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
  14         if((fd = revlogopentemp(changelog, rev)) < 0)
  15                 return nil;
  16
  17         seek(fd, 0, 2);
  18         write(fd, "\n", 1);
  19         seek(fd, 0, 0);
  20
  21         ri = malloc(sizeof(*ri));
  22         memset(ri, 0, sizeof(*ri));
  23
  24         memmove(ri->chash, changelog->map[rev].hash, HASHSZ);
  25
  26         line = 0;
  27         inmsg = 0;
  28         p = buf;
  29         e = buf + BUFSZ;
  30         while((n = read(fd, p, e - p)) > 0){
  31                 p += n;
  32                 while((p > buf) && (e = memchr(buf, '\n', p - buf))){
  33                         *e++ = 0;
  34
  35                         switch(line++){
  36                         case 0:
  37                                 strhash(buf, ri->mhash);
  38                                 break;
  39                         case 1:
  40                                 ri->who = strdup(buf);
  41                                 break;
  42                         case 2:
  43                                 ri->when = strtol(buf, nil, 10);
  44                                 break;
  45                         default:
  46                                 if(!inmsg){
  47                                         if(*buf == 0)
  48                                                 inmsg = 1;
  49                                 } else {
  50                                         n = ri->why ? strlen(ri->why) : 0;
  51                                         ri->why = realloc(ri->why, n + strlen(buf)+1);
  52                                         strcpy(ri->why + n, buf);
  53                                 }
  54                         }
  55                         p -= e - buf;
  56                         if(p > buf)
  57                                 memmove(buf, e, p - buf);
  58                 }
  59                 e = buf + BUFSZ;
  60         }
  61         close(fd);
  62
  63         return ri;
  64 }