| /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
| * All rights reserved. |
| * |
| * This package is an SSL implementation written |
| * by Eric Young (eay@cryptsoft.com). |
| * The implementation was written so as to conform with Netscapes SSL. |
| * |
| * This library is free for commercial and non-commercial use as long as |
| * the following conditions are aheared to. The following conditions |
| * apply to all code found in this distribution, be it the RC4, RSA, |
| * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
| * included with this distribution is covered by the same copyright terms |
| * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
| * |
| * Copyright remains Eric Young's, and as such any Copyright notices in |
| * the code are not to be removed. |
| * If this package is used in a product, Eric Young should be given attribution |
| * as the author of the parts of the library used. |
| * This can be in the form of a textual message at program startup or |
| * in documentation (online or textual) provided with the package. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. All advertising materials mentioning features or use of this software |
| * must display the following acknowledgement: |
| * "This product includes cryptographic software written by |
| * Eric Young (eay@cryptsoft.com)" |
| * The word 'cryptographic' can be left out if the rouines from the library |
| * being used are not cryptographic related :-). |
| * 4. If you include any Windows specific code (or a derivative thereof) from |
| * the apps directory (application code) you must include an acknowledgement: |
| * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
| * |
| * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * |
| * The licence and distribution terms for any publically available version or |
| * derivative of this code cannot be changed. i.e. this code cannot simply be |
| * copied and put under another distribution licence |
| * [including the GNU Public Licence.] */ |
| |
| #ifndef OPENSSL_HEADER_STACK_H |
| #define OPENSSL_HEADER_STACK_H |
| |
| #include <openssl/base.h> |
| |
| #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)(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*|. |
| // |
| // TODO(https://crbug.com/boringssl/498): The parameters should be |
| // |const SAMPLE *const *|. |
| typedef int (*sk_SAMPLE_cmp_func)(const SAMPLE **a, const SAMPLE **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|. |
| 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. |
| 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_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. |
| // |
| // 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. |
| // |
| // TODO(https://crbug.com/boringssl/499): Rename to |OPENSSL_sk_foo|, after |
| // external code that calls them is fixed. |
| |
| // 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 *(*)(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)(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 **a, const T **b)|. Low-level |sk_*| |
| // functions will be passed a type-specific wrapper to call it correctly. |
| // |
| // TODO(davidben): This type should be |const T *const *|. It is already fixed |
| // in OpenSSL 1.1.1, so hopefully we can fix this compatibly. |
| typedef int (*OPENSSL_sk_cmp_func)(const void **a, const void **b); |
| |
| // 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, void *); |
| typedef int (*OPENSSL_sk_call_cmp_func)(OPENSSL_sk_cmp_func, |
| const void *const *, |
| const void *const *); |
| |
| // stack_st contains an array of pointers. It is not designed to be used |
| // directly, rather the wrapper macros should be used. |
| typedef struct stack_st { |
| // num contains the number of valid pointers in |data|. |
| size_t num; |
| void **data; |
| // sorted is non-zero if the values pointed to by |data| are in ascending |
| // order, based on |comp|. |
| int sorted; |
| // num_alloc contains the number of pointers allocated in the buffer pointed |
| // to by |data|, which may be larger than |num|. |
| size_t num_alloc; |
| // comp is an optional comparison function. |
| OPENSSL_sk_cmp_func comp; |
| } _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 _STACK *sk_new(OPENSSL_sk_cmp_func comp); |
| OPENSSL_EXPORT _STACK *sk_new_null(void); |
| OPENSSL_EXPORT size_t sk_num(const _STACK *sk); |
| OPENSSL_EXPORT void sk_zero(_STACK *sk); |
| OPENSSL_EXPORT void *sk_value(const _STACK *sk, size_t i); |
| OPENSSL_EXPORT void *sk_set(_STACK *sk, size_t i, void *p); |
| OPENSSL_EXPORT void sk_free(_STACK *sk); |
| OPENSSL_EXPORT void sk_pop_free_ex(_STACK *sk, |
| OPENSSL_sk_call_free_func call_free_func, |
| OPENSSL_sk_free_func free_func); |
| OPENSSL_EXPORT size_t sk_insert(_STACK *sk, void *p, size_t where); |
| OPENSSL_EXPORT void *sk_delete(_STACK *sk, size_t where); |
| OPENSSL_EXPORT void *sk_delete_ptr(_STACK *sk, const void *p); |
| OPENSSL_EXPORT int sk_find(const _STACK *sk, size_t *out_index, const void *p, |
| OPENSSL_sk_call_cmp_func call_cmp_func); |
| OPENSSL_EXPORT void *sk_shift(_STACK *sk); |
| OPENSSL_EXPORT size_t sk_push(_STACK *sk, void *p); |
| OPENSSL_EXPORT void *sk_pop(_STACK *sk); |
| OPENSSL_EXPORT _STACK *sk_dup(const _STACK *sk); |
| OPENSSL_EXPORT void sk_sort(_STACK *sk, OPENSSL_sk_call_cmp_func call_cmp_func); |
| OPENSSL_EXPORT int sk_is_sorted(const _STACK *sk); |
| OPENSSL_EXPORT OPENSSL_sk_cmp_func sk_set_cmp_func(_STACK *sk, |
| OPENSSL_sk_cmp_func comp); |
| OPENSSL_EXPORT _STACK *sk_deep_copy(const _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); |
| |
| // sk_pop_free behaves like |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 void sk_pop_free(_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)) \ |
| \ |
| DECLARE_STACK_OF(name) \ |
| \ |
| typedef void (*sk_##name##_free_func)(ptrtype); \ |
| typedef ptrtype (*sk_##name##_copy_func)(ptrtype); \ |
| typedef int (*sk_##name##_cmp_func)(constptrtype *a, constptrtype *b); \ |
| \ |
| 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, void *ptr) { \ |
| return (void *)((sk_##name##_copy_func)copy_func)((ptrtype)ptr); \ |
| } \ |
| \ |
| OPENSSL_INLINE int sk_##name##_call_cmp_func(OPENSSL_sk_cmp_func cmp_func, \ |
| const void *const *a, \ |
| const void *const *b) { \ |
| /* The data is actually stored as |void*| pointers, so read the pointer \ |
| * as |void*| and then pass the corrected type into the caller-supplied \ |
| * function, which expects |constptrtype*|. */ \ |
| constptrtype a_ptr = (constptrtype)*a; \ |
| constptrtype b_ptr = (constptrtype)*b; \ |
| return ((sk_##name##_cmp_func)cmp_func)(&a_ptr, &b_ptr); \ |
| } \ |
| \ |
| OPENSSL_INLINE STACK_OF(name) *sk_##name##_new(sk_##name##_cmp_func comp) { \ |
| return (STACK_OF(name) *)sk_new((OPENSSL_sk_cmp_func)comp); \ |
| } \ |
| \ |
| OPENSSL_INLINE STACK_OF(name) *sk_##name##_new_null(void) { \ |
| return (STACK_OF(name) *)sk_new_null(); \ |
| } \ |
| \ |
| OPENSSL_INLINE size_t sk_##name##_num(const STACK_OF(name) *sk) { \ |
| return sk_num((const _STACK *)sk); \ |
| } \ |
| \ |
| OPENSSL_INLINE void sk_##name##_zero(STACK_OF(name) *sk) { \ |
| sk_zero((_STACK *)sk); \ |
| } \ |
| \ |
| OPENSSL_INLINE ptrtype sk_##name##_value(const STACK_OF(name) *sk, \ |
| size_t i) { \ |
| return (ptrtype)sk_value((const _STACK *)sk, i); \ |
| } \ |
| \ |
| OPENSSL_INLINE ptrtype sk_##name##_set(STACK_OF(name) *sk, size_t i, \ |
| ptrtype p) { \ |
| return (ptrtype)sk_set((_STACK *)sk, i, (void *)p); \ |
| } \ |
| \ |
| OPENSSL_INLINE void sk_##name##_free(STACK_OF(name) *sk) { \ |
| sk_free((_STACK *)sk); \ |
| } \ |
| \ |
| OPENSSL_INLINE void sk_##name##_pop_free(STACK_OF(name) *sk, \ |
| sk_##name##_free_func free_func) { \ |
| sk_pop_free_ex((_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 sk_insert((_STACK *)sk, (void *)p, where); \ |
| } \ |
| \ |
| OPENSSL_INLINE ptrtype sk_##name##_delete(STACK_OF(name) *sk, \ |
| size_t where) { \ |
| return (ptrtype)sk_delete((_STACK *)sk, where); \ |
| } \ |
| \ |
| OPENSSL_INLINE ptrtype sk_##name##_delete_ptr(STACK_OF(name) *sk, \ |
| constptrtype p) { \ |
| return (ptrtype)sk_delete_ptr((_STACK *)sk, (const void *)p); \ |
| } \ |
| \ |
| OPENSSL_INLINE int sk_##name##_find(const STACK_OF(name) *sk, \ |
| size_t *out_index, constptrtype p) { \ |
| return sk_find((const _STACK *)sk, out_index, (const void *)p, \ |
| sk_##name##_call_cmp_func); \ |
| } \ |
| \ |
| OPENSSL_INLINE ptrtype sk_##name##_shift(STACK_OF(name) *sk) { \ |
| return (ptrtype)sk_shift((_STACK *)sk); \ |
| } \ |
| \ |
| OPENSSL_INLINE size_t sk_##name##_push(STACK_OF(name) *sk, ptrtype p) { \ |
| return sk_push((_STACK *)sk, (void *)p); \ |
| } \ |
| \ |
| OPENSSL_INLINE ptrtype sk_##name##_pop(STACK_OF(name) *sk) { \ |
| return (ptrtype)sk_pop((_STACK *)sk); \ |
| } \ |
| \ |
| OPENSSL_INLINE STACK_OF(name) *sk_##name##_dup(const STACK_OF(name) *sk) { \ |
| return (STACK_OF(name) *)sk_dup((const _STACK *)sk); \ |
| } \ |
| \ |
| OPENSSL_INLINE void sk_##name##_sort(STACK_OF(name) *sk) { \ |
| sk_sort((_STACK *)sk, sk_##name##_call_cmp_func); \ |
| } \ |
| \ |
| OPENSSL_INLINE int sk_##name##_is_sorted(const STACK_OF(name) *sk) { \ |
| return sk_is_sorted((const _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)sk_set_cmp_func((_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) *)sk_deep_copy( \ |
| (const _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_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) { sk_free(reinterpret_cast<_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; |
| sk_pop_free_ex(reinterpret_cast<_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 *>( |
| sk_value(reinterpret_cast<const _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 (!sk_push(reinterpret_cast<_STACK *>(sk), elem.get())) { |
| return false; |
| } |
| // 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, sk_num(reinterpret_cast<const _STACK *>(sk))); |
| } |
| |
| } // extern C++ |
| #endif |
| |
| #endif // OPENSSL_HEADER_STACK_H |
