/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/*
** File:        append.c
** Description: Testing File writes where PR_APPEND was used on open
**
** append attempts to verify that a file opened with PR_APPEND
** will always append to the end of file, regardless where the
** current file pointer is positioned. To do this, PR_Seek() is
** called before each write with the position set to beginning of
** file. Subsequent writes should always append.
** The file is read back, summing the integer data written to the
** file. If the expected result is equal, the test passes.
**
** See BugSplat: 4090
*/
#include "plgetopt.h"
#include "nspr.h"

#include <stdio.h>
#include <stdlib.h>

PRIntn debug = 0;
PRIntn verbose = 0;
PRBool failedAlready = PR_FALSE;
const PRInt32 addedBytes = 1000;
const PRInt32 buf = 1; /* constant written to fd, addedBytes times */
PRInt32 inBuf;         /* read it back into here */

int main(int argc, char** argv) {
  PRStatus rc;
  PRInt32 rv;
  PRFileDesc* fd;
  PRIntn i;
  PRInt32 sum = 0;

  { /* Get command line options */
    PLOptStatus os;
    PLOptState* opt = PL_CreateOptState(argc, argv, "vd");

    while (PL_OPT_EOL != (os = PL_GetNextOpt(opt))) {
      if (PL_OPT_BAD == os) {
        continue;
      }
      switch (opt->option) {
        case 'd': /* debug */
          debug = 1;
          break;
        case 'v': /* verbose */
          verbose = 1;
          break;
        default:
          break;
      }
    }
    PL_DestroyOptState(opt);
  } /* end block "Get command line options" */
  /* ---------------------------------------------------------------------- */
  fd = PR_Open("./tmp-nsprAppend",
               (PR_APPEND | PR_CREATE_FILE | PR_TRUNCATE | PR_WRONLY), 0666);
  if (NULL == fd) {
    if (debug) {
      printf("PR_Open() failed for writing: %d\n", PR_GetError());
    }
    failedAlready = PR_TRUE;
    goto Finished;
  }

  for (i = 0; i < addedBytes; i++) {
    rv = PR_Write(fd, &buf, sizeof(buf));
    if (sizeof(buf) != rv) {
      if (debug) {
        printf("PR_Write() failed: %d\n", PR_GetError());
      }
      failedAlready = PR_TRUE;
      goto Finished;
    }
    rv = PR_Seek(fd, 0, PR_SEEK_SET);
    if (-1 == rv) {
      if (debug) {
        printf("PR_Seek() failed: %d\n", PR_GetError());
      }
      failedAlready = PR_TRUE;
      goto Finished;
    }
  }
  rc = PR_Close(fd);
  if (PR_FAILURE == rc) {
    if (debug) {
      printf("PR_Close() failed after writing: %d\n", PR_GetError());
    }
    failedAlready = PR_TRUE;
    goto Finished;
  }
  /* ---------------------------------------------------------------------- */
  fd = PR_Open("./tmp-nsprAppend", PR_RDONLY, 0);
  if (NULL == fd) {
    if (debug) {
      printf("PR_Open() failed for reading: %d\n", PR_GetError());
    }
    failedAlready = PR_TRUE;
    goto Finished;
  }

  for (i = 0; i < addedBytes; i++) {
    rv = PR_Read(fd, &inBuf, sizeof(inBuf));
    if (sizeof(inBuf) != rv) {
      if (debug) {
        printf("PR_Write() failed: %d\n", PR_GetError());
      }
      failedAlready = PR_TRUE;
      goto Finished;
    }
    sum += inBuf;
  }

  rc = PR_Close(fd);
  if (PR_FAILURE == rc) {
    if (debug) {
      printf("PR_Close() failed after reading: %d\n", PR_GetError());
    }
    failedAlready = PR_TRUE;
    goto Finished;
  }
  if (sum != addedBytes) {
    if (debug) {
      printf("Uh Oh! addedBytes: %d. Sum: %d\n", addedBytes, sum);
    }
    failedAlready = PR_TRUE;
    goto Finished;
  }

  /* ---------------------------------------------------------------------- */
Finished:
  if (debug || verbose) {
    printf("%s\n", (failedAlready) ? "FAILED" : "PASSED");
  }
  return ((failedAlready) ? 1 : 0);
} /* main() */

/* append.c */