50 lines
1.3 KiB
C
Executable File
50 lines
1.3 KiB
C
Executable File
#include "debug.h"
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#include <libxslt/extensions.h>
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#include <libxml/xpath.h>
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#include <libxml/xpathInternals.h>
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#define COW_URI ((const xmlChar *)"http://www.csclub.uwaterloo.ca/cow")
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/* return the term ({Winter,Summer,Fall} YYYY) for a date in
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* YYYY-MM-DD format.
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*/
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void extension_cow_term(xmlXPathParserContextPtr ctxt,
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int nargs)
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{
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xmlChar *str, *ret;
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int month;
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if (nargs != 1) {
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xmlXPathSetArityError(ctxt);
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}
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str = xmlXPathPopString(ctxt);
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month = (str[5] - '0')*10 + (str[6] - '0');
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ret = xmlUTF8Strndup((const xmlChar*)(month < 9 ? (month < 5 ? "Winter " : "Spring ") : "Fall "), 7);
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ret = xmlStrcat(ret, xmlUTF8Strsub(str, 0, 4));
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xmlXPathReturnString(ctxt, ret);
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xmlFree(str);
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}
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void *extension_init_func(xsltTransformContextPtr ctxt,
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const xmlChar *URI)
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{
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return 0;
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}
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void extension_shutdown_func(xsltTransformContextPtr ctxt,
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const xmlChar *URI,
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void *data)
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{
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}
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void init_extensions()
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{
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xsltRegisterExtModule(COW_URI,
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extension_init_func, extension_shutdown_func);
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xsltRegisterExtModuleFunction((const xmlChar*)"term", COW_URI,
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extension_cow_term);
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}
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