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Factor out the TreeView parse tree printing module into a separate file.

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FossilOrigin-Name: c32ce54ca46a4be4373983be6fd44b1f3a0250d1
This commit is contained in:
drh
2015-06-08 15:08:15 +00:00
parent 6c1f4ef217
commit 38b4149ca1
11 changed files with 475 additions and 447 deletions
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66
src/printf.c
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@@ -1,9 +1,6 @@
/*
** The "printf" code that follows dates from the 1980's. It is in
** the public domain. The original comments are included here for
** completeness. They are very out-of-date but might be useful as
** an historical reference. Most of the "enhancements" have been backed
** out so that the functionality is now the same as standard printf().
** the public domain.
**
**************************************************************************
**
@@ -1058,67 +1055,6 @@ void sqlite3DebugPrintf(const char *zFormat, ...){
}
#endif
#ifdef SQLITE_DEBUG
/*************************************************************************
** Routines for implementing the "TreeView" display of hierarchical
** data structures for debugging.
**
** The main entry points (coded elsewhere) are:
** sqlite3TreeViewExpr(0, pExpr, 0);
** sqlite3TreeViewExprList(0, pList, 0, 0);
** sqlite3TreeViewSelect(0, pSelect, 0);
** Insert calls to those routines while debugging in order to display
** a diagram of Expr, ExprList, and Select objects.
**
*/
/* Add a new subitem to the tree. The moreToFollow flag indicates that this
** is not the last item in the tree. */
TreeView *sqlite3TreeViewPush(TreeView *p, u8 moreToFollow){
if( p==0 ){
p = sqlite3_malloc64( sizeof(*p) );
if( p==0 ) return 0;
memset(p, 0, sizeof(*p));
}else{
p->iLevel++;
}
assert( moreToFollow==0 || moreToFollow==1 );
if( p->iLevel<sizeof(p->bLine) ) p->bLine[p->iLevel] = moreToFollow;
return p;
}
/* Finished with one layer of the tree */
void sqlite3TreeViewPop(TreeView *p){
if( p==0 ) return;
p->iLevel--;
if( p->iLevel<0 ) sqlite3_free(p);
}
/* Generate a single line of output for the tree, with a prefix that contains
** all the appropriate tree lines */
void sqlite3TreeViewLine(TreeView *p, const char *zFormat, ...){
va_list ap;
int i;
StrAccum acc;
char zBuf[500];
sqlite3StrAccumInit(&acc, 0, zBuf, sizeof(zBuf), 0);
if( p ){
for(i=0; i<p->iLevel && i<sizeof(p->bLine)-1; i++){
sqlite3StrAccumAppend(&acc, p->bLine[i] ? "| " : " ", 4);
}
sqlite3StrAccumAppend(&acc, p->bLine[i] ? "|-- " : "'-- ", 4);
}
va_start(ap, zFormat);
sqlite3VXPrintf(&acc, 0, zFormat, ap);
va_end(ap);
if( zBuf[acc.nChar-1]!='\n' ) sqlite3StrAccumAppend(&acc, "\n", 1);
sqlite3StrAccumFinish(&acc);
fprintf(stdout,"%s", zBuf);
fflush(stdout);
}
/* Shorthand for starting a new tree item that consists of a single label */
void sqlite3TreeViewItem(TreeView *p, const char *zLabel, u8 moreToFollow){
p = sqlite3TreeViewPush(p, moreToFollow);
sqlite3TreeViewLine(p, "%s", zLabel);
}
#endif /* SQLITE_DEBUG */
/*
** variable-argument wrapper around sqlite3VXPrintf().