aboutsummaryrefslogtreecommitdiffstats
path: root/libsimple/realloc.h
diff options
context:
space:
mode:
Diffstat (limited to 'libsimple/realloc.h')
-rw-r--r--libsimple/realloc.h260
1 files changed, 259 insertions, 1 deletions
diff --git a/libsimple/realloc.h b/libsimple/realloc.h
index 8ece86d..f976556 100644
--- a/libsimple/realloc.h
+++ b/libsimple/realloc.h
@@ -203,7 +203,7 @@ libsimple_enreallocn(int __status, void *__ptr, size_t __n, ... /*, (size_t)0 */
*/
_LIBSIMPLE_GCC_ONLY(__attribute__((__alloc_size__(2), __warn_unused_result__, __returns_nonnull__)))
static inline void *libsimple_erealloc(void *__ptr, size_t __n)
-{ return enrealloc(libsimple_default_failure_exit, __ptr, __n); }
+{ return libsimple_enrealloc(libsimple_default_failure_exit, __ptr, __n); }
#ifndef erealloc
# define erealloc libsimple_erealloc
#endif
@@ -283,3 +283,261 @@ libsimple_ereallocn(void *__ptr, size_t __n, ... /*, (size_t)0 */)
#ifndef ereallocn
# define ereallocn libsimple_ereallocn
#endif
+
+
+/**
+ * Dynamically reallocates heap allocated, uninitialised,
+ * memory with default alignment (`alignof(max_align_t)`)
+ * as the new alignment
+ *
+ * On success, either `ptr` is returned, or a new non-null
+ * pointer is returned with the same content (truncated to
+ * `n` bytes if size shrunk), in which case `ptr` is
+ * deallocated. On failure `ptr` is deallocated. If `ptr`
+ * is `NULL` a new allocation is made.
+ *
+ * The allocation size will be at least `n * m`
+ *
+ * @param ptr Pointer to reallocated, `NULL` for a new allocation
+ * @param n The number of bytes to allocate, the behaviour of
+ * this function is unspecified for the value 0
+ * @return Either `ptr` or a unique pointer with at least
+ * the specified size and with the alignment
+ * `alignof(max_align_t)`; `NULL` on failure
+ * @throws EINVAL `n` is 0
+ * @throws ENOMEM Could not allocated enough memory
+ */
+_LIBSIMPLE_GCC_ONLY(__attribute__((__alloc_size__(2), __warn_unused_result__)))
+static inline void *
+libsimple_reallocf(void *__ptr, size_t __n) /* TODO test */
+{
+ void *__new = __n ? realloc(__ptr, __n) : NULL;
+ if (!__new)
+ free(__ptr);
+ return __new;
+}
+#ifndef reallocf
+# define reallocf libsimple_reallocf
+#endif
+
+
+/**
+ * Dynamically reallocates heap allocated, uninitialised,
+ * memory with default alignment (`alignof(max_align_t)`)
+ * as the new alignment
+ *
+ * On success, either `ptr` is returned, or a new non-null
+ * pointer is returned with the same content (truncated to
+ * `n` bytes if size shrunk), in which case `ptr` is
+ * deallocated. On failure `ptr` is still valid. If `ptr`
+ * is `NULL` a new allocation is made.
+ *
+ * The allocation size will be at least `n * m`
+ *
+ * @param ptr Pointer to reallocated, `NULL` for a new allocation
+ * @param n The number of elements to allocate, the behaviour of
+ * this function is unspecified for the value 0
+ * @param m Size, in bytes, of each element, the behaviour of
+ * this function is unspecified for the value 0
+ * @return Either `ptr` or a unique pointer with at least
+ * the specified size and with the alignment
+ * `alignof(max_align_t)`; `NULL` on failure
+ * @throws EINVAL `n` or `m` is 0
+ * @throws ENOMEM Could not allocated enough memory
+ */
+_LIBSIMPLE_GCC_ONLY(__attribute__((__alloc_size__(2, 3), __warn_unused_result__)))
+static inline void *
+libsimple_reallocarray(void *__ptr, size_t __n, size_t __m) /* TODO test */
+{
+ if (LIBSIMPLE_UMUL_OVERFLOW(__n, __m, &__n, SIZE_MAX)) {
+ errno = ENOMEM;
+ return NULL;
+ }
+ return realloc(__ptr, __n);
+}
+#ifndef reallocarray
+# define reallocarray libsimple_reallocarray
+#endif
+
+
+/**
+ * Dynamically reallocates heap allocated, uninitialised,
+ * memory with default alignment (`alignof(max_align_t)`)
+ * as the new alignment
+ *
+ * On success, either `ptr` is returned, or a new non-null
+ * pointer is returned with the same content (truncated to
+ * `n` bytes if size shrunk), in which case `ptr` is
+ * deallocated. On failure `ptr` is still valid. If `ptr`
+ * is `NULL` a new allocation is made.
+ *
+ * On failure, the `libsimple_enprintf` function is called,
+ * cause the program to print an error message and exit,
+ * see `libsimple_enprintf` for more information
+ *
+ * The allocation size will be at least `n * m`
+ *
+ * @param ptr Pointer to reallocated, `NULL` for a new allocation
+ * @param n The number of elements to allocate, the behaviour of
+ * this function is unspecified for the value 0
+ * @param m Size, in bytes, of each element, the behaviour of
+ * this function is unspecified for the value 0
+ * @return Either `ptr` or a unique pointer with at least
+ * the specified size and with the alignment
+ * `alignof(max_align_t)`
+ */
+_LIBSIMPLE_GCC_ONLY(__attribute__((__alloc_size__(3, 4), __warn_unused_result__, __returns_nonnull__)))
+void *libsimple_enreallocarray(int, void *, size_t, size_t);
+#ifndef enreallocarray
+# define enreallocarray libsimple_enreallocarray
+#endif
+
+
+/**
+ * Dynamically reallocates heap allocated, uninitialised,
+ * memory with default alignment (`alignof(max_align_t)`)
+ * as the new alignment
+ *
+ * On success, either `ptr` is returned, or a new non-null
+ * pointer is returned with the same content (truncated to
+ * `n` bytes if size shrunk), in which case `ptr` is
+ * deallocated. On failure `ptr` is still valid. If `ptr`
+ * is `NULL` a new allocation is made.
+ *
+ * On failure, the `libsimple_eprintf` function is called,
+ * cause the program to print an error message and exit,
+ * see `libsimple_eprintf` for more information
+ *
+ * The allocation size will be at least `n * m`
+ *
+ * @param ptr Pointer to reallocated, `NULL` for a new allocation
+ * @param n The number of elements to allocate, the behaviour of
+ * this function is unspecified for the value 0
+ * @param m Size, in bytes, of each element, the behaviour of
+ * this function is unspecified for the value 0
+ * @return Either `ptr` or a unique pointer with at least
+ * the specified size and with the alignment
+ * `alignof(max_align_t)`
+ */
+_LIBSIMPLE_GCC_ONLY(__attribute__((__alloc_size__(2, 3), __warn_unused_result__, __returns_nonnull__)))
+static inline void *libsimple_ereallocarray(void *__ptr, size_t __n, size_t __m) /* TODO test */
+{ return libsimple_enreallocarray(libsimple_default_failure_exit, __ptr, __n, __m); }
+#ifndef ereallocarray
+# define ereallocarray libsimple_ereallocarray
+#endif
+
+
+/**
+ * Dynamically reallocates heap allocated, uninitialised,
+ * memory with default alignment (`alignof(max_align_t)`)
+ * as the new alignment
+ *
+ * On success, either `ptr` is returned, or a new non-null
+ * pointer is returned with the same content (truncated to
+ * `n` bytes if size shrunk), in which case `ptr` is
+ * deallocated. On failure `ptr` is deallocated. If `ptr`
+ * is `NULL` a new allocation is made.
+ *
+ * The allocation size will be at least `n * m`
+ *
+ * @param ptr Pointer to reallocated, `NULL` for a new allocation
+ * @param n The number of elements to allocate, the behaviour of
+ * this function is unspecified for the value 0
+ * @param m Size, in bytes, of each element, the behaviour of
+ * this function is unspecified for the value 0
+ * @return Either `ptr` or a unique pointer with at least
+ * the specified size and with the alignment
+ * `alignof(max_align_t)`; `NULL` on failure
+ * @throws EINVAL `n` or `m` is 0
+ * @throws ENOMEM Could not allocated enough memory
+ */
+_LIBSIMPLE_GCC_ONLY(__attribute__((__alloc_size__(2, 3), __warn_unused_result__)))
+static inline void *
+libsimple_reallocarrayf(void *__ptr, size_t __n, size_t __m) /* TODO test */
+{
+ void *__new = __n ? libsimple_reallocarray(__ptr, __n, __m) : NULL;
+ if (!__new)
+ free(__ptr);
+ return __new;
+}
+#ifndef reallocarrayf
+# define reallocarrayf libsimple_reallocarrayf
+#endif
+
+
+/**
+ * Dynamically reallocates heap allocated, uninitialised,
+ * memory with default alignment (`alignof(max_align_t)`)
+ * as the new alignment
+ *
+ * The product of all arguments, up to the first 0,
+ * will be used as the number of bytes to allocated
+ *
+ * On success, either `ptr` is returned, or a new non-null
+ * pointer is returned with the same content (truncated to
+ * `n` bytes if size shrunk), in which case `ptr` is
+ * deallocated. On failure `ptr` is deallocated. If `ptr`
+ * is `NULL` a new allocation is made.
+ *
+ * @param ptr Pointer to reallocated, `NULL` for a new allocation
+ * @param n First factor for the allocation size, must not be 0
+ * @param ap The rest of the factors for the allocation size,
+ * all arguments should have the type `size_t`, and
+ * list must end with 0 (which is not factor)
+ * @return Either `ptr` or a unique pointer with at least
+ * the specified size and with the alignment
+ * `alignof(max_align_t)`; `NULL` on failure
+ * @throws EINVAL `n` is 0
+ * @throws ENOMEM Could not allocated enough memory
+ */
+_LIBSIMPLE_GCC_ONLY(__attribute__((__warn_unused_result__)))
+static inline void *
+libsimple_vreallocfn(void *__ptr, size_t __n, va_list __ap) /* TODO test (reallocfn) */
+{
+ void *__new = libsimple_vreallocn(__ptr, __n, __ap);
+ if (!__new)
+ free(__ptr);
+ return __new;
+}
+#ifndef vreallocfn
+# define vreallocfn libsimple_vreallocfn
+#endif
+
+
+/**
+ * Dynamically reallocates heap allocated, uninitialised,
+ * memory with default alignment (`alignof(max_align_t)`)
+ * as the new alignment
+ *
+ * The product of all arguments, up to the first 0,
+ * will be used as the number of bytes to allocated
+ *
+ * On success, either `ptr` is returned, or a new non-null
+ * pointer is returned with the same content (truncated to
+ * `n` bytes if size shrunk), in which case `ptr` is
+ * deallocated. On failure `ptr` is deallocated. If `ptr`
+ * is `NULL` a new allocation is made.
+ *
+ * @param ptr Pointer to reallocated, `NULL` for a new allocation
+ * @param n First factor for the allocation size, must not be 0
+ * @param ... The rest of the factors for the allocation size,
+ * all arguments should have the type `size_t`, and
+ * list must end with 0 (which is not factor)
+ * @return Either `ptr` or a unique pointer with at least
+ * the specified size and with the alignment
+ * `alignof(max_align_t)`; `NULL` on failure
+ * @throws EINVAL `n` is 0
+ * @throws ENOMEM Could not allocated enough memory
+ */
+_LIBSIMPLE_GCC_ONLY(__attribute__((__warn_unused_result__)))
+static inline void *
+libsimple_reallocfn(void *__ptr, size_t __n, ... /*, (size_t)0 */)
+{
+ va_list __ap;
+ va_start(__ap, __n);
+ return libsimple_vreallocfn(__ptr, __n, __ap);
+ va_end(__ap);
+}
+#ifndef reallocfn
+# define reallocfn libsimple_reallocfn
+#endif