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test_memio_move_message: add docs

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Juliusz Sosinowicz
2025-10-08 16:20:39 +02:00
parent 13f8f66281
commit 8233d0d8a2
1 changed files with 23 additions and 0 deletions
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23
tests/utils.c
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@@ -461,6 +461,7 @@ int test_memio_move_message(struct test_memio_ctx *ctx, int client,
int total_size = 0;
int msg_in_size;
/* Select buffer and message metadata for client or server */
if (client) {
buff = buff_in = buff_out = ctx->c_buff;
msg_count = ctx->c_msg_count;
@@ -471,29 +472,51 @@ int test_memio_move_message(struct test_memio_ctx *ctx, int client,
msg_count = ctx->s_msg_count;
msg_sizes = ctx->s_msg_sizes;
}
/* Validate input and output message positions */
if (msg_pos_in < 0 || msg_pos_in >= msg_count)
return -1;
if (msg_pos_out < 0 || msg_pos_out >= msg_count)
msg_pos_out = msg_count-1;
if (msg_pos_in == msg_pos_out)
return 0;
/* Get the size of the message to move */
msg_in_size = msg_sizes[msg_pos_in];
/* Calculate the total size of all messages */
for (i = 0; i < msg_count; i++)
total_size += msg_sizes[i];
/* Check if buffer has enough space for the move */
if (total_size + msg_in_size > TEST_MEMIO_BUF_SZ)
return -1;
/* Find the start of the input message in the buffer */
for (i = 0; i < msg_pos_in; i++)
buff_in += msg_sizes[i];
/* Find the position to move the message to in the buffer */
for (i = 0; i < msg_pos_out + (msg_pos_out > msg_pos_in ? 1 : 0); i++)
buff_out += msg_sizes[i];
/* Make space for the moved message at the output position */
XMEMMOVE(buff_out + msg_in_size, buff_out,
total_size - (buff_out - buff));
total_size += msg_in_size;
/* Adjust input pointer if it was after the output position */
if (buff_in > buff_out)
buff_in += msg_in_size;
/* Copy the message to its new position */
XMEMCPY(buff_out, buff_in, msg_in_size);
/* Remove the original message from its old position */
XMEMMOVE(buff_in, buff_in + msg_in_size,
total_size - (buff_in - buff) - msg_in_size);
/* Update the message sizes array to reflect the move */
if (msg_pos_in < msg_pos_out) {
XMEMMOVE(msg_sizes + msg_pos_in, msg_sizes + msg_pos_in + 1,
sizeof(*msg_sizes) *