xref: /openbsd-src/lib/libexpat/examples/outline.c (revision c0dd97bfcad3dab6c31ec12b9de1274fd2d2f993)
1 /* Read an XML document from standard input and print an element
2    outline on standard output.
3    Must be used with Expat compiled for UTF-8 output.
4                             __  __            _
5                          ___\ \/ /_ __   __ _| |_
6                         / _ \\  /| '_ \ / _` | __|
7                        |  __//  \| |_) | (_| | |_
8                         \___/_/\_\ .__/ \__,_|\__|
9                                  |_| XML parser
10 
11    Copyright (c) 1997-2000 Thai Open Source Software Center Ltd
12    Copyright (c) 2000-2017 Expat development team
13    Licensed under the MIT license:
14 
15    Permission is  hereby granted,  free of charge,  to any  person obtaining
16    a  copy  of  this  software   and  associated  documentation  files  (the
17    "Software"),  to  deal in  the  Software  without restriction,  including
18    without  limitation the  rights  to use,  copy,  modify, merge,  publish,
19    distribute, sublicense, and/or sell copies of the Software, and to permit
20    persons  to whom  the Software  is  furnished to  do so,  subject to  the
21    following conditions:
22 
23    The above copyright  notice and this permission notice  shall be included
24    in all copies or substantial portions of the Software.
25 
26    THE  SOFTWARE  IS  PROVIDED  "AS  IS",  WITHOUT  WARRANTY  OF  ANY  KIND,
27    EXPRESS  OR IMPLIED,  INCLUDING  BUT  NOT LIMITED  TO  THE WARRANTIES  OF
28    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
29    NO EVENT SHALL THE AUTHORS OR  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
30    DAMAGES OR  OTHER LIABILITY, WHETHER  IN AN  ACTION OF CONTRACT,  TORT OR
31    OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
32    USE OR OTHER DEALINGS IN THE SOFTWARE.
33 */
34 
35 #include <stdio.h>
36 #include <expat.h>
37 
38 #ifdef XML_LARGE_SIZE
39 #if defined(XML_USE_MSC_EXTENSIONS) && _MSC_VER < 1400
40 #define XML_FMT_INT_MOD "I64"
41 #else
42 #define XML_FMT_INT_MOD "ll"
43 #endif
44 #else
45 #define XML_FMT_INT_MOD "l"
46 #endif
47 
48 #define BUFFSIZE        8192
49 
50 char Buff[BUFFSIZE];
51 
52 int Depth;
53 
54 static void XMLCALL
55 start(void *data, const char *el, const char **attr)
56 {
57   int i;
58   (void)data;
59 
60   for (i = 0; i < Depth; i++)
61     printf("  ");
62 
63   printf("%s", el);
64 
65   for (i = 0; attr[i]; i += 2) {
66     printf(" %s='%s'", attr[i], attr[i + 1]);
67   }
68 
69   printf("\n");
70   Depth++;
71 }
72 
73 static void XMLCALL
74 end(void *data, const char *el)
75 {
76   (void)data;
77   (void)el;
78 
79   Depth--;
80 }
81 
82 int
83 main(int argc, char *argv[])
84 {
85   XML_Parser p = XML_ParserCreate(NULL);
86   (void)argc;
87   (void)argv;
88 
89   if (! p) {
90     fprintf(stderr, "Couldn't allocate memory for parser\n");
91     exit(-1);
92   }
93 
94   XML_SetElementHandler(p, start, end);
95 
96   for (;;) {
97     int done;
98     int len;
99 
100     len = (int)fread(Buff, 1, BUFFSIZE, stdin);
101     if (ferror(stdin)) {
102       fprintf(stderr, "Read error\n");
103       exit(-1);
104     }
105     done = feof(stdin);
106 
107     if (XML_Parse(p, Buff, len, done) == XML_STATUS_ERROR) {
108       fprintf(stderr, "Parse error at line %" XML_FMT_INT_MOD "u:\n%s\n",
109               XML_GetCurrentLineNumber(p),
110               XML_ErrorString(XML_GetErrorCode(p)));
111       exit(-1);
112     }
113 
114     if (done)
115       break;
116   }
117   XML_ParserFree(p);
118   return 0;
119 }
120