From c85943d37456ef89f914bb1043f734deb8904dad Mon Sep 17 00:00:00 2001
From: Nick Bowler <nbowler@draconx.ca>
Date: Sat, 11 Jul 2009 00:43:47 -0400
Subject: [PATCH] upkg: Print package export info.

---
 src/libupkg.c | 99 +++++++++++++++++++++++++++++++++++++++++++++++++++
 src/upkg.c    | 23 +++++++++++-
 src/upkg.h    |  5 +++
 3 files changed, 126 insertions(+), 1 deletion(-)

diff --git a/src/libupkg.c b/src/libupkg.c
index 8e5de38..d5203b4 100644
--- a/src/libupkg.c
+++ b/src/libupkg.c
@@ -422,6 +422,105 @@ const char *upkg_get_name(struct upkg *pkg, unsigned long idx)
 	return pkg->priv->names[idx].name;
 }
 
+long upkg_export_find(struct upkg *pkg, const char *name)
+{
+	/* This is wrong.
+	 * Export names are not necessarily unique within a package. */
+	for (unsigned i = 0; i < pkg->export_count; i++) {
+		struct upkg_export *export = &pkg->priv->exports[i];
+		if (strcmp(export->name, name) == 0) {
+			return i;
+		}
+	}
+
+	return -1;
+}
+
+const char *upkg_export_name(struct upkg *pkg, unsigned long idx)
+{
+	if (idx < pkg->export_count)
+		return pkg->priv->exports[idx].name;
+	return NULL;
+}
+
+const char *upkg_export_class(struct upkg *pkg, unsigned long idx,
+                              const char **package, const char **group)
+{
+	struct upkg_export *export;
+	struct upkg_import *iclass, *ipackage;
+	unsigned long pkg_idx;
+
+	if (idx >= pkg->export_count)
+		return NULL;
+	
+	export = &pkg->priv->exports[idx];
+
+	/* ASSUMPTION: class references are always imports */
+	if (export->class > 0) {
+		fprintf(stderr, "Assumption Violated: class not import\n");
+		return NULL;
+	}
+
+	/* ASSUMPTION: group references are always exports */
+	if (export->package < 0) {
+		fprintf(stderr, "Assumption Violated: group not export\n");
+		return NULL;
+	}
+
+	/* Get the group name. */
+	if (export->package > 0) {
+		pkg_idx = export->package - 1;
+
+		if (pkg_idx >= pkg->export_count) {
+			return NULL;
+		}
+
+		/* Lots more to handle.  Function arguments are stupid. */
+
+		if (group) *group = pkg->priv->exports[pkg_idx].name;
+	} else {
+		if (group) *group = NULL;
+	}
+
+	/* Get the class. */
+	if (export->class == 0) {
+		if (package) *package = "Core";
+		return "Class";
+	}
+
+	pkg_idx = -(export->class + 1);
+	if (pkg_idx >= pkg->import_count)
+		return NULL;
+	iclass = &pkg->priv->imports[pkg_idx];
+
+	/* ASSUMPTION: Class references are always Core.Class */
+	if (strcmp(iclass->class_name, "Class") || strcmp(iclass->class_package, "Core")) {
+		fprintf(stderr, "Assumption Violated: class not Core.Class\n");
+		return NULL;
+	}
+
+	/* ASSUMPTION: Package references are always imports */
+	if (iclass->package >= 0) {
+		fprintf(stderr, "Assumption Violated: package not import\n");
+		return NULL;
+	}
+
+	/* Get the package. */
+	pkg_idx = -(iclass->package + 1);
+	if (pkg_idx >= pkg->import_count)
+		return NULL;
+	ipackage = &pkg->priv->imports[pkg_idx];
+
+	/* ASSUMPTION: Package references are always Core.Package */
+	if (strcmp(ipackage->class_name, "Package") || strcmp(ipackage->class_package, "Core")) {
+		fprintf(stderr, "Assumption Violated: package not Core.Package\n");
+		return NULL;
+	}
+
+	if (package) *package = ipackage->object_name;
+	return iclass->object_name;
+}
+
 struct upkg_file *upkg_export_open(struct upkg *pkg, unsigned long idx)
 {
 	struct upkg_file *f;
diff --git a/src/upkg.c b/src/upkg.c
index 6da174c..12dc09e 100644
--- a/src/upkg.c
+++ b/src/upkg.c
@@ -107,6 +107,23 @@ void print_guid(unsigned char guid[static 16])
 	}
 }
 
+void print_upkg_exports(struct upkg *pkg)
+{
+	for (unsigned i = 0; i < pkg->export_count; i++) {
+		const char *name, *package, *group, *class;
+
+		name  = upkg_export_name(pkg, i);
+		class = upkg_export_class(pkg, i, &package, &group);
+
+		if (!name || !class)
+			continue;
+
+		printf("%u - %s%s%s (%s.%s)\n", i+1,
+			group ? group : "", group ? "." : "", name,
+			package, class);
+	}
+}
+
 int package_info(struct upkg *pkg)
 {
 	printf("Version: %u\n",  pkg->version);
@@ -128,13 +145,17 @@ int package_info(struct upkg *pkg)
 		}
 	}
 
+	printf("Exports: %lu\n", pkg->export_count);
+	if (verbose >= 1) print_upkg_exports(pkg);
+	printf("Imports: %lu\n", pkg->import_count);
+
 	return EXIT_SUCCESS;
 }
 
 int main(int argc, char **argv)
 {
 	struct upkg *pkg;
-	unsigned mode;
+	unsigned mode = MODE_INFO;
 	int opt, rc = EXIT_FAILURE;
 
 	if (argc > 0) progname = argv[0];
diff --git a/src/upkg.h b/src/upkg.h
index 7ef55d7..08ee13a 100644
--- a/src/upkg.h
+++ b/src/upkg.h
@@ -66,6 +66,11 @@ int upkg_close(struct upkg *pkg);
 
 const char *upkg_get_name(struct upkg *pkg, unsigned long idx);
 
+long   upkg_export_find(struct upkg *pkg, const char *name);
+const char *upkg_export_name(struct upkg *pkg, unsigned long idx);
+const char *upkg_export_class(struct upkg *pkg, unsigned long idx,
+                              const char **package, const char **group);
+
 struct upkg_file *upkg_export_open(struct upkg *pkg, unsigned long idx);
 size_t upkg_export_read(struct upkg_file *f, void *buf, size_t n);
 int    upkg_export_seek(struct upkg_file *f, long offset, int whence);
-- 
2.43.2