src/expat/examples/outline.c

   1 /*****************************************************************
   2  * outline.c
   3  *
   4  * Copyright 1999, Clark Cooper
   5  * All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the license contained in the
   9  * COPYING file that comes with the expat distribution.
  10  *
  11  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  12  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  13  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  14  * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
  15  * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  16  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  17  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  18  *
  19  * Read an XML document from standard input and print an element
  20  * outline on standard output.
  21  */
  22
  23
  24 #include <stdio.h>
  25 #include <expat.h>
  26
  27 #define BUFFSIZE        8192
  28
  29 char Buff[BUFFSIZE];
  30
  31 int Depth;
  32
  33 static void
  34 start(void *data, const char *el, const char **attr)
  35 {
  36   int i;
  37
  38   for (i = 0; i < Depth; i++)
  39     printf("  ");
  40
  41   printf("%s", el);
  42
  43   for (i = 0; attr[i]; i += 2) {
  44     printf(" %s='%s'", attr[i], attr[i + 1]);
  45   }
  46
  47   printf("\n");
  48   Depth++;
  49 }
  50
  51 static void
  52 end(void *data, const char *el)
  53 {
  54   Depth--;
  55 }
  56
  57 int
  58 main(int argc, char *argv[])
  59 {
  60   XML_Parser p = XML_ParserCreate(NULL);
  61   if (! p) {
  62     fprintf(stderr, "Couldn't allocate memory for parser\n");
  63     exit(-1);
  64   }
  65
  66   XML_SetElementHandler(p, start, end);
  67
  68   for (;;) {
  69     int done;
  70     int len;
  71
  72     len = fread(Buff, 1, BUFFSIZE, stdin);
  73     if (ferror(stdin)) {
  74       fprintf(stderr, "Read error\n");
  75       exit(-1);
  76     }
  77     done = feof(stdin);
  78
  79     if (XML_Parse(p, Buff, len, done) == XML_STATUS_ERROR) {
  80       fprintf(stderr, "Parse error at line %d:\n%s\n",
  81               XML_GetCurrentLineNumber(p),
  82               XML_ErrorString(XML_GetErrorCode(p)));
  83       exit(-1);
  84     }
  85
  86     if (done)
  87       break;
  88   }
  89   return 0;
  90 }