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/* dctrl-tools - Debian control file inspection tools
Copyright © 2011, 2012 Antti-Juhani Kaijanaho
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <regex.h>
#include <stdlib.h>
#include "atom.h"
#include "msg.h"
#include "version.h"
#define RE_PKG_BEGIN "(^| )"
#define RE_PKG_END "([, \\(]|$)"
void atom_finish(struct atom * atom)
{
char * regex_pat = NULL;
int regex_patlen = atom->patlen + strlen(RE_PKG_BEGIN)
+ strlen(RE_PKG_END) + 1;
debug_message("predicate_finish_atom", 0);
if (atom->field_name != 0) {
char * repl = strchr(atom->field_name, ':');
if (repl != NULL) {
*repl++ = '\0';
atom->repl_inx = fieldtrie_insert(repl)->inx;
} else {
atom->repl_inx = -1;
}
atom->field_inx = fieldtrie_insert(atom->field_name)->inx;
}
if (atom->mode == M_REGEX || atom->mode == M_EREGEX) {
regex_pat = calloc(1, regex_patlen); /* rely on mem 0-ing */
if (regex_pat == 0) fatal_enomem(0);
if (atom->whole_pkg)
strncat(regex_pat, RE_PKG_BEGIN, strlen(RE_PKG_BEGIN));
strncat(regex_pat, atom->pat, atom->patlen);
if (atom->whole_pkg)
strncat(regex_pat, RE_PKG_END, strlen(RE_PKG_END));
debug_message("compiling:", 0);
debug_message(regex_pat, 0);
int rerr = regcomp(&atom->regex, regex_pat,
(atom->mode == M_EREGEX ? REG_EXTENDED : 0)
| REG_NOSUB
| (atom->ignore_case ? REG_ICASE : 0));
free(regex_pat);
if (rerr != 0) {
char * s;
s = get_regerror(rerr, &atom->regex);
if (s == 0) fatal_enomem(0);
message(L_FATAL, 0, "%s", s);
free(s);
fail();
}
}
}
static bool atom_field_verify(struct atom * atom, FSAF * fp,
size_t start, size_t end)
{
size_t len = end - start;
struct fsaf_read_rv r = fsaf_read(fp, start, len);
assert(r.len == len);
switch (atom->mode) {
case M_EXACT:
if (len != atom->patlen) return false;
if (atom->ignore_case) {
return strncasecmp(atom->pat, r.b, len) == 0;
} else {
return strncmp(atom->pat, r.b, len) == 0;
}
case M_SUBSTR: {
#if 0
if (atom->ignore_case) {
return strncasestr(r.b, atom->pat, len);
} else {
return strnstr(r.b, atom->pat, len);
}
#else
bool rv;
char * s = strndup(r.b, len);
if (s == 0) fatal_enomem(0);
if (atom->ignore_case) {
rv = strcasestr(s, atom->pat) != 0;
} else {
rv = strstr(s, atom->pat) != 0;
}
free(s);
return rv;
#endif
}
case M_REGEX: case M_EREGEX: {
char * s = strndup(r.b, len);
if (s == 0) fatal_enomem(0);
int regex_errcode = regexec(&atom->regex, s, 0, 0, 0);
free(s);
if (regex_errcode == 0 || regex_errcode == REG_NOMATCH) {
return (regex_errcode == 0);
}
/* Error handling be here. */
assert(regex_errcode != 0 && regex_errcode != REG_NOMATCH);
s = get_regerror (regex_errcode, &atom->regex);
if (s == 0) { enomem (0); return false; }
message(L_IMPORTANT, 0, "%s", s);
free(s);
return false;
}
case M_VER_EQ:case M_VER_LT:case M_VER_LE:case M_VER_GT:case M_VER_GE:
;
char *pats = strndup(atom->pat, atom->patlen);
char *cands = strndup(r.b, len);
struct versionrevision pat, cand;
if (!parse_version(&pat, pats, atom->patlen)) {
free(pats);
free(cands);
return false;
}
if (!parse_version(&cand, cands, len)) {
free(pats);
free(cands);
return false;
}
int res = versioncompare(&cand, &pat);
free(pats);
free(cands);
switch (atom->mode) {
case M_VER_EQ:
return res == 0;
case M_VER_LT:
return res < 0;
case M_VER_LE:
return res <= 0;
case M_VER_GT:
return res > 0;
case M_VER_GE:
return res >= 0;
default:
assert(0);
}
}
assert(0);
}
bool atom_verify(struct atom * at, para_t * par)
{
FSAF * fp = par->common->fp;
if (at->field_inx == (size_t)-1) {
/* Take the full paragraph */
return atom_field_verify(at, fp, par->start, par->end);
}
/* Test field(s) */
struct field_data fds = find_field_wr(par, at->field_inx, at->repl_inx);
for (struct field_datum * fd = fds.first; fd != NULL; fd = fd->next) {
if (atom_field_verify(at, fp, fd->start, fd->end)) return true;
}
return false;
}
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