sys/src/cmd/hgfs/info.c

   1 #include <u.h>
   2 #include <libc.h>
   3 #include <thread.h>
   4 #include "dat.h"
   5 #include "fns.h"
   6
   7 Revinfo*
   8 loadrevinfo(Revlog *changelog, int rev)
   9 {
  10         char buf[BUFSZ], *p, *e;
  11         int fd, line, inmsg, n;
  12         Revinfo *ri;
  13         vlong off;
  14
  15         if((fd = revlogopentemp(changelog, rev)) < 0)
  16                 return nil;
  17
  18         seek(fd, 0, 2);
  19         write(fd, "\n", 1);
  20         seek(fd, 0, 0);
  21
  22         ri = malloc(sizeof(*ri));
  23         memset(ri, 0, sizeof(*ri));
  24
  25         memmove(ri->chash, changelog->map[rev].hash, HASHSZ);
  26
  27         off = 0;
  28         line = 0;
  29         inmsg = 0;
  30         p = buf;
  31         e = buf + BUFSZ;
  32         while((n = read(fd, p, e - p)) > 0){
  33                 p += n;
  34                 while((p > buf) && (e = memchr(buf, '\n', p - buf))){
  35                         *e++ = 0;
  36
  37                         switch(line++){
  38                         case 0:
  39                                 hex2hash(buf, ri->mhash);
  40                                 break;
  41                         case 1:
  42                                 ri->who = strdup(buf);
  43                                 break;
  44                         case 2:
  45                                 ri->when = strtol(buf, nil, 10);
  46                                 break;
  47                         case 3:
  48                                 ri->logoff = off;
  49                         default:
  50                                 if(!inmsg){
  51                                         if(*buf == 0){
  52                                                 ri->loglen = off - ri->logoff;
  53                                                 inmsg = 1;
  54                                         }
  55                                 } else {
  56                                         n = ri->why ? strlen(ri->why) : 0;
  57                                         ri->why = realloc(ri->why, n + strlen(buf)+1);
  58                                         strcpy(ri->why + n, buf);
  59                                 }
  60                         }
  61                         n = e - buf;
  62                         p -= n;
  63                         if(p > buf)
  64                                 memmove(buf, e, p - buf);
  65                         off += n;
  66                 }
  67                 e = buf + BUFSZ;
  68         }
  69         close(fd);
  70
  71         return ri;
  72 }