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search.c
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/*
mairix - message index builder and finder for maildir folders.
**********************************************************************
* Copyright (C) Richard P. Curnow 2002,2003,2004,2005,2006
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* 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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <unistd.h>
#include <assert.h>
#include <dirent.h>
#include <errno.h>
/* Lame fix for systems where NAME_MAX isn't defined after including the above
* set of .h files (Solaris, FreeBSD so far). Probably grossly oversized but
* it'll do. */
#if !defined(NAME_MAX)
#define NAME_MAX 4096
#endif
#include "mairix.h"
#include "reader.h"
#include "memmac.h"
#include "imapinterface.h"
static void mark_hits_in_table(struct read_db *db, struct toktable_db *tt, int hit_tok, char *hits)/*{{{*/
{
/* mark files containing matched token */
int idx;
unsigned char *j, *first_char;
idx = 0;
first_char = (unsigned char *) db->data + tt->enc_offsets[hit_tok];
for (j = first_char; *j != 0xff; ) {
idx += read_increment(&j);
assert(idx < db->n_msgs);
hits[idx] = 1;
}
}
/*}}}*/
static void mark_hits_in_table2(struct read_db *db, struct toktable2_db *tt, int hit_tok, char *hits)/*{{{*/
{
/* mark files containing matched token */
int idx;
unsigned char *j, *first_char;
idx = 0;
first_char = (unsigned char *) db->data + tt->enc1_offsets[hit_tok];
for (j = first_char; *j != 0xff; ) {
idx += read_increment(&j);
assert(idx < db->n_msgs);
hits[idx] = 1;
}
}
/*}}}*/
/* See "Fast text searching with errors, Sun Wu and Udi Manber, TR 91-11,
University of Arizona. I have been informed that this algorithm is NOT
patented. This implementation of it is entirely the work of Richard P.
Curnow - I haven't looked at any related source (webglimpse, agrep etc) in
writing this.
*/
static void build_match_vector(char *substring, unsigned long *a, unsigned long *hit)/*{{{*/
{
int len;
char *p;
int i;
len = strlen(substring);
if (len > 31 || len == 0) {
fprintf(stderr, "Can't match patterns longer than 31 characters or empty\n");
unlock_and_exit(2);
}
memset(a, 0xff, 256 * sizeof(unsigned long));
for (p=substring, i=0; *p; p++, i++) {
a[(unsigned int) *(unsigned char *)p] &= ~(1UL << i);
}
*hit = ~(1UL << (len-1));
return;
}
/*}}}*/
static int substring_match_0(unsigned long *a, unsigned long hit, int left_anchor, char *token)/*{{{*/
{
int got_hit=0;
char *p;
unsigned long r0;
unsigned long anchor, anchor1;
r0 = ~0;
got_hit = 0;
anchor = 0;
anchor1 = left_anchor ? 0x1 : 0x0;
for(p=token; *p; p++) {
int idx = (unsigned int) *(unsigned char *)p;
r0 = (r0<<1) | anchor | a[idx];
if (~(r0 | hit)) {
got_hit = 1;
break;
}
anchor = anchor1;
}
return got_hit;
}
/*}}}*/
static int substring_match_1(unsigned long *a, unsigned long hit, int left_anchor, char *token)/*{{{*/
{
int got_hit=0;
char *p;
unsigned long r0, r1, nr0;
unsigned long anchor, anchor1;
r0 = ~0;
r1 = r0<<1;
got_hit = 0;
anchor = 0;
anchor1 = left_anchor ? 0x1 : 0x0;
for(p=token; *p; p++) {
int idx = (unsigned int) *(unsigned char *)p;
nr0 = (r0<<1) | anchor | a[idx];
r1 = ((r1<<1) | anchor | a[idx]) & ((r0 & nr0) << 1) & r0;
r0 = nr0;
if (~((r0 & r1) | hit)) {
got_hit = 1;
break;
}
anchor = anchor1;
}
return got_hit;
}
/*}}}*/
static int substring_match_2(unsigned long *a, unsigned long hit, int left_anchor, char *token)/*{{{*/
{
int got_hit=0;
char *p;
unsigned long r0, r1, r2, nr0, nr1;
unsigned long anchor, anchor1;
r0 = ~0;
r1 = r0<<1;
r2 = r1<<1;
got_hit = 0;
anchor = 0;
anchor1 = left_anchor ? 0x1 : 0x0;
for(p=token; *p; p++) {
int idx = (unsigned int) *(unsigned char *)p;
nr0 = (r0<<1) | anchor | a[idx];
nr1 = ((r1<<1) | anchor | a[idx]) & ((r0 & nr0) << 1) & r0;
r2 = ((r2<<1) | anchor | a[idx]) & ((r1 & nr1) << 1) & r1;
r0 = nr0;
r1 = nr1;
if (~((r0 & r1 & r2) | hit)) {
got_hit = 1;
break;
}
anchor = anchor1;
}
return got_hit;
}
/*}}}*/
static int substring_match_3(unsigned long *a, unsigned long hit, int left_anchor, char *token)/*{{{*/
{
int got_hit=0;
char *p;
unsigned long r0, r1, r2, r3, nr0, nr1, nr2;
unsigned long anchor, anchor1;
r0 = ~0;
r1 = r0<<1;
r2 = r1<<1;
r3 = r2<<1;
got_hit = 0;
anchor = 0;
anchor1 = left_anchor ? 0x1 : 0x0;
for(p=token; *p; p++) {
int idx = (unsigned int) *(unsigned char *)p;
nr0 = (r0<<1) | anchor | a[idx];
nr1 = ((r1<<1) | anchor | a[idx]) & ((r0 & nr0) << 1) & r0;
nr2 = ((r2<<1) | anchor | a[idx]) & ((r1 & nr1) << 1) & r1;
r3 = ((r3<<1) | anchor | a[idx]) & ((r2 & nr2) << 1) & r2;
r0 = nr0;
r1 = nr1;
r2 = nr2;
if (~((r0 & r1 & r2 & r3) | hit)) {
got_hit = 1;
break;
}
anchor = anchor1;
}
return got_hit;
}
/*}}}*/
static int substring_match_general(unsigned long *a, unsigned long hit, int left_anchor, char *token, int max_errors, unsigned long *r, unsigned long *nr)/*{{{*/
{
int got_hit=0;
char *p;
int j;
unsigned long anchor, anchor1;
r[0] = ~0;
anchor = 0;
anchor1 = left_anchor ? 0x1 : 0x0;
for (j=1; j<=max_errors; j++) {
r[j] = r[j-1] << 1;
}
got_hit = 0;
for(p=token; *p; p++) {
int idx = (unsigned int) *(unsigned char *)p;
int d;
unsigned int compo;
compo = nr[0] = ((r[0]<<1) | anchor | a[idx]);
for (d=1; d<=max_errors; d++) {
nr[d] = ((r[d]<<1) | anchor | a[idx])
& ((r[d-1] & nr[d-1])<<1)
& r[d-1];
compo &= nr[d];
}
memcpy(r, nr, (1 + max_errors) * sizeof(unsigned long));
if (~(compo | hit)) {
got_hit = 1;
break;
}
anchor = anchor1;
}
return got_hit;
}
/*}}}*/
static void match_substring_in_table(struct read_db *db, struct toktable_db *tt, char *substring, int max_errors, int left_anchor, char *hits)/*{{{*/
{
int i, got_hit;
unsigned long a[256];
unsigned long *r=NULL, *nr=NULL;
unsigned long hit;
char *token;
build_match_vector(substring, a, &hit);
got_hit = 0;
if (max_errors > 3) {
r = new_array(unsigned long, 1 + max_errors);
nr = new_array(unsigned long, 1 + max_errors);
}
for (i=0; i<tt->n; i++) {
token = db->data + tt->tok_offsets[i];
switch (max_errors) {
/* Optimise common cases for few errors to allow optimizer to keep bitmaps
* in registers */
case 0:
got_hit = substring_match_0(a, hit, left_anchor, token);
break;
case 1:
got_hit = substring_match_1(a, hit, left_anchor, token);
break;
case 2:
got_hit = substring_match_2(a, hit, left_anchor, token);
break;
case 3:
got_hit = substring_match_3(a, hit, left_anchor, token);
break;
default:
got_hit = substring_match_general(a, hit, left_anchor, token, max_errors, r, nr);
break;
}
if (got_hit) {
mark_hits_in_table(db, tt, i, hits);
}
}
if (r) free(r);
if (nr) free(nr);
}
/*}}}*/
static void match_substring_in_paths(struct read_db *db, char *substring, int max_errors, int left_anchor, char *hits)/*{{{*/
{
int i;
unsigned long a[256];
unsigned long *r=NULL, *nr=NULL;
unsigned long hit;
build_match_vector(substring, a, &hit);
if (max_errors > 3) {
r = new_array(unsigned long, 1 + max_errors);
nr = new_array(unsigned long, 1 + max_errors);
}
for (i=0; i<db->n_msgs; i++) {
char *token = NULL;
unsigned int mbix, msgix;
switch (rd_msg_type(db, i)) {
case DB_MSG_FILE:
token = db->data + db->path_offsets[i];
break;
case DB_MSG_MBOX:
decode_mbox_indices(db->path_offsets[i], &mbix, &msgix);
token = db->data + db->mbox_paths_table[mbix];
break;
case DB_MSG_DEAD:
hits[i] = 0; /* never match on dead paths */
goto next_message;
}
assert(token);
switch (max_errors) {
/* Optimise common cases for few errors to allow optimizer to keep bitmaps
* in registers */
case 0:
hits[i] = substring_match_0(a, hit, left_anchor, token);
break;
case 1:
hits[i] = substring_match_1(a, hit, left_anchor, token);
break;
case 2:
hits[i] = substring_match_2(a, hit, left_anchor, token);
break;
case 3:
hits[i] = substring_match_3(a, hit, left_anchor, token);
break;
default:
hits[i] = substring_match_general(a, hit, left_anchor, token, max_errors, r, nr);
break;
}
next_message:
(void) 0;
}
if (r) free(r);
if (nr) free(nr);
}
/*}}}*/
static void match_string_in_table(struct read_db *db, struct toktable_db *tt, char *key, char *hits)/*{{{*/
{
/* TODO : replace with binary search? */
int i;
for (i=0; i<tt->n; i++) {
if (!strcmp(key, db->data + tt->tok_offsets[i])) {
/* get all matching files */
mark_hits_in_table(db, tt, i, hits);
}
}
}
/*}}}*/
static void match_string_in_table2(struct read_db *db, struct toktable2_db *tt, char *key, char *hits)/*{{{*/
{
/* TODO : replace with binary search? */
int i;
for (i=0; i<tt->n; i++) {
if (!strcmp(key, db->data + tt->tok_offsets[i])) {
/* get all matching files */
mark_hits_in_table2(db, tt, i, hits);
}
}
}
/*}}}*/
static int parse_size_expr(char *x)/*{{{*/
{
int result;
int n;
if (1 == sscanf(x, "%d%n", &result, &n)) {
x += n;
switch (*x) {
case 'k':
case 'K':
result <<= 10;
break;
case 'm':
case 'M':
result <<= 20;
break;
default:
break;
}
return result;
} else {
fprintf(stderr, "Could not parse message size expression <%s>\n", x);
return -1;
}
}
/*}}}*/
static void parse_size_range(char *size_expr, int *has_start, int *start, int *has_end, int *end)/*{{{*/
{
char *x = size_expr;
char *dash;
int len;
if (*x == ':') x++;
len = strlen(x);
dash = strchr(x, '-');
*has_start = *has_end = 0;
if (dash) {
char *p, *q;
if (dash > x) {
char *s;
s = new_array(char, dash - x + 1);
for (p=s, q=x; q<dash; ) *p++ = *q++;
*p = 0;
*start = parse_size_expr(s);
*has_start = 1;
free(s);
}
if (dash[1]) { /* dash not at end of arg */
char *e;
e = new_array(char, (x + len) - dash);
for (p=e, q=dash+1; *q; ) *p++ = *q++;
*p = 0;
*end = parse_size_expr(e);
*has_end = 1;
free(e);
}
} else {
*has_start = 0;
*end = parse_size_expr(size_expr);
*has_end = 1;
}
return;
}
/*}}}*/
static void find_size_matches_in_table(struct read_db *db, char *size_expr, char *hits)/*{{{*/
{
int start, end;
int has_start, has_end, start_cond, end_cond;
int i;
start = end = -1; /* avoid compiler warning about uninitialised variables. */
parse_size_range(size_expr, &has_start, &start, &has_end, &end);
if (has_start && has_end) {
/* Allow user to put the endpoints in backwards */
if (start > end) {
int temp = start;
start = end;
end = temp;
}
}
for (i=0; i<db->n_msgs; i++) {
start_cond = has_start ? (db->size_table[i] > start) : 1;
end_cond = has_end ? (db->size_table[i] < end ) : 1;
if (start_cond && end_cond) {
hits[i] = 1;
}
}
}
/*}}}*/
static void find_date_matches_in_table(struct read_db *db, char *date_expr, char *hits)/*{{{*/
{
time_t start, end;
int has_start, has_end, start_cond, end_cond;
int i;
int status;
status = scan_date_string(date_expr, &start, &has_start, &end, &has_end);
if (status) {
unlock_and_exit (2);
}
if (has_start && has_end) {
/* Allow user to put the endpoints in backwards */
if (start > end) {
time_t temp = start;
start = end;
end = temp;
}
}
for (i=0; i<db->n_msgs; i++) {
start_cond = has_start ? (db->date_table[i] > start) : 1;
end_cond = has_end ? (db->date_table[i] < end ) : 1;
if (start_cond && end_cond) {
hits[i] = 1;
}
}
}
/*}}}*/
static void find_flag_matches_in_table(struct read_db *db, char *flag_expr, char *hits)/*{{{*/
{
int pos_seen, neg_seen;
int pos_replied, neg_replied;
int pos_flagged, neg_flagged;
int negate;
char *p;
int i;
negate = 0;
pos_seen = neg_seen = 0;
pos_replied = neg_replied = 0;
pos_flagged = neg_flagged = 0;
for (p=flag_expr; *p; p++) {
switch (*p) {
case '-':
negate = 1;
break;
case 's':
case 'S':
if (negate) neg_seen = 1;
else pos_seen = 1;
negate = 0;
break;
case 'r':
case 'R':
if (negate) neg_replied = 1;
else pos_replied = 1;
negate = 0;
break;
case 'f':
case 'F':
if (negate) neg_flagged = 1;
else pos_flagged = 1;
negate = 0;
break;
default:
fprintf(stderr, "Did not understand the character '%c' (0x%02x) in the flags argument F:%s\n",
isprint(*p) ? *p : '.',
(int) *(unsigned char *) p,
flag_expr);
break;
}
}
for (i=0; i<db->n_msgs; i++) {
if ((!pos_seen || (db->msg_type_and_flags[i] & FLAG_SEEN)) &&
(!neg_seen || !(db->msg_type_and_flags[i] & FLAG_SEEN)) &&
(!pos_replied || (db->msg_type_and_flags[i] & FLAG_REPLIED)) &&
(!neg_replied || !(db->msg_type_and_flags[i] & FLAG_REPLIED)) &&
(!pos_flagged || (db->msg_type_and_flags[i] & FLAG_FLAGGED)) &&
(!neg_flagged || !(db->msg_type_and_flags[i] & FLAG_FLAGGED))) {
hits[i] = 1;
}
}
}
/*}}}*/
static char *mk_maildir_path(int token, char *output_dir, int is_in_new,
int is_seen, int is_replied, int is_flagged)/*{{{*/
{
char *result;
char uniq_buf[48];
int len;
len = strlen(output_dir) + 64; /* oversize */
result = new_array(char, len + 1 + sizeof(":2,FRS"));
strcpy(result, output_dir);
strcat(result, is_in_new ? "/new/" : "/cur/");
sprintf(uniq_buf, "123456789.%d.mairix", token);
strcat(result, uniq_buf);
if (is_seen || is_replied || is_flagged) {
strcat(result, ":2,");
}
if (is_flagged) strcat(result, "F");
if (is_replied) strcat(result, "R");
if (is_seen) strcat(result, "S");
return result;
}
/*}}}*/
static char *mk_mh_path(int token, char *output_dir)/*{{{*/
{
char *result;
char uniq_buf[8];
int len;
len = strlen(output_dir) + 10; /* oversize */
result = new_array(char, len);
strcpy(result, output_dir);
strcat(result, "/");
sprintf(uniq_buf, "%d", token+1);
strcat(result, uniq_buf);
return result;
}
/*}}}*/
static int looks_like_maildir_new_p(const char *p)/*{{{*/
{
const char *s1, *s2;
s2 = p;
while (*s2) s2++;
while ((s2 > p) && (*s2 != '/')) s2--;
if (s2 <= p) return 0;
s1 = s2 - 1;
while ((s1 > p) && (*s1 != '/')) s1--;
if (s1 <= p) return 0;
if (!strncmp(s1, "/new/", 5)) {
return 1;
} else {
return 0;
}
}
/*}}}*/
static void create_symlink(char *link_target, char *new_link)/*{{{*/
{
if ((!do_hardlinks && symlink(link_target, new_link) < 0) || link(link_target, new_link)) {
if (verbose) {
perror("symlink");
fprintf(stderr, "Failed path <%s> -> <%s>\n", link_target, new_link);
}
}
}
/*}}}*/
static void mbox_terminate(const unsigned char *data, int len, FILE *out)/*{{{*/
{
if (len == 0)
fputs("\n", out);
else if (len == 1) {
if (data[0] != '\n')
fputs("\n", out);
}
else if (data[len-1] != '\n')
fputs("\n\n", out);
else if (data[len-2] != '\n')
fputs("\n", out);
}
/*}}}*/
static void append_file_to_mbox(const char *path, FILE *out)/*{{{*/
{
unsigned char *data;
int len;
create_ro_mapping(path, &data, &len, MAP_DECOMPRESS_IF_APPLICABLE);
if (data) {
fprintf(out, "From mairix@mairix Mon Jan 1 12:34:56 1970\n");
fprintf(out, "X-source-folder: %s\n", path);
fwrite (data, sizeof(unsigned char), len, out);
mbox_terminate(data, len, out);
free_ro_mapping(data, len);
}
return;
}
/*}}}*/
static void append_data_to_mbox(const char *data, size_t len, void *arg)/*{{{*/
{
FILE *out = (FILE *)arg;
fprintf(out, "From mairix@mairix Mon Jan 1 12:34:56 1970\n");
fwrite (data, sizeof(unsigned char), len, out);
fputc('\n', out);
return;
}
/*}}}*/
static void write_to_file(const char *data, size_t len, void *arg)/*{{{*/
{
FILE *fp;
if (!(fp = fopen((char *)arg, "w"))) {
fprintf(stderr, "Cannot write matched message to \"%s\": %s\n", (char *)arg, strerror(errno));
return;
}
fwrite(data, 1, len, fp);
fclose(fp);
}
/*}}}*/
static int had_failed_checksum;
static void get_validated_mbox_msg(struct read_db *db, int msg_index,/*{{{*/
int *mbox_index,
unsigned char **mbox_data, int *mbox_len,
unsigned char **msg_data, int *msg_len)
{
/* msg_data==NULL if checksum mismatches */
unsigned char *start;
checksum_t csum;
unsigned int mbi, msgi;
*msg_data = NULL;
*msg_len = 0;
decode_mbox_indices(db->path_offsets[msg_index], &mbi, &msgi);
*mbox_index = mbi;
create_ro_mapping(db->data + db->mbox_paths_table[mbi], mbox_data, mbox_len,
MAP_DECOMPRESS_IF_APPLICABLE);
if (!*mbox_data) return;
start = *mbox_data + db->mtime_table[msg_index];
/* Ensure that we don't run off the end of the mmap'd file */
if (db->mtime_table[msg_index] >= *mbox_len)
*msg_len = 0;
else if (db->mtime_table[msg_index] + db->size_table[msg_index] >= *mbox_len)
*msg_len = *mbox_len - db->mtime_table[msg_index];
else
*msg_len = db->size_table[msg_index];
compute_checksum((char *)start, *msg_len, &csum);
if (!memcmp((db->data + db->mbox_checksum_table[mbi] + (msgi * sizeof(checksum_t))), &csum, sizeof(checksum_t))) {
*msg_data = start;
} else {
had_failed_checksum = 1;
}
return;
}
/*}}}*/
static void append_mboxmsg_to_mbox(struct read_db *db, int msg_index, FILE *out)/*{{{*/
{
/* Need to common up code with try_copy_to_path */
unsigned char *mbox_start, *msg_start;
int mbox_len, msg_len;
int mbox_index;
get_validated_mbox_msg(db, msg_index, &mbox_index, &mbox_start, &mbox_len, &msg_start, &msg_len);
if (msg_start) {
/* Artificial from line, we don't have the envelope sender so this is
going to be artificial anyway. */
fprintf(out, "From mairix@mairix Mon Jan 1 12:34:56 1970\n");
fprintf(out, "X-source-folder: %s\n",
db->data + db->mbox_paths_table[mbox_index]);
fwrite(msg_start, sizeof(unsigned char), msg_len, out);
mbox_terminate(msg_start, msg_len, out);
}
if (mbox_start) {
free_ro_mapping(mbox_start, mbox_len);
}
}
/*}}}*/
static void try_copy_to_path(struct read_db *db, int msg_index, char *target_path)/*{{{*/
{
unsigned char *data;
int mbox_len, msg_len;
int mbi;
FILE *out;
unsigned char *start;
get_validated_mbox_msg(db, msg_index, &mbi, &data, &mbox_len, &start, &msg_len);
if (start) {
out = fopen(target_path, "wb");
if (out) {
fprintf(out, "X-source-folder: %s\n",
db->data + db->mbox_paths_table[mbi]);
fwrite(start, sizeof(char), msg_len?msg_len-1:0, out);
fclose(out);
}
}
if (data) {
free_ro_mapping(data, mbox_len);
}
return;
}
/*}}}*/
static struct msg_src *setup_mbox_msg_src(char *filename, off_t start, size_t len)/*{{{*/
{
static struct msg_src result;
result.type = MS_MBOX;
result.filename = filename;
result.start = start;
result.len = len;
return &result;
}
/*}}}*/
static void get_flags_from_file(struct read_db *db, int idx, int *is_seen, int *is_replied, int *is_flagged)
{
*is_seen = (db->msg_type_and_flags[idx] & FLAG_SEEN) ? 1 : 0;
*is_replied = (db->msg_type_and_flags[idx] & FLAG_REPLIED) ? 1 : 0;
*is_flagged = (db->msg_type_and_flags[idx] & FLAG_FLAGGED) ? 1 : 0;
}
static void string_tolower(char *str)
{
char *p;
for (p=str; *p; p++) {
*p = tolower(*(unsigned char *)p);
}
}
static struct read_db *qsortdb;
static int db_date_cmp(const void *va, const void *vb)
{
const int *ap = (const int *) va;
const int *bp = (const int *) vb;
return qsortdb->date_table[*ap] - qsortdb->date_table[*bp];
}
static int do_search(struct read_db *db, char **args, char *output_path, int show_threads, enum folder_type ft, int verbose, const char *imap_pipe, const char *imap_server, const char *imap_username, const char *imap_password, int please_clear, int sort_by_date)/*{{{*/
{
char *colon, *start_words;
int do_body, do_subject, do_from, do_to, do_cc, do_date, do_size;
int do_att_name;
int do_flags;
int do_path, do_msgid;
char *key;
char *hit0, *hit1, *hit2, *hit3;
int i;
int ii;
int n_hits;
int left_anchor;
int imap_tried = 0;
struct imap_ll *imapc;
int *results;
#define GET_IMAP if (!imap_tried) {\
imap_tried = 1;\
if (imap_pipe || imap_server) {\
imapc = imap_start(imap_pipe, imap_server, imap_username, imap_password);\
} else {\
fprintf(stderr, "[No IMAP settings]\n");\
imapc = NULL;\
}\
}
had_failed_checksum = 0;
hit0 = new_array(char, db->n_msgs);
hit1 = new_array(char, db->n_msgs);
hit2 = new_array(char, db->n_msgs);
hit3 = new_array(char, db->n_msgs);
/* Argument structure is
* x:tokena+tokenb,~tokenc,tokend+tokene
*
* + (and) binds more tightly than ,
* , (or) binds more tightly than separate args
*
*
* hit1 gathers the tokens and'ed with +
* hit2 gathers the tokens or'ed with ,
* hit3 gathers the separate args and'ed with <gap>
* */
/* Everything matches until proven otherwise */
memset(hit3, 1, db->n_msgs);
while (*args) {
/* key is a single argument, separate args are and-ed together */
key = *args++;
memset(hit2, 0, db->n_msgs);
memset(hit1, 1, db->n_msgs);
do_to = 0;
do_cc = 0;
do_from = 0;
do_subject = 0;
do_body = 0;
do_date = 0;
do_size = 0;
do_path = 0;
do_msgid = 0;
do_att_name = 0;
do_flags = 0;
colon = strchr(key, ':');
if (colon) {
char *p;
for (p=key; p<colon; p++) {
switch(*p) {
case 'b': do_body = 1; break;
case 's': do_subject = 1; break;
case 't': do_to = 1; break;
case 'c': do_cc = 1; break;
case 'f': do_from = 1; break;
case 'r': do_to = do_cc = 1; break;
case 'a': do_to = do_cc = do_from = 1; break;
case 'd': do_date = 1; break;
case 'z': do_size = 1; break;
case 'p': do_path = 1; break;
case 'm': do_msgid = 1; break;
case 'n': do_att_name = 1; break;
case 'F': do_flags = 1; break;
default: fprintf(stderr, "Unknown key type <%c>\n", *p); break;
}
}
if (do_msgid && (p-key) > 1) {
fprintf(stderr, "Message-ID key <m> can't be used with other keys\n");
unlock_and_exit(2);
}
start_words = 1 + colon;
} else {
do_body = do_subject = do_to = do_cc = do_from = 1;
start_words = key;
}
if (do_date || do_size || do_flags) {
memset(hit0, 0, db->n_msgs);
if (do_date) {
find_date_matches_in_table(db, start_words, hit0);
} else if (do_size) {
find_size_matches_in_table(db, start_words, hit0);
} else if (do_flags) {
find_flag_matches_in_table(db, start_words, hit0);
}
/* AND-combine match vectors */
for (i=0; i<db->n_msgs; i++) {
hit1[i] &= hit0[i];
}
} else if (do_msgid) {
char *lower_word = new_string(start_words);
string_tolower(lower_word);
memset(hit0, 0, db->n_msgs);
match_string_in_table2(db, &db->msg_ids, lower_word, hit0);
free(lower_word);
/* AND-combine match vectors */
for (i=0; i<db->n_msgs; i++) {
hit1[i] &= hit0[i];
}
} else {
/*{{{ Scan over separate words within this argument */
do {
/* / = 'or' separator
* , = 'and' separator */
char *orsep;
char *andsep;
char *word, *orig_word, *lower_word;
char *equal;
int negate;
int had_orsep;
int max_errors;
orsep = strchr(start_words, '/');
andsep = strchr(start_words, ',');
had_orsep = 0;
if (andsep && (!orsep || (andsep < orsep))) {
char *p, *q;
word = new_array(char, 1 + (andsep - start_words)); /* maybe oversize */
for (p=word, q=start_words; q < andsep; q++) {
if (!isspace(*(unsigned char *)q)) {
*p++ = *q;
}
}
*p = 0;
start_words = andsep + 1;
} else if (orsep) { /* comes before + if there's a + */
char *p, *q;
word = new_array(char, 1 + (orsep - start_words)); /* maybe oversize */
for (p=word, q=start_words; q < orsep; q++) {
if (!isspace(*(unsigned char *)q)) {
*p++ = *q;
}
}
*p = 0;
start_words = orsep + 1;
had_orsep = 1;
} else {
word = new_string(start_words);
while (*start_words) ++start_words;
}
orig_word = word;
if (word[0] == '~') {
negate = 1;
word++;
} else {
negate = 0;
}
if (word[0] == '^') {
left_anchor = 1;
word++;
} else {
left_anchor = 0;
}
equal = strchr(word, '=');
if (equal && (equal[1] == '\0' || isdigit(equal[1]))) {
*equal = 0;
max_errors = atoi(equal + 1);
/* Extend this to do anchoring etc */
} else {
equal = NULL;
max_errors = 0; /* keep GCC quiet */
}
/* Canonicalise search string to lowercase, since the database has all
* tokens handled that way. But not for path search! */
lower_word = new_string(word);
string_tolower(lower_word);
memset(hit0, 0, db->n_msgs);
if (equal) {
if (do_to) match_substring_in_table(db, &db->to, lower_word, max_errors, left_anchor, hit0);