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 }