mdw@git.distorted.org.uk Git - fastforward/blob - printforward.c

   1 #include "substdio.h"
   2 #include "subfd.h"
   3 #include "strerr.h"
   4 #include "stralloc.h"
   5 #include "cdb.h"
   6
   7 #define FATAL "printmaillist: fatal: "
   8
   9 void badformat()
  10 {
  11   strerr_die2x(100,FATAL,"bad database format");
  12 }
  13 void nomem()
  14 {
  15   strerr_die2x(111,FATAL,"out of memory");
  16 }
  17
  18 void getch(ch)
  19 char *ch;
  20 {
  21   int r;
  22   r = substdio_get(subfdinsmall,ch,1);
  23   if (r == -1)
  24     strerr_die2sys(111,FATAL,"unable to read input: ");
  25   if (r == 0)
  26     badformat();
  27 }
  28
  29 void putch(ch)
  30 char *ch;
  31 {
  32   if (substdio_put(subfdoutsmall,ch,1) == -1)
  33     strerr_die2x(111,FATAL,"unable to write output: ");
  34 }
  35
  36 void print(buf)
  37 char *buf;
  38 {
  39   while (*buf)
  40     putch(buf++);
  41 }
  42
  43 void printsafe(buf,len)
  44 char *buf;
  45 int len;
  46 {
  47   char ch;
  48
  49   while (len) {
  50     ch = *buf;
  51     if ((ch <= 32) || (ch == ',') || (ch == ':') || (ch == ';') || (ch == '\\') || (ch == '#'))
  52       putch("\\");
  53     putch(&ch);
  54     ++buf;
  55     --len;
  56   }
  57 }
  58
  59 stralloc key = {0};
  60 stralloc data = {0};
  61
  62 void main()
  63 {
  64   uint32 eod;
  65   uint32 pos;
  66   uint32 klen;
  67   uint32 dlen;
  68   char buf[8];
  69   char ch;
  70   int i;
  71   int j;
  72
  73   for (i = 0;i < 4;++i) getch(buf + i);
  74   eod = cdb_unpack(buf);
  75
  76   for (i = 4;i < 2048;++i) getch(&ch);
  77
  78   pos = 2048;
  79   while (pos < eod) {
  80     if (eod - pos < 8) badformat();
  81     pos += 8;
  82     for (i = 0;i < 8;++i) getch(buf + i);
  83     klen = cdb_unpack(buf);
  84     dlen = cdb_unpack(buf + 4);
  85
  86     if (!stralloc_copys(&key,"")) nomem();
  87     if (eod - pos < klen) badformat();
  88     pos += klen;
  89     while (klen) {
  90       --klen;
  91       getch(&ch);
  92       if (!stralloc_append(&key,&ch)) nomem();
  93     }
  94
  95     if (eod - pos < dlen) badformat();
  96     pos += dlen;
  97     if (!stralloc_copys(&data,"")) nomem();
  98     while (dlen) {
  99       --dlen;
 100       getch(&ch);
 101       if (!stralloc_append(&data,&ch)) nomem();
 102     }
 103
 104     if (!key.len) badformat();
 105     if (key.s[0] == '?') {
 106       printsafe(key.s + 1,key.len - 1);
 107       print(": ?");
 108       printsafe(data.s,data.len);
 109       print(";\n");
 110     }
 111     else if (key.s[0] == ':') {
 112       printsafe(key.s + 1,key.len - 1);
 113       print(":\n");
 114
 115       i = 0;
 116       for (j = 0;j < data.len;++j)
 117         if (!data.s[j]) {
 118           if ((data.s[i] == '.') || (data.s[i] == '/')) {
 119             print(", ");
 120             printsafe(data.s + i,j - i);
 121             print("\n");
 122           }
 123           else if ((data.s[i] == '|') || (data.s[i] == '!')) {
 124             print(", ");
 125             printsafe(data.s + i,j - i);
 126             print("\n");
 127           }
 128           else if ((data.s[i] == '&') && (j - i < 900)) {
 129             print(", ");
 130             printsafe(data.s + i,j - i);
 131             print("\n");
 132           }
 133           else badformat();
 134           i = j + 1;
 135         }
 136       if (i != j) badformat();
 137       print(";\n");
 138     }
 139     else badformat();
 140   }
 141
 142   if (substdio_flush(subfdoutsmall) == -1)
 143     strerr_die2sys(111,FATAL,"unable to write output: ");
 144   _exit(0);
 145 }