From e7073c34d2ca92663d98bbb1912ad5f6e615e87f Mon Sep 17 00:00:00 2001
From: sanine <sanine.not@pm.me>
Date: Sun, 8 Jan 2023 23:27:03 -0600
Subject: add kai_alloc

---
 CMakeLists.txt          | 16 ++++++++--------
 example/CMakeLists.txt  |  4 ++++
 example/example.c       |  7 +++++++
 src/geometry/geometry.c | 26 +++++++++++++++++++-------
 src/geometry/geometry.h |  2 +-
 src/util/util.c         | 11 +++++++++++
 src/util/util.h         |  3 +++
 7 files changed, 53 insertions(+), 16 deletions(-)
 create mode 100644 example/CMakeLists.txt
 create mode 100644 example/example.c

diff --git a/CMakeLists.txt b/CMakeLists.txt
index bf4279e..b22b369 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -24,14 +24,14 @@ if (KALMIA_BUILD_TESTS)
 	endif()
 endif()
 
-# if (KALMIA_BUILD_EXAMPLE)
-# 	add_executable(kalmia-example)
-# 	target_link_libraries(kalmia-example kalmia)
-# 	if (UNIX)
-# 		target_link_libraries(kalmia-example m)
-# 	endif()
-# 	add_subdirectory(${CMAKE_CURRENT_LIST_DIR}/example)
-# endif()
+if (KALMIA_BUILD_EXAMPLE)
+	add_executable(kalmia-example)
+	target_link_libraries(kalmia-example kalmia)
+	if (UNIX)
+		target_link_libraries(kalmia-example m)
+	endif()
+	add_subdirectory(${CMAKE_CURRENT_LIST_DIR}/example)
+endif()
 
 add_subdirectory(src)
 add_subdirectory(3rdparty/ezxml)
diff --git a/example/CMakeLists.txt b/example/CMakeLists.txt
new file mode 100644
index 0000000..7951b9f
--- /dev/null
+++ b/example/CMakeLists.txt
@@ -0,0 +1,4 @@
+project(kalmia)
+
+target_sources(kalmia-example PUBLIC example.c)
+file(COPY white-cube.dae DESTINATION ${CMAKE_BINARY_DIR})
diff --git a/example/example.c b/example/example.c
new file mode 100644
index 0000000..050afa3
--- /dev/null
+++ b/example/example.c
@@ -0,0 +1,7 @@
+#include <stdio.h>
+#include <kalmia.h>
+
+int main()
+{
+	return 0;
+}
diff --git a/src/geometry/geometry.c b/src/geometry/geometry.c
index 1d26a70..7046f1e 100644
--- a/src/geometry/geometry.c
+++ b/src/geometry/geometry.c
@@ -6,24 +6,36 @@
 #include "geometry.h"
 
 
-void kai_parse_float_array(struct ka_float_array_t *dest, ezxml_t src)
+int kai_parse_float_array(struct ka_float_array_t *dest, ezxml_t src)
 {
+	/* get count */
+	const char *count = ezxml_attr(src, "count");
+	if (count == NULL) {
+		fprintf(stderr, "[kalmia] ERROR: required \"count\" parameter not present for float_array\n");
+		return -1;
+	}
+	char *end;
+	dest->count = strtol(count, &end, 10);
+
 	/* get id, if present */
 	const char *id = ezxml_attr(src, "id");
 	if (id != NULL) {
 		size_t id_len = strlen(id) + 1;
-		dest->id = malloc(sizeof(char) * id_len);
+		dest->id = kai_alloc(sizeof(char) * id_len, "float_array id");
+		if (dest->id == NULL) {
+			return -1;
+		}
 		strncpy(dest->id, id, id_len);
 	}
 	else {
 		dest->id = NULL;
 	}
 
-	/* get count */
-	const char *count = ezxml_attr(src, "count");
-	dest->count = strtol(count, NULL, 10);
-
 	/* parse floats */
-	dest->data = malloc(sizeof(ka_real_t) * dest->count);
+	dest->data = kai_alloc(sizeof(ka_real_t) * dest->count, "float_array data");
+	if (dest->data == NULL) {
+		free(dest->id);
+		return -1;
+	}
 	kai_text_to_reals(dest->data, ezxml_txt(src), dest->count);
 }
diff --git a/src/geometry/geometry.h b/src/geometry/geometry.h
index 7da5c3d..6268e3b 100644
--- a/src/geometry/geometry.h
+++ b/src/geometry/geometry.h
@@ -4,6 +4,6 @@
 #include <kalmia.h>
 #include <ezxml.h>
 
-void kai_parse_float_array(struct ka_float_array_t *dest, ezxml_t src);
+int kai_parse_float_array(struct ka_float_array_t *dest, ezxml_t src);
 
 #endif
diff --git a/src/util/util.c b/src/util/util.c
index 00561b7..4f79870 100644
--- a/src/util/util.c
+++ b/src/util/util.c
@@ -62,3 +62,14 @@ size_t kai_text_to_longs(long *dest, const char *str, size_t count)
 
 	return result;
 }
+
+
+void *kai_alloc(size_t size, const char *purpose)
+{
+	void *buf = malloc(size);
+	if (buf == NULL) {
+		fprintf(stderr, "[kalmia] ERROR: failed to allocated %ul-byte buffer for %s\n", size, purpose);
+		return NULL;
+	}
+	return buf;
+}
diff --git a/src/util/util.h b/src/util/util.h
index 0b6bc15..d5fa636 100644
--- a/src/util/util.h
+++ b/src/util/util.h
@@ -34,4 +34,7 @@ size_t kai_text_to_reals(ka_real_t *dest, const char *str, size_t count);
 
 size_t kai_text_to_longs(long *dest, const char *str, size_t count);
 
+
+void *kai_alloc(size_t size, const char *purpose);
+
 #endif
-- 
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