author | prr |
Mon, 23 Nov 2015 09:58:44 -0800 | |
changeset 34414 | e496a8d8fc8a |
child 40435 | 553eb1a50733 |
permissions | -rw-r--r-- |
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/* |
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* Copyright © 2009 Red Hat, Inc. |
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* |
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* This is part of HarfBuzz, a text shaping library. |
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* |
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* Permission is hereby granted, without written agreement and without |
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* license or royalty fees, to use, copy, modify, and distribute this |
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* software and its documentation for any purpose, provided that the |
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* above copyright notice and the following two paragraphs appear in |
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* all copies of this software. |
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* |
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR |
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES |
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN |
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH |
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* DAMAGE. |
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* |
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, |
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND |
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS |
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO |
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. |
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* |
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* Red Hat Author(s): Behdad Esfahbod |
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*/ |
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|
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/* http://www.oracle.com/technetwork/articles/servers-storage-dev/standardheaderfiles-453865.html */ |
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#ifndef _POSIX_C_SOURCE |
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#define _POSIX_C_SOURCE 199309L |
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#endif |
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#include "hb-private.hh" |
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#include "hb-object-private.hh" |
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#ifdef HAVE_SYS_MMAN_H |
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#ifdef HAVE_UNISTD_H |
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#include <unistd.h> |
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#endif /* HAVE_UNISTD_H */ |
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#include <sys/mman.h> |
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#endif /* HAVE_SYS_MMAN_H */ |
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#include <stdio.h> |
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#include <errno.h> |
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#ifndef HB_DEBUG_BLOB |
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#define HB_DEBUG_BLOB (HB_DEBUG+0) |
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#endif |
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struct hb_blob_t { |
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hb_object_header_t header; |
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ASSERT_POD (); |
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bool immutable; |
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const char *data; |
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unsigned int length; |
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hb_memory_mode_t mode; |
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void *user_data; |
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hb_destroy_func_t destroy; |
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}; |
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static bool _try_writable (hb_blob_t *blob); |
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static void |
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_hb_blob_destroy_user_data (hb_blob_t *blob) |
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{ |
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if (blob->destroy) { |
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blob->destroy (blob->user_data); |
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blob->user_data = NULL; |
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blob->destroy = NULL; |
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} |
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} |
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/** |
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* hb_blob_create: (skip) |
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* @data: Pointer to blob data. |
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* @length: Length of @data in bytes. |
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* @mode: Memory mode for @data. |
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* @user_data: Data parameter to pass to @destroy. |
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* @destroy: Callback to call when @data is not needed anymore. |
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* |
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* Creates a new "blob" object wrapping @data. The @mode parameter is used |
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* to negotiate ownership and lifecycle of @data. |
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* |
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* Return value: New blob, or the empty blob if something failed or if @length is |
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* zero. Destroy with hb_blob_destroy(). |
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* |
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* Since: 0.9.2 |
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**/ |
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hb_blob_t * |
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hb_blob_create (const char *data, |
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unsigned int length, |
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hb_memory_mode_t mode, |
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void *user_data, |
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hb_destroy_func_t destroy) |
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{ |
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hb_blob_t *blob; |
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if (!length || |
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length >= 1u << 31 || |
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data + length < data /* overflows */ || |
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!(blob = hb_object_create<hb_blob_t> ())) { |
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if (destroy) |
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destroy (user_data); |
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return hb_blob_get_empty (); |
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} |
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blob->data = data; |
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blob->length = length; |
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blob->mode = mode; |
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blob->user_data = user_data; |
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blob->destroy = destroy; |
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if (blob->mode == HB_MEMORY_MODE_DUPLICATE) { |
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blob->mode = HB_MEMORY_MODE_READONLY; |
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if (!_try_writable (blob)) { |
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hb_blob_destroy (blob); |
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return hb_blob_get_empty (); |
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} |
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} |
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|
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return blob; |
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} |
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131 |
|
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132 |
/** |
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* hb_blob_create_sub_blob: |
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* @parent: Parent blob. |
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* @offset: Start offset of sub-blob within @parent, in bytes. |
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* @length: Length of sub-blob. |
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* |
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* Returns a blob that represents a range of bytes in @parent. The new |
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* blob is always created with %HB_MEMORY_MODE_READONLY, meaning that it |
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* will never modify data in the parent blob. The parent data is not |
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* expected to be modified, and will result in undefined behavior if it |
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* is. |
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143 |
* |
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* Makes @parent immutable. |
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145 |
* |
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* Return value: New blob, or the empty blob if something failed or if |
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* @length is zero or @offset is beyond the end of @parent's data. Destroy |
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* with hb_blob_destroy(). |
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149 |
* |
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* Since: 0.9.2 |
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151 |
**/ |
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152 |
hb_blob_t * |
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153 |
hb_blob_create_sub_blob (hb_blob_t *parent, |
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unsigned int offset, |
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unsigned int length) |
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156 |
{ |
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hb_blob_t *blob; |
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158 |
|
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if (!length || offset >= parent->length) |
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return hb_blob_get_empty (); |
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161 |
|
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162 |
hb_blob_make_immutable (parent); |
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163 |
|
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blob = hb_blob_create (parent->data + offset, |
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MIN (length, parent->length - offset), |
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HB_MEMORY_MODE_READONLY, |
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hb_blob_reference (parent), |
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(hb_destroy_func_t) hb_blob_destroy); |
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169 |
|
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return blob; |
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171 |
} |
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172 |
|
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173 |
/** |
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174 |
* hb_blob_get_empty: |
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175 |
* |
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176 |
* Returns the singleton empty blob. |
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177 |
* |
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* See TODO:link object types for more information. |
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179 |
* |
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* Return value: (transfer full): the empty blob. |
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181 |
* |
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182 |
* Since: 0.9.2 |
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183 |
**/ |
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184 |
hb_blob_t * |
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185 |
hb_blob_get_empty (void) |
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186 |
{ |
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187 |
static const hb_blob_t _hb_blob_nil = { |
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188 |
HB_OBJECT_HEADER_STATIC, |
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189 |
|
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true, /* immutable */ |
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191 |
|
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192 |
NULL, /* data */ |
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193 |
0, /* length */ |
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194 |
HB_MEMORY_MODE_READONLY, /* mode */ |
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195 |
|
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196 |
NULL, /* user_data */ |
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197 |
NULL /* destroy */ |
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198 |
}; |
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199 |
|
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200 |
return const_cast<hb_blob_t *> (&_hb_blob_nil); |
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201 |
} |
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202 |
|
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203 |
/** |
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204 |
* hb_blob_reference: (skip) |
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205 |
* @blob: a blob. |
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206 |
* |
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207 |
* Increases the reference count on @blob. |
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208 |
* |
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209 |
* See TODO:link object types for more information. |
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210 |
* |
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211 |
* Return value: @blob. |
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212 |
* |
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213 |
* Since: 0.9.2 |
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214 |
**/ |
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215 |
hb_blob_t * |
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216 |
hb_blob_reference (hb_blob_t *blob) |
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217 |
{ |
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return hb_object_reference (blob); |
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219 |
} |
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220 |
|
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221 |
/** |
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222 |
* hb_blob_destroy: (skip) |
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223 |
* @blob: a blob. |
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224 |
* |
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225 |
* Descreases the reference count on @blob, and if it reaches zero, destroys |
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226 |
* @blob, freeing all memory, possibly calling the destroy-callback the blob |
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* was created for if it has not been called already. |
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228 |
* |
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* See TODO:link object types for more information. |
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230 |
* |
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231 |
* Since: 0.9.2 |
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232 |
**/ |
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233 |
void |
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234 |
hb_blob_destroy (hb_blob_t *blob) |
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235 |
{ |
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236 |
if (!hb_object_destroy (blob)) return; |
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237 |
|
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238 |
_hb_blob_destroy_user_data (blob); |
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239 |
|
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240 |
free (blob); |
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241 |
} |
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242 |
|
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243 |
/** |
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244 |
* hb_blob_set_user_data: (skip) |
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245 |
* @blob: a blob. |
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* @key: key for data to set. |
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247 |
* @data: data to set. |
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248 |
* @destroy: callback to call when @data is not needed anymore. |
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* @replace: whether to replace an existing data with the same key. |
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250 |
* |
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251 |
* Return value: |
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252 |
* |
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253 |
* Since: 0.9.2 |
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254 |
**/ |
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255 |
hb_bool_t |
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256 |
hb_blob_set_user_data (hb_blob_t *blob, |
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257 |
hb_user_data_key_t *key, |
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258 |
void * data, |
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259 |
hb_destroy_func_t destroy, |
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260 |
hb_bool_t replace) |
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261 |
{ |
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return hb_object_set_user_data (blob, key, data, destroy, replace); |
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263 |
} |
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264 |
|
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265 |
/** |
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266 |
* hb_blob_get_user_data: (skip) |
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267 |
* @blob: a blob. |
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268 |
* @key: key for data to get. |
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269 |
* |
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270 |
* |
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271 |
* |
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272 |
* Return value: (transfer none): |
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273 |
* |
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274 |
* Since: 0.9.2 |
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275 |
**/ |
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276 |
void * |
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277 |
hb_blob_get_user_data (hb_blob_t *blob, |
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278 |
hb_user_data_key_t *key) |
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279 |
{ |
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return hb_object_get_user_data (blob, key); |
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281 |
} |
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282 |
|
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283 |
|
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284 |
/** |
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285 |
* hb_blob_make_immutable: |
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|
286 |
* @blob: a blob. |
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|
287 |
* |
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|
288 |
* |
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289 |
* |
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290 |
* Since: 0.9.2 |
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291 |
**/ |
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292 |
void |
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293 |
hb_blob_make_immutable (hb_blob_t *blob) |
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294 |
{ |
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295 |
if (hb_object_is_inert (blob)) |
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296 |
return; |
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|
297 |
|
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298 |
blob->immutable = true; |
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299 |
} |
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300 |
|
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301 |
/** |
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302 |
* hb_blob_is_immutable: |
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303 |
* @blob: a blob. |
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|
304 |
* |
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|
305 |
* |
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|
306 |
* |
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|
307 |
* Return value: TODO |
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|
308 |
* |
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|
309 |
* Since: 0.9.2 |
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|
310 |
**/ |
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|
311 |
hb_bool_t |
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312 |
hb_blob_is_immutable (hb_blob_t *blob) |
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|
313 |
{ |
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|
314 |
return blob->immutable; |
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|
315 |
} |
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|
316 |
|
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|
317 |
|
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|
318 |
/** |
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|
319 |
* hb_blob_get_length: |
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|
320 |
* @blob: a blob. |
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|
321 |
* |
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|
322 |
* |
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|
323 |
* |
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|
324 |
* Return value: the length of blob data in bytes. |
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|
325 |
* |
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|
326 |
* Since: 0.9.2 |
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|
327 |
**/ |
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|
328 |
unsigned int |
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|
329 |
hb_blob_get_length (hb_blob_t *blob) |
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|
330 |
{ |
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|
331 |
return blob->length; |
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|
332 |
} |
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|
333 |
|
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|
334 |
/** |
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|
335 |
* hb_blob_get_data: |
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|
336 |
* @blob: a blob. |
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|
337 |
* @length: (out): |
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|
338 |
* |
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changeset
|
339 |
* |
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|
340 |
* |
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|
341 |
* Returns: (transfer none) (array length=length): |
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|
342 |
* |
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|
343 |
* Since: 0.9.2 |
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|
344 |
**/ |
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|
345 |
const char * |
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|
346 |
hb_blob_get_data (hb_blob_t *blob, unsigned int *length) |
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|
347 |
{ |
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|
348 |
if (length) |
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|
349 |
*length = blob->length; |
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changeset
|
350 |
|
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|
351 |
return blob->data; |
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changeset
|
352 |
} |
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changeset
|
353 |
|
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|
354 |
/** |
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|
355 |
* hb_blob_get_data_writable: |
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|
356 |
* @blob: a blob. |
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|
357 |
* @length: (out): output length of the writable data. |
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|
358 |
* |
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|
359 |
* Tries to make blob data writable (possibly copying it) and |
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|
360 |
* return pointer to data. |
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changeset
|
361 |
* |
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|
362 |
* Fails if blob has been made immutable, or if memory allocation |
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changeset
|
363 |
* fails. |
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diff
changeset
|
364 |
* |
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changeset
|
365 |
* Returns: (transfer none) (array length=length): Writable blob data, |
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|
366 |
* or %NULL if failed. |
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changeset
|
367 |
* |
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changeset
|
368 |
* Since: 0.9.2 |
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changeset
|
369 |
**/ |
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|
370 |
char * |
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|
371 |
hb_blob_get_data_writable (hb_blob_t *blob, unsigned int *length) |
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|
372 |
{ |
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|
373 |
if (!_try_writable (blob)) { |
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|
374 |
if (length) |
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|
375 |
*length = 0; |
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changeset
|
376 |
|
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|
377 |
return NULL; |
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parents:
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changeset
|
378 |
} |
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changeset
|
379 |
|
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changeset
|
380 |
if (length) |
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changeset
|
381 |
*length = blob->length; |
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changeset
|
382 |
|
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changeset
|
383 |
return const_cast<char *> (blob->data); |
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parents:
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changeset
|
384 |
} |
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parents:
diff
changeset
|
385 |
|
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prr
parents:
diff
changeset
|
386 |
|
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parents:
diff
changeset
|
387 |
static hb_bool_t |
e496a8d8fc8a
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prr
parents:
diff
changeset
|
388 |
_try_make_writable_inplace_unix (hb_blob_t *blob) |
e496a8d8fc8a
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prr
parents:
diff
changeset
|
389 |
{ |
e496a8d8fc8a
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prr
parents:
diff
changeset
|
390 |
#if defined(HAVE_SYS_MMAN_H) && defined(HAVE_MPROTECT) |
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prr
parents:
diff
changeset
|
391 |
uintptr_t pagesize = -1, mask, length; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
392 |
const char *addr; |
e496a8d8fc8a
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prr
parents:
diff
changeset
|
393 |
|
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
394 |
#if defined(HAVE_SYSCONF) && defined(_SC_PAGE_SIZE) |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
395 |
pagesize = (uintptr_t) sysconf (_SC_PAGE_SIZE); |
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8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
396 |
#elif defined(HAVE_SYSCONF) && defined(_SC_PAGESIZE) |
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8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
397 |
pagesize = (uintptr_t) sysconf (_SC_PAGESIZE); |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
398 |
#elif defined(HAVE_GETPAGESIZE) |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
399 |
pagesize = (uintptr_t) getpagesize (); |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
400 |
#endif |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
401 |
|
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
402 |
if ((uintptr_t) -1L == pagesize) { |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
403 |
DEBUG_MSG_FUNC (BLOB, blob, "failed to get pagesize: %s", strerror (errno)); |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
404 |
return false; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
405 |
} |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
406 |
DEBUG_MSG_FUNC (BLOB, blob, "pagesize is %lu", (unsigned long) pagesize); |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
407 |
|
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
408 |
mask = ~(pagesize-1); |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
409 |
addr = (const char *) (((uintptr_t) blob->data) & mask); |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
410 |
length = (const char *) (((uintptr_t) blob->data + blob->length + pagesize-1) & mask) - addr; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
411 |
DEBUG_MSG_FUNC (BLOB, blob, |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
412 |
"calling mprotect on [%p..%p] (%lu bytes)", |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
413 |
addr, addr+length, (unsigned long) length); |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
414 |
if (-1 == mprotect ((void *) addr, length, PROT_READ | PROT_WRITE)) { |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
415 |
DEBUG_MSG_FUNC (BLOB, blob, "mprotect failed: %s", strerror (errno)); |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
416 |
return false; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
417 |
} |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
418 |
|
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
419 |
blob->mode = HB_MEMORY_MODE_WRITABLE; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
420 |
|
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
421 |
DEBUG_MSG_FUNC (BLOB, blob, |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
422 |
"successfully made [%p..%p] (%lu bytes) writable\n", |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
423 |
addr, addr+length, (unsigned long) length); |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
424 |
return true; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
425 |
#else |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
426 |
return false; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
427 |
#endif |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
428 |
} |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
429 |
|
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
430 |
static bool |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
431 |
_try_writable_inplace (hb_blob_t *blob) |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
432 |
{ |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
433 |
DEBUG_MSG_FUNC (BLOB, blob, "making writable inplace\n"); |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
434 |
|
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
435 |
if (_try_make_writable_inplace_unix (blob)) |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
436 |
return true; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
437 |
|
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
438 |
DEBUG_MSG_FUNC (BLOB, blob, "making writable -> FAILED\n"); |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
439 |
|
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
440 |
/* Failed to make writable inplace, mark that */ |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
441 |
blob->mode = HB_MEMORY_MODE_READONLY; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
442 |
return false; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
443 |
} |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
444 |
|
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
445 |
static bool |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
446 |
_try_writable (hb_blob_t *blob) |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
447 |
{ |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
448 |
if (blob->immutable) |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
449 |
return false; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
450 |
|
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
451 |
if (blob->mode == HB_MEMORY_MODE_WRITABLE) |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
452 |
return true; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
453 |
|
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
454 |
if (blob->mode == HB_MEMORY_MODE_READONLY_MAY_MAKE_WRITABLE && _try_writable_inplace (blob)) |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
455 |
return true; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
456 |
|
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
457 |
if (blob->mode == HB_MEMORY_MODE_WRITABLE) |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
458 |
return true; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
459 |
|
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
460 |
|
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
461 |
DEBUG_MSG_FUNC (BLOB, blob, "current data is -> %p\n", blob->data); |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
462 |
|
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
463 |
char *new_data; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
464 |
|
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
465 |
new_data = (char *) malloc (blob->length); |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
466 |
if (unlikely (!new_data)) |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
467 |
return false; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
468 |
|
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
469 |
DEBUG_MSG_FUNC (BLOB, blob, "dupped successfully -> %p\n", blob->data); |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
470 |
|
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
471 |
memcpy (new_data, blob->data, blob->length); |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
472 |
_hb_blob_destroy_user_data (blob); |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
473 |
blob->mode = HB_MEMORY_MODE_WRITABLE; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
474 |
blob->data = new_data; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
475 |
blob->user_data = new_data; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
476 |
blob->destroy = free; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
477 |
|
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
478 |
return true; |
e496a8d8fc8a
8143177: Integrate harfbuzz opentype layout engine per JEP 258
prr
parents:
diff
changeset
|
479 |
} |