Function xmlSchemaCollapseString

ThirdParty/libxml2/vtklibxml2/xmlschemastypes.c:2228–2270

* xmlSchemaCollapseString: * @value: a value * * Removes and normalize white spaces in the string * * Returns the new string or NULL if no change was required. */

 * Returns the new string or NULL if no change was required.
 */
xmlChar *
xmlSchemaCollapseString(const xmlChar *value) {
    const xmlChar *start = value, *end, *f;
    xmlChar *g;
    int col = 0;

    if (value == NULL) return(NULL);
    while ((*start != 0) && (IS_BLANK_CH(*start))) start++;
    end = start;
    while (*end != 0) {
	if ((*end == ' ') && (IS_BLANK_CH(end[1]))) {
	    col = end - start;
	    break;
	} else if ((*end == 0xa) || (*end == 0x9) || (*end == 0xd)) {
	    col = end - start;
	    break;
	}
	end++;
    }
    if (col == 0) {
	f = end;
	end--;
	while ((end > start) && (IS_BLANK_CH(*end))) end--;
	end++;
	if ((start == value) && (f == end)) return(NULL);
	return(xmlStrndup(start, end - start));
    }
    start = xmlStrdup(start);
    if (start == NULL) return(NULL);
    g = (xmlChar *) (start + col);
    end = g;
    while (*end != 0) {
	if (IS_BLANK_CH(*end)) {
	    end++;
	    while (IS_BLANK_CH(*end)) end++;
	    if (*end != 0)
		*g++ = ' ';
	} else
	    *g++ = *end++;
    }
    *g = 0;
    return((xmlChar *) start);
}

/**
 * xmlSchemaValAtomicListNode: