From 6e2c2fee8cacb353d58fb10e489f45131d223826 Mon Sep 17 00:00:00 2001
From: Andy Spencer <andy753421@gmail.com>
Date: Mon, 9 Jun 2008 04:38:11 +0000
Subject: [PATCH] init function, level-2 parseing template

---
 src/aweather.c |  6 ++--
 src/cube.c     |  7 ++++
 src/level2.c   | 90 ++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 100 insertions(+), 3 deletions(-)
 create mode 100644 src/level2.c

diff --git a/src/aweather.c b/src/aweather.c
index c96cf19..6680850 100644
--- a/src/aweather.c
+++ b/src/aweather.c
@@ -57,9 +57,9 @@ int main(int argc, char *argv[])
 	GdkGLConfig *glconfig = gdk_gl_config_new_by_mode(GDK_GL_MODE_RGB | GDK_GL_MODE_DEPTH | GDK_GL_MODE_DOUBLE);
 	if (!glconfig) g_assert_not_reached();
 	if (!gtk_widget_set_gl_capability(drawing, glconfig, NULL, TRUE, GDK_GL_RGBA_TYPE)) g_assert_not_reached();
-	g_signal_connect(drawing, "configure-event", G_CALLBACK(configure), NULL);
-	g_signal_connect(drawing, "expose-event",    G_CALLBACK(expose),    NULL);
-	g_timeout_add(1000/60, rotate, drawing);
+
+	/* Load plugins */
+	cube_init(drawing);
 
 	gtk_widget_show_all(window);
 	gtk_main();
diff --git a/src/cube.c b/src/cube.c
index 9465938..1a13e05 100644
--- a/src/cube.c
+++ b/src/cube.c
@@ -143,3 +143,10 @@ gboolean rotate (gpointer user_data)
 
 	return TRUE;
 }
+
+gboolean cube_init(GtkDrawingArea *drawing)
+{
+	g_signal_connect(drawing, "configure-event", G_CALLBACK(configure), NULL);
+	g_signal_connect(drawing, "expose-event",    G_CALLBACK(expose),    NULL);
+	g_timeout_add(1000/60, rotate, drawing);
+}
diff --git a/src/level2.c b/src/level2.c
new file mode 100644
index 0000000..9259a14
--- /dev/null
+++ b/src/level2.c
@@ -0,0 +1,90 @@
+/* Prototype stuff for parsing Level-II data */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <error.h>
+#include <arpa/inet.h>
+
+struct packet {
+	short          junk1[6];
+	unsigned short size;
+	unsigned char  id, type;
+	unsigned short seq, gen_date;
+	unsigned int   gen_time;
+	unsigned short num_seg, seg;
+	unsigned int   coll_time;
+	unsigned short coll_date, range, angle, radial, rad_status, elev_angle;
+	unsigned short elev_num;
+	short          first_refl, first_dopp;
+	unsigned short refl_size, dopp_size;
+	unsigned short num_refl_gate, num_dopp_gate, sector;
+	float          gain;
+	unsigned short refl_ptr, vel_ptr, spec_ptr, dopp_res, pattern;
+	short          junk2[4];
+	unsigned short refl_ptr_rda, vel_ptr_rda, spec_ptr_rda, nyquist, atten;
+	short          thresh;
+	short          junk3[17];
+	unsigned char  data[2304];
+	float          dbz[460];
+};
+
+typedef struct {
+	/* 24 bytes */
+	char version[4];
+	char unknown0[16];
+	char station[4];
+} __attribute__ ((packed)) header_t;
+
+int main(int argc, char **argv)
+{
+	if (argc < 2) {
+		printf("usage: %s <level2-data>\n", argv[0]);
+		return 0;
+	}
+
+	/* Read header */
+	FILE *fd = fopen(argv[1], "r");
+	if (fd == NULL)
+		error(1, errno, "Error opening files `%s'", argv[1]);
+	header_t header;
+	if (1 != fread(&header, sizeof(header_t), 1, fd))
+		error(1, errno, "Error reading header");
+
+	/* Cut up the bzips */
+	int file_num = 0;
+	char filename[16];
+	char *buf = NULL;
+	FILE *outfile = NULL;
+	unsigned int size = 0;
+
+	while ((int)size >= 0) {
+		if (1 != fread(&size, 4, 1, fd))
+			break; //error(1, errno, "Error reading size, pos=%x", (unsigned int)ftell(fd));
+		size = ntohl(size);
+
+		/* Read data */
+		;
+		if (NULL == (buf = (char *)realloc(buf, size)))
+			error(1, errno, "cannot allocate `%d' bytes for buffer", size);
+		if (size != fread(buf, 1, size, fd))
+			error(1, errno, "error reading from input file");
+
+		/* Decmopress data */
+		//char *block = (char *)malloc(8192), *oblock = (char *)malloc(262144);
+		//error = BZ2_bzBuffToBuffDecompress(oblock, &olength, block, length, 0, 0);
+
+		/* Write data */
+		snprintf(filename, 16, "%d.bz2", file_num);
+		outfile = fopen(filename, "w+");
+		fwrite(buf, 1, size, outfile);
+		fclose(outfile);
+
+		//fprintf(stderr, "wrote `%d' bytes to file `%s'\n", size, filename);
+
+		/* iterate */
+		file_num++;
+	}
+
+	return 0;
+}
-- 
2.43.2