ralloc: Add a fake implementation of ralloc based on talloc.
This commit is contained in:
parent
7d9e0ea739
commit
dc55254f5b
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@ -17,6 +17,7 @@ GLCPP_SOURCES = \
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C_SOURCES = \
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strtod.c \
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ralloc.c \
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$(LIBGLCPP_SOURCES)
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CXX_SOURCES = \
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@ -77,6 +77,7 @@ sources = [
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'opt_structure_splitting.cpp',
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'opt_swizzle_swizzle.cpp',
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'opt_tree_grafting.cpp',
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'ralloc.c',
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's_expression.cpp',
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'strtod.c',
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]
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@ -0,0 +1,202 @@
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/*
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* Copyright © 2010 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include <assert.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdint.h>
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#include <talloc.h>
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#include "ralloc.h"
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#ifdef __GNUC__
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#define likely(x) __builtin_expect(!!(x),1)
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#define unlikely(x) __builtin_expect(!!(x),0)
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#else
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#define likely(x) !!(x)
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#define unlikely(x) !!(x)
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#endif
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void *
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ralloc_context(const void *ctx)
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{
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return talloc_new(ctx);
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}
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void *
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ralloc_size(const void *ctx, size_t size)
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{
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return talloc_size(ctx, size);
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}
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void *
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rzalloc_size(const void *ctx, size_t size)
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{
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return talloc_zero_size(ctx, size);
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}
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void *
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reralloc_size(const void *ctx, void *ptr, size_t size)
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{
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return talloc_realloc_size(ctx, ptr, size);
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}
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void *
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ralloc_array_size(const void *ctx, size_t size, unsigned count)
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{
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if (count > SIZE_MAX/size)
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return NULL;
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return talloc_array_size(ctx, size, count);
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}
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void *
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rzalloc_array_size(const void *ctx, size_t size, unsigned count)
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{
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if (count > SIZE_MAX/size)
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return NULL;
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return rzalloc_size(ctx, size * count);
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}
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void *
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reralloc_array_size(const void *ctx, void *ptr, size_t size, unsigned count)
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{
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if (count > SIZE_MAX/size)
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return false;
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return reralloc_size(ctx, ptr, size * count);
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}
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void
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ralloc_free(void *ptr)
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{
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talloc_free(ptr);
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}
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void
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ralloc_steal(const void *new_ctx, void *ptr)
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{
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talloc_steal(new_ctx, ptr);
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}
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void *
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ralloc_parent(const void *ptr)
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{
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return talloc_parent(ptr);
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}
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void *
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ralloc_autofree_context(void)
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{
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return talloc_autofree_context();
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}
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void
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ralloc_set_destructor(const void *ptr, void(*destructor)(void *))
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{
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talloc_set_destructor(ptr, (int(*)(void *)) destructor);
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}
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char *
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ralloc_strdup(const void *ctx, const char *str)
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{
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return talloc_strdup(ctx, str);
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}
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char *
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ralloc_strndup(const void *ctx, const char *str, size_t max)
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{
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return talloc_strndup(ctx, str, max);
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}
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bool
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ralloc_strcat(char **dest, const char *str)
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{
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void *ptr;
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assert(dest != NULL);
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ptr = talloc_strdup_append(*dest, str);
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if (unlikely(ptr == NULL))
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return false;
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*dest = ptr;
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return true;
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}
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bool
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ralloc_strncat(char **dest, const char *str, size_t n)
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{
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void *ptr;
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assert(dest != NULL);
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ptr = talloc_strndup_append(*dest, str, n);
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if (unlikely(ptr == NULL))
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return false;
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*dest = ptr;
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return true;
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}
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char *
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ralloc_asprintf(const void *ctx, const char *fmt, ...)
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{
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char *ptr;
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va_list args;
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va_start(args, fmt);
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ptr = ralloc_vasprintf(ctx, fmt, args);
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va_end(args);
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return ptr;
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}
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char *
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ralloc_vasprintf(const void *ctx, const char *fmt, va_list args)
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{
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return talloc_vasprintf(ctx, fmt, args);
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}
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bool
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ralloc_asprintf_append(char **str, const char *fmt, ...)
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{
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va_list args;
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va_start(args, fmt);
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return ralloc_vasprintf_append(str, fmt, args);
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va_end(args);
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}
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bool
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ralloc_vasprintf_append(char **str, const char *fmt, va_list args)
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{
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void *ptr;
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assert(str != NULL);
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ptr = talloc_vasprintf_append(*str, fmt, args);
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if (unlikely(ptr == NULL))
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return false;
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*str = ptr;
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return true;
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}
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@ -0,0 +1,338 @@
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/*
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* Copyright © 2010 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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/**
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* \file ralloc.h
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*
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* ralloc: a recursive memory allocator
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*
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* The ralloc memory allocator creates a hierarchy of allocated
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* objects. Every allocation is in reference to some parent, and
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* every allocated object can in turn be used as the parent of a
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* subsequent allocation. This allows for extremely convenient
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* discarding of an entire tree/sub-tree of allocations by calling
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* ralloc_free on any particular object to free it and all of its
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* children.
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*
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* This is currently a wrapper around talloc, but that will change.
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*/
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#ifndef RALLOC_H
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#define RALLOC_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <stddef.h>
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#include <stdarg.h>
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#include <stdbool.h>
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/**
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* \def ralloc(ctx, type)
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* Allocate a new object chained off of the given context.
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*
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* This is equivalent to:
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* \code
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* ((type *) ralloc_size(ctx, sizeof(type))
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* \endcode
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*/
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#define ralloc(ctx, type) ((type *) ralloc_size(ctx, sizeof(type)))
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/**
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* \def rzalloc(ctx, type)
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* Allocate a new object out of the given context and initialize it to zero.
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*
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* This is equivalent to:
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* \code
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* ((type *) rzalloc_size(ctx, sizeof(type))
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* \endcode
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*/
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#define rzalloc(ctx, type) ((type *) rzalloc_size(ctx, sizeof(type)))
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/**
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* Allocate a new ralloc context.
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*
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* While any ralloc'd pointer can be used as a context, sometimes it is useful
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* to simply allocate a context with no associated memory.
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*
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* It is equivalent to:
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* \code
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* ((type *) ralloc_size(ctx, 0)
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* \endcode
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*/
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void *ralloc_context(const void *ctx);
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/**
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* Allocate memory chained off of the given context.
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*
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* This is the core allocation routine which is used by all others. It
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* simply allocates storage for \p size bytes and returns the pointer,
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* similar to \c malloc.
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*/
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void *ralloc_size(const void *ctx, size_t size);
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/**
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* Allocate zero-initialized memory chained off of the given context.
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*
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* This is similar to \c calloc with a size of 1.
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*/
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void *rzalloc_size(const void *ctx, size_t size);
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/**
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* Resize a piece of ralloc-managed memory, preserving data.
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*
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* Similar to \c realloc. Unlike C89, passing 0 for \p size does not free the
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* memory. Instead, it resizes it to a 0-byte ralloc context, just like
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* calling ralloc_size(ctx, 0). This is different from talloc.
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*
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* \param ctx The context to use for new allocation. If \p ptr != NULL,
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* it must be the same as ralloc_parent(\p ptr).
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* \param ptr Pointer to the memory to be resized. May be NULL.
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* \param size The amount of memory to allocate, in bytes.
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*/
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void *reralloc_size(const void *ctx, void *ptr, size_t size);
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/// \defgroup array Array Allocators @{
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/**
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* \def ralloc_array(ctx, type, count)
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* Allocate an array of objects chained off the given context.
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*
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* Similar to \c calloc, but does not initialize the memory to zero.
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*
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* More than a convenience function, this also checks for integer overflow when
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* multiplying \c sizeof(type) and \p count. This is necessary for security.
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*
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* This is equivalent to:
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* \code
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* ((type *) ralloc_array_size(ctx, sizeof(type), count)
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* \endcode
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*/
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#define ralloc_array(ctx, type, count) \
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((type *) ralloc_array_size(ctx, sizeof(type), count))
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/**
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* \def rzalloc_array(ctx, type, count)
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* Allocate a zero-initialized array chained off the given context.
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*
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* Similar to \c calloc.
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*
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* More than a convenience function, this also checks for integer overflow when
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* multiplying \c sizeof(type) and \p count. This is necessary for security.
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*
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* This is equivalent to:
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* \code
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* ((type *) rzalloc_array_size(ctx, sizeof(type), count)
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* \endcode
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*/
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#define rzalloc_array(ctx, type, count) \
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((type *) rzalloc_array_size(ctx, sizeof(type), count))
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/**
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* \def reralloc(ctx, ptr, type, count)
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* Resize a ralloc-managed array, preserving data.
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*
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* Similar to \c realloc. Unlike C89, passing 0 for \p size does not free the
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* memory. Instead, it resizes it to a 0-byte ralloc context, just like
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* calling ralloc_size(ctx, 0). This is different from talloc.
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*
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* More than a convenience function, this also checks for integer overflow when
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* multiplying \c sizeof(type) and \p count. This is necessary for security.
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*
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* \param ctx The context to use for new allocation. If \p ptr != NULL,
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* it must be the same as ralloc_parent(\p ptr).
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* \param ptr Pointer to the array to be resized. May be NULL.
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* \param type The element type.
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* \param count The number of elements to allocate.
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*/
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#define reralloc(ctx, ptr, type, count) \
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((type *) reralloc_array_size(ctx, ptr, sizeof(type), count))
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/**
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* Allocate memory for an array chained off the given context.
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*
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* Similar to \c calloc, but does not initialize the memory to zero.
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*
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* More than a convenience function, this also checks for integer overflow when
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* multiplying \p size and \p count. This is necessary for security.
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*/
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void *ralloc_array_size(const void *ctx, size_t size, unsigned count);
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/**
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* Allocate a zero-initialized array chained off the given context.
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*
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* Similar to \c calloc.
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*
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* More than a convenience function, this also checks for integer overflow when
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* multiplying \p size and \p count. This is necessary for security.
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*/
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void *rzalloc_array_size(const void *ctx, size_t size, unsigned count);
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/**
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* Resize a ralloc-managed array, preserving data.
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*
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* Similar to \c realloc. Unlike C89, passing 0 for \p size does not free the
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* memory. Instead, it resizes it to a 0-byte ralloc context, just like
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* calling ralloc_size(ctx, 0). This is different from talloc.
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*
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* More than a convenience function, this also checks for integer overflow when
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* multiplying \c sizeof(type) and \p count. This is necessary for security.
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*
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* \param ctx The context to use for new allocation. If \p ptr != NULL,
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* it must be the same as ralloc_parent(\p ptr).
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* \param ptr Pointer to the array to be resized. May be NULL.
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* \param size The size of an individual element.
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* \param count The number of elements to allocate.
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*
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* \return True unless allocation failed.
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*/
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void *reralloc_array_size(const void *ctx, void *ptr, size_t size,
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unsigned count);
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/// @}
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/**
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* Free a piece of ralloc-managed memory.
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*
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* This will also free the memory of any children allocated this context.
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*/
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void ralloc_free(void *ptr);
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/**
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* "Steal" memory from one context, changing it to another.
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*
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* This changes \p ptr's context to \p new_ctx. This is quite useful if
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* memory is allocated out of a temporary context.
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*/
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void ralloc_steal(const void *new_ctx, void *ptr);
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/**
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* Return the given pointer's ralloc context.
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*/
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void *ralloc_parent(const void *ptr);
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/**
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* Return a context whose memory will be automatically freed at program exit.
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*
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* The first call to this function creates a context and registers a handler
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* to free it using \c atexit. This may cause trouble if used in a library
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* loaded with \c dlopen.
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*/
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void *ralloc_autofree_context(void);
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/**
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* Set a callback to occur just before an object is freed.
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*/
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void ralloc_set_destructor(const void *ptr, void(*destructor)(void *));
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/// \defgroup array String Functions @{
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/**
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* Duplicate a string, allocating the memory from the given context.
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*/
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char *ralloc_strdup(const void *ctx, const char *str);
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/**
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* Duplicate a string, allocating the memory from the given context.
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*
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* Like \c strndup, at most \p n characters are copied. If \p str is longer
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* than \p n characters, \p n are copied, and a termining \c '\0' byte is added.
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*/
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char *ralloc_strndup(const void *ctx, const char *str, size_t n);
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/**
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* Concatenate two strings, allocating the necessary space.
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*
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* This appends \p str to \p *dest, similar to \c strcat, using ralloc_resize
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* to expand \p *dest to the appropriate size. \p dest will be updated to the
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* new pointer unless allocation fails.
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*
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* The result will always be null-terminated.
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*
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* \return True unless allocation failed.
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*/
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bool ralloc_strcat(char **dest, const char *str);
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/**
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* Concatenate two strings, allocating the necessary space.
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*
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* This appends at most \p n bytes of \p str to \p *dest, using ralloc_resize
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* to expand \p *dest to the appropriate size. \p dest will be updated to the
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* new pointer unless allocation fails.
|
||||
*
|
||||
* The result will always be null-terminated; \p str does not need to be null
|
||||
* terminated if it is longer than \p n.
|
||||
*
|
||||
* \return True unless allocation failed.
|
||||
*/
|
||||
bool ralloc_strncat(char **dest, const char *str, size_t n);
|
||||
|
||||
/**
|
||||
* Print to a string.
|
||||
*
|
||||
* This is analogous to \c sprintf, but allocates enough space (using \p ctx
|
||||
* as the context) for the resulting string.
|
||||
*
|
||||
* \return The newly allocated string.
|
||||
*/
|
||||
char *ralloc_asprintf (const void *ctx, const char *fmt, ...);
|
||||
|
||||
/**
|
||||
* Print to a string, given a va_list.
|
||||
*
|
||||
* This is analogous to \c vsprintf, but allocates enough space (using \p ctx
|
||||
* as the context) for the resulting string.
|
||||
*
|
||||
* \return The newly allocated string.
|
||||
*/
|
||||
char *ralloc_vasprintf(const void *ctx, const char *fmt, va_list args);
|
||||
|
||||
/**
|
||||
* Append formatted text to the supplied string.
|
||||
*
|
||||
* \sa ralloc_asprintf
|
||||
* \sa ralloc_strcat
|
||||
*
|
||||
* \p str will be updated to the new pointer unless allocation fails.
|
||||
*
|
||||
* \return True unless allocation failed.
|
||||
*/
|
||||
bool ralloc_asprintf_append (char **str, const char *fmt, ...);
|
||||
|
||||
/**
|
||||
* Append formatted text to the supplied string, given a va_list.
|
||||
*
|
||||
* \sa ralloc_vasprintf
|
||||
* \sa ralloc_strcat
|
||||
*
|
||||
* \p str will be updated to the new pointer unless allocation fails.
|
||||
*
|
||||
* \return True unless allocation failed.
|
||||
*/
|
||||
bool ralloc_vasprintf_append(char **str, const char *fmt, va_list args);
|
||||
/// @}
|
||||
|
||||
#ifdef __cplusplus
|
||||
} /* end of extern "C" */
|
||||
#endif
|
||||
|
||||
#endif
|
Loading…
Reference in New Issue