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) 2000 Clark Cooper <coopercc@users.sourceforge.net> 12 Copyright (c) 2001-2003 Fred L. Drake, Jr. <fdrake@users.sourceforge.net> 13 Copyright (c) 2005-2007 Steven Solie <steven@solie.ca> 14 Copyright (c) 2005-2006 Karl Waclawek <karl@waclawek.net> 15 Copyright (c) 2016-2022 Sebastian Pipping <sebastian@pipping.org> 16 Copyright (c) 2017 Rhodri James <rhodri@wildebeest.org.uk> 17 Licensed under the MIT license: 18 19 Permission is hereby granted, free of charge, to any person obtaining 20 a copy of this software and associated documentation files (the 21 "Software"), to deal in the Software without restriction, including 22 without limitation the rights to use, copy, modify, merge, publish, 23 distribute, sublicense, and/or sell copies of the Software, and to permit 24 persons to whom the Software is furnished to do so, subject to the 25 following conditions: 26 27 The above copyright notice and this permission notice shall be included 28 in all copies or substantial portions of the Software. 29 30 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 31 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 32 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN 33 NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 34 DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 35 OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 36 USE OR OTHER DEALINGS IN THE SOFTWARE. 37 */ 38 39 #include <stdio.h> 40 #include <expat.h> 41 42 #ifdef XML_LARGE_SIZE 43 # define XML_FMT_INT_MOD "ll" 44 #else 45 # define XML_FMT_INT_MOD "l" 46 #endif 47 48 #ifdef XML_UNICODE_WCHAR_T 49 # define XML_FMT_STR "ls" 50 #else 51 # define XML_FMT_STR "s" 52 #endif 53 54 static void XMLCALL 55 startElement(void *userData, const XML_Char *name, const XML_Char **atts) { 56 int i; 57 int *const depthPtr = (int *)userData; 58 59 for (i = 0; i < *depthPtr; i++) 60 printf(" "); 61 62 printf("%" XML_FMT_STR, name); 63 64 for (i = 0; atts[i]; i += 2) { 65 printf(" %" XML_FMT_STR "='%" XML_FMT_STR "'", atts[i], atts[i + 1]); 66 } 67 68 printf("\n"); 69 *depthPtr += 1; 70 } 71 72 static void XMLCALL 73 endElement(void *userData, const XML_Char *name) { 74 int *const depthPtr = (int *)userData; 75 (void)name; 76 77 *depthPtr -= 1; 78 } 79 80 int 81 main(void) { 82 XML_Parser parser = XML_ParserCreate(NULL); 83 int done; 84 int depth = 0; 85 86 if (! parser) { 87 fprintf(stderr, "Couldn't allocate memory for parser\n"); 88 return 1; 89 } 90 91 XML_SetUserData(parser, &depth); 92 XML_SetElementHandler(parser, startElement, endElement); 93 94 do { 95 void *const buf = XML_GetBuffer(parser, BUFSIZ); 96 if (! buf) { 97 fprintf(stderr, "Couldn't allocate memory for buffer\n"); 98 XML_ParserFree(parser); 99 return 1; 100 } 101 102 const size_t len = fread(buf, 1, BUFSIZ, stdin); 103 104 if (ferror(stdin)) { 105 fprintf(stderr, "Read error\n"); 106 XML_ParserFree(parser); 107 return 1; 108 } 109 110 done = feof(stdin); 111 112 if (XML_ParseBuffer(parser, (int)len, done) == XML_STATUS_ERROR) { 113 fprintf(stderr, 114 "Parse error at line %" XML_FMT_INT_MOD "u:\n%" XML_FMT_STR "\n", 115 XML_GetCurrentLineNumber(parser), 116 XML_ErrorString(XML_GetErrorCode(parser))); 117 XML_ParserFree(parser); 118 return 1; 119 } 120 } while (! done); 121 122 XML_ParserFree(parser); 123 return 0; 124 } 125