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cylib/cmake/helpers/libusb_version.c

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+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <libusb.h>
+
+#if WIN32
+#include <winbase.h>
+typedef const struct libusb_version * (__stdcall * version_fn)(void);
+#endif
+
+int main(int argc, char *argv[])
+{
+    int status = 0;
+    const struct libusb_version *ver;
+
+#if WIN32
+    if (argc > 1) {
+        HINSTANCE dll;
+        version_fn get_version;
+
+        dll = LoadLibraryA(argv[1]);
+        if (!dll) {
+            fprintf(stderr, "Failed to load %s\n", argv[1]);
+            return -1;
+        }
+
+        get_version = (version_fn) GetProcAddress(dll, "libusb_get_version");
+        if (get_version) {
+            ver = get_version();
+            printf("%u.%u.%u\n", ver->major, ver->minor, ver->micro);
+        } else{
+            fprintf(stderr, "Failed to get address of libusb_get_version()\n");
+            status = -1;
+        }
+        FreeLibrary(dll);
+    } else {
+        fprintf(stderr, "Windows usage: %s <libusb.dll>\n", argv[0]);
+        return -1;
+    }
+#else
+    ver = libusb_get_version();
+    printf("%u.%u.%u\n", ver->major, ver->minor, ver->micro);
+#endif
+
+    return status;
+}