| // Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // https://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #ifndef OPENSSL_HEADER_STACK_H |
| #define OPENSSL_HEADER_STACK_H |
| |
| #include <openssl/base.h> // IWYU pragma: export |
| |
| #if defined(__cplusplus) |
| extern "C" { |
| #endif |
| |
| |
| // A stack, in OpenSSL, is an array of pointers. They are the most commonly |
| // used collection object. |
| // |
| // This file defines macros for type-safe use of the stack functions. A stack |
| // type is named like |STACK_OF(FOO)| and is accessed with functions named |
| // like |sk_FOO_*|. Note the stack will typically contain /pointers/ to |FOO|. |
| // |
| // The |DECLARE_STACK_OF| macro makes |STACK_OF(FOO)| available, and |
| // |DEFINE_STACK_OF| makes the corresponding functions available. |
| |
| |
| // Defining stacks. |
| |
| // STACK_OF expands to the stack type for |type|. |
| #define STACK_OF(type) struct stack_st_##type |
| |
| // DECLARE_STACK_OF declares the |STACK_OF(type)| type. It does not make the |
| // corresponding |sk_type_*| functions available. This macro should be used in |
| // files which only need the type. |
| #define DECLARE_STACK_OF(type) STACK_OF(type); |
| |
| // DEFINE_NAMED_STACK_OF defines |STACK_OF(name)| to be a stack whose elements |
| // are |type| *. This macro makes the |sk_name_*| functions available. |
| // |
| // It is not necessary to use |DECLARE_STACK_OF| in files which use this macro. |
| #define DEFINE_NAMED_STACK_OF(name, type) \ |
| BORINGSSL_DEFINE_STACK_OF_IMPL(name, type *, const type *) \ |
| BORINGSSL_DEFINE_STACK_TRAITS(name, type, false) |
| |
| // DEFINE_STACK_OF defines |STACK_OF(type)| to be a stack whose elements are |
| // |type| *. This macro makes the |sk_type_*| functions available. |
| // |
| // It is not necessary to use |DECLARE_STACK_OF| in files which use this macro. |
| #define DEFINE_STACK_OF(type) DEFINE_NAMED_STACK_OF(type, type) |
| |
| // DEFINE_CONST_STACK_OF defines |STACK_OF(type)| to be a stack whose elements |
| // are const |type| *. This macro makes the |sk_type_*| functions available. |
| // |
| // It is not necessary to use |DECLARE_STACK_OF| in files which use this macro. |
| #define DEFINE_CONST_STACK_OF(type) \ |
| BORINGSSL_DEFINE_STACK_OF_IMPL(type, const type *, const type *) \ |
| BORINGSSL_DEFINE_STACK_TRAITS(type, const type, true) |
| |
| |
| // Using stacks. |
| // |
| // After the |DEFINE_STACK_OF| macro is used, the following functions are |
| // available. |
| |
| #if 0 // Sample |
| |
| // sk_SAMPLE_free_func is a callback to free an element in a stack. |
| typedef void (*sk_SAMPLE_free_func)(SAMPLE *); |
| |
| // sk_SAMPLE_copy_func is a callback to copy an element in a stack. It should |
| // return the copy or NULL on error. |
| typedef SAMPLE *(*sk_SAMPLE_copy_func)(const SAMPLE *); |
| |
| // sk_SAMPLE_cmp_func is a callback to compare |*a| to |*b|. It should return a |
| // value < 0, 0, or > 0 if |*a| is less than, equal to, or greater than |*b|, |
| // respectively. Note the extra indirection - the function is given a pointer |
| // to a pointer to the element. This is the |qsort|/|bsearch| comparison |
| // function applied to an array of |SAMPLE*|. |
| typedef int (*sk_SAMPLE_cmp_func)(const SAMPLE *const *a, |
| const SAMPLE *const *b); |
| |
| // sk_SAMPLE_new creates a new, empty stack with the given comparison function, |
| // which may be NULL. It returns the new stack or NULL on allocation failure. |
| STACK_OF(SAMPLE) *sk_SAMPLE_new(sk_SAMPLE_cmp_func comp); |
| |
| // sk_SAMPLE_new_null creates a new, empty stack. It returns the new stack or |
| // NULL on allocation failure. |
| STACK_OF(SAMPLE) *sk_SAMPLE_new_null(void); |
| |
| // sk_SAMPLE_num returns the number of elements in |sk|. It is safe to cast this |
| // value to |int|. |sk| is guaranteed to have at most |INT_MAX| elements. If |
| // |sk| is NULL, it is treated as the empty list and this function returns zero. |
| size_t sk_SAMPLE_num(const STACK_OF(SAMPLE) *sk); |
| |
| // sk_SAMPLE_zero resets |sk| to the empty state but does nothing to free the |
| // individual elements themselves. |
| void sk_SAMPLE_zero(STACK_OF(SAMPLE) *sk); |
| |
| // sk_SAMPLE_value returns the |i|th pointer in |sk|, or NULL if |i| is out of |
| // range. If |sk| is NULL, it is treated as an empty list and the function |
| // returns NULL. |
| SAMPLE *sk_SAMPLE_value(const STACK_OF(SAMPLE) *sk, size_t i); |
| |
| // sk_SAMPLE_set sets the |i|th pointer in |sk| to |p| and returns |p|. If |i| |
| // is out of range, it returns NULL. |
| SAMPLE *sk_SAMPLE_set(STACK_OF(SAMPLE) *sk, size_t i, SAMPLE *p); |
| |
| // sk_SAMPLE_free frees |sk|, but does nothing to free the individual elements. |
| // Use |sk_SAMPLE_pop_free| to also free the elements. |
| void sk_SAMPLE_free(STACK_OF(SAMPLE) *sk); |
| |
| // sk_SAMPLE_pop_free calls |free_func| on each element in |sk| and then |
| // frees the stack itself. |
| void sk_SAMPLE_pop_free(STACK_OF(SAMPLE) *sk, sk_SAMPLE_free_func free_func); |
| |
| // sk_SAMPLE_insert inserts |p| into the stack at index |where|, moving existing |
| // elements if needed. It returns the length of the new stack, or zero on |
| // error. |
| size_t sk_SAMPLE_insert(STACK_OF(SAMPLE) *sk, SAMPLE *p, size_t where); |
| |
| // sk_SAMPLE_delete removes the pointer at index |where|, moving other elements |
| // down if needed. It returns the removed pointer, or NULL if |where| is out of |
| // range. |
| SAMPLE *sk_SAMPLE_delete(STACK_OF(SAMPLE) *sk, size_t where); |
| |
| // sk_SAMPLE_delete_ptr removes, at most, one instance of |p| from |sk| based on |
| // pointer equality. If an instance of |p| is found then |p| is returned, |
| // otherwise it returns NULL. |
| SAMPLE *sk_SAMPLE_delete_ptr(STACK_OF(SAMPLE) *sk, const SAMPLE *p); |
| |
| // sk_SAMPLE_delete_if_func is the callback function for |sk_SAMPLE_delete_if|. |
| // It should return one to remove |p| and zero to keep it. |
| typedef int (*sk_SAMPLE_delete_if_func)(SAMPLE *p, void *data); |
| |
| // sk_SAMPLE_delete_if calls |func| with each element of |sk| and removes the |
| // entries where |func| returned one. This function does not free or return |
| // removed pointers so, if |sk| owns its contents, |func| should release the |
| // pointers prior to returning one. |
| void sk_SAMPLE_delete_if(STACK_OF(SAMPLE) *sk, sk_SAMPLE_delete_if_func func, |
| void *data); |
| |
| // sk_SAMPLE_find find the first value in |sk| equal to |p|. |sk|'s comparison |
| // function determines equality, or pointer equality if |sk| has no comparison |
| // function. |
| // |
| // If the stack is sorted (see |sk_SAMPLE_sort|), this function uses a binary |
| // search. Otherwise it performs a linear search. If it finds a matching |
| // element, it writes the index to |*out_index| (if |out_index| is not NULL) and |
| // returns one. Otherwise, it returns zero. If |sk| is NULL, it is treated as |
| // the empty list and the function returns zero. |
| // |
| // Note this differs from OpenSSL. The type signature is slightly different, and |
| // OpenSSL's version will implicitly sort |sk| if it has a comparison function |
| // defined. |
| int sk_SAMPLE_find(const STACK_OF(SAMPLE) *sk, size_t *out_index, |
| const SAMPLE *p); |
| |
| // sk_SAMPLE_shift removes and returns the first element in |sk|, or NULL if |
| // |sk| is empty. |
| SAMPLE *sk_SAMPLE_shift(STACK_OF(SAMPLE) *sk); |
| |
| // sk_SAMPLE_push appends |p| to |sk| and returns the length of the new stack, |
| // or 0 on allocation failure. |
| size_t sk_SAMPLE_push(STACK_OF(SAMPLE) *sk, SAMPLE *p); |
| |
| // sk_SAMPLE_pop removes and returns the last element of |sk|, or NULL if |sk| |
| // is empty. |
| SAMPLE *sk_SAMPLE_pop(STACK_OF(SAMPLE) *sk); |
| |
| // sk_SAMPLE_dup performs a shallow copy of a stack and returns the new stack, |
| // or NULL on error. Use |sk_SAMPLE_deep_copy| to also copy the elements. |
| STACK_OF(SAMPLE) *sk_SAMPLE_dup(const STACK_OF(SAMPLE) *sk); |
| |
| // sk_SAMPLE_sort sorts the elements of |sk| into ascending order based on the |
| // comparison function. The stack maintains a "sorted" flag and sorting an |
| // already sorted stack is a no-op. |
| void sk_SAMPLE_sort(STACK_OF(SAMPLE) *sk); |
| |
| // sk_SAMPLE_is_sorted returns one if |sk| is known to be sorted and zero |
| // otherwise. |
| int sk_SAMPLE_is_sorted(const STACK_OF(SAMPLE) *sk); |
| |
| // sk_SAMPLE_set_cmp_func sets the comparison function to be used by |sk| and |
| // returns the previous one. |
| sk_SAMPLE_cmp_func sk_SAMPLE_set_cmp_func(STACK_OF(SAMPLE) *sk, |
| sk_SAMPLE_cmp_func comp); |
| |
| // sk_SAMPLE_deep_copy performs a copy of |sk| and of each of the non-NULL |
| // elements in |sk| by using |copy_func|. If an error occurs, it calls |
| // |free_func| to free any copies already made and returns NULL. |
| STACK_OF(SAMPLE) *sk_SAMPLE_deep_copy(const STACK_OF(SAMPLE) *sk, |
| sk_SAMPLE_copy_func copy_func, |
| sk_SAMPLE_free_func free_func); |
| |
| #endif // Sample |
| |
| |
| // Private functions. |
| // |
| // The |sk_*| functions generated above are implemented internally using the |
| // type-erased functions below. Callers should use the typed wrappers instead. |
| // When using the type-erased functions, callers are responsible for ensuring |
| // the underlying types are correct. Casting pointers to the wrong types will |
| // result in memory errors. |
| |
| // OPENSSL_sk_free_func is a function that frees an element in a stack. Note its |
| // actual type is void (*)(T *) for some T. Low-level |sk_*| functions will be |
| // passed a type-specific wrapper to call it correctly. |
| typedef void (*OPENSSL_sk_free_func)(void *ptr); |
| |
| // OPENSSL_sk_copy_func is a function that copies an element in a stack. Note |
| // its actual type is T *(*)(const T *) for some T. Low-level |sk_*| functions |
| // will be passed a type-specific wrapper to call it correctly. |
| typedef void *(*OPENSSL_sk_copy_func)(const void *ptr); |
| |
| // OPENSSL_sk_cmp_func is a comparison function that returns a value < 0, 0 or > |
| // 0 if |*a| is less than, equal to or greater than |*b|, respectively. Note |
| // the extra indirection - the function is given a pointer to a pointer to the |
| // element. This differs from the usual qsort/bsearch comparison function. |
| // |
| // Note its actual type is |int (*)(const T *const *a, const T *const *b)|. |
| // Low-level |sk_*| functions will be passed a type-specific wrapper to call it |
| // correctly. |
| typedef int (*OPENSSL_sk_cmp_func)(const void *const *a, const void *const *b); |
| |
| // OPENSSL_sk_delete_if_func is the generic version of |
| // |sk_SAMPLE_delete_if_func|. |
| typedef int (*OPENSSL_sk_delete_if_func)(void *obj, void *data); |
| |
| // The following function types call the above type-erased signatures with the |
| // true types. |
| typedef void (*OPENSSL_sk_call_free_func)(OPENSSL_sk_free_func, void *); |
| typedef void *(*OPENSSL_sk_call_copy_func)(OPENSSL_sk_copy_func, const void *); |
| typedef int (*OPENSSL_sk_call_cmp_func)(OPENSSL_sk_cmp_func, const void *, |
| const void *); |
| typedef int (*OPENSSL_sk_call_delete_if_func)(OPENSSL_sk_delete_if_func, void *, |
| void *); |
| |
| // An OPENSSL_STACK contains an array of pointers. It is not designed to be used |
| // directly, rather the wrapper macros should be used. |
| typedef struct stack_st OPENSSL_STACK; |
| |
| // The following are raw stack functions. They implement the corresponding typed |
| // |sk_SAMPLE_*| functions generated by |DEFINE_STACK_OF|. Callers shouldn't be |
| // using them. Rather, callers should use the typed functions. |
| OPENSSL_EXPORT OPENSSL_STACK *OPENSSL_sk_new(OPENSSL_sk_cmp_func comp); |
| OPENSSL_EXPORT OPENSSL_STACK *OPENSSL_sk_new_null(void); |
| OPENSSL_EXPORT size_t OPENSSL_sk_num(const OPENSSL_STACK *sk); |
| OPENSSL_EXPORT void OPENSSL_sk_zero(OPENSSL_STACK *sk); |
| OPENSSL_EXPORT void *OPENSSL_sk_value(const OPENSSL_STACK *sk, size_t i); |
| OPENSSL_EXPORT void *OPENSSL_sk_set(OPENSSL_STACK *sk, size_t i, void *p); |
| OPENSSL_EXPORT void OPENSSL_sk_free(OPENSSL_STACK *sk); |
| OPENSSL_EXPORT void OPENSSL_sk_pop_free_ex( |
| OPENSSL_STACK *sk, OPENSSL_sk_call_free_func call_free_func, |
| OPENSSL_sk_free_func free_func); |
| OPENSSL_EXPORT size_t OPENSSL_sk_insert(OPENSSL_STACK *sk, void *p, |
| size_t where); |
| OPENSSL_EXPORT void *OPENSSL_sk_delete(OPENSSL_STACK *sk, size_t where); |
| OPENSSL_EXPORT void *OPENSSL_sk_delete_ptr(OPENSSL_STACK *sk, const void *p); |
| OPENSSL_EXPORT void OPENSSL_sk_delete_if( |
| OPENSSL_STACK *sk, OPENSSL_sk_call_delete_if_func call_func, |
| OPENSSL_sk_delete_if_func func, void *data); |
| OPENSSL_EXPORT int OPENSSL_sk_find(const OPENSSL_STACK *sk, size_t *out_index, |
| const void *p, |
| OPENSSL_sk_call_cmp_func call_cmp_func); |
| OPENSSL_EXPORT void *OPENSSL_sk_shift(OPENSSL_STACK *sk); |
| OPENSSL_EXPORT size_t OPENSSL_sk_push(OPENSSL_STACK *sk, void *p); |
| OPENSSL_EXPORT void *OPENSSL_sk_pop(OPENSSL_STACK *sk); |
| OPENSSL_EXPORT OPENSSL_STACK *OPENSSL_sk_dup(const OPENSSL_STACK *sk); |
| OPENSSL_EXPORT void OPENSSL_sk_sort(OPENSSL_STACK *sk, |
| OPENSSL_sk_call_cmp_func call_cmp_func); |
| OPENSSL_EXPORT int OPENSSL_sk_is_sorted(const OPENSSL_STACK *sk); |
| OPENSSL_EXPORT OPENSSL_sk_cmp_func |
| OPENSSL_sk_set_cmp_func(OPENSSL_STACK *sk, OPENSSL_sk_cmp_func comp); |
| OPENSSL_EXPORT OPENSSL_STACK *OPENSSL_sk_deep_copy( |
| const OPENSSL_STACK *sk, OPENSSL_sk_call_copy_func call_copy_func, |
| OPENSSL_sk_copy_func copy_func, OPENSSL_sk_call_free_func call_free_func, |
| OPENSSL_sk_free_func free_func); |
| |
| |
| // Deprecated private functions (hidden). |
| // |
| // TODO(crbug.com/boringssl/499): Migrate callers to the typed wrappers, or at |
| // least the new names and remove the old ones. |
| // |
| // TODO(b/290792019, b/290785937): Ideally these would at least be inline |
| // functions, so we do not squat the symbols. |
| |
| typedef OPENSSL_STACK _STACK; |
| |
| // The following functions call the corresponding |OPENSSL_sk_*| function. |
| OPENSSL_EXPORT OPENSSL_DEPRECATED OPENSSL_STACK *sk_new_null(void); |
| OPENSSL_EXPORT OPENSSL_DEPRECATED size_t sk_num(const OPENSSL_STACK *sk); |
| OPENSSL_EXPORT OPENSSL_DEPRECATED void *sk_value(const OPENSSL_STACK *sk, |
| size_t i); |
| OPENSSL_EXPORT OPENSSL_DEPRECATED void sk_free(OPENSSL_STACK *sk); |
| OPENSSL_EXPORT OPENSSL_DEPRECATED size_t sk_push(OPENSSL_STACK *sk, void *p); |
| OPENSSL_EXPORT OPENSSL_DEPRECATED void *sk_pop(OPENSSL_STACK *sk); |
| |
| // sk_pop_free_ex calls |OPENSSL_sk_pop_free_ex|. |
| // |
| // TODO(b/291994116): Remove this. |
| OPENSSL_EXPORT OPENSSL_DEPRECATED void sk_pop_free_ex( |
| OPENSSL_STACK *sk, OPENSSL_sk_call_free_func call_free_func, |
| OPENSSL_sk_free_func free_func); |
| |
| // sk_pop_free behaves like |OPENSSL_sk_pop_free_ex| but performs an invalid |
| // function pointer cast. It exists because some existing callers called |
| // |sk_pop_free| directly. |
| // |
| // TODO(davidben): Migrate callers to bssl::UniquePtr and remove this. |
| OPENSSL_EXPORT OPENSSL_DEPRECATED void sk_pop_free( |
| OPENSSL_STACK *sk, OPENSSL_sk_free_func free_func); |
| |
| |
| #if !defined(BORINGSSL_NO_CXX) |
| extern "C++" { |
| BSSL_NAMESPACE_BEGIN |
| namespace internal { |
| template <typename T> |
| struct StackTraits {}; |
| } |
| BSSL_NAMESPACE_END |
| } |
| |
| #define BORINGSSL_DEFINE_STACK_TRAITS(name, type, is_const) \ |
| extern "C++" { \ |
| BSSL_NAMESPACE_BEGIN \ |
| namespace internal { \ |
| template <> \ |
| struct StackTraits<STACK_OF(name)> { \ |
| static constexpr bool kIsStack = true; \ |
| using Type = type; \ |
| static constexpr bool kIsConst = is_const; \ |
| }; \ |
| } \ |
| BSSL_NAMESPACE_END \ |
| } |
| |
| #else |
| #define BORINGSSL_DEFINE_STACK_TRAITS(name, type, is_const) |
| #endif |
| |
| #define BORINGSSL_DEFINE_STACK_OF_IMPL(name, ptrtype, constptrtype) \ |
| /* We disable MSVC C4191 in this macro, which warns when pointers are cast \ |
| * to the wrong type. While the cast itself is valid, it is often a bug \ |
| * because calling it through the cast is UB. However, we never actually \ |
| * call functions as |OPENSSL_sk_cmp_func|. The type is just a type-erased \ |
| * function pointer. (C does not guarantee function pointers fit in \ |
| * |void*|, and GCC will warn on this.) Thus we just disable the false \ |
| * positive warning. */ \ |
| OPENSSL_MSVC_PRAGMA(warning(push)) \ |
| OPENSSL_MSVC_PRAGMA(warning(disable : 4191)) \ |
| OPENSSL_GNUC_CLANG_PRAGMA("GCC diagnostic push") \ |
| OPENSSL_CLANG_PRAGMA( \ |
| "clang diagnostic ignored \"-Wunknown-warning-option\"") \ |
| OPENSSL_CLANG_PRAGMA( \ |
| "clang diagnostic ignored \"-Wcast-function-type-strict\"") \ |
| /* We also disable -Wcast-qual. As part of this C-based type erasure setup, \ |
| * the wrapper macros need to cast away const in places. In C++, const_cast \ |
| * suppresses the warning, but it seemingly cannot be suppressed in C. */ \ |
| OPENSSL_GNUC_CLANG_PRAGMA("GCC diagnostic ignored \"-Wcast-qual\"") \ |
| \ |
| DECLARE_STACK_OF(name) \ |
| \ |
| typedef void (*sk_##name##_free_func)(ptrtype); \ |
| typedef ptrtype (*sk_##name##_copy_func)(constptrtype); \ |
| typedef int (*sk_##name##_cmp_func)(constptrtype const *, \ |
| constptrtype const *); \ |
| typedef int (*sk_##name##_delete_if_func)(ptrtype, void *); \ |
| \ |
| OPENSSL_INLINE void sk_##name##_call_free_func( \ |
| OPENSSL_sk_free_func free_func, void *ptr) { \ |
| ((sk_##name##_free_func)free_func)((ptrtype)ptr); \ |
| } \ |
| \ |
| OPENSSL_INLINE void *sk_##name##_call_copy_func( \ |
| OPENSSL_sk_copy_func copy_func, const void *ptr) { \ |
| return (void *)((sk_##name##_copy_func)copy_func)((constptrtype)ptr); \ |
| } \ |
| \ |
| OPENSSL_INLINE int sk_##name##_call_cmp_func(OPENSSL_sk_cmp_func cmp_func, \ |
| const void *a, const void *b) { \ |
| constptrtype a_ptr = (constptrtype)a; \ |
| constptrtype b_ptr = (constptrtype)b; \ |
| /* |cmp_func| expects an extra layer of pointers to match qsort. */ \ |
| return ((sk_##name##_cmp_func)cmp_func)(&a_ptr, &b_ptr); \ |
| } \ |
| \ |
| OPENSSL_INLINE int sk_##name##_call_delete_if_func( \ |
| OPENSSL_sk_delete_if_func func, void *obj, void *data) { \ |
| return ((sk_##name##_delete_if_func)func)((ptrtype)obj, data); \ |
| } \ |
| \ |
| OPENSSL_INLINE STACK_OF(name) *sk_##name##_new(sk_##name##_cmp_func comp) { \ |
| return (STACK_OF(name) *)OPENSSL_sk_new((OPENSSL_sk_cmp_func)comp); \ |
| } \ |
| \ |
| OPENSSL_INLINE STACK_OF(name) *sk_##name##_new_null(void) { \ |
| return (STACK_OF(name) *)OPENSSL_sk_new_null(); \ |
| } \ |
| \ |
| OPENSSL_INLINE size_t sk_##name##_num(const STACK_OF(name) *sk) { \ |
| return OPENSSL_sk_num((const OPENSSL_STACK *)sk); \ |
| } \ |
| \ |
| OPENSSL_INLINE void sk_##name##_zero(STACK_OF(name) *sk) { \ |
| OPENSSL_sk_zero((OPENSSL_STACK *)sk); \ |
| } \ |
| \ |
| OPENSSL_INLINE ptrtype sk_##name##_value(const STACK_OF(name) *sk, \ |
| size_t i) { \ |
| return (ptrtype)OPENSSL_sk_value((const OPENSSL_STACK *)sk, i); \ |
| } \ |
| \ |
| OPENSSL_INLINE ptrtype sk_##name##_set(STACK_OF(name) *sk, size_t i, \ |
| ptrtype p) { \ |
| return (ptrtype)OPENSSL_sk_set((OPENSSL_STACK *)sk, i, (void *)p); \ |
| } \ |
| \ |
| OPENSSL_INLINE void sk_##name##_free(STACK_OF(name) *sk) { \ |
| OPENSSL_sk_free((OPENSSL_STACK *)sk); \ |
| } \ |
| \ |
| OPENSSL_INLINE void sk_##name##_pop_free(STACK_OF(name) *sk, \ |
| sk_##name##_free_func free_func) { \ |
| OPENSSL_sk_pop_free_ex((OPENSSL_STACK *)sk, sk_##name##_call_free_func, \ |
| (OPENSSL_sk_free_func)free_func); \ |
| } \ |
| \ |
| OPENSSL_INLINE size_t sk_##name##_insert(STACK_OF(name) *sk, ptrtype p, \ |
| size_t where) { \ |
| return OPENSSL_sk_insert((OPENSSL_STACK *)sk, (void *)p, where); \ |
| } \ |
| \ |
| OPENSSL_INLINE ptrtype sk_##name##_delete(STACK_OF(name) *sk, \ |
| size_t where) { \ |
| return (ptrtype)OPENSSL_sk_delete((OPENSSL_STACK *)sk, where); \ |
| } \ |
| \ |
| OPENSSL_INLINE ptrtype sk_##name##_delete_ptr(STACK_OF(name) *sk, \ |
| constptrtype p) { \ |
| return (ptrtype)OPENSSL_sk_delete_ptr((OPENSSL_STACK *)sk, \ |
| (const void *)p); \ |
| } \ |
| \ |
| OPENSSL_INLINE void sk_##name##_delete_if( \ |
| STACK_OF(name) *sk, sk_##name##_delete_if_func func, void *data) { \ |
| OPENSSL_sk_delete_if((OPENSSL_STACK *)sk, sk_##name##_call_delete_if_func, \ |
| (OPENSSL_sk_delete_if_func)func, data); \ |
| } \ |
| \ |
| OPENSSL_INLINE int sk_##name##_find(const STACK_OF(name) *sk, \ |
| size_t *out_index, constptrtype p) { \ |
| return OPENSSL_sk_find((const OPENSSL_STACK *)sk, out_index, \ |
| (const void *)p, sk_##name##_call_cmp_func); \ |
| } \ |
| \ |
| OPENSSL_INLINE ptrtype sk_##name##_shift(STACK_OF(name) *sk) { \ |
| return (ptrtype)OPENSSL_sk_shift((OPENSSL_STACK *)sk); \ |
| } \ |
| \ |
| OPENSSL_INLINE size_t sk_##name##_push(STACK_OF(name) *sk, ptrtype p) { \ |
| return OPENSSL_sk_push((OPENSSL_STACK *)sk, (void *)p); \ |
| } \ |
| \ |
| OPENSSL_INLINE ptrtype sk_##name##_pop(STACK_OF(name) *sk) { \ |
| return (ptrtype)OPENSSL_sk_pop((OPENSSL_STACK *)sk); \ |
| } \ |
| \ |
| OPENSSL_INLINE STACK_OF(name) *sk_##name##_dup(const STACK_OF(name) *sk) { \ |
| return (STACK_OF(name) *)OPENSSL_sk_dup((const OPENSSL_STACK *)sk); \ |
| } \ |
| \ |
| OPENSSL_INLINE void sk_##name##_sort(STACK_OF(name) *sk) { \ |
| OPENSSL_sk_sort((OPENSSL_STACK *)sk, sk_##name##_call_cmp_func); \ |
| } \ |
| \ |
| OPENSSL_INLINE int sk_##name##_is_sorted(const STACK_OF(name) *sk) { \ |
| return OPENSSL_sk_is_sorted((const OPENSSL_STACK *)sk); \ |
| } \ |
| \ |
| OPENSSL_INLINE sk_##name##_cmp_func sk_##name##_set_cmp_func( \ |
| STACK_OF(name) *sk, sk_##name##_cmp_func comp) { \ |
| return (sk_##name##_cmp_func)OPENSSL_sk_set_cmp_func( \ |
| (OPENSSL_STACK *)sk, (OPENSSL_sk_cmp_func)comp); \ |
| } \ |
| \ |
| OPENSSL_INLINE STACK_OF(name) *sk_##name##_deep_copy( \ |
| const STACK_OF(name) *sk, sk_##name##_copy_func copy_func, \ |
| sk_##name##_free_func free_func) { \ |
| return (STACK_OF(name) *)OPENSSL_sk_deep_copy( \ |
| (const OPENSSL_STACK *)sk, sk_##name##_call_copy_func, \ |
| (OPENSSL_sk_copy_func)copy_func, sk_##name##_call_free_func, \ |
| (OPENSSL_sk_free_func)free_func); \ |
| } \ |
| \ |
| OPENSSL_GNUC_CLANG_PRAGMA("GCC diagnostic pop") \ |
| OPENSSL_MSVC_PRAGMA(warning(pop)) |
| |
| |
| // Built-in stacks. |
| |
| typedef char *OPENSSL_STRING; |
| |
| DEFINE_STACK_OF(void) |
| DEFINE_NAMED_STACK_OF(OPENSSL_STRING, char) |
| |
| |
| #if defined(__cplusplus) |
| } // extern C |
| #endif |
| |
| #if !defined(BORINGSSL_NO_CXX) |
| extern "C++" { |
| |
| #include <type_traits> |
| |
| BSSL_NAMESPACE_BEGIN |
| |
| namespace internal { |
| |
| // Stacks defined with |DEFINE_CONST_STACK_OF| are freed with |sk_free|. |
| template <typename Stack> |
| struct DeleterImpl<Stack, std::enable_if_t<StackTraits<Stack>::kIsConst>> { |
| static void Free(Stack *sk) { |
| OPENSSL_sk_free(reinterpret_cast<OPENSSL_STACK *>(sk)); |
| } |
| }; |
| |
| // Stacks defined with |DEFINE_STACK_OF| are freed with |sk_pop_free| and the |
| // corresponding type's deleter. |
| template <typename Stack> |
| struct DeleterImpl<Stack, std::enable_if_t<!StackTraits<Stack>::kIsConst>> { |
| static void Free(Stack *sk) { |
| // sk_FOO_pop_free is defined by macros and bound by name, so we cannot |
| // access it from C++ here. |
| using Type = typename StackTraits<Stack>::Type; |
| OPENSSL_sk_pop_free_ex( |
| reinterpret_cast<OPENSSL_STACK *>(sk), |
| [](OPENSSL_sk_free_func /* unused */, void *ptr) { |
| DeleterImpl<Type>::Free(reinterpret_cast<Type *>(ptr)); |
| }, |
| nullptr); |
| } |
| }; |
| |
| template <typename Stack> |
| class StackIteratorImpl { |
| public: |
| using Type = typename StackTraits<Stack>::Type; |
| // Iterators must be default-constructable. |
| StackIteratorImpl() : sk_(nullptr), idx_(0) {} |
| StackIteratorImpl(const Stack *sk, size_t idx) : sk_(sk), idx_(idx) {} |
| |
| bool operator==(StackIteratorImpl other) const { |
| return sk_ == other.sk_ && idx_ == other.idx_; |
| } |
| bool operator!=(StackIteratorImpl other) const { |
| return !(*this == other); |
| } |
| |
| Type *operator*() const { |
| return reinterpret_cast<Type *>( |
| OPENSSL_sk_value(reinterpret_cast<const OPENSSL_STACK *>(sk_), idx_)); |
| } |
| |
| StackIteratorImpl &operator++(/* prefix */) { |
| idx_++; |
| return *this; |
| } |
| |
| StackIteratorImpl operator++(int /* postfix */) { |
| StackIteratorImpl copy(*this); |
| ++(*this); |
| return copy; |
| } |
| |
| private: |
| const Stack *sk_; |
| size_t idx_; |
| }; |
| |
| template <typename Stack> |
| using StackIterator = |
| std::enable_if_t<StackTraits<Stack>::kIsStack, StackIteratorImpl<Stack>>; |
| |
| } // namespace internal |
| |
| // PushToStack pushes |elem| to |sk|. It returns true on success and false on |
| // allocation failure. |
| template <typename Stack> |
| inline std::enable_if_t<!internal::StackTraits<Stack>::kIsConst, bool> |
| PushToStack(Stack *sk, |
| UniquePtr<typename internal::StackTraits<Stack>::Type> elem) { |
| if (!OPENSSL_sk_push(reinterpret_cast<OPENSSL_STACK *>(sk), elem.get())) { |
| return false; |
| } |
| // OPENSSL_sk_push takes ownership on success. |
| elem.release(); |
| return true; |
| } |
| |
| BSSL_NAMESPACE_END |
| |
| // Define begin() and end() for stack types so C++ range for loops work. |
| template <typename Stack> |
| inline bssl::internal::StackIterator<Stack> begin(const Stack *sk) { |
| return bssl::internal::StackIterator<Stack>(sk, 0); |
| } |
| |
| template <typename Stack> |
| inline bssl::internal::StackIterator<Stack> end(const Stack *sk) { |
| return bssl::internal::StackIterator<Stack>( |
| sk, OPENSSL_sk_num(reinterpret_cast<const OPENSSL_STACK *>(sk))); |
| } |
| |
| } // extern C++ |
| #endif |
| |
| #endif // OPENSSL_HEADER_STACK_H |
