dll/3rdparty/libxslt/extra.c

   1 /*
   2  * extra.c: Implementation of non-standard features
   3  *
   4  * Reference:
   5  *   Michael Kay "XSLT Programmer's Reference" pp 637-643
   6  *   The node-set() extension function
   7  *
   8  * See Copyright for the status of this software.
   9  *
  10  * daniel@veillard.com
  11  */
  12
  13 #define IN_LIBXSLT
  14 #include "libxslt.h"
  15
  16 #include <string.h>
  17 #ifdef HAVE_TIME_H
  18 #include <time.h>
  19 #endif
  20 #ifdef HAVE_STDLIB_H
  21 #include <stdlib.h>
  22 #endif
  23
  24 #include <libxml/xmlmemory.h>
  25 #include <libxml/tree.h>
  26 #include <libxml/hash.h>
  27 #include <libxml/xmlerror.h>
  28 #include <libxml/parserInternals.h>
  29 #include "xslt.h"
  30 #include "xsltInternals.h"
  31 #include "xsltutils.h"
  32 #include "extensions.h"
  33 #include "variables.h"
  34 #include "transform.h"
  35 #include "extra.h"
  36 #include "preproc.h"
  37
  38 #ifdef WITH_XSLT_DEBUG
  39 #define WITH_XSLT_DEBUG_EXTRA
  40 #endif
  41
  42 /************************************************************************
  43  *                                                                      *
  44  *              Handling of XSLT debugging                              *
  45  *                                                                      *
  46  ************************************************************************/
  47
  48 /**
  49  * xsltDebug:
  50  * @ctxt:  an XSLT processing context
  51  * @node:  The current node
  52  * @inst:  the instruction in the stylesheet
  53  * @comp:  precomputed informations
  54  *
  55  * Process an debug node
  56  */
  57 void
  58 xsltDebug(xsltTransformContextPtr ctxt, xmlNodePtr node ATTRIBUTE_UNUSED,
  59           xmlNodePtr inst ATTRIBUTE_UNUSED,
  60           xsltStylePreCompPtr comp ATTRIBUTE_UNUSED)
  61 {
  62     int i, j;
  63
  64     xsltGenericError(xsltGenericErrorContext, "Templates:\n");
  65     for (i = 0, j = ctxt->templNr - 1; ((i < 15) && (j >= 0)); i++, j--) {
  66         xsltGenericError(xsltGenericErrorContext, "#%d ", i);
  67         if (ctxt->templTab[j]->name != NULL)
  68             xsltGenericError(xsltGenericErrorContext, "name %s ",
  69                              ctxt->templTab[j]->name);
  70         if (ctxt->templTab[j]->match != NULL)
  71             xsltGenericError(xsltGenericErrorContext, "name %s ",
  72                              ctxt->templTab[j]->match);
  73         if (ctxt->templTab[j]->mode != NULL)
  74             xsltGenericError(xsltGenericErrorContext, "name %s ",
  75                              ctxt->templTab[j]->mode);
  76         xsltGenericError(xsltGenericErrorContext, "\n");
  77     }
  78     xsltGenericError(xsltGenericErrorContext, "Variables:\n");
  79     for (i = 0, j = ctxt->varsNr - 1; ((i < 15) && (j >= 0)); i++, j--) {
  80         xsltStackElemPtr cur;
  81
  82         if (ctxt->varsTab[j] == NULL)
  83             continue;
  84         xsltGenericError(xsltGenericErrorContext, "#%d\n", i);
  85         cur = ctxt->varsTab[j];
  86         while (cur != NULL) {
  87             if (cur->comp == NULL) {
  88                 xsltGenericError(xsltGenericErrorContext,
  89                                  "corrupted !!!\n");
  90             } else if (cur->comp->type == XSLT_FUNC_PARAM) {
  91                 xsltGenericError(xsltGenericErrorContext, "param ");
  92             } else if (cur->comp->type == XSLT_FUNC_VARIABLE) {
  93                 xsltGenericError(xsltGenericErrorContext, "var ");
  94             }
  95             if (cur->name != NULL)
  96                 xsltGenericError(xsltGenericErrorContext, "%s ",
  97                                  cur->name);
  98             else
  99                 xsltGenericError(xsltGenericErrorContext, "noname !!!!");
 100 #ifdef LIBXML_DEBUG_ENABLED
 101             if (cur->value != NULL) {
 102                 xmlXPathDebugDumpObject(stdout, cur->value, 1);
 103             } else {
 104                 xsltGenericError(xsltGenericErrorContext, "NULL !!!!");
 105             }
 106 #endif
 107             xsltGenericError(xsltGenericErrorContext, "\n");
 108             cur = cur->next;
 109         }
 110
 111     }
 112 }
 113
 114 /************************************************************************
 115  *                                                                      *
 116  *              Classic extensions as described by M. Kay               *
 117  *                                                                      *
 118  ************************************************************************/
 119
 120 /**
 121  * xsltFunctionNodeSet:
 122  * @ctxt:  the XPath Parser context
 123  * @nargs:  the number of arguments
 124  *
 125  * Implement the node-set() XSLT function
 126  *   node-set node-set(result-tree)
 127  *
 128  * This function is available in libxslt, saxon or xt namespace.
 129  */
 130 void
 131 xsltFunctionNodeSet(xmlXPathParserContextPtr ctxt, int nargs){
 132     if (nargs != 1) {
 133         xsltTransformError(xsltXPathGetTransformContext(ctxt), NULL, NULL,
 134                 "node-set() : expects one result-tree arg\n");
 135         ctxt->error = XPATH_INVALID_ARITY;
 136         return;
 137     }
 138     if ((ctxt->value == NULL) ||
 139         ((ctxt->value->type != XPATH_XSLT_TREE) &&
 140          (ctxt->value->type != XPATH_NODESET))) {
 141         xsltTransformError(xsltXPathGetTransformContext(ctxt), NULL, NULL,
 142             "node-set() invalid arg expecting a result tree\n");
 143         ctxt->error = XPATH_INVALID_TYPE;
 144         return;
 145     }
 146     if (ctxt->value->type == XPATH_XSLT_TREE) {
 147         ctxt->value->type = XPATH_NODESET;
 148     }
 149 }
 150
 151
 152 /*
 153  * Okay the following really seems unportable and since it's not
 154  * part of any standard I'm not too ashamed to do this
 155  */
 156 #if defined(linux) || defined(__sun)
 157 #if defined(HAVE_MKTIME) && defined(HAVE_LOCALTIME) && defined(HAVE_ASCTIME)
 158 #define WITH_LOCALTIME
 159
 160 /**
 161  * xsltFunctionLocalTime:
 162  * @ctxt:  the XPath Parser context
 163  * @nargs:  the number of arguments
 164  *
 165  * Implement the localTime XSLT function used by NORM
 166  *   string localTime(???)
 167  *
 168  * This function is available in Norm's extension namespace
 169  * Code (and comments) contributed by Norm
 170  */
 171 static void
 172 xsltFunctionLocalTime(xmlXPathParserContextPtr ctxt, int nargs) {
 173     xmlXPathObjectPtr obj;
 174     char *str;
 175     char digits[5];
 176     char result[29];
 177     long int field;
 178     time_t gmt, lmt;
 179     struct tm gmt_tm;
 180     struct tm *local_tm;
 181
 182     if (nargs != 1) {
 183        xsltTransformError(xsltXPathGetTransformContext(ctxt), NULL, NULL,
 184                       "localTime() : invalid number of args %d\n", nargs);
 185        ctxt->error = XPATH_INVALID_ARITY;
 186        return;
 187     }
 188
 189     obj = valuePop(ctxt);
 190
 191     if (obj->type != XPATH_STRING) {
 192         obj = xmlXPathConvertString(obj);
 193     }
 194     if (obj == NULL) {
 195         valuePush(ctxt, xmlXPathNewString((const xmlChar *)""));
 196         return;
 197     }
 198
 199     str = (char *) obj->stringval;
 200
 201     /* str = "$Date$" */
 202     memset(digits, 0, sizeof(digits));
 203     strncpy(digits, str+7, 4);
 204     field = strtol(digits, NULL, 10);
 205     gmt_tm.tm_year = field - 1900;
 206
 207     memset(digits, 0, sizeof(digits));
 208     strncpy(digits, str+12, 2);
 209     field = strtol(digits, NULL, 10);
 210     gmt_tm.tm_mon = field - 1;
 211
 212     memset(digits, 0, sizeof(digits));
 213     strncpy(digits, str+15, 2);
 214     field = strtol(digits, NULL, 10);
 215     gmt_tm.tm_mday = field;
 216
 217     memset(digits, 0, sizeof(digits));
 218     strncpy(digits, str+18, 2);
 219     field = strtol(digits, NULL, 10);
 220     gmt_tm.tm_hour = field;
 221
 222     memset(digits, 0, sizeof(digits));
 223     strncpy(digits, str+21, 2);
 224     field = strtol(digits, NULL, 10);
 225     gmt_tm.tm_min = field;
 226
 227     memset(digits, 0, sizeof(digits));
 228     strncpy(digits, str+24, 2);
 229     field = strtol(digits, NULL, 10);
 230     gmt_tm.tm_sec = field;
 231
 232     /* Now turn gmt_tm into a time. */
 233     gmt = mktime(&gmt_tm);
 234
 235
 236     /*
 237      * FIXME: it's been too long since I did manual memory management.
 238      * (I swore never to do it again.) Does this introduce a memory leak?
 239      */
 240     local_tm = localtime(&gmt);
 241
 242     /*
 243      * Calling localtime() has the side-effect of setting timezone.
 244      * After we know the timezone, we can adjust for it
 245      */
 246     lmt = gmt - timezone;
 247
 248     /*
 249      * FIXME: it's been too long since I did manual memory management.
 250      * (I swore never to do it again.) Does this introduce a memory leak?
 251      */
 252     local_tm = localtime(&lmt);
 253
 254     /*
 255      * Now convert local_tm back into a string. This doesn't introduce
 256      * a memory leak, so says asctime(3).
 257      */
 258
 259     str = asctime(local_tm);           /* "Tue Jun 26 05:02:16 2001" */
 260                                        /*  0123456789 123456789 123 */
 261
 262     memset(result, 0, sizeof(result)); /* "Thu, 26 Jun 2001" */
 263                                        /*  0123456789 12345 */
 264
 265     strncpy(result, str, 20);
 266     strcpy(result+20, "???");          /* tzname doesn't work, fake it */
 267     strncpy(result+23, str+19, 5);
 268
 269     /* Ok, now result contains the string I want to send back. */
 270     valuePush(ctxt, xmlXPathNewString((xmlChar *)result));
 271 }
 272 #endif
 273 #endif /* linux or sun */
 274
 275
 276 /**
 277  * xsltRegisterExtras:
 278  * @ctxt:  a XSLT process context
 279  *
 280  * Registers the built-in extensions. This function is deprecated, use
 281  * xsltRegisterAllExtras instead.
 282  */
 283 void
 284 xsltRegisterExtras(xsltTransformContextPtr ctxt ATTRIBUTE_UNUSED) {
 285     xsltRegisterAllExtras();
 286 }
 287
 288 /**
 289  * xsltRegisterAllExtras:
 290  *
 291  * Registers the built-in extensions
 292  */
 293 void
 294 xsltRegisterAllExtras (void) {
 295     xsltRegisterExtModuleFunction((const xmlChar *) "node-set",
 296                                   XSLT_LIBXSLT_NAMESPACE,
 297                                   xsltFunctionNodeSet);
 298     xsltRegisterExtModuleFunction((const xmlChar *) "node-set",
 299                                   XSLT_SAXON_NAMESPACE,
 300                                   xsltFunctionNodeSet);
 301     xsltRegisterExtModuleFunction((const xmlChar *) "node-set",
 302                                   XSLT_XT_NAMESPACE,
 303                                   xsltFunctionNodeSet);
 304 #ifdef WITH_LOCALTIME
 305     xsltRegisterExtModuleFunction((const xmlChar *) "localTime",
 306                                   XSLT_NORM_SAXON_NAMESPACE,
 307                                   xsltFunctionLocalTime);
 308 #endif
 309     xsltRegisterExtModuleElement((const xmlChar *) "debug",
 310                                  XSLT_LIBXSLT_NAMESPACE,
 311                                  NULL,
 312                                  (xsltTransformFunction) xsltDebug);
 313     xsltRegisterExtModuleElement((const xmlChar *) "output",
 314                                  XSLT_SAXON_NAMESPACE,
 315                                  xsltDocumentComp,
 316                                  (xsltTransformFunction) xsltDocumentElem);
 317     xsltRegisterExtModuleElement((const xmlChar *) "write",
 318                                  XSLT_XALAN_NAMESPACE,
 319                                  xsltDocumentComp,
 320                                  (xsltTransformFunction) xsltDocumentElem);
 321     xsltRegisterExtModuleElement((const xmlChar *) "document",
 322                                  XSLT_XT_NAMESPACE,
 323                                  xsltDocumentComp,
 324                                  (xsltTransformFunction) xsltDocumentElem);
 325     xsltRegisterExtModuleElement((const xmlChar *) "document",
 326                                  XSLT_NAMESPACE,
 327                                  xsltDocumentComp,
 328                                  (xsltTransformFunction) xsltDocumentElem);
 329 }