/* u2_ci_tape(): from a C string, to a list of bytes.
*/
u2_atom
u2_ci_tape(const c3_c* txt_c)
{
if ( !*txt_c ) {
return u2_nul;
} else return u2nc(*txt_c, u2_ci_tape(txt_c + 1));
}
u2_noun // produce
j2_mbc(Pt5, repg)(u2_wire wir_r,
u2_noun lub,
u2_noun rad,
u2_noun rep) // retain
{
c3_y* lub_y = u2_cr_tape(lub);
c3_y* rad_y = u2_cr_tape(rad);
c3_y* rep_y = u2_cr_tape(rep);
char* rec = (char*)lub_y;
char* end;
while(*rec != 0) {
if(*rec == '\\') {
rec++;
switch (*rec) {
case 'P':
case 'p':
free(lub_y);
free(rad_y);
return u2_nul;
case 'Q':
end = strstr(rec, "\\E");
if(end == NULL) rec += strlen(rec) - 1;
else rec = end;
}
rec++;
}
else if(*rec == '(') {
rec++;
if(*rec == '?') {
rec++;
if(*rec != ':') {
free(lub_y);
free(rad_y);
return u2_nul;
}
rec++;
}
}
else
rec++;
}
cre2_regexp_t * rex;
cre2_options_t * opt;
opt = cre2_opt_new();
if (opt) {
cre2_opt_set_log_errors(opt, 0);
cre2_opt_set_encoding(opt, CRE2_Latin1);
cre2_opt_set_perl_classes(opt, 1);
cre2_opt_set_one_line(opt, 1);
cre2_opt_set_longest_match(opt, 1);
rex = cre2_new((const char *)lub_y, strlen((char *)lub_y), opt);
if (rex) {
if (!cre2_error_code(rex)) {
int text_len = strlen((char *)rad_y);
cre2_string_t matches[1];
int ic = 0;
u2_noun ret = u2_nul;
while (ic <= text_len) {
int match = cre2_match(rex, (const char*)rad_y, text_len, ic, text_len, CRE2_ANCHOR_START, matches, 1);
if (!match) {
if(rad_y[ic])
ret = u2_cn_cell((u2_atom)rad_y[ic], ret);
ic++;
}
else {
int mlen = matches[0].length;
if (mlen == 0) {
ret = u2_ckb_weld(u2_ckb_flop(u2_ci_tape((char *) rad_y+ic)), u2_ckb_flop(u2_ci_tape((char *)rep_y)));
ic = text_len + 1;
}
else {
ret = u2_ckb_weld(u2_ckb_flop(u2_ci_tape((char *)rep_y)), ret);
ic += mlen;
}
}
}
cre2_opt_delete(opt);
cre2_delete(rex);
free(lub_y);
free(rad_y);
free(rep_y);
return u2_cn_cell(u2_nul, u2_ckb_flop(ret));
}
else {
// Compiling the regular expression failed
cre2_opt_delete(opt);
cre2_delete(rex);
free(lub_y);
free(rad_y);
return u2_nul;
}
cre2_opt_delete(opt);
cre2_delete(rex);
}
else {
// rex Allocation Error
cre2_opt_delete(opt);
free(lub_y);
free(rad_y);
u2_bl_bail(wir_r, c3__exit);
}
cre2_opt_delete(opt);
}
// opt Allocation Error
free(lub_y);
free(rad_y);
u2_bl_bail(wir_r, c3__exit);
return u2_nul;
}
