Function xmlParserPrintFileContextInternal

ThirdParty/libxml2/vtklibxml2/error.c:324–386

 */

static void
xmlParserPrintFileContextInternal(xmlParserInputPtr input ,
		xmlGenericErrorFunc channel, void *data ) {
    const xmlChar *cur, *base, *start;
    unsigned int n, col;	/* GCC warns if signed, because compared with sizeof() */
    xmlChar  content[81]; /* space for 80 chars + line terminator */
    xmlChar *ctnt;

    if ((input == NULL) || (input->cur == NULL))
        return;

    cur = input->cur;
    base = input->base;
    /* skip backwards over any end-of-lines */
    while ((cur > base) && ((*(cur) == '\n') || (*(cur) == '\r'))) {
	cur--;
    }
    n = 0;
    /* search backwards for beginning-of-line (to max buff size) */
    while ((n < sizeof(content) - 1) && (cur > base) &&
	   (*cur != '\n') && (*cur != '\r')) {
        cur--;
        n++;
    }
    if ((n > 0) && ((*cur == '\n') || (*cur == '\r'))) {
        cur++;
    } else {
        /* skip over continuation bytes */
        while ((cur < input->cur) && ((*cur & 0xC0) == 0x80))
            cur++;
    }
    /* calculate the error position in terms of the current position */
    col = input->cur - cur;
    /* search forward for end-of-line (to max buff size) */
    n = 0;
    start = cur;
    /* copy selected text to our buffer */
    while ((*cur != 0) && (*(cur) != '\n') && (*(cur) != '\r')) {
        int len = input->end - cur;
        int c = xmlGetUTF8Char(cur, &len);

        if ((c < 0) || (n + len > sizeof(content)-1))
            break;
        cur += len;
	n += len;
    }
    memcpy(content, start, n);
    content[n] = 0;
    /* print out the selected text */
    channel(data ,"%s\n", content);
    /* create blank line with problem pointer */
    n = 0;
    ctnt = content;
    /* (leave buffer space for pointer + line terminator) */
    while ((n<col) && (n++ < sizeof(content)-2) && (*ctnt != 0)) {
	if (*(ctnt) != '\t')
	    *(ctnt) = ' ';
	ctnt++;