf("422 no previous article in this group\r\n"); // nothing here
+ }
+
+ else if ( (acmd == NNTP_LAST) && (nntpstate->current_article_number <= nm.msgnums[0]) ) {
+ cprintf("422 no previous article in this group\r\n"); // already at the beginning
+ }
+
+ else if (acmd == NNTP_LAST) {
+ for (i=0; ((i<nm.num_msgs)&&(selected_msgnum<=0)); ++i) {
+ if ( (nm.msgnums[i] >= nntpstate->current_article_number) && (i > 0) ) {
+ selected_msgnum = nm.msgnums[i-1];
+ }
+ }
+ if (selected_msgnum > 0) {
+ nntpstate->current_article_number = selected_msgnum;
+ message_id = message_id_from_msgnum(nntpstate->current_article_number);
+ cprintf("223 %ld <%s>\r\n", nntpstate->current_article_number, message_id);
+ if (message_id) free(message_id);
+ }
+ else {
+ cprintf("422 no previous article in this group\r\n");
+ }
+ }
+
+ else if ( (acmd == NNTP_NEXT) && (nm.num_msgs == 0) ) {
+ cprintf("421 no next article in this group\r\n"); // nothing here
+ }
+
+ else if ( (acmd == NNTP_NEXT) && (nntpstate->current_article_number >= nm.msgnums[nm.num_msgs-1]) ) {
+ cprintf("421 no next article in this group\r\n"); // already at the end
+ }
+
+ else if (acmd == NNTP_NEXT) {
+ for (i=0; ((i<nm.num_msgs)&&(selected_msgnum<=0)); ++i) {
+ if (nm.msgnums[i] > nntpstate->current_article_number) {
+ selected_msgnum = nm.msgnums[i];
+ }
+ }
+ if (selected_msgnum > 0) {
+ nntpstate->current_article_number = selected_msgnum;
+ message_id = message_id_from_msgnum(nntpstate->current_article_number);
+ cprintf("223 %ld <%s>\r\n", nntpstate->current_article_number, message_id);
+ if (message_id) free(message_id);
+ }
+ else {
+ cprintf("421 no next article in this group\r\n");
+ }