Add, and use, libzahl_memfailure for conciseness, also fix possible unset errno

Signed-off-by: Mattias Andrée <maandree@kth.se>

4 files changed, 15 insertions, 15 deletions

diff --git a/src/allocator.c b/src/allocator.c
index 80668f1..10170ae 100644
--- a/src/allocator.c
+++ b/src/allocator.c
@@ -22,11 +22,8 @@ libzahl_realloc(z_t a, size_t need)
 		a->chars = new;
 	} else {
 		a->chars = realloc(a->chars, new_size * sizeof(zahl_char_t));
-		if (unlikely(!a->chars)) {
-			if (!errno) /* sigh... */
-				errno = ENOMEM;
-			libzahl_failure(errno);
-		}
+		if (unlikely(!a->chars))
+			libzahl_memfailure();
 	}
 	a->alloced = new_size;
 }
diff --git a/src/internals.h b/src/internals.h
index 6454a21..40dd74d 100644
--- a/src/internals.h
+++ b/src/internals.h
@@ -135,6 +135,14 @@ libzahl_failure(int error)
 }
 
 static inline void
+libzahl_memfailure()
+{
+	if (!errno) /* sigh... */
+		errno = ENOENT;
+	libzahl_failure(errno);
+}
+
+static inline void
 zmemcpy(zahl_char_t *restrict d, const zahl_char_t *restrict s, register size_t n)
 {
 	while (n--)
@@ -322,9 +330,7 @@ zinit_temp(z_t a)
 		libzahl_temp_stack = realloc(old, 2 * n * sizeof(*libzahl_temp_stack));
 		if (unlikely(!libzahl_temp_stack)) {
 			libzahl_temp_stack = old;
-			if (!errno) /* sigh... */
-				errno = ENOMEM;
-			libzahl_failure(errno);
+			libzahl_memfailure();
 		}
 		libzahl_temp_stack_head = libzahl_temp_stack + n;
 		libzahl_temp_stack_end = libzahl_temp_stack_head + n;
diff --git a/src/zsetup.c b/src/zsetup.c
index e36bff3..212a1e9 100644
--- a/src/zsetup.c
+++ b/src/zsetup.c
@@ -45,11 +45,8 @@ zsetup(jmp_buf env)
 			zinit(libzahl_tmp_divmod_ds[i]);
 
 		libzahl_temp_stack = malloc(256 * sizeof(*libzahl_temp_stack));
-		if (unlikely(!libzahl_temp_stack)) {
-			if (!errno) /* sigh... */
-				errno = ENOMEM;
-			libzahl_failure(errno);
-		}
+		if (unlikely(!libzahl_temp_stack))
+			libzahl_memfailure();
 		libzahl_temp_stack_head = libzahl_temp_stack;
 		libzahl_temp_stack_end = libzahl_temp_stack + 256;
 	}
diff --git a/src/zstr.c b/src/zstr.c
index cd237df..d10cdff 100644
--- a/src/zstr.c
+++ b/src/zstr.c
@@ -63,7 +63,7 @@ zstr(z_t a, char *b)
 
 	if (unlikely(zzero(a))) {
 		if (unlikely(!b) && unlikely(!(b = malloc(2))))
-			libzahl_failure(errno);
+			libzahl_memfailure();
 		b[0] = '0';
 		b[1] = 0;
 		return b;
@@ -72,7 +72,7 @@ zstr(z_t a, char *b)
 	n = zstr_length(a, 10);
 
 	if (unlikely(!b) && unlikely(!(b = malloc(n + 1))))
-		libzahl_failure(errno);
+		libzahl_memfailure();
 
 	neg = znegative(a);
 	zabs(num, a);