Add consistency checks to PrrtCodingConfiguration_create

prrt/proto/types/codingParams.c

@@ -6,11 +6,32 @@
 
 PrrtCodingConfiguration *PrrtCodingConfiguration_create(uint8_t k, uint8_t n, uint8_t c, uint8_t *n_cycle)
 {
+    if (n < k) {
+        PERROR("Invalid parameters: n must be greater or equal k.%s","");
+        return NULL;
+    }
+
+    uint8_t r = n - k;
+
+    if ((r > 0) && (n_cycle == NULL)) {
+        PERROR("Invalid parameters: n_cycle cannot be NULL if (n-k) != 0.%s","");
+        return NULL;
+    }
+
+    uint8_t sum = 0;
+    for (int i = 0; i < c; ++i) {
+        sum += n_cycle[i];
+    }
+    if (sum != r) {
+        PERROR("Invalid parameters: The elements in n_cycle must sum up to n-k.%s","");
+        return NULL;
+    }
+
     PrrtCodingConfiguration *cc = calloc(1, sizeof(PrrtCodingConfiguration));
     check_mem(cc);
     cc->k = k;
     cc->n = n;
-    cc->r = cc->n - cc->k;
+    cc->r = r;
     cc->c = c;
     if(n_cycle != NULL) {
         cc->n_cycle = (uint8_t*) realloc(cc->n_cycle, cc->c * sizeof(int8_t));