26  * DESCRIPTION: Copy a buffer object to another buffer object.
34 	u8 *buffer;  in acpi_ex_store_buffer_to_buffer()  local
44 	/* We know that source_desc is a buffer by now */  in acpi_ex_store_buffer_to_buffer()
46 	buffer = ACPI_CAST_PTR(u8, source_desc->buffer.pointer);  in acpi_ex_store_buffer_to_buffer()
47 	length = source_desc->buffer.length;  in acpi_ex_store_buffer_to_buffer()
50 	 * If target is a buffer of length zero or is a static buffer,  in acpi_ex_store_buffer_to_buffer()
51 	 * allocate a new buffer of the proper length  in acpi_ex_store_buffer_to_buffer()
53 	if ((target_desc->buffer.length == 0) ||  in acpi_ex_store_buffer_to_buffer()
55 		target_desc->buffer.pointer = ACPI_ALLOCATE(length);  in acpi_ex_store_buffer_to_buffer()
56 		if (!target_desc->buffer.pointer) {  in acpi_ex_store_buffer_to_buffer()
60 		target_desc->buffer.length = length;  in acpi_ex_store_buffer_to_buffer()
63 	/* Copy source buffer to target buffer */  in acpi_ex_store_buffer_to_buffer()
65 	if (length <= target_desc->buffer.length) {  in acpi_ex_store_buffer_to_buffer()
67 		/* Clear existing buffer and copy in the new one */  in acpi_ex_store_buffer_to_buffer()
69 		memset(target_desc->buffer.pointer, 0,  in acpi_ex_store_buffer_to_buffer()
70 		       target_desc->buffer.length);  in acpi_ex_store_buffer_to_buffer()
71 		memcpy(target_desc->buffer.pointer, buffer, length);  in acpi_ex_store_buffer_to_buffer()
75 		 * NOTE: ACPI versions up to 3.0 specified that the buffer must be  in acpi_ex_store_buffer_to_buffer()
76 		 * truncated if the string is smaller than the buffer. However, "other"  in acpi_ex_store_buffer_to_buffer()
78 		 * standard. ACPI 3.0A changes this behavior such that the buffer  in acpi_ex_store_buffer_to_buffer()
84 		 * If the original source was a string, we must truncate the buffer,  in acpi_ex_store_buffer_to_buffer()
85 		 * according to the ACPI spec. Integer-to-Buffer and Buffer-to-Buffer  in acpi_ex_store_buffer_to_buffer()
86 		 * copy must not truncate the original buffer.  in acpi_ex_store_buffer_to_buffer()
92 			target_desc->buffer.length = length;  in acpi_ex_store_buffer_to_buffer()
98 		memcpy(target_desc->buffer.pointer, buffer,  in acpi_ex_store_buffer_to_buffer()
99 		       target_desc->buffer.length);  in acpi_ex_store_buffer_to_buffer()
102 				  "Truncating source buffer from %X to %X\n",  in acpi_ex_store_buffer_to_buffer()
103 				  length, target_desc->buffer.length));  in acpi_ex_store_buffer_to_buffer()
108 	target_desc->buffer.flags = source_desc->buffer.flags;  in acpi_ex_store_buffer_to_buffer()
131 	u8 *buffer;  in acpi_ex_store_string_to_string()  local
143 	buffer = ACPI_CAST_PTR(u8, source_desc->string.pointer);  in acpi_ex_store_string_to_string()
153 		 * String will fit in existing non-static buffer.  in acpi_ex_store_string_to_string()
158 		memcpy(target_desc->string.pointer, buffer, length);  in acpi_ex_store_string_to_string()
161 		 * Free the current buffer, then allocate a new buffer  in acpi_ex_store_string_to_string()
180 		memcpy(target_desc->string.pointer, buffer, length);  in acpi_ex_store_string_to_string()