Ready for 1.6 release.

[open-adventure.git] / misc.c

diff --git a/misc.c b/misc.c
index 302e61cc641d4faeac7b176839ddd2aa05cac9a1..0e6b50e535b6365f7457ec0d50d59aa50edbc929 100644 (file)
--- a/misc.c
+++ b/misc.c
@@ -1,3 +1,11 @@
+/*
+ * I/O and support riutines.
+ *
+ * Copyright (c) 1977, 2005 by Will Crowther and Don Woods
+ * Copyright (c) 2017 by Eric S. Raymond
+ * SPDX-License-Identifier: BSD-2-clause
+ */
+     
 #include <unistd.h>
 #include <stdlib.h>
 #include <stdio.h>
@@ -413,60 +421,65 @@ static bool is_valid_int(const char *str)
     return true;
 }
 
-static void get_vocab_metadata(command_word_t* word)
+static void get_vocab_metadata(const char* word, vocab_t* id, word_type_t* type)
 {
     /* Check for an empty string */
-    if (strncmp(word->raw, "", sizeof("")) == 0) {
-        word->id = WORD_EMPTY;
-        word->type = NO_WORD_TYPE;
+    if (strncmp(word, "", sizeof("")) == 0) {
+        *id = WORD_EMPTY;
+        *type = NO_WORD_TYPE;
         return;
     }
 
     vocab_t ref_num;
 
-    ref_num = get_motion_vocab_id(word->raw);
+    ref_num = get_motion_vocab_id(word);
     if (ref_num != WORD_NOT_FOUND) {
-        word->id = ref_num;
-        word->type = MOTION;
+        *id = ref_num;
+        *type = MOTION;
         return;
     }
 
-    ref_num = get_object_vocab_id(word->raw);
+    ref_num = get_object_vocab_id(word);
     if (ref_num != WORD_NOT_FOUND) {
-        word->id = ref_num;
-        word->type = OBJECT;
+        *id = ref_num;
+        *type = OBJECT;
         return;
     }
 
-    ref_num = get_action_vocab_id(word->raw);
+    ref_num = get_action_vocab_id(word);
     if (ref_num != WORD_NOT_FOUND) {
-        word->id = ref_num;
-        word->type = ACTION;
+        *id = ref_num;
+        *type = ACTION;
         return;
     }
 
     // Check for the reservoir magic word.
-    if (strcasecmp(word->raw, game.zzword) == 0) {
-        word->id = PART;
-        word->type = ACTION;
+    if (strcasecmp(word, game.zzword) == 0) {
+        *id = PART;
+        *type = ACTION;
         return;
     }
 
     // Check words that are actually numbers.
-    if (is_valid_int(word->raw)) {
-        word->id = WORD_EMPTY;
-        word->type = NUMERIC;
+    if (is_valid_int(word)) {
+        *id = WORD_EMPTY;
+        *type = NUMERIC;
         return;
     }
 
-    word->id = WORD_NOT_FOUND;
-    word->type = NO_WORD_TYPE;
+    *id = WORD_NOT_FOUND;
+    *type = NO_WORD_TYPE;
     return;
 }
 
 static void tokenize(char* raw, command_t *cmd)
 {
-    memset(cmd, '\0', sizeof(command_t));
+    /*
+     * Be caereful about modifing this. We do not want to nuke the
+     * the speech part or ID from the previous turn. 
+     */
+    memset(&cmd->word[0].raw, '\0', sizeof(cmd->word[0],raw));
+    memset(&cmd->word[1].raw, '\0', sizeof(cmd->word[1].raw));
 
     /* Bound prefix on the %s would be needed to prevent buffer
      * overflow.  but we shortstop this more simply by making each
@@ -496,8 +509,8 @@ static void tokenize(char* raw, command_t *cmd)
     }
 
     /* populate command with parsed vocabulary metadata */
-    get_vocab_metadata(&(cmd->word[0]));
-    get_vocab_metadata(&(cmd->word[1]));
+    get_vocab_metadata(cmd->word[0].raw, &(cmd->word[0].id), &(cmd->word[0].type));
+    get_vocab_metadata(cmd->word[1].raw, &(cmd->word[1].id), &(cmd->word[1].type));
 }
 
 bool get_command_input(command_t *command)
@@ -577,7 +590,9 @@ void carry(obj_t object, loc_t where)
         if (game.place[object] == CARRIED)
             return;
         game.place[object] = CARRIED;
-        ++game.holdng;
+       
+       if (object!= BIRD)
+           ++game.holdng;
     }
     if (game.atloc[where] == object) {
         game.atloc[where] = game.link[object];
@@ -598,7 +613,14 @@ void drop(obj_t object, loc_t where)
         game.fixed[object - NOBJECTS] = where;
     else {
         if (game.place[object] == CARRIED)
-            --game.holdng;
+           if (object != BIRD)
+               /* The bird has to be weightless.  This ugly hack (and the
+                * corresponding code in the drop function) brought to you
+                * by the fact that when the bird is caged, we need to be able
+                * to either 'take bird' or 'take cage' and have the right thing
+                * happen.
+                */
+               --game.holdng;
         game.place[object] = where;
     }
     if (where == LOC_NOWHERE ||
@@ -646,8 +668,10 @@ bool tstbit(long mask, int bit)
 void set_seed(int32_t seedval)
 /* Set the LCG seed */
 {
-    game.lcg_x = (uint32_t) seedval % LCG_M;
-
+    game.lcg_x = seedval % LCG_M;
+    if (game.lcg_x < 0) {
+        game.lcg_x = LCG_M + game.lcg_x;
+    }
     // once seed is set, we need to generate the Z`ZZZ word
     for (int i = 0; i < 5; ++i) {
         game.zzword[i] = 'A' + randrange(26);