[sqlite] Remove obsolete reference version 3.8.7.4.

third_party/sqlite/sqlite-src-3080704/tool/showjournal.c

-/*
-** A utility for printing an SQLite database journal.
-*/
-#include <stdio.h>
-#include <ctype.h>
-#include <stdlib.h>
-#include <string.h>
-
-/*
-** state information
-*/
-static int pageSize = 1024;
-static int sectorSize = 512;
-static FILE *db = 0;
-static int fileSize = 0;
-static unsigned cksumNonce = 0;
-
-/* Report a memory allocation error */
-static void out_of_memory(void){
-  fprintf(stderr,"Out of memory...\n");
-  exit(1);
-}
-
-/*
-** Read N bytes of memory starting at iOfst into space obtained
-** from malloc().
-*/
-static unsigned char *read_content(int N, int iOfst){
-  int got;
-  unsigned char *pBuf = malloc(N);
-  if( pBuf==0 ) out_of_memory();
-  fseek(db, iOfst, SEEK_SET);
-  got = fread(pBuf, 1, N, db);
-  if( got<0 ){
-    fprintf(stderr, "I/O error reading %d bytes from %d\n", N, iOfst);
-    memset(pBuf, 0, N);
-  }else if( got<N ){
-    fprintf(stderr, "Short read: got only %d of %d bytes from %d\n",
-                     got, N, iOfst);
-    memset(&pBuf[got], 0, N-got);
-  }
-  return pBuf;
-}
-
-/* Print a line of decode output showing a 4-byte integer.
-*/
-static unsigned print_decode_line(
-  const unsigned char *aData,  /* Content being decoded */
-  int ofst, int nByte,         /* Start and size of decode */
-  const char *zMsg             /* Message to append */
-){
-  int i, j;
-  unsigned val = aData[ofst];
-  char zBuf[100];
-  sprintf(zBuf, " %05x: %02x", ofst, aData[ofst]);
-  i = strlen(zBuf);
-  for(j=1; j<4; j++){
-    if( j>=nByte ){
-      sprintf(&zBuf[i], "   ");
-    }else{
-      sprintf(&zBuf[i], " %02x", aData[ofst+j]);
-      val = val*256 + aData[ofst+j];
-    }
-    i += strlen(&zBuf[i]);
-  }
-  sprintf(&zBuf[i], "   %10u", val);
-  printf("%s  %s\n", zBuf, zMsg);
-  return val;
-}
-
-/*
-** Read and print a journal header.  Store key information (page size, etc)
-** in global variables.
-*/
-static unsigned decode_journal_header(int iOfst){
-  unsigned char *pHdr = read_content(64, iOfst);
-  unsigned nPage;
-  printf("Header at offset %d:\n", iOfst);
-  print_decode_line(pHdr, 0, 4, "Header part 1 (3654616569)");
-  print_decode_line(pHdr, 4, 4, "Header part 2 (547447767)");
-  nPage =
-  print_decode_line(pHdr, 8, 4, "page count");
-  cksumNonce =
-  print_decode_line(pHdr, 12, 4, "chksum nonce");
-  print_decode_line(pHdr, 16, 4, "initial database size in pages");
-  sectorSize =
-  print_decode_line(pHdr, 20, 4, "sector size");
-  pageSize =
-  print_decode_line(pHdr, 24, 4, "page size");
-  print_decode_line(pHdr, 28, 4, "zero");
-  print_decode_line(pHdr, 32, 4, "zero");
-  print_decode_line(pHdr, 36, 4, "zero");
-  print_decode_line(pHdr, 40, 4, "zero");
-  free(pHdr);
-  return nPage;
-}
-
-static void print_page(int iOfst){
-  unsigned char *aData;
-  char zTitle[50];
-  aData = read_content(pageSize+8, iOfst);
-  sprintf(zTitle, "page number for page at offset %d", iOfst);
-  print_decode_line(aData-iOfst, iOfst, 4, zTitle);
-  free(aData);
-}
-
-int main(int argc, char **argv){
-  int nPage, cnt;
-  int iOfst;
-  if( argc!=2 ){
-    fprintf(stderr,"Usage: %s FILENAME\n", argv[0]);
-    exit(1);
-  }
-  db = fopen(argv[1], "rb");
-  if( db==0 ){
-    fprintf(stderr,"%s: can't open %s\n", argv[0], argv[1]);
-    exit(1);
-  }
-  fseek(db, 0, SEEK_END);
-  fileSize = ftell(db);
-  printf("journal file size: %d bytes\n", fileSize);
-  fseek(db, 0, SEEK_SET);
-  iOfst = 0;
-  while( iOfst<fileSize ){
-    cnt = nPage = (int)decode_journal_header(iOfst);
-    if( cnt==0 ){
-      cnt = (fileSize - sectorSize)/(pageSize+8);
-    }
-    iOfst += sectorSize;
-    while( cnt && iOfst<fileSize ){
-      print_page(iOfst);
-      iOfst += pageSize+8;
-    }
-    iOfst = (iOfst/sectorSize + 1)*sectorSize;
-  }
-  fclose(db);
-  return 0;
-}