| /* 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> |
| |
| #include <openssl/type_check.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 |
| * of a specific type of object has type |STACK_OF(type)|. This can be defined |
| * (once) with |DEFINE_STACK_OF(type)| and declared where needed with |
| * |DECLARE_STACK_OF(type)|. For example: |
| * |
| * typedef struct foo_st { |
| * int bar; |
| * } FOO; |
| * |
| * DEFINE_STACK_OF(FOO); |
| * |
| * Although note that the stack will contain /pointers/ to |FOO|. |
| * |
| * A macro will be defined for each of the sk_* functions below. For |
| * STACK_OF(FOO), the macros would be sk_FOO_new, sk_FOO_pop etc. */ |
| |
| |
| /* stack_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. */ |
| typedef int (*stack_cmp_func)(const void **a, const void **b); |
| |
| /* 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. */ |
| stack_cmp_func comp; |
| } _STACK; |
| |
| |
| #define STACK_OF(type) struct stack_st_##type |
| |
| #define DECLARE_STACK_OF(type) STACK_OF(type); |
| |
| /* These are the raw stack functions, you shouldn't be using them. Rather you |
| * should be using the type stack macros implemented above. */ |
| |
| /* sk_new creates a new, empty stack with the given comparison function, which |
| * may be zero. It returns the new stack or NULL on allocation failure. */ |
| OPENSSL_EXPORT _STACK *sk_new(stack_cmp_func comp); |
| |
| /* sk_new_null creates a new, empty stack. It returns the new stack or NULL on |
| * allocation failure. */ |
| OPENSSL_EXPORT _STACK *sk_new_null(void); |
| |
| /* sk_num returns the number of elements in |s|. */ |
| OPENSSL_EXPORT size_t sk_num(const _STACK *sk); |
| |
| /* sk_zero resets |sk| to the empty state but does nothing to free the |
| * individual elements themselves. */ |
| OPENSSL_EXPORT void sk_zero(_STACK *sk); |
| |
| /* sk_value returns the |i|th pointer in |sk|, or NULL if |i| is out of |
| * range. */ |
| OPENSSL_EXPORT void *sk_value(const _STACK *sk, size_t i); |
| |
| /* sk_set sets the |i|th pointer in |sk| to |p| and returns |p|. If |i| is out |
| * of range, it returns NULL. */ |
| OPENSSL_EXPORT void *sk_set(_STACK *sk, size_t i, void *p); |
| |
| /* sk_free frees the given stack and array of pointers, but does nothing to |
| * free the individual elements. Also see |sk_pop_free|. */ |
| OPENSSL_EXPORT void sk_free(_STACK *sk); |
| |
| /* sk_pop_free calls |free_func| on each element in the stack and then frees |
| * the stack itself. */ |
| OPENSSL_EXPORT void sk_pop_free(_STACK *sk, void (*free_func)(void *)); |
| |
| /* sk_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. */ |
| OPENSSL_EXPORT size_t sk_insert(_STACK *sk, void *p, size_t where); |
| |
| /* sk_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. */ |
| OPENSSL_EXPORT void *sk_delete(_STACK *sk, size_t where); |
| |
| /* sk_delete_ptr removes, at most, one instance of |p| from the stack based on |
| * pointer equality. If an instance of |p| is found then |p| is returned, |
| * otherwise it returns NULL. */ |
| OPENSSL_EXPORT void *sk_delete_ptr(_STACK *sk, void *p); |
| |
| /* sk_find returns the first value in the stack equal to |p|. If a comparison |
| * function has been set on the stack, then equality is defined by it and the |
| * stack will be sorted if need be so that a binary search can be used. |
| * Otherwise pointer equality is used. If a matching element is found, its |
| * index is written to |*out_index| (if |out_index| is not NULL) and one is |
| * returned. Otherwise zero is returned. */ |
| OPENSSL_EXPORT int sk_find(_STACK *sk, size_t *out_index, void *p); |
| |
| /* sk_shift removes and returns the first element in the stack, or returns NULL |
| * if the stack is empty. */ |
| OPENSSL_EXPORT void *sk_shift(_STACK *sk); |
| |
| /* sk_push appends |p| to the stack and returns the length of the new stack, or |
| * 0 on allocation failure. */ |
| OPENSSL_EXPORT size_t sk_push(_STACK *sk, void *p); |
| |
| /* sk_pop returns and removes the last element on the stack, or NULL if the |
| * stack is empty. */ |
| OPENSSL_EXPORT void *sk_pop(_STACK *sk); |
| |
| /* sk_dup performs a shallow copy of a stack and returns the new stack, or NULL |
| * on error. */ |
| OPENSSL_EXPORT _STACK *sk_dup(const _STACK *sk); |
| |
| /* sk_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. */ |
| OPENSSL_EXPORT void sk_sort(_STACK *sk); |
| |
| /* sk_is_sorted returns one if |sk| is known to be sorted and zero |
| * otherwise. */ |
| OPENSSL_EXPORT int sk_is_sorted(const _STACK *sk); |
| |
| /* sk_set_cmp_func sets the comparison function to be used by |sk| and returns |
| * the previous one. */ |
| OPENSSL_EXPORT stack_cmp_func sk_set_cmp_func(_STACK *sk, stack_cmp_func comp); |
| |
| /* sk_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, |free_func| is used to free |
| * any copies already made and NULL is returned. */ |
| OPENSSL_EXPORT _STACK *sk_deep_copy(const _STACK *sk, |
| void *(*copy_func)(void *), |
| void (*free_func)(void *)); |
| |
| |
| /* Defining stack types. |
| * |
| * This set of macros is used to emit the typed functions that act on a |
| * |STACK_OF(T)|. */ |
| |
| /* Stack functions must be tagged unused to support file-local stack types. |
| * Clang's -Wunused-function only allows unused static inline functions if they |
| * are defined in a header. */ |
| |
| #define DEFINE_STACK_OF_IMPL(name, ptrtype, constptrtype) \ |
| DECLARE_STACK_OF(name); \ |
| \ |
| typedef int (*stack_##name##_cmp_func)(constptrtype *a, constptrtype *b); \ |
| \ |
| static inline OPENSSL_UNUSED STACK_OF(name) * \ |
| sk_##name##_new(stack_##name##_cmp_func comp) { \ |
| return (STACK_OF(name) *)sk_new((stack_cmp_func)comp); \ |
| } \ |
| \ |
| static inline OPENSSL_UNUSED STACK_OF(name) *sk_##name##_new_null(void) { \ |
| return (STACK_OF(name) *)sk_new_null(); \ |
| } \ |
| \ |
| static inline OPENSSL_UNUSED size_t sk_##name##_num( \ |
| const STACK_OF(name) *sk) { \ |
| return sk_num((const _STACK *)sk); \ |
| } \ |
| \ |
| static inline OPENSSL_UNUSED void sk_##name##_zero(STACK_OF(name) *sk) { \ |
| sk_zero((_STACK *)sk); \ |
| } \ |
| \ |
| static inline OPENSSL_UNUSED ptrtype sk_##name##_value( \ |
| const STACK_OF(name) *sk, size_t i) { \ |
| return (ptrtype)sk_value((const _STACK *)sk, i); \ |
| } \ |
| \ |
| static inline OPENSSL_UNUSED ptrtype sk_##name##_set(STACK_OF(name) *sk, \ |
| size_t i, ptrtype p) { \ |
| return (ptrtype)sk_set((_STACK *)sk, i, (void *)p); \ |
| } \ |
| \ |
| static inline OPENSSL_UNUSED void sk_##name##_free(STACK_OF(name) *sk) { \ |
| sk_free((_STACK *)sk); \ |
| } \ |
| \ |
| static inline OPENSSL_UNUSED void sk_##name##_pop_free( \ |
| STACK_OF(name) *sk, void (*free_func)(ptrtype p)) { \ |
| sk_pop_free((_STACK *)sk, (void (*)(void *))free_func); \ |
| } \ |
| \ |
| static inline OPENSSL_UNUSED size_t sk_##name##_insert( \ |
| STACK_OF(name) *sk, ptrtype p, size_t where) { \ |
| return sk_insert((_STACK *)sk, (void *)p, where); \ |
| } \ |
| \ |
| static inline OPENSSL_UNUSED ptrtype sk_##name##_delete(STACK_OF(name) *sk, \ |
| size_t where) { \ |
| return (ptrtype)sk_delete((_STACK *)sk, where); \ |
| } \ |
| \ |
| static inline OPENSSL_UNUSED ptrtype sk_##name##_delete_ptr( \ |
| STACK_OF(name) *sk, ptrtype p) { \ |
| return (ptrtype)sk_delete_ptr((_STACK *)sk, (void *)p); \ |
| } \ |
| \ |
| static inline OPENSSL_UNUSED int sk_##name##_find( \ |
| STACK_OF(name) *sk, size_t *out_index, ptrtype p) { \ |
| return sk_find((_STACK *)sk, out_index, (void *)p); \ |
| } \ |
| \ |
| static inline OPENSSL_UNUSED ptrtype sk_##name##_shift(STACK_OF(name) *sk) { \ |
| return (ptrtype)sk_shift((_STACK *)sk); \ |
| } \ |
| \ |
| static inline OPENSSL_UNUSED size_t sk_##name##_push(STACK_OF(name) *sk, \ |
| ptrtype p) { \ |
| return sk_push((_STACK *)sk, (void *)p); \ |
| } \ |
| \ |
| static inline OPENSSL_UNUSED ptrtype sk_##name##_pop(STACK_OF(name) *sk) { \ |
| return (ptrtype)sk_pop((_STACK *)sk); \ |
| } \ |
| \ |
| static inline OPENSSL_UNUSED STACK_OF(name) * \ |
| sk_##name##_dup(const STACK_OF(name) *sk) { \ |
| return (STACK_OF(name) *)sk_dup((const _STACK *)sk); \ |
| } \ |
| \ |
| static inline OPENSSL_UNUSED void sk_##name##_sort(STACK_OF(name) *sk) { \ |
| sk_sort((_STACK *)sk); \ |
| } \ |
| \ |
| static inline OPENSSL_UNUSED int sk_##name##_is_sorted( \ |
| const STACK_OF(name) *sk) { \ |
| return sk_is_sorted((const _STACK *)sk); \ |
| } \ |
| \ |
| static inline OPENSSL_UNUSED stack_##name##_cmp_func \ |
| sk_##name##_set_cmp_func(STACK_OF(name) *sk, \ |
| stack_##name##_cmp_func comp) { \ |
| return (stack_##name##_cmp_func)sk_set_cmp_func((_STACK *)sk, \ |
| (stack_cmp_func)comp); \ |
| } \ |
| \ |
| static inline OPENSSL_UNUSED STACK_OF(name) * \ |
| sk_##name##_deep_copy(const STACK_OF(name) *sk, \ |
| ptrtype(*copy_func)(ptrtype), \ |
| void (*free_func)(ptrtype)) { \ |
| return (STACK_OF(name) *)sk_deep_copy((_STACK *)sk, \ |
| (void *(*)(void *))copy_func, \ |
| (void (*)(void *))free_func); \ |
| } |
| |
| /* DEFINE_STACK_OF defines |STACK_OF(type)| to be a stack whose elements are |
| * |type| *. */ |
| #define DEFINE_STACK_OF(type) DEFINE_STACK_OF_IMPL(type, type *, const type *) |
| |
| /* DEFINE_CONST_STACK_OF defines |STACK_OF(type)| to be a stack whose elements |
| * are const |type| *. */ |
| #define DEFINE_CONST_STACK_OF(type) \ |
| DEFINE_STACK_OF_IMPL(type, const type *, const type *) |
| |
| /* DEFINE_SPECIAL_STACK_OF defines |STACK_OF(type)| to be a stack whose elements |
| * are |type|, where |type| must be a typedef for a pointer. */ |
| #define DEFINE_SPECIAL_STACK_OF(type) \ |
| OPENSSL_COMPILE_ASSERT(sizeof(type) == sizeof(void *), \ |
| special_stack_of_non_pointer_##type); \ |
| DEFINE_STACK_OF_IMPL(type, type, const type) |
| |
| |
| typedef char *OPENSSL_STRING; |
| |
| DEFINE_STACK_OF(void) |
| DEFINE_SPECIAL_STACK_OF(OPENSSL_STRING) |
| |
| |
| #if defined(__cplusplus) |
| } /* extern C */ |
| #endif |
| |
| #endif /* OPENSSL_HEADER_STACK_H */ |
