Daniel Veillard | 260a68f | 1998-08-13 03:39:55 +0000 | [diff] [blame] | 1 | /* |
| 2 | * SAX.c : Default SAX handler to build a tree. |
| 3 | */ |
| 4 | |
| 5 | #include <stdio.h> |
Seth Alves | e7f12e6 | 1998-10-01 20:51:15 +0000 | [diff] [blame^] | 6 | #include <stdlib.h> |
Daniel Veillard | 260a68f | 1998-08-13 03:39:55 +0000 | [diff] [blame] | 7 | #include "tree.h" |
| 8 | #include "parser.h" |
| 9 | #include "error.h" |
| 10 | |
| 11 | /* #define DEBUG_SAX */ |
| 12 | |
| 13 | /* |
| 14 | * Return the public ID e.g. "-//SGMLSOURCE//DTD DEMO//EN" |
| 15 | */ |
| 16 | const CHAR *getPublicId(xmlParserCtxtPtr ctxt) { |
| 17 | return(NULL); |
| 18 | } |
| 19 | |
| 20 | /* |
| 21 | * Return the system ID, basically URI or filename e.g. |
| 22 | * http://www.sgmlsource.com/dtds/memo.dtd |
| 23 | */ |
| 24 | const CHAR *getSystemId(xmlParserCtxtPtr ctxt) { |
| 25 | return(ctxt->input->filename); |
| 26 | } |
| 27 | |
| 28 | /* |
| 29 | * Return the line number of the current parsing point. |
| 30 | */ |
| 31 | int getLineNumber(xmlParserCtxtPtr ctxt) { |
| 32 | return(ctxt->input->line); |
| 33 | } |
| 34 | /* |
| 35 | * Return the column number of the current parsing point. |
| 36 | */ |
| 37 | int getColumnNumber(xmlParserCtxtPtr ctxt) { |
| 38 | return(ctxt->input->col); |
| 39 | } |
| 40 | |
| 41 | /* |
| 42 | * The default SAX Locator. |
| 43 | */ |
| 44 | |
| 45 | xmlSAXLocator xmlDefaultSAXLocator = { |
| 46 | getPublicId, getSystemId, getLineNumber, getColumnNumber |
| 47 | }; |
| 48 | |
| 49 | /* |
| 50 | * Special entity resolver, better left to the parser, it has |
| 51 | * more context than the application layer. |
| 52 | */ |
| 53 | xmlParserInputPtr resolveEntity(xmlParserCtxtPtr ctxt, |
| 54 | const CHAR *publicId, const CHAR *systemId) { |
| 55 | |
| 56 | #ifdef DEBUG_SAX |
| 57 | fprintf(stderr, "SAX.resolveEntity(%s, %s)\n", publicId, systemId); |
| 58 | #endif |
| 59 | return(NULL); |
| 60 | } |
| 61 | |
| 62 | /* |
| 63 | * What to do when a notation declaration has been parsed. |
| 64 | * TODO Not handled currently. |
| 65 | */ |
| 66 | void notationDecl(xmlParserCtxtPtr ctxt, const CHAR *name, |
| 67 | const CHAR *publicId, const CHAR *systemId) { |
| 68 | #ifdef DEBUG_SAX |
| 69 | fprintf(stderr, "SAX.notationDecl(%s, %s, %s)\n", name, publicId, systemId); |
| 70 | #endif |
| 71 | } |
| 72 | |
| 73 | /* |
| 74 | * What to do when an unparsed entity declaration is parsed |
| 75 | * TODO Create an Entity node. |
| 76 | */ |
| 77 | void unparsedEntityDecl(xmlParserCtxtPtr ctxt, const CHAR *name, |
| 78 | const CHAR *publicId, const CHAR *systemId, |
| 79 | const CHAR *notationName) { |
| 80 | #ifdef DEBUG_SAX |
| 81 | fprintf(stderr, "SAX.unparsedEntityDecl(%s, %s, %s, %s)\n", |
| 82 | name, publicId, systemId, notationName); |
| 83 | #endif |
| 84 | } |
| 85 | |
| 86 | /* |
| 87 | * Receive the document locator at startup, actually xmlDefaultSAXLocator |
| 88 | * Everything is available on the context, so this is useless in our case. |
| 89 | */ |
| 90 | void setDocumentLocator(xmlParserCtxtPtr ctxt, xmlSAXLocatorPtr loc) { |
| 91 | #ifdef DEBUG_SAX |
| 92 | fprintf(stderr, "SAX.setDocumentLocator()\n"); |
| 93 | #endif |
| 94 | } |
| 95 | |
| 96 | /* |
| 97 | * called when the document start being processed. |
| 98 | */ |
| 99 | void startDocument(xmlParserCtxtPtr ctxt) { |
| 100 | #ifdef DEBUG_SAX |
| 101 | fprintf(stderr, "SAX.startDocument()\n"); |
| 102 | #endif |
| 103 | } |
| 104 | |
| 105 | /* |
| 106 | * called when the document end has been detected. |
| 107 | */ |
| 108 | void endDocument(xmlParserCtxtPtr ctxt) { |
| 109 | #ifdef DEBUG_SAX |
| 110 | fprintf(stderr, "SAX.endDocument()\n"); |
| 111 | #endif |
| 112 | } |
| 113 | |
| 114 | /* |
| 115 | * called when an opening tag has been processed. |
| 116 | * TODO We currently have a small pblm with the arguments ... |
| 117 | */ |
| 118 | void startElement(xmlParserCtxtPtr ctxt, const CHAR *name) { |
| 119 | xmlNodePtr parent; |
| 120 | |
| 121 | #ifdef DEBUG_SAX |
| 122 | fprintf(stderr, "SAX.startElement(%s)\n", name); |
| 123 | #endif |
| 124 | if (ctxt->nodeNr < 2) return; |
| 125 | parent = ctxt->nodeTab[ctxt->nodeNr - 2]; |
| 126 | if (parent != NULL) |
| 127 | xmlAddChild(parent, ctxt->node); |
| 128 | |
| 129 | } |
| 130 | |
| 131 | /* |
| 132 | * called when the end of an element has been detected. |
| 133 | */ |
| 134 | void endElement(xmlParserCtxtPtr ctxt, const CHAR *name) { |
| 135 | #ifdef DEBUG_SAX |
| 136 | fprintf(stderr, "SAX.endElement(%s)\n", name); |
| 137 | #endif |
| 138 | } |
| 139 | |
| 140 | /* |
| 141 | * receiving some chars from the parser. |
| 142 | * Question: how much at a time ??? |
| 143 | */ |
| 144 | void characters(xmlParserCtxtPtr ctxt, const CHAR *ch, |
| 145 | int start, int len) { |
| 146 | xmlNodePtr lastChild; |
| 147 | |
| 148 | #ifdef DEBUG_SAX |
| 149 | fprintf(stderr, "SAX.characters(%.30s, %d, %d)\n", ch, start, len); |
| 150 | #endif |
| 151 | /* |
| 152 | * Handle the data if any. If there is no child |
| 153 | * add it as content, otherwise if the last child is text, |
| 154 | * concatenate it, else create a new node of type text. |
| 155 | */ |
| 156 | |
| 157 | lastChild = xmlGetLastChild(ctxt->node); |
| 158 | if (lastChild == NULL) |
| 159 | xmlNodeAddContentLen(ctxt->node, &ch[start], len); |
| 160 | else { |
| 161 | if (xmlNodeIsText(lastChild)) |
| 162 | xmlTextConcat(lastChild, &ch[start], len); |
| 163 | else { |
| 164 | lastChild = xmlNewTextLen(&ch[start], len); |
| 165 | xmlAddChild(ctxt->node, lastChild); |
| 166 | } |
| 167 | } |
| 168 | } |
| 169 | |
| 170 | /* |
| 171 | * receiving some ignorable whitespaces from the parser. |
| 172 | * Question: how much at a time ??? |
| 173 | */ |
| 174 | void ignorableWhitespace(xmlParserCtxtPtr ctxt, const CHAR *ch, |
| 175 | int start, int len) { |
| 176 | #ifdef DEBUG_SAX |
| 177 | fprintf(stderr, "SAX.ignorableWhitespace(%.30s, %d, %d)\n", ch, start, len); |
| 178 | #endif |
| 179 | } |
| 180 | |
| 181 | /* |
| 182 | * A processing instruction has beem parsed. |
| 183 | */ |
| 184 | void processingInstruction(xmlParserCtxtPtr ctxt, const CHAR *target, |
| 185 | const CHAR *data) { |
| 186 | #ifdef DEBUG_SAX |
| 187 | fprintf(stderr, "SAX.processingInstruction(%s, %s)\n", target, data); |
| 188 | #endif |
| 189 | } |
| 190 | |
| 191 | xmlSAXHandler xmlDefaultSAXHandler = { |
| 192 | resolveEntity, |
| 193 | notationDecl, |
| 194 | unparsedEntityDecl, |
| 195 | setDocumentLocator, |
| 196 | startDocument, |
| 197 | endDocument, |
| 198 | startElement, |
| 199 | endElement, |
| 200 | characters, |
| 201 | ignorableWhitespace, |
| 202 | processingInstruction, |
| 203 | xmlParserWarning, |
| 204 | xmlParserError, |
| 205 | xmlParserError, |
| 206 | }; |
| 207 | |
| 208 | void xmlDefaultSAXHandlerInit(void) { |
| 209 | xmlDefaultSAXHandler.resolveEntity = resolveEntity; |
| 210 | xmlDefaultSAXHandler.notationDecl = notationDecl; |
| 211 | xmlDefaultSAXHandler.unparsedEntityDecl = unparsedEntityDecl; |
| 212 | xmlDefaultSAXHandler.setDocumentLocator = setDocumentLocator; |
| 213 | xmlDefaultSAXHandler.startDocument = startDocument; |
| 214 | xmlDefaultSAXHandler.endDocument = endDocument; |
| 215 | xmlDefaultSAXHandler.startElement = startElement; |
| 216 | xmlDefaultSAXHandler.endElement = endElement; |
| 217 | xmlDefaultSAXHandler.characters = characters; |
| 218 | xmlDefaultSAXHandler.ignorableWhitespace = ignorableWhitespace; |
| 219 | xmlDefaultSAXHandler.processingInstruction = processingInstruction; |
| 220 | xmlDefaultSAXHandler.warning = xmlParserWarning; |
| 221 | xmlDefaultSAXHandler.error = xmlParserError; |
| 222 | xmlDefaultSAXHandler.fatalError = xmlParserError; |
| 223 | } |