Add a command-line program to tool/ that will check source code files for

the presence of tabs, carriage-returns, whitespace at the ends of lines,
and blank lines at the ends of files.

FossilOrigin-Name: 656a9c8b47d262e0982ad3a35db490e2ff4d856e

manifest

@@ -1,5 +1,5 @@
-C Clarify\sthat\sthe\snumber-of-bytes\sparameter\sto\ssqlite3_bind_blob()\smust\nbe\snon-negative.
-D 2012-08-17T13:44:31.839
+C Add\sa\scommand-line\sprogram\sto\stool/\sthat\swill\scheck\ssource\scode\sfiles\sfor\nthe\spresence\sof\stabs,\scarriage-returns,\swhitespace\sat\sthe\sends\sof\slines,\nand\sblank\slines\sat\sthe\sends\sof\sfiles.
+D 2012-08-20T15:46:08.616
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
 F Makefile.in abd5c10d21d1395f140d9e50ea999df8fa4d6376
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -970,6 +970,7 @@ F test/zeroblob.test caaecfb4f908f7bc086ed238668049f96774d688
 F test/zerodamage.test 0de750389990b1078bab203c712dc3fefd1d8b82
 F tool/build-all-msvc.bat 1a18aa39983ae7354d834bc55a850a54fc007576 x
 F tool/build-shell.sh b64a481901fc9ffe5ca8812a2a9255b6cfb77381
+F tool/checkSpacing.c 7971696f2749897ea3a7fd6431297a607934aa80
 F tool/diffdb.c 7524b1b5df217c20cd0431f6789851a4e0cb191b
 F tool/extract.c 054069d81b095fbdc189a6f5d4466e40380505e2
 F tool/fragck.tcl 5265a95126abcf6ab357f7efa544787e5963f439
@@ -1010,7 +1011,7 @@ F tool/vdbe-compress.tcl d70ea6d8a19e3571d7ab8c9b75cba86d1173ff0f
 F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
 F tool/warnings.sh fbc018d67fd7395f440c28f33ef0f94420226381
 F tool/win/sqlite.vsix 67d8a99aceb56384a81b3f30d6c71743146d2cc9
-P e66cf0401fab766f62c1d263dcb1efb67b2075a9
-R b0faef55b691eb73f9d6281a2018b023
+P b1b01c4cd9798d69951665ed7d6d9f79f6b463a1
+R db3c2f86cbdcb0a11fb0992163e936bd
 U drh
-Z b53d17a639d0a2dddf7d584349060e4d
+Z c6dac7cfeec82346ac2dc26da1ee134c

manifest.uuid

@@ -1 +1 @@
-b1b01c4cd9798d69951665ed7d6d9f79f6b463a1
+656a9c8b47d262e0982ad3a35db490e2ff4d856e

tool/checkSpacing.c

@@ -0,0 +1,67 @@
+/*
+** This program checks for formatting problems in source code:
+**
+**    *  Any use of tab characters
+**    *  White space at the end of a line
+**    *  Blank lines at the end of a file
+**
+** Any violations are reported.
+*/
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+static void checkSpacing(const char *zFile, int crok){
+  FILE *in = fopen(zFile, "rb");
+  int i;
+  int seenSpace;
+  int seenTab;
+  int ln = 0;
+  int lastNonspace = 0;
+  char zLine[2000];
+  if( in==0 ){
+    printf("cannot open %s\n", zFile);
+    return;
+  }
+  while( fgets(zLine, sizeof(zLine), in) ){
+    seenSpace = 0;
+    seenTab = 0;
+    ln++;
+    for(i=0; zLine[i]; i++){
+      if( zLine[i]=='\t' && seenTab==0 ){
+        printf("%s:%d: tab (\\t) character\n", zFile, ln);
+        seenTab = 1;
+      }else if( zLine[i]=='\r' ){
+        if( !crok ){
+          printf("%s:%d: carriage-return (\\r) character\n", zFile, ln);
+        }
+      }else if( zLine[i]==' ' ){
+        seenSpace = 1;
+      }else if( zLine[i]!='\n' ){
+        lastNonspace = ln;
+        seenSpace = 0;
+      }
+    }
+    if( seenSpace ){
+      printf("%s:%d: whitespace at end-of-line\n", zFile, ln);
+    }
+  }
+  fclose(in);
+  if( lastNonspace<ln ){
+    printf("%s:%d: blank lines at end of file (%d)\n",
+        zFile, ln, ln - lastNonspace);
+  }
+}
+
+int main(int argc, char **argv){
+  int i;
+  int crok = 0;
+  for(i=1; i<argc; i++){
+    if( strcmp(argv[i], "--crok")==0 ){
+      crok = 1;
+    }else{
+      checkSpacing(argv[i], crok);
+    }
+  }
+  return 0;
+}