strlcat (buffer, ";", buffer_size); \
strlcat (buffer, "inst_", buffer_size); \
strlcat (buffer, #field, buffer_size); \
strlcat (buffer, "=", buffer_size); \
strlcat (buffer, ";", buffer_size); \
strlcat (buffer, "inst_", buffer_size); \
strlcat (buffer, #field, buffer_size); \
strlcat (buffer, "=", buffer_size); \