/*
* creates the data segment into an byte array supplied as argument data
* and update the file header instruction pointer 8-byte aligned
*
* returns length of the data segment
*/
static size_t create_data_segment(u_char** data, struct filter_header *fh, struct filter_op *fop, size_t n)
{
size_t i, len = 0;
for (i = 0; i < n; i++) {
switch(fop[i].opcode) {
case FOP_FUNC:
if (fop[i].op.func.slen) {
ef_debug(1, "@");
len += add_data_segment(data, len, &fop[i].op.func.string, fop[i].op.func.slen);
}
if (fop[i].op.func.rlen) {
ef_debug(1, "@");
len += add_data_segment(data, len, &fop[i].op.func.replace, fop[i].op.func.rlen);
}
break;
case FOP_TEST:
if (fop[i].op.test.slen) {
ef_debug(1, "@");
len += add_data_segment(data, len, &fop[i].op.test.string, fop[i].op.test.slen);
}
break;
case FOP_ASSIGN:
if (fop[i].op.assign.slen) {
ef_debug(1, "@");
len += add_data_segment(data, len, &fop[i].op.test.string, fop[i].op.test.slen);
}
break;
}
}
/* where starts the code ? */
fh->code = fh->data + len;
/* 8-byte aligned please */
if (fh->code % 8)
fh->code += 8 - fh->code % 8;
return len;
}
/*
* creates the data segment into an array
* and update the file header
*/
static u_char * create_data_segment(struct filter_header *fh, struct filter_op *fop, size_t n)
{
size_t i, len = 0;
u_char *data = NULL;
for (i = 0; i < n; i++) {
switch(fop[i].opcode) {
case FOP_FUNC:
if (fop[i].op.func.slen) {
ef_debug(1, "@");
len += add_data_segment(&data, len, &fop[i].op.func.string, fop[i].op.func.slen);
}
if (fop[i].op.func.rlen) {
ef_debug(1, "@");
len += add_data_segment(&data, len, &fop[i].op.func.replace, fop[i].op.func.rlen);
}
break;
case FOP_TEST:
if (fop[i].op.test.slen) {
ef_debug(1, "@");
len += add_data_segment(&data, len, &fop[i].op.test.string, fop[i].op.test.slen);
}
break;
case FOP_ASSIGN:
if (fop[i].op.assign.slen) {
ef_debug(1, "@");
len += add_data_segment(&data, len, &fop[i].op.test.string, fop[i].op.test.slen);
}
break;
}
}
/* where starts the code ? */
fh->code = fh->data + len;
return data;
}