Organize `libc` and `libm` files (#1499)

* memmove

* strcpy

* strcmp

* memset

* fmodf

* fix some missing includes

* Remove libc header dependencies on libultra

* fix

* review

4 files changed, 8 insertions, 5 deletions

diff --git a/src/code/cutscene_camera.c b/src/code/cutscene_camera.c
index d5f3ef4a3..53474bf88 100644
--- a/src/code/cutscene_camera.c
+++ b/src/code/cutscene_camera.c
@@ -1,4 +1,5 @@
 #include "global.h"
+#include "libc/string.h"
 
 static CutsceneCamera* sCurCsCamera;
 
@@ -44,8 +45,8 @@ s32 CutsceneCamera_Init(Camera* camera, CutsceneCamera* csCamera) {
 
     sCurCsCamera = csCamera;
 
-    __osMemset(&csCamera->eyeInterp, 0, sizeof(CutsceneCameraInterp));
-    __osMemset(&csCamera->atInterp, 0, sizeof(CutsceneCameraInterp));
+    memset(&csCamera->eyeInterp, 0, sizeof(CutsceneCameraInterp));
+    memset(&csCamera->atInterp, 0, sizeof(CutsceneCameraInterp));
 
     csCamera->eyeInterp.type = csCamera->atInterp.type = CS_CAM_INTERP_OFF;
 
diff --git a/src/code/z_camera.c b/src/code/z_camera.c
index 0bfcafed0..5b58e939a 100644
--- a/src/code/z_camera.c
+++ b/src/code/z_camera.c
@@ -6955,7 +6955,7 @@ void Camera_Init(Camera* camera, View* view, CollisionContext* colCtx, PlayState
     s16 curUID;
     s16 j;
 
-    __osMemset(camera, 0, sizeof(Camera));
+    memset(camera, 0, sizeof(Camera));
 
     camera->play = sCamPlayState = play;
     curUID = sCameraNextUID;
diff --git a/src/code/z_kankyo.c b/src/code/z_kankyo.c
index 98fdc84fb..506d7d358 100644
--- a/src/code/z_kankyo.c
+++ b/src/code/z_kankyo.c
@@ -65,6 +65,7 @@ Gfx* sSkyboxStarsDList;
 #include "objects/gameplay_keep/gameplay_keep.h"
 #include "objects/gameplay_field_keep/gameplay_field_keep.h"
 #include "overlays/kaleido_scope/ovl_kaleido_scope/z_kaleido_scope.h"
+#include "libc/string.h"
 
 // Data
 f32 sSandstormLerpScale = 0.0f;
@@ -1298,7 +1299,7 @@ void Environment_UpdateLights(PlayState* play, EnvironmentContext* envCtx, Light
     AdjLightSettings spA4[4];
 
     var_fs3 = 0.0f;
-    __osMemset(spA4, 0, sizeof(AdjLightSettings) * ARRAY_COUNT(spA4));
+    memset(spA4, 0, sizeof(AdjLightSettings) * ARRAY_COUNT(spA4));
     lightSettingsList = play->envCtx.lightSettingsList;
 
     if ((envCtx->lightSettingOverride != LIGHT_SETTING_OVERRIDE_NONE) &&
diff --git a/src/code/z_quake.c b/src/code/z_quake.c
index 19db37c63..9423983e1 100644
--- a/src/code/z_quake.c
+++ b/src/code/z_quake.c
@@ -1,5 +1,6 @@
 #include "prevent_bss_reordering.h"
 #include "global.h"
+#include "libc/string.h"
 #include "z64quake.h"
 #include "z64view.h"
 
@@ -174,7 +175,7 @@ QuakeRequest* Quake_RequestImpl(Camera* camera, u32 type) {
     s16 index = Quake_GetFreeIndex();
     QuakeRequest* req = &sQuakeRequests[index];
 
-    __osMemset(req, 0, sizeof(QuakeRequest));
+    memset(req, 0, sizeof(QuakeRequest));
 
     req->camera = camera;
     req->camId = camera->camId;