From cf97f10ed85f42807fba4f34918b1d50e5de49eb Mon Sep 17 00:00:00 2001
From: Nicklas Larsson <n_larsson@yahoo.com>
Date: Sat, 18 Mar 2023 21:20:39 +0100
Subject: [PATCH] fix  -Wgnu-pointer-arith compiler warnings (#2875)

---
 lib/raster3d/mask.c        |  8 ++++----
 raster/r.fill.stats/main.c | 12 ++++++------
 raster/r.in.xyz/main.c     |  2 +-
 3 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/lib/raster3d/mask.c b/lib/raster3d/mask.c
index 74efe15e218..69e7a498774 100644
--- a/lib/raster3d/mask.c
+++ b/lib/raster3d/mask.c
@@ -34,7 +34,7 @@ static float RASTER3D_MASKNUMmaskValue;
 
 /*--------------------------------------------------------------------------*/
 
-int Rast3d_mask_close()
+int Rast3d_mask_close(void)
 {
     /* No Idea if this is correct return value */
     if (!Rast3d_maskMapExistsVar)
@@ -304,12 +304,12 @@ void Rast3d_mask_tile(RASTER3D_Map *map, int tileIndex, void *tile, int type)
         for (dy = y; dy < rows; dy++) {
             for (dx = x; dx < cols; dx++) {
                 RASTER3D_MASKNUM(map, dx, dy, dz, tile, type);
-                tile += length;
+                tile = (char *)tile + length;
             }
 
-            tile += xLength;
+            tile = (char *)tile + xLength;
         }
-        tile += yLength;
+        tile = (char *)tile + yLength;
     }
 }
 
diff --git a/raster/r.fill.stats/main.c b/raster/r.fill.stats/main.c
index 3e76a6720c1..5a99dd19092 100644
--- a/raster/r.fill.stats/main.c
+++ b/raster/r.fill.stats/main.c
@@ -193,14 +193,14 @@ void print_weights_matrix(long int rows, long int cols)
 void *get_input_row(unsigned long row_idx)
 {
     unsigned long i;
-    void *my_cell = NULL;
+    char *my_cell = NULL;
 
     my_cell = CELL_INPUT_HANDLES[row_idx];
 
     for (i = 0; i < PADDING_WIDTH; i++)
         my_cell += CELL_IN_SIZE;
 
-    return (my_cell);
+    return (void *)my_cell;
 }
 
 /* NEIGHBORHOOD STATISTICS
@@ -331,7 +331,7 @@ void read_neighborhood(unsigned long row_index, unsigned long col, double min,
                        double max, int preserve, stats_struct *stats)
 {
     unsigned long i, j;
-    void *cell;
+    char *cell;
     double cell_value;
 
     stats->overwrite = 0;
@@ -511,7 +511,7 @@ void init_handles(void)
 void advance_one_row(int file_desc, long current_row)
 {
     unsigned long i, j;
-    void *cell_input;
+    char *cell_input;
     static unsigned long replace_row =
         0; /* points to the row which will be replaced next */
     unsigned long replace_pos = 0;
@@ -556,7 +556,7 @@ void interpolate_row(unsigned long row_index, unsigned long cols, double min,
                      stats_struct *stats, int write_err)
 {
     unsigned long j;
-    void *cell_output;
+    char *cell_output;
     FCELL *err_output;
 
     cell_output = CELL_OUTPUT;
@@ -744,7 +744,7 @@ int main(int argc, char *argv[])
     int write_error;
 
     /* file handlers */
-    void *cell_input;
+    char *cell_input;
     int in_fd;
     int out_fd;
     int err_fd;
diff --git a/raster/r.in.xyz/main.c b/raster/r.in.xyz/main.c
index 08264657a0f..0257f22a97d 100644
--- a/raster/r.in.xyz/main.c
+++ b/raster/r.in.xyz/main.c
@@ -109,7 +109,7 @@ int main(int argc, char *argv[])
     RASTER_MAP_TYPE rtype;
     struct History history;
     char title[64];
-    void *n_array, *min_array, *max_array, *sum_array, *sumsq_array,
+    char *n_array, *min_array, *max_array, *sum_array, *sumsq_array,
         *index_array;
     void *raster_row, *ptr;
     struct Cell_head region;