1 files changed, 62 insertions, 0 deletions
diff --git a/analyzer/utils/memory.c b/analyzer/utils/memory.c
new file mode 100644
index 0000000..91c5f18
--- /dev/null
+++ b/analyzer/utils/memory.c
@@ -0,0 +1,62 @@
+#include "memory.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+void *safe_malloc(size_t size) {
+    for (size_t i = 0; i < MAX_ALLOC_ATTEMPTS; i++) {
+        void *p = malloc(size);
+        if (p)
+            return p;
+        if (i < MAX_ALLOC_ATTEMPTS - 1) {
+            fprintf(stderr, "Failed malloc. Retrying in 1s...\n");
+            sleep(1);
+        }
+    }
+
+    fprintf(stderr, "FATAL: Failed malloc %d times. Exiting...", MAX_ALLOC_ATTEMPTS);
+    exit(EXIT_FAILURE);
+}
+
+void *safe_realloc(void *ptr, size_t size) {
+    if (!ptr)
+        return safe_malloc(size);
+
+    for (size_t i = 0; i < MAX_ALLOC_ATTEMPTS; i++) {
+        void *p = realloc(ptr, size);
+        if (p)
+            return p;
+        if (i < MAX_ALLOC_ATTEMPTS - 1) {
+            fprintf(stderr, "Failed realloc. Retrying in 1s...\n");
+            sleep(1);
+        }
+    }
+
+    fprintf(stderr, "FATAL: Failed realloc %d times. Exiting...", MAX_ALLOC_ATTEMPTS);
+    exit(EXIT_FAILURE);
+}
+
+// expand an array
+// returns pointer to the expanded array
+void *array_expand(void *arr, size_t el_size, size_t *cap, size_t to_fit) {
+    while (*cap < to_fit)
+        *cap *= 2;
+    return safe_realloc(arr, *cap * el_size);
+}
+
+void *array_append(void *arr, size_t el_size, size_t *len, size_t *cap, void *val) {
+    if (*len >= *cap)
+        arr = array_expand(arr, el_size, cap, *len + 1);
+    memcpy((char *)arr + (*len)++ * el_size, val, el_size);
+    return arr;
+}
+
+void *array_concat(void *arr1, size_t el_size, size_t *len1, size_t *cap, void *arr2, size_t len2) {
+    if (*len1 + len2 > *cap)
+        arr1 = array_expand(arr1, el_size, cap, *len1 + len2);
+    memcpy((char *)arr1 + *len1 * el_size, arr2, len2 * el_size);
+    *len1 += len2;
+    return arr1;
+}