Function proposal: nl2p
| From: | Louis-Philippe Huberdeau | Date: | Sun, 07 Mar 2004 18:07:08 +0000 |
| Subject: | Function proposal: nl2p | ||
| Groups: | php.internals | ||
| Request: | Send a blank email to internals+get-8421@lists.php.net to get a copy of this message | ||
I wrote this very simple function (modification from nl2br actually) to convert newlines to well formatted HTML paragraphs instead of line breaks, allowing better formatting of a dynamic output. It's not the most perfect piece of code ever written, but it works and it can be quite useful.
The <br /> tag does not have as much possibilities as the <p> tag when it comes to CSS, which gave me the idea to write this function.
--
Louis-Philippe Huberdeau
--- BEGIN ---
/* {{{ proto string nl2p(string str)
Converts newlines to HTML paragraphs for standard compliance */
PHP_FUNCTION(nl2p)
{
/* in brief this inserts </p>\n<p> before matched regexp \n\r?|\r\n? ,
<p> before the string and </p> after the string */
zval **zstr;
char *tmp, *str;
int new_length;
char *end, *target;
int repl_cnt = 0;
int seen_other_char = 0;
if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &zstr) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string_ex(zstr);
str = Z_STRVAL_PP(zstr);
end = str + Z_STRLEN_PP(zstr);
/* it is really faster to scan twice and allocate mem once insted scanning once
and constantly reallocing */
while (str < end) {
if( seen_other_char ) {
if (*str == '\r') {
if (*(str+1) == '\n') {
str++;
}
repl_cnt++;
seen_other_char = 0;
} else if (*str == '\n') {
if (*(str+1) == '\r') {
str++;
}
repl_cnt++;
seen_other_char = 0;
}
} else if( *str != '\n' && *str != '\r' ) {
seen_other_char = 1;
}
str++;
}
if (repl_cnt == 0) {
RETURN_STRINGL(Z_STRVAL_PP(zstr), Z_STRLEN_PP(zstr), 1);
}
new_length = Z_STRLEN_PP(zstr) + repl_cnt * (sizeof("\n</p>\n<p>") - 1) + sizeof("\n<p>\n") + sizeof("\n</p>");
tmp = target = emalloc(new_length + 1);
str = Z_STRVAL_PP(zstr);
*target++ = '\n';
*target++ = '<';
*target++ = 'p';
*target++ = '>';
*target++ = '\n';
seen_other_char = 0;
while (str < end) {
switch (*str) {
case '\r':
case '\n':
if( seen_other_char ) {
*target++ = '\n';
*target++ = '<';
*target++ = '/';
*target++ = 'p';
*target++ = '>';
*target++ = '\n';
*target++ = '<';
*target++ = 'p';
*target++ = '>';
if ((*str == '\r' && *(str+1) == '\n') || (*str == '\n' && *(str+1) == '\r')) {
*target++ = *str++;
}
seen_other_char = 0;
}
*target++ = *str;
break;
default:
seen_other_char = 1;
*target++ = *str;
}
str++;
}
*target++ = '\n';
*target++ = '<';
*target++ = '/';
*target++ = 'p';
*target++ = '>';
*target++ = '\n';
*target = '\0';
RETURN_STRINGL(tmp, new_length, 0);
}
/* }}} */
--- END ---