Const correctness and cppcheck warnings

src/grib_accessor_class_bufr_data_array.cc

@@ -1524,9 +1524,9 @@ static int build_bitmap(grib_accessor_bufr_data_array* self, unsigned char* data
     int i, localReference, width, bitmapEndElementsDescriptorsIndex;
     long ppos, n;
     grib_accessor* a = (grib_accessor*)self;
-    grib_context* c               = a->context;
+    const grib_context* c = a->context;
     bufr_descriptor** descriptors = self->expanded->v;
-    long* edi                     = elementsDescriptorsIndex->v;
+    const long* edi = elementsDescriptorsIndex->v;
     /* int iel=grib_iarray_used_size(elementsDescriptorsIndex)-1; */
     int err = 0;
 
@@ -1653,9 +1653,9 @@ static int build_bitmap_new_data(grib_accessor_bufr_data_array* self, unsigned c
     int i, bitmapEndElementsDescriptorsIndex;
     long n;
     grib_accessor* a = (grib_accessor*)self;
-    grib_context* c               = a->context;
+    const grib_context* c = a->context;
     bufr_descriptor** descriptors = self->expanded->v;
-    long* edi                     = elementsDescriptorsIndex->v;
+    const long* edi = elementsDescriptorsIndex->v;
 
     switch (descriptors[iBitmapOperator]->code) {
         case 222000:

src/grib_accessor_class_bufr_extract_subsets.cc

@@ -108,7 +108,7 @@ grib_accessor_class* grib_accessor_class_bufr_extract_subsets = &_grib_accessor_
 static void get_accessors(grib_accessor* a)
 {
     grib_accessor_bufr_extract_subsets* self = (grib_accessor_bufr_extract_subsets*)a;
-    grib_handle* h                           = grib_handle_of_accessor(a);
+    const grib_handle* h = grib_handle_of_accessor(a);
 
     if (self->packAccessor)
         return;
@@ -134,7 +134,6 @@ static int get_native_type(grib_accessor* a)
 
 static int pack_long(grib_accessor* a, const long* val, size_t* len)
 {
-    int err                                  = 0;
     grib_accessor_bufr_extract_subsets* self = (grib_accessor_bufr_extract_subsets*)a;
     size_t l = 1;
     long v[1];
@@ -142,7 +141,7 @@ static int pack_long(grib_accessor* a, const long* val, size_t* len)
     get_accessors(a);
 
     v[0] = 1;
-    err  = grib_pack_long(self->packAccessor, v, &l);
+    int err  = grib_pack_long(self->packAccessor, v, &l);
     if (err) {
         if (err == GRIB_ENCODING_ERROR)
             grib_context_log(a->context, GRIB_LOG_ERROR, "Could not extract subset(s).\n\tHint: Did you forget to set unpack=1?");

src/grib_accessor_class_bufr_simple_thinning.cc

@@ -133,18 +133,17 @@ static int get_native_type(grib_accessor* a)
 
 static int apply_thinning(grib_accessor* a)
 {
-    grib_accessor_bufr_simple_thinning* self = (grib_accessor_bufr_simple_thinning*)a;
+    const grib_accessor_bufr_simple_thinning* self = (grib_accessor_bufr_simple_thinning*)a;
-    int ret                                  = 0;
+
     long skip;
     grib_handle* h  = grib_handle_of_accessor(a);
     grib_context* c = h->context;
     long compressed = 0, nsubsets;
-    long i;
     grib_iarray* subsets;
     long* subsets_ar = 0;
     long start = 0, radius = 0;
 
-    ret = grib_get_long(h, "compressedData", &compressed);
+    int ret = grib_get_long(h, "compressedData", &compressed);
     if (ret)
         return ret;
     if (compressed) {
@@ -168,7 +167,7 @@ static int apply_thinning(grib_accessor* a)
             return ret;
 
         subsets = grib_iarray_new(c, numberOfSubsets / skip + 1, 10);
-        for (i = 0; i < numberOfSubsets; i += skip + 1) {
+        for (long i = 0; i < numberOfSubsets; i += skip + 1) {
             grib_iarray_push(subsets, i + 1);
         }
 
@@ -200,12 +199,11 @@ static int apply_thinning(grib_accessor* a)
 
 static int pack_long(grib_accessor* a, const long* val, size_t* len)
 {
-    int err                                  = 0;
+    const grib_accessor_bufr_simple_thinning* self = (grib_accessor_bufr_simple_thinning*)a;
-    grib_accessor_bufr_simple_thinning* self = (grib_accessor_bufr_simple_thinning*)a;
 
     if (*len == 0)
         return GRIB_SUCCESS;
-    err = apply_thinning(a);
+    int err = apply_thinning(a);
     if (err)
         return err;
 

src/grib_accessor_class_change_alternative_row_scanning.cc

@@ -125,7 +125,7 @@ static int pack_long(grib_accessor* a, const long* val, size_t* len)
 {
     int err = 0;
     grib_accessor_change_alternative_row_scanning* self = (grib_accessor_change_alternative_row_scanning*)a;
-    grib_context* c = a->context;
+    const grib_context* c = a->context;
     grib_handle* h  = grib_handle_of_accessor(a);
     long i, j, jr, theEnd, Ni, Nj, k, kp, alternativeRowScanning;
     size_t size = 0;

src/grib_accessor_class_change_scanning_direction.cc

@@ -146,7 +146,7 @@ static int pack_long(grib_accessor* a, const long* val, size_t* len)
     size_t size                                   = 0;
     double* values                                = NULL;
     grib_accessor_change_scanning_direction* self = (grib_accessor_change_scanning_direction*)a;
-    grib_context* c                               = a->context;
+    const grib_context* c                         = a->context;
     grib_handle* h                                = grib_handle_of_accessor(a);
     const char* cclass_name                       = a->cclass->name;
 

src/grib_accessor_class_closest_date.cc

@@ -159,6 +159,8 @@ static int unpack_long(grib_accessor* a, long* val, size_t* len)
 /* Sets val to the 'index' of the closes date */
 static int unpack_double(grib_accessor* a, double* val, size_t* len)
 {
+    const grib_accessor_closest_date* self = (grib_accessor_closest_date*)a;
+
     int err = 0;
     long num_forecasts = 0; /* numberOfForecastsUsedInLocalTime */
     /* These relate to the date and time in Section 1 */
@@ -171,9 +173,8 @@ static int unpack_double(grib_accessor* a, double* val, size_t* len)
     /* These relate to the forecast dates and times in Section 4 */
     long *yearArray, *monthArray, *dayArray, *hourArray, *minuteArray, *secondArray;
 
-    grib_accessor_closest_date* self = (grib_accessor_closest_date*)a;
     grib_handle* h = grib_handle_of_accessor(a);
-    grib_context* c = a->context;
+    const grib_context* c = a->context;
     *val = -1; /* initialise to an invalid index */
 
     if ((err = grib_get_long_internal(h, self->numForecasts, &num_forecasts)) != GRIB_SUCCESS) return err;

src/grib_accessor_class_codeflag.cc

@@ -123,7 +123,7 @@ static int test_bit(long a, long b)
 
 static int grib_get_codeflag(grib_accessor* a, long code, char* codename)
 {
-    grib_accessor_codeflag* self = (grib_accessor_codeflag*)a;
+    const grib_accessor_codeflag* self = (grib_accessor_codeflag*)a;
     FILE* f = NULL;
     char fname[1024];
     char bval[50];
@@ -200,10 +200,10 @@ static int value_count(grib_accessor* a, long* count)
 
 static void dump(grib_accessor* a, grib_dumper* dumper)
 {
-    grib_accessor_codeflag* self = (grib_accessor_codeflag*)a;
+    const grib_accessor_codeflag* self = (grib_accessor_codeflag*)a;
-    long v;
+    long v = 0;
-    char flagname[1024];
+    char flagname[1024] = {0,};
-    char fname[1024];
+    char fname[1024] = {0,};
 
     size_t llen = 1;
 

src/grib_accessor_class_data_ccsds_packing.cc

@@ -650,7 +650,7 @@ static int unpack_float(grib_accessor* a, float* val, size_t* len)
 static int unpack_double_element(grib_accessor* a, size_t idx, double* val)
 {
     // The index idx relates to codedValues NOT values!
-    grib_accessor_data_ccsds_packing* self = (grib_accessor_data_ccsds_packing*)a;
+    const grib_accessor_data_ccsds_packing* self = (grib_accessor_data_ccsds_packing*)a;
     grib_handle* hand = grib_handle_of_accessor(a);
     int err = 0;
     size_t size    = 0;
@@ -686,7 +686,7 @@ static int unpack_double_element(grib_accessor* a, size_t idx, double* val)
 
 static int unpack_double_element_set(grib_accessor* a, const size_t* index_array, size_t len, double* val_array)
 {
-    grib_accessor_data_ccsds_packing* self = (grib_accessor_data_ccsds_packing*)a;
+    const grib_accessor_data_ccsds_packing* self = (grib_accessor_data_ccsds_packing*)a;
     grib_handle* hand = grib_handle_of_accessor(a);
     size_t size = 0, i = 0;
     double* values = NULL;

src/grib_accessor_class_expanded_descriptors.cc

@@ -713,7 +713,7 @@ int grib_accessor_class_expanded_descriptors_set_do_expand(grib_accessor* a, lon
 
 bufr_descriptors_array* grib_accessor_class_expanded_descriptors_get_expanded(grib_accessor* a, int* err)
 {
-    grib_accessor_expanded_descriptors* self = (grib_accessor_expanded_descriptors*)a;
+    const grib_accessor_expanded_descriptors* self = (grib_accessor_expanded_descriptors*)a;
     *err = expand(a);
     return self->expanded;
 }
@@ -722,7 +722,7 @@ static int unpack_double(grib_accessor* a, double* val, size_t* len)
 {
     grib_accessor_expanded_descriptors* self = (grib_accessor_expanded_descriptors*)a;
     int ret = 0;
-    int i;
+    size_t i = 0;
     size_t expandedSize;
 
     if (self->rank != 2) {
@@ -758,7 +758,7 @@ static int unpack_long(grib_accessor* a, long* val, size_t* len)
     grib_accessor_expanded_descriptors* self = (grib_accessor_expanded_descriptors*)a;
     int ret     = 0;
     size_t rlen = 0;
-    size_t i;
+    size_t i    = 0;
 
     ret = expand(a);
     if (ret)