fix type inference

* fix type inference

* make checks inclusive for negative values of integers

* move to newer version of ubuntu

* fix iterator macros

* fix iterator macros

.github/workflows/build.yml

@@ -20,7 +20,7 @@ jobs:
     strategy:
         matrix:
             os:
-                - ubuntu-20.04
+                - ubuntu-24.04
                 - macOS-latest
             dims: [1, 2, 3, 4]
     runs-on: ${{ matrix.os }}
@@ -61,7 +61,7 @@ jobs:
     strategy:
         matrix:
             os:
-                - ubuntu-20.04
+                - ubuntu-24.04
                 - macOS-latest
             dims: [1, 2, 3, 4]
     runs-on: ${{ matrix.os }}

code/ndarray.c

@@ -1482,7 +1482,7 @@ ndarray_obj_t *ndarray_from_mp_obj(mp_obj_t obj, uint8_t other_type) {
 
     if(mp_obj_is_int(obj)) {
         int32_t ivalue = mp_obj_get_int(obj);
-        if((ivalue < -32767) || (ivalue > 32767)) {
+        if((ivalue < -32768) || (ivalue > 65535)) {
             // the integer value clearly does not fit the ulab integer types, so move on to float
             ndarray = ndarray_new_linear_array(1, NDARRAY_FLOAT);
             mp_float_t *array = (mp_float_t *)ndarray->array;
@@ -1490,7 +1490,7 @@ ndarray_obj_t *ndarray_from_mp_obj(mp_obj_t obj, uint8_t other_type) {
         } else {
             uint8_t dtype;
             if(ivalue < 0) {
-                if(ivalue > -128) {
+                if(ivalue >= -128) {
                     dtype = NDARRAY_INT8;
                 } else {
                     dtype = NDARRAY_INT16;

code/ndarray.h

@@ -759,8 +759,8 @@ ndarray_obj_t *ndarray_from_mp_obj(mp_obj_t , uint8_t );
         } while(_k_ < (_source_)->shape[ULAB_MAX_DIMS - 2]);\
         (_source_array_) -= (_source_)->strides[ULAB_MAX_DIMS - 2] * (_source_)->shape[ULAB_MAX_DIMS - 2];\
         (_source_array_) += (_source_)->strides[ULAB_MAX_DIMS - 3];\
-    j++;\
-    } while(j < (_source_)->shape[ULAB_MAX_DIMS - 3]);
+        _j_++;\
+    } while(_j_ < (_source_)->shape[ULAB_MAX_DIMS - 3]);
 
 #endif /* ULAB_MAX_DIMS == 3 */
 

code/ulab.c

@@ -33,7 +33,7 @@
 #include "user/user.h"
 #include "utils/utils.h"
 
-#define ULAB_VERSION 6.7.6
+#define ULAB_VERSION 6.7.7
 #define xstr(s) str(s)
 #define str(s) #s
 

docs/ulab-change-log.md

@@ -1,3 +1,9 @@
+Fri, 06 Jun 2025
+
+version 6.7.7
+
+    fix ndarray type inference for micropython objects
+
 Thu, 29 May 2025
 
 version 6.7.6