From: Jason S. Ninneman <jsn@mbar.us>
Date: Mon, 3 Jul 2017 17:37:44 +0000 (-0700)
Subject: Upgrade get_vocab_id() to handle empty strings.
X-Git-Tag: takebird~57
X-Git-Url: https://jxself.org/git/?p=open-adventure.git;a=commitdiff_plain;h=07e7b8131ee6a4424cf269fe1ebc310037cf1d0f

Upgrade get_vocab_id() to handle empty strings.
---

diff --git a/advent.h b/advent.h
index 71b281e..72af32f 100644
--- a/advent.h
+++ b/advent.h
@@ -20,6 +20,7 @@
 #define PANICTIME      15         // time left after closing
 #define BATTERYLIFE    2500       // turn limit increment from batteries
 #define WORD_NOT_FOUND -1         // "Word not found" flag value for the vocab hash functions.
+#define WORD_EMPTY     0          // "Word empty" flag value for the vocab hash functions
 #define CARRIED        -1         // Player is toting it
 #define READ_MODE      "rb"       // b is not needed for POSIX but harmless
 #define WRITE_MODE     "wb"       // b is not needed for POSIX but harmless
diff --git a/misc.c b/misc.c
index 2b6a58b..6e3656f 100644
--- a/misc.c
+++ b/misc.c
@@ -483,6 +483,10 @@ int get_special_vocab_id(const char* word)
 long get_vocab_id(const char* word)
 // Search the vocab categories in order for the supplied word.
 {
+    /* Check for an empty string */
+    if (strncmp(word, "", sizeof("")) == 0)
+      return (WORD_EMPTY);
+
     long ref_num;
 
     /* FIXME: Magic numbers related to vocabulary */