[sqlite] Remove obsolete reference version 3.8.7.4.

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

Index: third_party/sqlite/sqlite-src-3080704/tool/showwal.c
diff --git a/third_party/sqlite/sqlite-src-3080704/tool/showwal.c b/third_party/sqlite/sqlite-src-3080704/tool/showwal.c
deleted file mode 100644
index 35810c66a96ff875612068bf179995f43279ff77..0000000000000000000000000000000000000000
--- a/third_party/sqlite/sqlite-src-3080704/tool/showwal.c
+++ /dev/null
@@ -1,596 +0,0 @@
-/*
-** A utility for printing content from a write-ahead log file.
-*/
-#include <stdio.h>
-#include <ctype.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-
-#if !defined(_MSC_VER)
-#include <unistd.h>
-#else
-#include <io.h>
-#endif
-
-#include <stdlib.h>
-#include <string.h>
-
-
-static int pagesize = 1024;     /* Size of a database page */
-static int fd = -1;             /* File descriptor for reading the WAL file */
-static int mxFrame = 0;         /* Last frame */
-static int perLine = 16;        /* HEX elements to print per line */
-
-typedef long long int i64;      /* Datatype for 64-bit integers */
-
-/* Information for computing the checksum */
-typedef struct Cksum Cksum;
-struct Cksum {
-  int bSwap;           /* True to do byte swapping on 32-bit words */
-  unsigned s0, s1;     /* Current checksum value */
-};
-
-/*
-** extract a 32-bit big-endian integer
-*/
-static unsigned int getInt32(const unsigned char *a){
-  unsigned int x = (a[0]<<24) + (a[1]<<16) + (a[2]<<8) + a[3];
-  return x;
-}
-
-/*
-** Swap bytes on a 32-bit unsigned integer
-*/
-static unsigned int swab32(unsigned int x){
-  return (((x)&0x000000FF)<<24) + (((x)&0x0000FF00)<<8)
-         + (((x)&0x00FF0000)>>8)  + (((x)&0xFF000000)>>24);
-}
-
-/* Extend the checksum.  Reinitialize the checksum if bInit is true.
-*/
-static void extendCksum(
-  Cksum *pCksum,
-  unsigned char *aData,
-  unsigned int nByte,
-  int bInit
-){
-  unsigned int *a32;
-  if( bInit ){
-    int a = 0;
-    *((char*)&a) = 1;
-    if( a==1 ){
-      /* Host is little-endian */
-      pCksum->bSwap = getInt32(aData)!=0x377f0682;
-    }else{
-      /* Host is big-endian */
-      pCksum->bSwap = getInt32(aData)!=0x377f0683;
-    }
-    pCksum->s0 = 0;
-    pCksum->s1 = 0;
-  }
-  a32 = (unsigned int*)aData;
-  while( nByte>0 ){
-    unsigned int x0 = a32[0];
-    unsigned int x1 = a32[1];
-    if( pCksum->bSwap ){
-      x0 = swab32(x0);
-      x1 = swab32(x1);
-    }
-    pCksum->s0 += x0 + pCksum->s1;
-    pCksum->s1 += x1 + pCksum->s0;
-    nByte -= 8;
-    a32 += 2;
-  }
-}
-
-/*
-** Convert the var-int format into i64.  Return the number of bytes
-** in the var-int.  Write the var-int value into *pVal.
-*/
-static int decodeVarint(const unsigned char *z, i64 *pVal){
-  i64 v = 0;
-  int i;
-  for(i=0; i<8; i++){
-    v = (v<<7) + (z[i]&0x7f);
-    if( (z[i]&0x80)==0 ){ *pVal = v; return i+1; }
-  }
-  v = (v<<8) + (z[i]&0xff);
-  *pVal = v;
-  return 9;
-}
-
-/* Report an out-of-memory error and die.
-*/
-static void out_of_memory(void){
-  fprintf(stderr,"Out of memory...\n");
-  exit(1);
-}
-
-/*
-** Read content from the file.
-**
-** Space to hold the content is obtained from malloc() and needs to be
-** freed by the caller.
-*/
-static unsigned char *getContent(int ofst, int nByte){
-  unsigned char *aData;
-  aData = malloc(nByte);
-  if( aData==0 ) out_of_memory();
-  lseek(fd, ofst, SEEK_SET);
-  read(fd, aData, nByte);
-  return aData;
-}
-
-/*
-** Print a range of bytes as hex and as ascii.
-*/
-static void print_byte_range(
-  int ofst,              /* First byte in the range of bytes to print */
-  int nByte,             /* Number of bytes to print */
-  unsigned char *aData,  /* Content to print */
-  int printOfst          /* Add this amount to the index on the left column */
-){
-  int i, j;
-  const char *zOfstFmt;
-
-  if( ((printOfst+nByte)&~0xfff)==0 ){
-    zOfstFmt = " %03x: ";
-  }else if( ((printOfst+nByte)&~0xffff)==0 ){
-    zOfstFmt = " %04x: ";
-  }else if( ((printOfst+nByte)&~0xfffff)==0 ){
-    zOfstFmt = " %05x: ";
-  }else if( ((printOfst+nByte)&~0xffffff)==0 ){
-    zOfstFmt = " %06x: ";
-  }else{
-    zOfstFmt = " %08x: ";
-  }
-
-  for(i=0; i<nByte; i += perLine){
-    fprintf(stdout, zOfstFmt, i+printOfst);
-    for(j=0; j<perLine; j++){
-      if( i+j>nByte ){
-        fprintf(stdout, "   ");
-      }else{
-        fprintf(stdout,"%02x ", aData[i+j]);
-      }
-    }
-    for(j=0; j<perLine; j++){
-      if( i+j>nByte ){
-        fprintf(stdout, " ");
-      }else{
-        fprintf(stdout,"%c", isprint(aData[i+j]) ? aData[i+j] : '.');
-      }
-    }
-    fprintf(stdout,"\n");
-  }
-}
-
-/* Print a line of decode output showing a 4-byte integer.
-*/
-static void print_decode_line(
-  unsigned char *aData,      /* Content being decoded */
-  int ofst, int nByte,       /* Start and size of decode */
-  int asHex,                 /* If true, output value as hex */
-  const char *zMsg           /* Message to append */
-){
-  int i, j;
-  int val = aData[ofst];
-  char zBuf[100];
-  sprintf(zBuf, " %03x: %02x", ofst, aData[ofst]);
-  i = (int)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 += (int)strlen(&zBuf[i]);
-  }
-  if( asHex ){
-    sprintf(&zBuf[i], "  0x%08x", val);
-  }else{
-    sprintf(&zBuf[i], "   %9d", val);
-  }
-  printf("%s  %s\n", zBuf, zMsg);
-}
-
-/*
-** Print an entire page of content as hex
-*/
-static void print_frame(int iFrame){
-  int iStart;
-  unsigned char *aData;
-  iStart = 32 + (iFrame-1)*(pagesize+24);
-  fprintf(stdout, "Frame %d:   (offsets 0x%x..0x%x)\n",
-          iFrame, iStart, iStart+pagesize+24);
-  aData = getContent(iStart, pagesize+24);
-  print_decode_line(aData, 0, 4, 0, "Page number");
-  print_decode_line(aData, 4, 4, 0, "DB size, or 0 for non-commit");
-  print_decode_line(aData, 8, 4, 1, "Salt-1");
-  print_decode_line(aData,12, 4, 1, "Salt-2");
-  print_decode_line(aData,16, 4, 1, "Checksum-1");
-  print_decode_line(aData,20, 4, 1, "Checksum-2");
-  print_byte_range(iStart+24, pagesize, aData+24, 0);
-  free(aData);
-}
-
-/*
-** Summarize a single frame on a single line.
-*/
-static void print_oneline_frame(int iFrame, Cksum *pCksum){
-  int iStart;
-  unsigned char *aData;
-  unsigned int s0, s1;
-  iStart = 32 + (iFrame-1)*(pagesize+24);
-  aData = getContent(iStart, 24);
-  extendCksum(pCksum, aData, 8, 0);
-  extendCksum(pCksum, getContent(iStart+24, pagesize), pagesize, 0);
-  s0 = getInt32(aData+16);
-  s1 = getInt32(aData+20);
-  fprintf(stdout, "Frame %4d: %6d %6d 0x%08x,%08x 0x%08x,%08x %s\n",
-          iFrame, 
-          getInt32(aData),
-          getInt32(aData+4),
-          getInt32(aData+8),
-          getInt32(aData+12),
-          s0,
-          s1,
-          (s0==pCksum->s0 && s1==pCksum->s1) ? "" : "cksum-fail"
-  );
-
-  /* Reset the checksum so that a single frame checksum failure will not
-  ** cause all subsequent frames to also show a failure. */
-  pCksum->s0 = s0;
-  pCksum->s1 = s1;
-  free(aData);
-}
-
-/*
-** Decode the WAL header.
-*/
-static void print_wal_header(Cksum *pCksum){
-  unsigned char *aData;
-  aData = getContent(0, 32);
-  if( pCksum ){
-    extendCksum(pCksum, aData, 24, 1);
-    printf("Checksum byte order: %s\n", pCksum->bSwap ? "swapped" : "native");
-  }
-  printf("WAL Header:\n");
-  print_decode_line(aData, 0, 4,1,"Magic.  0x377f0682 (le) or 0x377f0683 (be)");
-  print_decode_line(aData, 4, 4, 0, "File format");
-  print_decode_line(aData, 8, 4, 0, "Database page size");
-  print_decode_line(aData, 12,4, 0, "Checkpoint sequence number");
-  print_decode_line(aData, 16,4, 1, "Salt-1");
-  print_decode_line(aData, 20,4, 1, "Salt-2");
-  print_decode_line(aData, 24,4, 1, "Checksum-1");
-  print_decode_line(aData, 28,4, 1, "Checksum-2");
-  if( pCksum ){
-    if( pCksum->s0!=getInt32(aData+24) ){
-      printf("**** cksum-1 mismatch: 0x%08x\n", pCksum->s0);
-    }
-    if( pCksum->s1!=getInt32(aData+28) ){
-      printf("**** cksum-2 mismatch: 0x%08x\n", pCksum->s1);
-    }
-  }
-  free(aData);
-}
-/*
-** Describe cell content.
-*/
-static i64 describeContent(
-  unsigned char *a,       /* Cell content */
-  i64 nLocal,             /* Bytes in a[] */
-  char *zDesc             /* Write description here */
-){
-  int nDesc = 0;
-  int n, j;
-  i64 i, x, v;
-  const unsigned char *pData;
-  const unsigned char *pLimit;
-  char sep = ' ';
-
-  pLimit = &a[nLocal];
-  n = decodeVarint(a, &x);
-  pData = &a[x];
-  a += n;
-  i = x - n;
-  while( i>0 && pData<=pLimit ){
-    n = decodeVarint(a, &x);
-    a += n;
-    i -= n;
-    nLocal -= n;
-    zDesc[0] = sep;
-    sep = ',';
-    nDesc++;
-    zDesc++;
-    if( x==0 ){
-      sprintf(zDesc, "*");     /* NULL is a "*" */
-    }else if( x>=1 && x<=6 ){
-      v = (signed char)pData[0];
-      pData++;
-      switch( x ){
-        case 6:  v = (v<<16) + (pData[0]<<8) + pData[1];  pData += 2;
-        case 5:  v = (v<<16) + (pData[0]<<8) + pData[1];  pData += 2;
-        case 4:  v = (v<<8) + pData[0];  pData++;
-        case 3:  v = (v<<8) + pData[0];  pData++;
-        case 2:  v = (v<<8) + pData[0];  pData++;
-      }
-      sprintf(zDesc, "%lld", v);
-    }else if( x==7 ){
-      sprintf(zDesc, "real");
-      pData += 8;
-    }else if( x==8 ){
-      sprintf(zDesc, "0");
-    }else if( x==9 ){
-      sprintf(zDesc, "1");
-    }else if( x>=12 ){
-      i64 size = (x-12)/2;
-      if( (x&1)==0 ){
-        sprintf(zDesc, "blob(%lld)", size);
-      }else{
-        sprintf(zDesc, "txt(%lld)", size);
-      }
-      pData += size;
-    }
-    j = (int)strlen(zDesc);
-    zDesc += j;
-    nDesc += j;
-  }
-  return nDesc;
-}
-
-/*
-** Compute the local payload size given the total payload size and
-** the page size.
-*/
-static i64 localPayload(i64 nPayload, char cType){
-  i64 maxLocal;
-  i64 minLocal;
-  i64 surplus;
-  i64 nLocal;
-  if( cType==13 ){
-    /* Table leaf */
-    maxLocal = pagesize-35;
-    minLocal = (pagesize-12)*32/255-23;
-  }else{
-    maxLocal = (pagesize-12)*64/255-23;
-    minLocal = (pagesize-12)*32/255-23;
-  }
-  if( nPayload>maxLocal ){
-    surplus = minLocal + (nPayload-minLocal)%(pagesize-4);
-    if( surplus<=maxLocal ){
-      nLocal = surplus;
-    }else{
-      nLocal = minLocal;
-    }
-  }else{
-    nLocal = nPayload;
-  }
-  return nLocal;
-}
-
-/*
-** Create a description for a single cell.
-**
-** The return value is the local cell size.
-*/
-static i64 describeCell(
-  unsigned char cType,    /* Page type */
-  unsigned char *a,       /* Cell content */
-  int showCellContent,    /* Show cell content if true */
-  char **pzDesc           /* Store description here */
-){
-  int i;
-  i64 nDesc = 0;
-  int n = 0;
-  int leftChild;
-  i64 nPayload;
-  i64 rowid;
-  i64 nLocal;
-  static char zDesc[1000];
-  i = 0;
-  if( cType<=5 ){
-    leftChild = ((a[0]*256 + a[1])*256 + a[2])*256 + a[3];
-    a += 4;
-    n += 4;
-    sprintf(zDesc, "lx: %d ", leftChild);
-    nDesc = strlen(zDesc);
-  }
-  if( cType!=5 ){
-    i = decodeVarint(a, &nPayload);
-    a += i;
-    n += i;
-    sprintf(&zDesc[nDesc], "n: %lld ", nPayload);
-    nDesc += strlen(&zDesc[nDesc]);
-    nLocal = localPayload(nPayload, cType);
-  }else{
-    nPayload = nLocal = 0;
-  }
-  if( cType==5 || cType==13 ){
-    i = decodeVarint(a, &rowid);
-    a += i;
-    n += i;
-    sprintf(&zDesc[nDesc], "r: %lld ", rowid);
-    nDesc += strlen(&zDesc[nDesc]);
-  }
-  if( nLocal<nPayload ){
-    int ovfl;
-    unsigned char *b = &a[nLocal];
-    ovfl = ((b[0]*256 + b[1])*256 + b[2])*256 + b[3];
-    sprintf(&zDesc[nDesc], "ov: %d ", ovfl);
-    nDesc += strlen(&zDesc[nDesc]);
-    n += 4;
-  }
-  if( showCellContent && cType!=5 ){
-    nDesc += describeContent(a, nLocal, &zDesc[nDesc-1]);
-  }
-  *pzDesc = zDesc;
-  return nLocal+n;
-}
-
-/*
-** Decode a btree page
-*/
-static void decode_btree_page(
-  unsigned char *a,   /* Content of the btree page to be decoded */
-  int pgno,           /* Page number */
-  int hdrSize,        /* Size of the page1-header in bytes */
-  const char *zArgs   /* Flags to control formatting */
-){
-  const char *zType = "unknown";
-  int nCell;
-  int i, j;
-  int iCellPtr;
-  int showCellContent = 0;
-  int showMap = 0;
-  char *zMap = 0;
-  switch( a[0] ){
-    case 2:  zType = "index interior node";  break;
-    case 5:  zType = "table interior node";  break;
-    case 10: zType = "index leaf";           break;
-    case 13: zType = "table leaf";           break;
-  }
-  while( zArgs[0] ){
-    switch( zArgs[0] ){
-      case 'c': showCellContent = 1;  break;
-      case 'm': showMap = 1;          break;
-    }
-    zArgs++;
-  }
-  printf("Decode of btree page %d:\n", pgno);
-  print_decode_line(a, 0, 1, 0, zType);
-  print_decode_line(a, 1, 2, 0, "Offset to first freeblock");
-  print_decode_line(a, 3, 2, 0, "Number of cells on this page");
-  nCell = a[3]*256 + a[4];
-  print_decode_line(a, 5, 2, 0, "Offset to cell content area");
-  print_decode_line(a, 7, 1, 0, "Fragmented byte count");
-  if( a[0]==2 || a[0]==5 ){
-    print_decode_line(a, 8, 4, 0, "Right child");
-    iCellPtr = 12;
-  }else{
-    iCellPtr = 8;
-  }
-  if( nCell>0 ){
-    printf(" key: lx=left-child n=payload-size r=rowid\n");
-  }
-  if( showMap ){
-    zMap = malloc(pagesize);
-    memset(zMap, '.', pagesize);
-    memset(zMap, '1', hdrSize);
-    memset(&zMap[hdrSize], 'H', iCellPtr);
-    memset(&zMap[hdrSize+iCellPtr], 'P', 2*nCell);
-  }
-  for(i=0; i<nCell; i++){
-    int cofst = iCellPtr + i*2;
-    char *zDesc;
-    i64 n;
-
-    cofst = a[cofst]*256 + a[cofst+1];
-    n = describeCell(a[0], &a[cofst-hdrSize], showCellContent, &zDesc);
-    if( showMap ){
-      char zBuf[30];
-      memset(&zMap[cofst], '*', (size_t)n);
-      zMap[cofst] = '[';
-      zMap[cofst+n-1] = ']';
-      sprintf(zBuf, "%d", i);
-      j = (int)strlen(zBuf);
-      if( j<=n-2 ) memcpy(&zMap[cofst+1], zBuf, j);
-    }
-    printf(" %03x: cell[%d] %s\n", cofst, i, zDesc);
-  }
-  if( showMap ){
-    for(i=0; i<pagesize; i+=64){
-      printf(" %03x: %.64s\n", i, &zMap[i]);
-    }
-    free(zMap);
-  }  
-}
-
-int main(int argc, char **argv){
-  struct stat sbuf;
-  unsigned char zPgSz[4];
-  if( argc<2 ){
-    fprintf(stderr,"Usage: %s FILENAME ?PAGE? ...\n", argv[0]);
-    exit(1);
-  }
-  fd = open(argv[1], O_RDONLY);
-  if( fd<0 ){
-    fprintf(stderr,"%s: can't open %s\n", argv[0], argv[1]);
-    exit(1);
-  }
-  zPgSz[0] = 0;
-  zPgSz[1] = 0;
-  lseek(fd, 8, SEEK_SET);
-  read(fd, zPgSz, 4);
-  pagesize = zPgSz[1]*65536 + zPgSz[2]*256 + zPgSz[3];
-  if( pagesize==0 ) pagesize = 1024;
-  printf("Pagesize: %d\n", pagesize);
-  fstat(fd, &sbuf);
-  if( sbuf.st_size<32 ){
-    printf("file too small to be a WAL\n");
-    return 0;
-  }
-  mxFrame = (sbuf.st_size - 32)/(pagesize + 24);
-  printf("Available pages: 1..%d\n", mxFrame);
-  if( argc==2 ){
-    int i;
-    Cksum x;
-    print_wal_header(&x);
-    for(i=1; i<=mxFrame; i++){
-      print_oneline_frame(i, &x);
-    }
-  }else{
-    int i;
-    for(i=2; i<argc; i++){
-      int iStart, iEnd;
-      char *zLeft;
-      if( strcmp(argv[i], "header")==0 ){
-        print_wal_header(0);
-        continue;
-      }
-      if( !isdigit(argv[i][0]) ){
-        fprintf(stderr, "%s: unknown option: [%s]\n", argv[0], argv[i]);
-        continue;
-      }
-      iStart = strtol(argv[i], &zLeft, 0);
-      if( zLeft && strcmp(zLeft,"..end")==0 ){
-        iEnd = mxFrame;
-      }else if( zLeft && zLeft[0]=='.' && zLeft[1]=='.' ){
-        iEnd = strtol(&zLeft[2], 0, 0);
-      }else if( zLeft && zLeft[0]=='b' ){
-        int ofst, nByte, hdrSize;
-        unsigned char *a;
-        if( iStart==1 ){
-          hdrSize = 100;
-          ofst = hdrSize = 100;
-          nByte = pagesize-100;
-        }else{
-          hdrSize = 0;
-          ofst = (iStart-1)*pagesize;
-          nByte = pagesize;
-        }
-        ofst = 32 + hdrSize + (iStart-1)*(pagesize+24) + 24;
-        a = getContent(ofst, nByte);
-        decode_btree_page(a, iStart, hdrSize, zLeft+1);
-        free(a);
-        continue;
-      }else{
-        iEnd = iStart;
-      }
-      if( iStart<1 || iEnd<iStart || iEnd>mxFrame ){
-        fprintf(stderr,
-          "Page argument should be LOWER?..UPPER?.  Range 1 to %d\n",
-          mxFrame);
-        exit(1);
-      }
-      while( iStart<=iEnd ){
-        print_frame(iStart);
-        iStart++;
-      }
-    }
-  }
-  close(fd);
-  return 0;
-}