Off by one error in the interface.

src/kjv.h

@@ -86,6 +86,11 @@ union kjvcite {
 
 
 #ifndef KJV_OMIT_VERSES /* <!-- verses: For external inclusion. */
+struct table_kjvset_bucket;
+struct kjvset_table {
+	struct table_kjvset_bucket *buckets;
+	uint32_t log_capacity, size, top;
+};
 struct table_verse_bucket;
 struct verse_table {
 	struct table_verse_bucket *buckets;
@@ -98,11 +103,16 @@ struct verse_table {
 
 #ifndef KJV_OMIT_PROTO /* <!-- proto */
 #include <stddef.h>
-struct kjv { struct verse_table verses; size_t words; };
+struct kjv {
+	struct kjvset_table set;
+	struct verse_table verses;
+	size_t total_words, set_words;
+};
 struct kjv kjv(void);
 void kjv_(struct kjv *);
-unsigned kjv_words(/*const*/ struct kjv *const kjv, const union kjvcite cite);
-const char *kjv_entire_to_string(const struct kjv *const kjv);
+int kjv_add(struct kjv *const kjv, const union kjvcite cite);
+const char *kjv_to_string(const struct kjv *const kjv);
+const char *kjv_set_to_string(const struct kjv *const kjv);
 #else /* proto --><!-- !proto */
 #undef KJV_OMIT_PROTO
 #endif /* !proto --> */

src/kjv.re_c.c

@@ -41,13 +41,13 @@ static uint32_t lowbias32_r(uint32_t x) {
 	return x;
 }
 
-static uint32_t kjv_hash(const union kjvcite x) { return lowbias32(x.u32); }
-static union kjvcite kjv_unhash(const uint32_t x)
+static uint32_t kjvset_hash(const union kjvcite x) { return lowbias32(x.u32); }
+static union kjvcite kjvset_unhash(const uint32_t x)
 	{ union kjvcite k; k.u32 = lowbias32_r(x); return k; }
-static void kjv_to_string(const union kjvcite x, char (*const a)[12])
+static void kjvset_to_string(const union kjvcite x, char (*const a)[12])
 	{ sprintf(*a, "%.4s%u:%u", kjv_book_string[x.book],
 	(x.chapter + 1) % 1000, (x.verse + 1) % 1000); }
-#define TABLE_NAME kjv
+#define TABLE_NAME kjvset
 #define TABLE_KEY union kjvcite
 #define TABLE_UINT uint32_t
 #define TABLE_INVERSE
@@ -55,10 +55,10 @@ static void kjv_to_string(const union kjvcite x, char (*const a)[12])
 #include "../src/table.h"
 
 /* Derived information on verse word count. */
-static uint32_t verse_hash(const union kjvcite x) { return kjv_hash(x); }
-static union kjvcite verse_unhash(const uint32_t x) { return kjv_unhash(x); }
+static uint32_t verse_hash(const union kjvcite x) { return kjvset_hash(x); }
+static union kjvcite verse_unhash(const uint32_t x) { return kjvset_unhash(x); }
 static void verse_to_string(const union kjvcite x, const unsigned count,
-	char (*const a)[12]) { (void)count; kjv_to_string(x, a); }
+	char (*const a)[12]) { (void)count; kjvset_to_string(x, a); }
 #define TABLE_NAME verse
 #define TABLE_KEY union kjvcite
 #define TABLE_UINT uint32_t
@@ -159,6 +159,7 @@ scan:
 
 void kjv_(struct kjv *const kjv) {
 	if(!kjv) return;
+	kjvset_table_(&kjv->set);
 	verse_table_(&kjv->verses);
 }
 
@@ -206,7 +207,7 @@ struct kjv kjv(void) {
 			case TABLE_ERROR: goto catch;
 			case TABLE_ABSENT: break;
 			}
-			*words = x.words, kjv.words += x.words;
+			*words = x.words, kjv.total_words += x.words;
 		}
 		if(x.error) { fprintf(stderr, "[%u]%s on line %zu\n",
 			b + 1, kjv_book_string[b], x.line); goto catch; }
@@ -222,9 +223,18 @@ finally:
 	return kjv;
 }
 
-unsigned kjv_words(/*const*/ struct kjv *const kjv, const union kjvcite cite) {
-	return kjv && verse_table_get(&kjv->verses, cite);
+int kjv_add(struct kjv *const kjv, const union kjvcite cite) {
+	if(!kjv) return 0;
+	switch(kjvset_table_try(&kjv->set, cite)) {
+	case TABLE_ERROR: return 0;
+	case TABLE_ABSENT: kjv->set_words += verse_table_get(&kjv->verses, cite);
+	case TABLE_PRESENT: break;
+	}
+	return 1;
 }
 
-const char *kjv_entire_to_string(const struct kjv *const kjv)
+const char *kjv_to_string(const struct kjv *const kjv)
 	{ return kjv ? verse_table_to_string(&kjv->verses) : ""; }
+
+const char *kjv_set_to_string(const struct kjv *const kjv)
+	{ return kjv ? kjvset_table_to_string(&kjv->set) : 0; }

test/test_kjv.c

@@ -23,7 +23,9 @@ int main(void) {
 	/*c = (union kjvcite){ .book = Genesis, .chapter = 1, .verse = 1 };
 	printf("1:1:1 -> %u\n", verse_table_get(&kjv.verses, c));*/
 
-	fprintf(stderr, "%zu total words, %s\n", k.words, kjv_entire_to_string(&k));
+	fprintf(stderr, "%zu total words, %s.\n", k.total_words, kjv_to_string(&k));
+	kjv_add(&k, (union kjvcite){ .book = Genesis, .chapter = 1, .verse = 1 });
+	fprintf(stderr, "%zu of which: %s.\n", k.set_words, kjv_set_to_string(&k));
 	kjv_(&k);
 	return EXIT_SUCCESS;
 }