X-Git-Url: https://diplodocus.org/git/nmh/blobdiff_plain/1bd5129468527b24516a9efed711630a33e41a59..c4db59aa4b58bca9cd146ae30f507c16218a67d7:/sbr/utils.c?ds=sidebyside

diff --git a/sbr/utils.c b/sbr/utils.c
index 83c32170..02e8cfb3 100644
--- a/sbr/utils.c
+++ b/sbr/utils.c
@@ -61,22 +61,39 @@ void *mh_xrealloc(void *ptr, size_t size)
     return new;
 }
 
-/*
- * Safely call calloc
- */
-void *
-mh_xcalloc(size_t nmemb, size_t size)
+/* Call calloc(3), exiting on NULL return. */
+void *mh_xcalloc(size_t nelem, size_t elsize)
 {
-    void *memory;
+    void *p;
 
-    if (nmemb == 0  ||  size == 0)
-        adios(NULL, "Tried to calloc 0 bytes");
+    if (!nelem || !elsize)
+        return mh_xmalloc(1); /* Get a unique pointer. */
 
-    if ((memory = calloc(nmemb, size))) {
-        return memory;
-    } else {
-        adios(NULL, "calloc failed");
-    }
+    p = calloc(nelem, elsize);
+    if (!p)
+        adios(NULL, "calloc failed, size wanted: %zu * %zu", nelem, elsize);
+
+    return p;
+}
+
+/* Duplicate a NUL-terminated string, exit on failure. */
+char *mh_xstrdup(const char *src)
+{
+    size_t n;
+    char *dest;
+
+    n = strlen(src) + 1; /* Ignore possibility of overflow. */
+    dest = mh_xmalloc(n);
+    memcpy(dest, src, n);
+
+    return dest;
+}
+
+/* Call free(3), if ptr isn't NULL. */
+void mh_xfree(void *ptr)
+{
+    if (ptr)
+        free(ptr); /* Some very old platforms can't cope with NULL. */
 }
 
 /*