stringbuffers: allow "" strings, keep disallowing NULL strings.

Now, bufstr_set'ing an item to string_null will yield string_null on bufstr_get,
and bufstr_set'ing an item to "" will yield "" on bufstr_get.

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@10184 d7cf8633-e32d-0410-b094-e92efae38249

diff --git a/prvm_cmds.c b/prvm_cmds.c
index a7450c6a2d20d4387f3babb896bdc9caa311a882..bd6c751bc8737efcf07d141d53e073cf201eb3ce 100644 (file)
--- a/prvm_cmds.c
+++ b/prvm_cmds.c
@@ -4734,6 +4734,7 @@ void bufstr_set(float bufhandle, float string_index, string str) = #466;
 */
 void VM_bufstr_set (void)
 {
+       size_t alloclen;
        int                             strindex;
        prvm_stringbuffer_t *stringbuffer;
        const char              *news;
@@ -4760,10 +4761,11 @@ void VM_bufstr_set (void)
                Mem_Free(stringbuffer->strings[strindex]);
        stringbuffer->strings[strindex] = NULL;
 
-       news = PRVM_G_STRING(OFS_PARM2);
-       if (news && news[0])
+       if(PRVM_G_INT(OFS_PARM2))
        {
-               size_t alloclen = strlen(news) + 1;
+               // not the NULL string!
+               news = PRVM_G_STRING(OFS_PARM2);
+               alloclen = strlen(news) + 1;
                stringbuffer->strings[strindex] = (char *)Mem_Alloc(prog->progs_mempool, alloclen);
                memcpy(stringbuffer->strings[strindex], news, alloclen);
        }
@@ -4795,12 +4797,12 @@ void VM_bufstr_add (void)
                VM_Warning("VM_bufstr_add: invalid buffer %i used in %s\n", (int)PRVM_G_FLOAT(OFS_PARM0), PRVM_NAME);
                return;
        }
-       string = PRVM_G_STRING(OFS_PARM1);
-       if(!string || !string[0])
+       if(!PRVM_G_INT(OFS_PARM1)) // NULL string
        {
                VM_Warning("VM_bufstr_add: can not add an empty string to buffer %i in %s\n", (int)PRVM_G_FLOAT(OFS_PARM0), PRVM_NAME);
                return;
        }
+       string = PRVM_G_STRING(OFS_PARM1);
        order = (int)PRVM_G_FLOAT(OFS_PARM2);
        if(order)
                strindex = stringbuffer->num_strings;