From: drh <drh@noemail.net>
Date: Fri, 31 Oct 2014 10:31:59 +0000 (+0000)
Subject: Add the "varint.c" utility program in the tool directory.
X-Git-Tag: version-3.8.8~199
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=9c0153457af66ca84768c08472f7424f7e6711d0;p=thirdparty%2Fsqlite.git

Add the "varint.c" utility program in the tool directory.

FossilOrigin-Name: ea5d56be5fe14934e4dbe9c17d46b058f487a231
---

diff --git a/manifest b/manifest
index 2496dc7f00..2c4f7bf41f 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Remove\san\sunnecessary\sbranch\sfrom\sbalance_nonroot().
-D 2014-10-31T02:51:41.215
+C Add\sthe\s"varint.c"\sutility\sprogram\sin\sthe\stool\sdirectory.
+D 2014-10-31T10:31:59.052
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
 F Makefile.in cf57f673d77606ab0f2d9627ca52a9ba1464146a
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -1204,12 +1204,13 @@ F tool/stack_usage.tcl f8e71b92cdb099a147dad572375595eae55eca43
 F tool/symbols-mingw.sh 4dbcea7e74768305384c9fd2ed2b41bbf9f0414d
 F tool/symbols.sh fec58532668296d7c7dc48be9c87f75ccdb5814f
 F tool/tostr.awk e75472c2f98dd76e06b8c9c1367f4ab07e122d06
+F tool/varint.c 5d94cb5003db9dbbcbcc5df08d66f16071aee003
 F tool/vdbe-compress.tcl 5926c71f9c12d2ab73ef35c29376e756eb68361c
 F tool/vdbe_profile.tcl 67746953071a9f8f2f668b73fe899074e2c6d8c1
 F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
 F tool/warnings.sh 0abfd78ceb09b7f7c27c688c8e3fe93268a13b32
 F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
-P 69c3924fe834a78d4a8d86833626bf5f68e33a3a
-R 85b30d88694d9feacf26ae3f80208908
+P 9fc7c88e3f5221883aa6eafbf8af3be94db0c299
+R 932c8189456e662bc00860a65a53ebcf
 U drh
-Z 7bc5c33b6cb165c738435440761728db
+Z 653e5ed37198e17f610045be3bfdae23
diff --git a/manifest.uuid b/manifest.uuid
index d59874b337..337c7347f8 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-9fc7c88e3f5221883aa6eafbf8af3be94db0c299
\ No newline at end of file
+ea5d56be5fe14934e4dbe9c17d46b058f487a231
\ No newline at end of file
diff --git a/tool/varint.c b/tool/varint.c
new file mode 100644
index 0000000000..f4a51118b4
--- /dev/null
+++ b/tool/varint.c
@@ -0,0 +1,123 @@
+/*
+** A utility program to translate SQLite varints into decimal and decimal
+** integers into varints.
+*/
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#if defined(_MSC_VER) || defined(__BORLANDC__)
+  typedef __int64 i64;
+  typedef unsigned __int64 u64;
+#else
+  typedef long long int i64;
+  typedef unsigned long long int u64;
+#endif
+
+static int hexValue(char c){
+  if( c>='0' && c<='9' ) return c - '0';
+  if( c>='a' && c<='f' ) return c - 'a' + 10;
+  if( c>='A' && c<='F' ) return c - 'A' + 10;
+  return -1;
+}
+
+static char toHex(unsigned char c){
+  return "0123456789abcdef"[c&0xf];
+}
+
+static int putVarint(unsigned char *p, u64 v){
+  int i, j, n;
+  unsigned char buf[10];
+  if( v & (((u64)0xff000000)<<32) ){
+    p[8] = (unsigned char)v;
+    v >>= 8;
+    for(i=7; i>=0; i--){
+      p[i] = (unsigned char)((v & 0x7f) | 0x80);
+      v >>= 7;
+    }
+    return 9;
+  }    
+  n = 0;
+  do{
+    buf[n++] = (unsigned char)((v & 0x7f) | 0x80);
+    v >>= 7;
+  }while( v!=0 );
+  buf[0] &= 0x7f;
+  for(i=0, j=n-1; j>=0; j--, i++){
+    p[i] = buf[j];
+  }
+  return n;
+}
+
+
+int main(int argc, char **argv){
+  int i;
+  u64 x;
+  u64 uX = 0;
+  i64 iX;
+  int n;
+  unsigned char zHex[20];
+
+  if( argc==1 ){
+    fprintf(stderr, 
+         "Usage:\n"
+         "  %s HH HH HH ...   Convert varint to decimal\n"
+         "  %s DDDDD          Convert decimal to varint\n"
+         "                    Add '+' or '-' before DDDDD to disambiguate.\n",
+         argv[0], argv[0]);
+    exit(1);
+  }
+  if( argc>2 
+   || (strlen(argv[1])==2 && hexValue(argv[1][0])>=0 && hexValue(argv[1][1])>=0)
+  ){
+    /* Hex to decimal */
+    for(i=1; i<argc && i<9; i++){
+      if( strlen(argv[i])!=2 ){
+        fprintf(stderr, "Not a hex byte: %s\n", argv[i]);
+        exit(1);
+      }
+      x = (hexValue(argv[i][0])<<4) + hexValue(argv[i][1]);
+      uX = (uX<<7) + (x&0x7f);
+      if( (x&0x80)==0 ) break;
+    }
+    if( i==9 && i<argc ){
+      if( strlen(argv[i])!=2 ){
+        fprintf(stderr, "Not a hex byte: %s\n", argv[i]);
+        exit(1);
+      }
+      x = (hexValue(argv[i][0])<<4) + hexValue(argv[i][1]);
+      uX = (uX<<8) + x;
+    }
+    i++;
+    if( i<argc ){
+      fprintf(stderr, "Extra arguments: %s...\n", argv[i]);
+      exit(1);
+    }
+  }else{
+    char *z = argv[1];
+    int sign = 1;
+    if( z[0]=='+' ) z++;
+    else if( z[0]=='-' ){ z++; sign = -1; }
+    uX = 0;
+    while( z[0] ){
+      if( z[0]<'0' || z[0]>'9' ){
+        fprintf(stderr, "Not a decimal number: %s", argv[1]);
+        exit(1);
+      }
+      uX = uX*10 + z[0] - '0';
+      z++;
+    }
+    if( sign<0 ){
+      memcpy(&iX, &uX, 8);
+      iX = -iX;
+      memcpy(&uX, &iX, 8);
+    }
+  }
+  n = putVarint(zHex, uX);
+  printf("%lld =", (i64)uX);
+  for(i=0; i<n; i++){
+    printf(" %c%c", toHex(zHex[i]>>4), toHex(zHex[i]&0x0f));
+  }
+  printf("\n");
+  return 0;
+}