# HG changeset patch
# User Mike Becker <universe@uap-core.de>
# Date 1614633546 -3600
# Node ID 81a4c3a63e655cc60ddf4c6e4d07fcbb9ca45a44
# Parent  0f4aa9fc75d961a4de33f6c844235c967fed03d8
adds cxReallocate()

diff -r 0f4aa9fc75d9 -r 81a4c3a63e65 src/allocator.c
--- a/src/allocator.c	Sun Feb 14 15:37:12 2021 +0100
+++ b/src/allocator.c	Mon Mar 01 22:19:06 2021 +0100
@@ -29,6 +29,7 @@
 #include "cx/allocator.h"
 
 #include <stdlib.h>
+#include <errno.h>
 
 void *cx_malloc_stdlib(void *unused, size_t n) {
     return malloc(n);
@@ -67,6 +68,20 @@
     return allocator->cl->realloc(allocator->data, mem, n);
 }
 
+int cxReallocate(CxAllocator allocator, void **mem, size_t n) {
+    if (mem == NULL) {
+        errno = EINVAL;
+        return 1;
+    }
+    void* nmem = allocator->cl->realloc(allocator->data, *mem, n);
+    if (nmem == NULL) {
+        return 1;
+    } else {
+        *mem = nmem;
+        return 0;
+    }
+}
+
 void *cxCalloc(CxAllocator allocator, size_t nelem, size_t n) {
     return allocator->cl->calloc(allocator->data, nelem, n);
 }
diff -r 0f4aa9fc75d9 -r 81a4c3a63e65 src/cx/allocator.h
--- a/src/cx/allocator.h	Sun Feb 14 15:37:12 2021 +0100
+++ b/src/cx/allocator.h	Mon Mar 01 22:19:06 2021 +0100
@@ -52,6 +52,8 @@
 
 void *cxRealloc(CxAllocator allocator, void *mem, size_t n);
 
+int cxReallocate(CxAllocator allocator, void **mem, size_t n);
+
 void *cxCalloc(CxAllocator allocator, size_t nelem, size_t n);
 
 void cxFree(CxAllocator allocator, void *mem);
diff -r 0f4aa9fc75d9 -r 81a4c3a63e65 test/test_allocator.c
--- a/test/test_allocator.c	Sun Feb 14 15:37:12 2021 +0100
+++ b/test/test_allocator.c	Mon Mar 01 22:19:06 2021 +0100
@@ -49,6 +49,21 @@
     free(test);
 }
 
+void test_default_reallocate(void) {
+    void *test = calloc(8, 1);
+    memcpy(test, "Test", 4);
+    int rval = cxReallocate(cxDefaultAllocator, &test, 16);
+    CU_ASSERT_EQUAL(rval, 0);
+    CU_ASSERT_PTR_NOT_NULL(test)
+    CU_ASSERT_STRING_EQUAL("Test", test)
+    free(test);
+}
+
+void test_reallocate_null(void) {
+    int rval = cxReallocate(cxDefaultAllocator, NULL, 16);
+    CU_ASSERT_EQUAL(rval, EINVAL);
+}
+
 void test_default_calloc(void) {
     void *test = cxCalloc(cxDefaultAllocator, 8, 2);
     CU_ASSERT_PTR_NOT_NULL(test)
@@ -78,7 +93,9 @@
             !CU_add_test(suite, "default allocator available", test_default_allocator_available) ||
             !CU_add_test(suite, "test of malloc()", test_default_malloc)||
             !CU_add_test(suite, "test of realloc()", test_default_realloc) ||
-            !CU_add_test(suite, "test of realloc()", test_default_calloc) ||
+            !CU_add_test(suite, "test of realloc() via cxReallocate", test_default_reallocate) ||
+            !CU_add_test(suite, "test of cxReallocate with NULL", test_default_reallocate) ||
+            !CU_add_test(suite, "test of calloc()", test_default_calloc) ||
             !CU_add_test(suite, "test of free()", test_default_free)
             ) {
         CU_cleanup_registry();