dep: Add Zydis

dep/zydis/src/FormatterBuffer.c

@@ -0,0 +1,191 @@
+/***************************************************************************************************
+
+  Zyan Disassembler Library (Zydis)
+
+  Original Author : Florian Bernd
+
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+
+***************************************************************************************************/
+
+#include <Zydis/Internal/String.h>
+#include <Zydis/FormatterBuffer.h>
+
+/* ============================================================================================== */
+/* Exported functions                                                                             */
+/* ============================================================================================== */
+
+/* ---------------------------------------------------------------------------------------------- */
+/* Token                                                                                          */
+/* ---------------------------------------------------------------------------------------------- */
+
+ZyanStatus ZydisFormatterTokenGetValue(const ZydisFormatterToken* token,
+    ZydisTokenType* type, ZyanConstCharPointer* value)
+{
+    if (!token || !type || !value)
+    {
+        return ZYAN_STATUS_INVALID_ARGUMENT;
+    }
+
+    *type = token->type;
+    *value = (ZyanConstCharPointer)((ZyanU8*)token + sizeof(ZydisFormatterToken));
+
+    return ZYAN_STATUS_SUCCESS;
+}
+
+ZyanStatus ZydisFormatterTokenNext(ZydisFormatterTokenConst** token)
+{
+    if (!token || !*token)
+    {
+        return ZYAN_STATUS_INVALID_ARGUMENT;
+    }
+
+    const ZyanU8 next = (*token)->next;
+    if (!next)
+    {
+        return ZYAN_STATUS_OUT_OF_RANGE;
+    }
+    *token = (ZydisFormatterTokenConst*)((ZyanU8*)*token + sizeof(ZydisFormatterToken) + next);
+
+    return ZYAN_STATUS_SUCCESS;
+}
+
+/* ---------------------------------------------------------------------------------------------- */
+/* Buffer                                                                                         */
+/* ---------------------------------------------------------------------------------------------- */
+
+ZyanStatus ZydisFormatterBufferGetToken(const ZydisFormatterBuffer* buffer,
+    ZydisFormatterTokenConst** token)
+{
+    if (!buffer || !token)
+    {
+        return ZYAN_STATUS_INVALID_ARGUMENT;
+    }
+
+    *token = ((ZydisFormatterTokenConst*)buffer->string.vector.data - 1);
+    if ((*token)->type == ZYDIS_TOKEN_INVALID)
+    {
+        return ZYAN_STATUS_INVALID_OPERATION;
+    }
+
+    return ZYAN_STATUS_SUCCESS;
+}
+
+ZyanStatus ZydisFormatterBufferGetString(ZydisFormatterBuffer* buffer, ZyanString** string)
+{
+    if (!buffer || !string)
+    {
+        return ZYAN_STATUS_INVALID_ARGUMENT;
+    }
+
+    if (buffer->is_token_list &&
+        ((ZydisFormatterTokenConst*)buffer->string.vector.data - 1)->type == ZYDIS_TOKEN_INVALID)
+    {
+        return ZYAN_STATUS_INVALID_OPERATION;
+    }
+
+    ZYAN_ASSERT(buffer->string.vector.data);
+    ZYAN_ASSERT(buffer->string.vector.size);
+
+    *string = &buffer->string;
+
+    return ZYAN_STATUS_SUCCESS;
+}
+
+ZyanStatus ZydisFormatterBufferAppend(ZydisFormatterBuffer* buffer, ZydisTokenType type)
+{
+    if (!buffer)
+    {
+        return ZYAN_STATUS_INVALID_ARGUMENT;
+    }
+
+    if (!buffer->is_token_list)
+    {
+        return ZYAN_STATUS_SUCCESS;
+    }
+
+    const ZyanUSize len = buffer->string.vector.size;
+    ZYAN_ASSERT((len > 0) && (len < 256));
+    if (buffer->capacity <= len + sizeof(ZydisFormatterToken))
+    {
+        return ZYAN_STATUS_INSUFFICIENT_BUFFER_SIZE;
+    }
+
+    ZydisFormatterToken* const last  = (ZydisFormatterToken*)buffer->string.vector.data - 1;
+    last->next = (ZyanU8)len;
+
+    const ZyanUSize delta = len + sizeof(ZydisFormatterToken);
+    buffer->capacity -= delta;
+    buffer->string.vector.data = (ZyanU8*)buffer->string.vector.data + delta;
+    buffer->string.vector.size = 1;
+    buffer->string.vector.capacity = ZYAN_MIN(buffer->capacity, 255);
+    *(char*)buffer->string.vector.data = '\0';
+
+    ZydisFormatterToken* const token = (ZydisFormatterToken*)buffer->string.vector.data - 1;
+    token->type = type;
+    token->next = 0;
+
+    return ZYAN_STATUS_SUCCESS;
+}
+
+ZyanStatus ZydisFormatterBufferRemember(const ZydisFormatterBuffer* buffer, ZyanUPointer* state)
+{
+    if (!buffer || !state)
+    {
+        return ZYAN_STATUS_INVALID_ARGUMENT;
+    }
+
+    if (buffer->is_token_list)
+    {
+        *state = (ZyanUPointer)buffer->string.vector.data;
+    } else
+    {
+        *state = (ZyanUPointer)buffer->string.vector.size;
+    }
+
+    return ZYAN_STATUS_SUCCESS;
+}
+
+ZyanStatus ZydisFormatterBufferRestore(ZydisFormatterBuffer* buffer, ZyanUPointer state)
+{
+    if (!buffer)
+    {
+        return ZYAN_STATUS_INVALID_ARGUMENT;
+    }
+
+    if (buffer->is_token_list)
+    {
+        const ZyanUSize delta = (ZyanUPointer)buffer->string.vector.data - state;
+        buffer->capacity += delta;
+        buffer->string.vector.data = (void*)state;
+        buffer->string.vector.size = 1; // TODO: Restore size?
+        buffer->string.vector.capacity = ZYAN_MIN(buffer->capacity, 255);
+        *(char*)buffer->string.vector.data = '\0';
+    } else
+    {
+        buffer->string.vector.size = (ZyanUSize)state;
+        ZYDIS_STRING_NULLTERMINATE(&buffer->string);
+    }
+
+    return ZYAN_STATUS_SUCCESS;
+}
+
+/* ---------------------------------------------------------------------------------------------- */
+
+/* ============================================================================================== */