ref: 39c3fd117ab4988c041800490b23c2aedb1858d3
dir: /sys/src/cmd/upas/imap4d/search.c/
#include "imap4d.h"
static int
filesearch(Msg *m, char *file, char *pat)
{
char buf[Bufsize + 1];
int n, nbuf, npat, fd, ok;
npat = strlen(pat);
if(npat >= Bufsize/2)
return 0;
fd = msgfile(m, file);
if(fd < 0)
return 0;
ok = 0;
nbuf = 0;
for(;;){
n = read(fd, &buf[nbuf], Bufsize - nbuf);
if(n <= 0)
break;
nbuf += n;
buf[nbuf] = '\0';
if(cistrstr(buf, pat) != nil){
ok = 1;
break;
}
if(nbuf > npat){
memmove(buf, &buf[nbuf - npat], npat);
nbuf = npat;
}
}
close(fd);
return ok;
}
static int
headersearch(Msg *m, char *hdr, char *pat)
{
char *s, *t;
int ok, n;
Slist hdrs;
n = m->head.size + 3;
s = emalloc(n);
hdrs.next = nil;
hdrs.s = hdr;
ok = 0;
if(selectfields(s, n, m->head.buf, &hdrs, 1) > 0){
t = strchr(s, ':');
if(t != nil && cistrstr(t + 1, pat) != nil)
ok = 1;
}
free(s);
return ok;
}
static int
addrsearch(Maddr *a, char *s)
{
char *ok, *addr;
for(; a != nil; a = a->next){
addr = maddrstr(a);
ok = cistrstr(addr, s);
free(addr);
if(ok != nil)
return 1;
}
return 0;
}
static int
datecmp(char *date, Search *s)
{
Tm tm;
date2tm(&tm, date);
if(tm.year < s->year)
return -1;
if(tm.year > s->year)
return 1;
if(tm.mon < s->mon)
return -1;
if(tm.mon > s->mon)
return 1;
if(tm.mday < s->mday)
return -1;
if(tm.mday > s->mday)
return 1;
return 0;
}
enum{
Simp = 0,
Sinfo = 1<<0,
Sbody = 1<<2,
};
int
searchld(Search *s)
{
int r;
for(r = 0; (r & Sbody) == 0 && s; s = s->next)
switch(s->key){
case SKall:
case SKanswered:
case SKdeleted:
case SKdraft:
case SKflagged:
case SKkeyword:
case SKnew:
case SKold:
case SKrecent:
case SKseen:
case SKunanswered:
case SKundeleted:
case SKundraft:
case SKunflagged:
case SKunkeyword:
case SKunseen:
case SKuid:
case SKset:
break;
case SKlarger:
case SKsmaller:
case SKbcc:
case SKcc:
case SKfrom:
case SKto:
case SKsubject:
case SKbefore:
case SKon:
case SKsince:
case SKsentbefore:
case SKsenton:
case SKsentsince:
r = Sinfo;
break;
case SKheader:
if(cistrcmp(s->hdr, "message-id") == 0)
r = Sinfo;
else
r = Sbody;
break;
case SKbody:
break; /* msgstruct doesn't do us any good */
case SKtext:
default:
r = Sbody;
break;
case SKnot:
r = searchld(s->left);
break;
case SKor:
r = searchld(s->left) | searchld(s->right);
break;
}
return 0;
}
/* important speed hack for apple mail */
int
msgidsearch(char *s, char *hdr)
{
char c;
int l, r;
l = strlen(s);
c = 0;
if(s[0] == '<' && s[l-1] == '>'){
l -= 2;
s += 1;
c = s[l-1];
}
r = hdr && strstr(s, hdr) != nil;
if(c)
s[l-1] = c;
return r;
}
/*
* free to exit, parseerr, since called before starting any client reply
*
* the header and envelope searches should convert mime character set escapes.
*/
int
searchmsg(Msg *m, Search *s, int ld)
{
uint ok, id;
Msgset *ms;
if(m->expunged)
return 0;
if(ld & Sbody){
if(!msgstruct(m, 1))
return 0;
}else if (ld & Sinfo){
if(!msginfo(m))
return 0;
}
for(ok = 1; ok && s != nil; s = s->next){
switch(s->key){
default:
ok = 0;
break;
case SKnot:
ok = !searchmsg(m, s->left, ld);
break;
case SKor:
ok = searchmsg(m, s->left, ld) || searchmsg(m, s->right, ld);
break;
case SKall:
ok = 1;
break;
case SKanswered:
ok = (m->flags & Fanswered) == Fanswered;
break;
case SKdeleted:
ok = (m->flags & Fdeleted) == Fdeleted;
break;
case SKdraft:
ok = (m->flags & Fdraft) == Fdraft;
break;
case SKflagged:
ok = (m->flags & Fflagged) == Fflagged;
break;
case SKkeyword:
ok = (m->flags & s->num) == s->num;
break;
case SKnew:
ok = (m->flags & (Frecent|Fseen)) == Frecent;
break;
case SKold:
ok = (m->flags & Frecent) != Frecent;
break;
case SKrecent:
ok = (m->flags & Frecent) == Frecent;
break;
case SKseen:
ok = (m->flags & Fseen) == Fseen;
break;
case SKunanswered:
ok = (m->flags & Fanswered) != Fanswered;
break;
case SKundeleted:
ok = (m->flags & Fdeleted) != Fdeleted;
break;
case SKundraft:
ok = (m->flags & Fdraft) != Fdraft;
break;
case SKunflagged:
ok = (m->flags & Fflagged) != Fflagged;
break;
case SKunkeyword:
ok = (m->flags & s->num) != s->num;
break;
case SKunseen:
ok = (m->flags & Fseen) != Fseen;
break;
case SKlarger:
ok = msgsize(m) > s->num;
break;
case SKsmaller:
ok = msgsize(m) < s->num;
break;
case SKbcc:
ok = addrsearch(m->bcc, s->s);
break;
case SKcc:
ok = addrsearch(m->cc, s->s);
break;
case SKfrom:
ok = addrsearch(m->from, s->s);
break;
case SKto:
ok = addrsearch(m->to, s->s);
break;
case SKsubject:
ok = cistrstr(m->info[Isubject], s->s) != nil;
break;
case SKbefore:
ok = datecmp(m->info[Iunixdate], s) < 0;
break;
case SKon:
ok = datecmp(m->info[Iunixdate], s) == 0;
break;
case SKsince:
ok = datecmp(m->info[Iunixdate], s) > 0;
break;
case SKsentbefore:
ok = datecmp(m->info[Idate], s) < 0;
break;
case SKsenton:
ok = datecmp(m->info[Idate], s) == 0;
break;
case SKsentsince:
ok = datecmp(m->info[Idate], s) > 0;
break;
case SKuid:
id = m->uid;
goto set;
case SKset:
id = m->seq;
set:
for(ms = s->set; ms != nil; ms = ms->next)
if(id >= ms->from && id <= ms->to)
break;
ok = ms != nil;
break;
case SKheader:
if(cistrcmp(s->hdr, "message-id") == 0)
ok = msgidsearch(s->s, m->info[Imessageid]);
else
ok = headersearch(m, s->hdr, s->s);
break;
case SKbody:
case SKtext:
if(s->key == SKtext && cistrstr(m->head.buf, s->s)){
ok = 1;
break;
}
ok = filesearch(m, "body", s->s);
break;
}
}
return ok;
}