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-rw-r--r--libparsepcf_parse_int32_from_unsigned__.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/libparsepcf_parse_int32_from_unsigned__.c b/libparsepcf_parse_int32_from_unsigned__.c
new file mode 100644
index 0000000..37de799
--- /dev/null
+++ b/libparsepcf_parse_int32_from_unsigned__.c
@@ -0,0 +1,13 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+
+int32_t
+libparsepcf_parse_int32_from_unsigned__(uint32_t u)
+{
+ if (u & UINT32_C(0x80000000)) {
+ return (int32_t)(uint32_t)~u - 1;
+ } else {
+ return (int32_t)u;
+ }
+}