git subrepo clone https://github.com/libretro/libretro-common.git deps/libretro-common

[pcsx_rearmed.git] / deps / libretro-common / include / clamping.h

diff --git a/deps/libretro-common/include/clamping.h b/deps/libretro-common/include/clamping.h
new file mode 100644 (file)
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+++ b/deps/libretro-common/include/clamping.h
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+/* Copyright  (C) 2010-2020 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (clamping.h).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef _LIBRETRO_SDK_CLAMPING_H
+#define _LIBRETRO_SDK_CLAMPING_H
+
+#include <stdint.h>
+#include <retro_inline.h>
+
+/**
+ * clamp_float:
+ * @val           : initial value
+ * @lower         : lower limit that value should be clamped against
+ * @upper         : upper limit that value should be clamped against
+ *
+ * Clamps a floating point value.
+ *
+ * Returns: a clamped value of initial float value @val.
+ */
+static INLINE float clamp_float(float val, float lower, float upper)
+{
+   if (val < lower)
+      return lower;
+   if (val > upper)
+      return upper;
+   return val;
+}
+
+/**
+ * clamp_8bit:
+ * @val           : initial value
+ *
+ * Clamps an unsigned 8-bit value.
+ *
+ * Returns: a clamped value of initial unsigned 8-bit value @val.
+ */
+static INLINE uint8_t clamp_8bit(int val)
+{
+   if (val > 255)
+      return 255;
+   if (val < 0)
+      return 0;
+   return (uint8_t)val;
+}
+
+#endif