first commit

include/mupdf/fitz/hash.h

@@ -0,0 +1,32 @@
+#ifndef MUPDF_FITZ_HASH_H
+#define MUPDF_FITZ_HASH_H
+
+#include "mupdf/fitz/system.h"
+#include "mupdf/fitz/context.h"
+#include "mupdf/fitz/output.h"
+
+/*
+ * Generic hash-table with fixed-length keys.
+ *
+ * The keys and values are NOT reference counted by the hash table.
+ * Callers are responsible for taking care the reference counts are correct.
+ * Inserting a duplicate entry will NOT overwrite the old value, and will
+ * return the old value.
+ *
+ * The drop_val callback function is only used to release values when the hash table
+ * is destroyed.
+ */
+
+typedef struct fz_hash_table_s fz_hash_table;
+typedef void (fz_hash_table_drop_fn)(fz_context *ctx, void *val);
+typedef void (fz_hash_table_for_each_fn)(fz_context *ctx, void *state, void *key, int keylen, void *val);
+
+fz_hash_table *fz_new_hash_table(fz_context *ctx, int initialsize, int keylen, int lock, fz_hash_table_drop_fn *drop_val);
+void fz_drop_hash_table(fz_context *ctx, fz_hash_table *table);
+
+void *fz_hash_find(fz_context *ctx, fz_hash_table *table, const void *key);
+void *fz_hash_insert(fz_context *ctx, fz_hash_table *table, const void *key, void *val);
+void fz_hash_remove(fz_context *ctx, fz_hash_table *table, const void *key);
+void fz_hash_for_each(fz_context *ctx, fz_hash_table *table, void *state, fz_hash_table_for_each_fn *callback);
+
+#endif