#include <unistd.h>

#include "buffer.h"
#include "cdbread.h"
#include "logmsg.h"
#include "stralloc.h"

#define WHO "printmaillist"

static void badformat()
{
  logmsg(WHO, 100, FATAL, "bad database format");
}

static void nomem()
{
  logmsg(WHO, 111, FATAL, "out of memory");
}

static void getch(char *ch)
{
  int r;
  r = buffer_get(buffer_0small, ch, 1);
  if (r == -1) logmsg(WHO, 111, FATAL, "unable to read input");
  if (r == 0) badformat();
}

static void out(char *ch)
{
  if (buffer_put(buffer_1small, ch, 1) == -1) logmsg(WHO, 111, FATAL, "unable to write output");
}

static void printbuf(char *buf)
{
  while (*buf) out(buf++);
}

static void printsafe(char *buf, int len)
{
  char ch;

  while (len) {
    ch = *buf;
    if ((ch <= 32) || (ch == ',') || (ch == ':') || (ch == ';') || (ch == '\\') || (ch == '#'))
      out("\\");
    out(&ch);
    ++buf;
    --len;
  }
}

stralloc key = {0};
stralloc data = {0};

int main()
{
  uint32 eod;
  uint32 pos;
  uint32 klen;
  uint32 dlen;
  char buf[8];
  char ch;
  int i;
  int j;

  for (i = 0; i < 4; ++i) getch(buf + i);
  eod = cdb_unpack(buf);

  for (i = 4; i < 2048; ++i) getch(&ch);

  pos = 2048;
  while (pos < eod) {
    if (eod - pos < 8) badformat();
    pos += 8;
    for (i = 0; i < 8; ++i) getch(buf + i);
    klen = cdb_unpack(buf);
    dlen = cdb_unpack(buf + 4);

    if (!stralloc_copys(&key, "")) nomem();
    if (eod - pos < klen) badformat();
    pos += klen;
    while (klen) {
      --klen;
      getch(&ch);
      if (!stralloc_append(&key, &ch)) nomem();
    }

    if (eod - pos < dlen) badformat();
    pos += dlen;
    if (!stralloc_copys(&data, "")) nomem();
    while (dlen) {
      --dlen;
      getch(&ch);
      if (!stralloc_append(&data, &ch)) nomem();
    }

    if (!key.len) badformat();
    if (key.s[0] == '?') {
      printsafe(key.s + 1, key.len - 1);
      printbuf(": ?");
      printsafe(data.s, data.len);
      printbuf(";\n");
    } else if (key.s[0] == ':') {
      printsafe(key.s + 1, key.len - 1);
      printbuf(":\n");

      i = 0;
      for (j = 0; j < data.len; ++j)
        if (!data.s[j]) {
          if ((data.s[i] == '.') || (data.s[i] == '/')) {
            printbuf(", ");
            printsafe(data.s + i, j - i);
            printbuf("\n");
          } else if ((data.s[i] == '|') || (data.s[i] == '!')) {
            printbuf(", ");
            printsafe(data.s + i, j - i);
            printbuf("\n");
          } else if ((data.s[i] == '&') && (j - i < 900)) {
            printbuf(", ");
            printsafe(data.s + i, j - i);
            printbuf("\n");
          } else
            badformat();
          i = j + 1;
        }
      if (i != j) badformat();
      printbuf(";\n");
    } else {
      badformat();
    }
  }

  if (buffer_flush(buffer_1small) == -1) logmsg(WHO, 111, FATAL, "unable to write output");
  _exit(0);
}