Fossil

    pNew->iLevel = pParent ? pParent->iLevel+1 : 0;
    pNew->isDir = zPath[i]=='/';
    pNew->isLast = 1;
    while( zPath[i]=='/' ){ i++; }
    pParent = pNew;
  }
}















/*
** WEBPAGE: tree
**
** Query parameters:
**
**    name=PATH        Directory to display.  Optional

  char *zUuid = 0;
  Blob dirname;
  Manifest *pM = 0;
  int nFile = 0;           /* Number of files */
  int linkTrunk = 1;       /* include link to "trunk" */
  int linkTip = 1;         /* include link to "tip" */
  const char *zRE;         /* the value for the re=REGEXP query parameter */

  char *zREx = "";         /* Extra parameters for path hyperlinks */
  ReCompiled *pRE = 0;     /* Compiled regular expression */
  FileTreeNode *p;         /* One line of the tree */
  FileTree sTree;          /* The complete tree of files */
  HQuery sURI;             /* Hyperlink */
  char *zProjectName = db_get("project-name", 0);

  if( strcmp(PD("type",""),"flat")==0 ){ page_dir(); return; }
  memset(&sTree, 0, sizeof(sTree));
  login_check_credentials();
  if( !g.perm.Read ){ login_needed(); return; }
  while( nD>1 && zD[nD-2]=='/' ){ zD[(--nD)-1] = 0; }
  style_header("File List");

  /* Compute the title of the page */
  blob_zero(&dirname);
  if( zD ){
    url_add_parameter(&sURI, "name", zD);
    blob_append(&dirname, "within directory ", -1);
    hyperlinked_path(zD, &dirname, zCI, "tree", zREx);
    if( zRE ) blob_appendf(&dirname, " matching \"%s\"", zRE);

    style_submenu_element("Top-Level", "Top-Level", "%s",
                          url_render(&sURI, "name", 0, 0, 0));
  }else{
    if( zRE ){
      blob_appendf(&dirname, "matching \"%s\"", zRE);
    }

  }
  if( zCI ){
    style_submenu_element("All", "All", "%s",
                          url_render(&sURI, "ci", 0, 0, 0));
  }
  if( linkTrunk ){
    style_submenu_element("Trunk", "Trunk", "%s",

      if( nD>0
       && (fossil_strncmp(pFile->zName, zD, nD-1)!=0
           || pFile->zName[nD-1]!='/')
      ){
        continue;
      }
      if( pRE && re_match(pRE, (const u8*)pFile->zName, -1)==0 ) continue;
      db_bind_text(&ins, ":f", pFile->zName);
      db_bind_text(&ins, ":u", pFile->zUuid);
      db_step(&ins);
      db_reset(&ins);
    }
    db_finalize(&ins);
    db_prepare(&q, "SELECT x, uuid FROM filelist ORDER BY x");
    while( db_step(&q)==SQLITE_ROW ){
      tree_add_node(&sTree, db_column_text(&q,0), db_column_text(&q,1));
      nFile++;
    }
    db_finalize(&q);
  }else{
    Stmt q;
    db_prepare(&q, "SELECT name FROM filename ORDER BY name COLLATE nocase");
    while( db_step(&q)==SQLITE_ROW ){
      const char *z = db_column_text(&q, 0);
      if( nD>0 && (fossil_strncmp(z, zD, nD-1)!=0 || z[nD-1]!='/') ){
        continue;
      }
      if( pRE && re_match(pRE, (const u8*)z, -1)==0 ) continue;
      tree_add_node(&sTree, z, 0);
      nFile++;
    }
    db_finalize(&q);
  }

  if( zCI ){
    @ <h2>%d(nFile) files of
    @ check-in [%z(href("vinfo?name=%T",zUuid))%S(zUuid)</a>]
    @ %s(blob_str(&dirname))</h2>
  }else{
    int n = db_int(0, "SELECT count(*) FROM plink");
    @ <h2>%d(nFile) files from all %d(n) check-ins
    @ %s(blob_str(&dirname))</h2>
  }


  /* Generate a multi-column table listing the contents of zD[]
  ** directory.
  */
  @ <div class="filetree"><ul>
  if( nD ){
    char *zLink = href("%s", url_render(&sURI, "name", 0, 0, 0));
    @ <li class="dir">
    @ %z(zLink)%h(zProjectName)</a>
  }else{
    @ <li class="dir subdir">
    @ <a>%h(zProjectName)</a>
  }
  @ <ul>
  for(p=sTree.pFirst; p; p=p->pNext){

    if( p->isDir ){

      if( nD && strlen(p->zFullName)==nD-1 ){
        @ <li class="dir subdir">
      }else{

        @ <li class="dir">
      }
      if( fossil_strcmp(p->zFullName, zD)==0 ){
        @ <a>%h(p->zName)</a>
      }else{
        char *zLink = href("%s", url_render(&sURI, "name", p->zFullName, 0, 0));

        @ %z(zLink)%h(p->zName)</a>
      }
      @ <ul>
    }else{
      char *zLink;
      if( zCI ){
        zLink = href("%R/artifact/%s",p->zUuid);
      }else{
        zLink = href("%R/finfo?name=%T",p->zFullName);
      }
      @ <li class="%z(fileext_class(p->zName))">%z(zLink)%h(p->zName)</a>
    }
    if( p->isLast ){
      int nClose = p->iLevel - (p->pNext ? p->pNext->iLevel : 0);
      while( nClose-- > 0 ){
        @ </ul>
      }
    }
  }
  @ </ul>
  @ </ul></div>
  style_footer();

  /* We could free memory used by sTree here if we needed to.  But
  ** the process is about to exit, so doing so would not really accomplish
  ** anything useful. */
}

/*
** Return a CSS class name based on the given filename's extension.
** Result must be freed by the caller.
**/
const char *fileext_class(const char *zFilename){
  char *zClass;
  const char *zExt = strrchr(zFilename, '.');
  int isExt = zExt && zExt!=zFilename && zExt[1];
  int i;
  for( i=1; isExt && zExt[i]; i++ ) isExt &= fossil_isalnum(zExt[i]);
  if( isExt ){
    zClass = mprintf("file file-%s", zExt+1);
    for ( i=5; zClass[i]; i++ ) zClass[i] = fossil_tolower(zClass[i]);
  }else{
    zClass = mprintf("file");
  }
  return zClass;
}

    g.useAttach = 0;
    g.dbConfig = db_open(zDbName);
    g.zConfigDbType = "configdb";
  }
  g.zConfigDbName = zDbName;
}


/*
** Returns TRUE if zTable exists in the local database but lacks column
** zColumn
*/
static int db_local_table_exists_but_lacks_column(
  const char *zTable,
  const char *zColumn
){
  char *zDef = db_text(0, "SELECT sql FROM %s.sqlite_master"
                   " WHERE name=='%s' /*scan*/",
                   db_name("localdb"), zTable);
  int rc = 0;
  if( zDef ){
    char *zPattern = mprintf("* %s *", zColumn);
    rc = strglob(zPattern, zDef)==0;
    fossil_free(zPattern);
    fossil_free(zDef);
  }
  return rc;
}

/*
** If zDbName is a valid local database file, open it and return
** true.  If it is not a valid local database file, return 0.
*/
static int isValidLocalDb(const char *zDbName){
  i64 lsize;
  char *zVFileDef;

  if( file_access(zDbName, F_OK) ) return 0;
  lsize = file_size(zDbName);
  if( lsize%1024!=0 || lsize<4096 ) return 0;
  db_open_or_attach(zDbName, "localdb", 0);
  zVFileDef = db_text(0, "SELECT sql FROM %s.sqlite_master"
                         " WHERE name=='vfile'", db_name("localdb"));
  if( zVFileDef==0 ) return 0;

  /* If the "isexe" column is missing from the vfile table, then
  ** add it now.   This code added on 2010-03-06.  After all users have
  ** upgraded, this code can be safely deleted.
  */
  if( !strglob("* isexe *", zVFileDef) ){
    db_multi_exec("ALTER TABLE vfile ADD COLUMN isexe BOOLEAN DEFAULT 0");
  }

  /* If "islink"/"isLink" columns are missing from tables, then
  ** add them now.   This code added on 2011-01-17 and 2011-08-27.
  ** After all users have upgraded, this code can be safely deleted.
  */
  if( !strglob("* islink *", zVFileDef) ){
    db_multi_exec("ALTER TABLE vfile ADD COLUMN islink BOOLEAN DEFAULT 0");
    if( db_local_table_exists_but_lacks_column("stashfile", "isLink") ){
      db_multi_exec("ALTER TABLE stashfile ADD COLUMN isLink BOOL DEFAULT 0");
    }
    if( db_local_table_exists_but_lacks_column("undo", "isLink") ){
      db_multi_exec("ALTER TABLE undo ADD COLUMN isLink BOOLEAN DEFAULT 0");
    }
    if( db_local_table_exists_but_lacks_column("undo_vfile", "islink") ){
      db_multi_exec("ALTER TABLE undo_vfile ADD COLUMN islink BOOL DEFAULT 0");
    }
  }
  return 1;
}

/*
** Locate the root directory of the local repository tree.  The root
** directory is found by searching for a file named "_FOSSIL_" or ".fslckout"
** that contains a valid repository database.

  },
  { "ul.browser",
    "format for the list in the file browser",
    @   margin-left: 0.5em;
    @   padding-left: 0.5em;
    @   white-space: nowrap;
  },
  { ".filetree",
    "tree-view file browser",
    @   margin: 1em 0;
    @   line-height: 1.5;
  },
  { ".filetree ul",
    "tree-view lists",
    @   display: inline;
    @   margin: 0;
    @   padding: 0;
  },
  { ".filetree li",
    "tree-view list items",
    @   display: inline;
  },
  { ".filetree .subdir ul",
    "tree-view lists below subdir",
    @   position: relative;
    @   display: block;
    @   margin: 0 0 0 21px;
    @   padding: 0;
  },
  { ".filetree .subdir li",
    "tree-view lists items below subdir",
    @   position: relative;
    @   display: block;
    @   margin: 0;
    @   padding: 0;
  },
  { ".filetree .subdir li:before",
    "tree-view node lines",
    @   content: '';
    @   position: absolute;
    @   top: -.8em;
    @   left: -14px;
    @   width: 14px;
    @   height: 1.5em;
    @   border-left: 2px solid #aaa;
    @   border-bottom: 2px solid #aaa;
  },
  { ".filetree .subdir > ul ul:before",
    "tree-view directory lines",
    @   content: '';
    @   position: absolute;
    @   top: -1.5em;
    @   bottom: 0;
    @   left: -35px;
    @   border-left: 2px solid #aaa;
  },
  { ".filetree .subdir li:last-child > ul:before",
    "hide lines for last-child directories",
    @   display: none;
  },
  { ".filetree a",
    "tree-view links",
    @   position: relative;
    @   z-index: 1;
    @   display: inline-block;
    @   min-height: 16px;
    @   margin-right: .5em;
    @   padding-left: 21px;
    @   background-image: url(data:image/gif;base64,R0lGODlhEAAQAJEAAP\/\/\/yEhIf\/\/\/wAAACH5BAEHAAIALAAAAAAQABAAAAIvlIKpxqcfmgOUvoaqDSCxrEEfF14GqFXImJZsu73wepJzVMNxrtNTj3NATMKhpwAAOw==);
    @   background-position: center left;
    @   background-repeat: no-repeat;
  },
  { ".filetree .dir > a",
    "tree-view directory links",
    @   background-image: url(data:image/gif;base64,R0lGODlhEAAQAJEAAP/WVCIiIv\/\/\/wAAACH5BAEHAAIALAAAAAAQABAAAAInlI9pwa3XYniCgQtkrAFfLXkiFo1jaXpo+jUs6b5Z/K4siDu5RPUFADs=);
  },
  { "table.login_out",
    "table format for login/out label/input table",
    @   text-align: left;
    @   margin-right: 10px;
    @   margin-left: 10px;
    @   margin-top: 10px;
  },

  return Th_SetResult(interp, pValue->zData, pValue->nData);
}

/*
** Return true if variable (zVar, nVar) exists.
*/
int Th_ExistsVar(Th_Interp *interp, const char *zVar, int nVar){
  Th_Variable *pValue = thFindValue(interp, zVar, nVar, 0, 0);
  return pValue && pValue->zData;
}

/*
** String (zVar, nVar) must contain the name of a scalar variable or
** array member. If the variable does not exist it is created. The
** variable is set to the value supplied in string (zValue, nValue).
**

** an array, or an array member. If the identified variable exists, it
** is deleted and TH_OK returned. Otherwise, an error message is left
** in the interpreter result and TH_ERROR is returned.
*/
int Th_UnsetVar(Th_Interp *interp, const char *zVar, int nVar){
  Th_Variable *pValue;

  pValue = thFindValue(interp, zVar, nVar, 0, 1);
  if( !pValue ){
    return TH_ERROR;
  }

  Th_Free(interp, pValue->zData);
  pValue->zData = 0;
  if( pValue->pHash ){

{TH_ERROR: expected integer, got: "42.0"}}

###############################################################################

fossil test-th-eval "expr 42.0%0.0"
test th1-modulus-by-zero-4 {$RESULT eq \
{TH_ERROR: expected integer, got: "42.0"}}

###############################################################################

fossil test-th-eval "set var 1; info exists var"
test th1-info-exists-1 {$RESULT eq {1}}

###############################################################################

fossil test-th-eval "set var 1; unset var; info exists var"
test th1-info-exists-2 {$RESULT eq {0}}

###############################################################################

fossil test-th-eval "set var 1; unset var; set var 2; info exists var"
test th1-info-exists-3 {$RESULT eq {1}}

###############################################################################

fossil test-th-eval "set var 1; expr {\$var+0}"
test th1-info-exists-4 {$RESULT eq {1}}

###############################################################################

fossil test-th-eval "set var 1; unset var; expr {\$var+0}"
test th1-info-exists-5 {$RESULT eq {TH_ERROR: no such variable: var}}

###############################################################################

fossil test-th-eval "set var 1; unset var"
test th1-unset-1 {$RESULT eq {var}}

###############################################################################

fossil test-th-eval "unset var"
test th1-unset-2 {$RESULT eq {TH_ERROR: no such variable: var}}