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annotate mupdf-source/thirdparty/leptonica/src/stack.h @ 46:7ee69f120f19 default tip

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>>>>> tag v1.26.5+1 for changeset b74429b0f5c4
author Franz Glasner <fzglas.hg@dom66.de>
date Sat, 11 Oct 2025 17:17:30 +0200
parents b50eed0cc0ef
children
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1 /*====================================================================*
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2 - Copyright (C) 2001 Leptonica. All rights reserved.
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3 -
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4 - Redistribution and use in source and binary forms, with or without
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5 - modification, are permitted provided that the following conditions
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6 - are met:
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7 - 1. Redistributions of source code must retain the above copyright
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8 - notice, this list of conditions and the following disclaimer.
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9 - 2. Redistributions in binary form must reproduce the above
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10 - copyright notice, this list of conditions and the following
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11 - disclaimer in the documentation and/or other materials
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12 - provided with the distribution.
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13 -
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14 - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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15 - ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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16 - LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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17 - A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ANY
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18 - CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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19 - EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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20 - PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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21 - PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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22 - OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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23 - NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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24 - SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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25 *====================================================================*/
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27 #ifndef LEPTONICA_STACK_H
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28 #define LEPTONICA_STACK_H
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30 /*!
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31 * \file stack.h
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32 *
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33 * <pre>
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34 * Expandable pointer stack for arbitrary void* data.
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35 *
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36 * The L_Stack is an array of void * ptrs, onto which arbitrary
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37 * objects can be stored. At any time, the number of
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38 * stored objects is stack->n. The object at the bottom
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39 * of the stack is at array[0]; the object at the top of
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40 * the stack is at array[n-1]. New objects are added
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41 * to the top of the stack, at the first available location,
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42 * which is array[n]. Objects are removed from the top of the
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43 * stack. When an attempt is made to remove an object from an
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44 * empty stack, the result is null. When the stack becomes
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45 * filled, so that n = nalloc, the size is doubled.
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46 *
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47 * The auxiliary stack can be used to store and remove
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48 * objects for re-use. It must be created by a separate
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49 * call to pstackCreate(). [Just imagine the chaos if
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50 * pstackCreate() created the auxiliary stack!]
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51 * pstackDestroy() checks for the auxiliary stack and removes it.
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52 * </pre>
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53 */
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56 /*! Expandable pointer stack for arbitrary void* data.
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57 * Note that array[n] is the first null ptr in the array
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58 */
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59 struct L_Stack
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60 {
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61 l_int32 nalloc; /*!< size of ptr array */
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62 l_int32 n; /*!< number of stored elements */
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63 void **array; /*!< ptr array */
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64 struct L_Stack *auxstack; /*!< auxiliary stack */
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65 };
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66 typedef struct L_Stack L_STACK;
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69 #endif /* LEPTONICA_STACK_H */
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