Initial check in dumb 0.9.2 - has a few usages of floating point that should

be rewritten to fixed point. seems to compile cleanly for iriver.


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@6197 a1c6a512-1295-4272-9138-f99709370657

apps/codecs/dumb/src/core/readduh.c

@@ -0,0 +1,107 @@
+/*  _______         ____    __         ___    ___
+ * \    _  \       \    /  \  /       \   \  /   /       '   '  '
+ *  |  | \  \       |  |    ||         |   \/   |         .      .
+ *  |  |  |  |      |  |    ||         ||\  /|  |
+ *  |  |  |  |      |  |    ||         || \/ |  |         '  '  '
+ *  |  |  |  |      |  |    ||         ||    |  |         .      .
+ *  |  |_/  /        \  \__//          ||    |  |
+ * /_______/ynamic    \____/niversal  /__\  /____\usic   /|  .  . ibliotheque
+ *                                                      /  \
+ *                                                     / .  \
+ * readduh.c - Code to read a DUH from an open        / / \  \
+ *             file.                                 | <  /   \_
+ *                                                   |  \/ /\   /
+ * By entheh.                                         \_  /  > /
+ *                                                      | \ / /
+ *                                                      |  ' /
+ *                                                       \__/
+ */
+
+#include <stdlib.h>
+
+#include "dumb.h"
+#include "internal/dumb.h"
+
+
+
+static DUH_SIGNAL *read_signal(DUH *duh, DUMBFILE *f)
+{
+	DUH_SIGNAL *signal;
+	long type;
+
+	signal = malloc(sizeof(*signal));
+
+	if (!signal)
+		return NULL;
+
+	type = dumbfile_mgetl(f);
+	if (dumbfile_error(f)) {
+		free(signal);
+		return NULL;
+	}
+
+	signal->desc = _dumb_get_sigtype_desc(type);
+	if (!signal->desc) {
+		free(signal);
+		return NULL;
+	}
+
+	if (signal->desc->load_sigdata) {
+		signal->sigdata = (*signal->desc->load_sigdata)(duh, f);
+		if (!signal->sigdata) {
+			free(signal);
+			return NULL;
+		}
+	} else
+		signal->sigdata = NULL;
+
+	return signal;
+}
+
+
+
+/* read_duh(): reads a DUH from an already open DUMBFILE, and returns its
+ * pointer, or null on error. The file is not closed.
+ */
+DUH *read_duh(DUMBFILE *f)
+{
+	DUH *duh;
+	int i;
+
+	if (dumbfile_mgetl(f) != DUH_SIGNATURE)
+		return NULL;
+
+	duh = malloc(sizeof(*duh));
+	if (!duh)
+		return NULL;
+
+	duh->length = dumbfile_igetl(f);
+	if (dumbfile_error(f) || duh->length <= 0) {
+		free(duh);
+		return NULL;
+	}
+
+	duh->n_signals = dumbfile_igetl(f);
+	if (dumbfile_error(f) || duh->n_signals <= 0) {
+		free(duh);
+		return NULL;
+	}
+
+	duh->signal = malloc(sizeof(*duh->signal) * duh->n_signals);
+	if (!duh->signal) {
+		free(duh);
+		return NULL;
+	}
+
+	for (i = 0; i < duh->n_signals; i++)
+		duh->signal[i] = NULL;
+
+	for (i = 0; i < duh->n_signals; i++) {
+		if (!(duh->signal[i] = read_signal(duh, f))) {
+			unload_duh(duh);
+			return NULL;
+		}
+	}
+
+	return duh;
+}