4 * Copyright 2016 Microsoft
6 * Licensed under the MIT license. See LICENSE file in the project root for full license information.
12 #include "mono/metadata/dynamic-stream-internals.h"
13 #include "mono/metadata/metadata-internals.h"
14 #include "mono/utils/checked-build.h"
15 #include "mono/utils/mono-error-internals.h"
18 mono_dynstream_init (MonoDynamicStream *sh)
20 MONO_REQ_GC_NEUTRAL_MODE;
23 sh->alloc_size = 4096;
24 sh->data = (char *)g_malloc (4096);
25 sh->hash = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL);
26 mono_dynstream_insert_string (sh, "");
30 make_room_in_stream (MonoDynamicStream *stream, int size)
32 MONO_REQ_GC_NEUTRAL_MODE;
34 if (size <= stream->alloc_size)
37 while (stream->alloc_size <= size) {
38 if (stream->alloc_size < 4096)
39 stream->alloc_size = 4096;
41 stream->alloc_size *= 2;
44 stream->data = (char *)g_realloc (stream->data, stream->alloc_size);
48 mono_dynstream_insert_string (MonoDynamicStream *sh, const char *str)
50 MONO_REQ_GC_NEUTRAL_MODE;
54 gpointer oldkey, oldval;
56 if (g_hash_table_lookup_extended (sh->hash, str, &oldkey, &oldval))
57 return GPOINTER_TO_UINT (oldval);
59 len = strlen (str) + 1;
62 make_room_in_stream (sh, idx + len);
65 * We strdup the string even if we already copy them in sh->data
66 * so that the string pointers in the hash remain valid even if
67 * we need to realloc sh->data. We may want to avoid that later.
69 g_hash_table_insert (sh->hash, g_strdup (str), GUINT_TO_POINTER (idx));
70 memcpy (sh->data + idx, str, len);
76 mono_dynstream_insert_mstring (MonoDynamicStream *sh, MonoString *str, MonoError *error)
78 MONO_REQ_GC_UNSAFE_MODE;
81 char *name = mono_string_to_utf8_checked (str, error);
82 return_val_if_nok (error, -1);
84 idx = mono_dynstream_insert_string (sh, name);
90 mono_dynstream_add_data (MonoDynamicStream *stream, const char *data, guint32 len)
92 MONO_REQ_GC_NEUTRAL_MODE;
96 make_room_in_stream (stream, stream->index + len);
97 memcpy (stream->data + stream->index, data, len);
101 * align index? Not without adding an additional param that controls it since
102 * we may store a blob value in pieces.
108 mono_dynstream_add_zero (MonoDynamicStream *stream, guint32 len)
110 MONO_REQ_GC_NEUTRAL_MODE;
114 make_room_in_stream (stream, stream->index + len);
115 memset (stream->data + stream->index, 0, len);
117 stream->index += len;
122 mono_dynstream_data_align (MonoDynamicStream *stream)
124 MONO_REQ_GC_NEUTRAL_MODE;
126 guint32 count = stream->index % 4;
128 /* we assume the stream data will be aligned */
130 mono_dynstream_add_zero (stream, 4 - count);