/*
* Copyright (C) 2002 Marco Pesenti Gritti
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "ephy-string.h"
#include <string.h>
#include <glib.h>
#include <libgnome/libgnome.h>
#include <libgnome/gnome-i18n.h>
#include <libgnomevfs/gnome-vfs-mime.h>
#include <libxml/parser.h>
/**
* ephy_string_shorten: returns a newly allocated shortened version of str.
* the new string will be no longer than target_length characters, and will
* be of the form "http://blahblah...blahblah.html".
*/
gchar *
ephy_string_shorten (const gchar *str, gint target_length)
{
gchar *new_str;
gint actual_length, first_length, second_length;
if (!str) return NULL;
actual_length = strlen (str);
/* if the string is already short enough, or if it's too short for
* us to shorten it, return a new copy */
if (actual_length <= target_length ||
actual_length <= 3)
return g_strdup (str);
/* allocate new string */
new_str = g_new (gchar, target_length + 1);
/* calc lengths to take from beginning and ending of str */
second_length = (target_length - 3) / 2;
first_length = target_length - 3 - second_length;
/* create string */
strncpy (new_str, str, first_length);
strncpy (new_str + first_length, "...", 3);
strncpy (new_str + first_length + 3,
str + actual_length - second_length, second_length);
new_str[target_length] = '\0';
return new_str;
}
char *
ephy_string_double_underscores (const char *string)
{
int underscores;
const char *p;
char *q;
char *escaped;
if (string == NULL) {
return NULL;
}
underscores = 0;
for (p = string; *p != '\0'; p++) {
underscores += (*p == '_');
}
if (underscores == 0) {
return g_strdup (string);
}
escaped = g_new (char, strlen (string) + underscores + 1);
for (p = string, q = escaped; *p != '\0'; p++, q++) {
/* Add an extra underscore. */
if (*p == '_') {
*q++ = '_';
}
*q = *p;
}
*q = '\0';
return escaped;
}
/**
* ephy_string_store_time_in_string:
* NOTE: str must be at least 256 chars long
*/
void
ephy_string_store_time_in_string (GDate *t, gchar *str, const char *format)
{
int length;
if (t > 0)
{
/* format into string */
/* this is used whenever a brief date is needed, like
* in the history (for last visited, first time visited) */
length = g_date_strftime (str, 255,
format ? format : _("%Y-%m-%d"), t);
str[length] = '\0';
}
else
{
str[0] = '\0';
}
}
/**
* ephy_string_time_to_string:
*/
gchar *
ephy_string_time_to_string (GDate *t,
const char *format)
{
gchar str[256];
/* write into stack string */
ephy_string_store_time_in_string (t, str, format);
/* copy in heap and return */
return g_strdup (str);
}
gboolean
ephy_str_to_int (const char *string, int *integer)
{
long result;
char *parse_end;
/* Check for the case of an empty string. */
if (string == NULL || *string == '\0') {
return FALSE;
}
/* Call the standard library routine to do the conversion. */
errno = 0;
result = strtol (string, &parse_end, 0);
/* Check that the result is in range. */
if ((result == G_MINLONG || result == G_MAXLONG) && errno == ERANGE) {
return FALSE;
}
if (result < G_MININT || result > G_MAXINT) {
return FALSE;
}
/* Check that all the trailing characters are spaces. */
while (*parse_end != '\0') {
if (!g_ascii_isspace (*parse_end++)) {
return FALSE;
}
}
/* Return the result. */
*integer = result;
return TRUE;
}
/**
* ephy_str_strip_chr:
* Remove all occurrences of a character from a string.
*
* @source: The string to be stripped.
* @remove_this: The char to remove from @source
*
* Return value: A copy of @source, after removing all occurrences
* of @remove_this.
*/
char *
ephy_str_strip_chr (const char *source, char remove_this)
{
char *result, *out;
const char *in;
if (source == NULL) {
return NULL;
}
result = g_new (char, strlen (source) + 1);
in = source;
out = result;
do {
if (*in != remove_this) {
*out++ = *in;
}
} while (*in++ != '\0');
return result;
}
int
ephy_strcasecmp (const char *string_a, const char *string_b)
{
return g_ascii_strcasecmp (string_a == NULL ? "" : string_a,
string_b == NULL ? "" : string_b);
}
int
ephy_strcasecmp_compare_func (gconstpointer string_a, gconstpointer string_b)
{
return ephy_strcasecmp ((const char *) string_a,
(const char *) string_b);
}
/**
* like strpbrk but ignores chars preceded by slashes, unless the
* slash is also preceded by a slash unless that later slash is
* preceded by another slash... ;-)
*/
static char *
ephy_strpbrk_unescaped (const char *s, const char *accept)
{
gchar *ret = strpbrk (s, accept);
if (!ret || ret == s || *(ret - 1) != '\\')
{
return ret;
}
else
{
gchar *c = ret - 1;
g_assert (*c == '\\');
while (c >= s && *c == '\\') c--;
if ((ret - c) % 2 == 0)
{
return ephy_strpbrk_unescaped (ret + 1, accept);
}
else
{
return ret;
}
}
}
/**
* like strstr but supports quoting, ignoring matches inside quoted text
*/
static char *
ephy_strstr_with_quotes (const char *haystack, const char *needle,
const char *quotes)
{
gchar *quot = ephy_strpbrk_unescaped (haystack, quotes);
gchar *ret = strstr (haystack, needle);
if (!quot || !ret || ret < quot)
{
return ret;
}
quot = ephy_strpbrk_unescaped (quot + 1, quotes);
if (quot)
{
return ephy_strstr_with_quotes (quot + 1, needle, quotes);
}
else
{
return NULL;
}
}
/**
* like strpbrk but supports quoting, ignoring matches inside quoted text
*/
static char *
ephy_strpbrk_with_quotes (const char *haystack, const char *needles,
const char *quotes)
{
gchar *quot = ephy_strpbrk_unescaped (haystack, quotes);
gchar *ret = strpbrk (haystack, needles);
if (!quot || !ret || ret < quot)
{
return ret;
}
quot = ephy_strpbrk_unescaped (quot + 1, quotes);
if (quot)
{
return ephy_strpbrk_with_quotes (quot + 1, needles, quotes);
}
else
{
return NULL;
}
}
/**
* Like g_strsplit, but does not split tokens betwen quotes. Ignores
* quotes preceded by '\'.
*/
gchar **
ephy_strsplit_with_quotes (const gchar *string,
const gchar *delimiter,
gint max_tokens,
const gchar *quotes)
{
GSList *string_list = NULL, *slist;
gchar **str_array, *s;
guint n = 0;
const gchar *remainder;
g_return_val_if_fail (string != NULL, NULL);
g_return_val_if_fail (delimiter != NULL, NULL);
g_return_val_if_fail (delimiter[0] != '\0', NULL);
if (quotes == NULL)
{
return g_strsplit (string, delimiter, max_tokens);
}
if (max_tokens < 1)
{
max_tokens = G_MAXINT;
}
remainder = string;
s = ephy_strstr_with_quotes (remainder, delimiter, quotes);
if (s)
{
gsize delimiter_len = strlen (delimiter);
while (--max_tokens && s)
{
gsize len;
gchar *new_string;
len = s - remainder;
new_string = g_new (gchar, len + 1);
strncpy (new_string, remainder, len);
new_string[len] = 0;
string_list = g_slist_prepend (string_list, new_string);
n++;
remainder = s + delimiter_len;
s = ephy_strstr_with_quotes (remainder, delimiter, quotes);
}
}
if (*string)
{
n++;
string_list = g_slist_prepend (string_list, g_strdup (remainder));
}
str_array = g_new (gchar*, n + 1);
str_array[n--] = NULL;
for (slist = string_list; slist; slist = slist->next)
{
str_array[n--] = slist->data;
}
g_slist_free (string_list);
return str_array;
}
/**
* like ephy_strsplit_with_quotes, but matches any char in 'delimiters' as delimiter
* and does not return empty tokens
*/
gchar **
ephy_strsplit_multiple_delimiters_with_quotes (const gchar *string,
const gchar *delimiters,
gint max_tokens,
const gchar *quotes)
{
GSList *string_list = NULL, *slist;
gchar **str_array, *s;
guint n = 0;
const gchar *remainder;
g_return_val_if_fail (string != NULL, NULL);
g_return_val_if_fail (delimiters != NULL, NULL);
g_return_val_if_fail (delimiters[0] != '\0', NULL);
if (quotes == NULL)
{
quotes = "";
}
if (max_tokens < 1)
{
max_tokens = G_MAXINT;
}
remainder = string;
s = ephy_strpbrk_with_quotes (remainder, delimiters, quotes);
if (s)
{
const gsize delimiter_len = 1; /* only chars */
while (--max_tokens && s)
{
gsize len;
gchar *new_string;
len = s - remainder;
if (len > 0) /* ignore empty strings */
{
new_string = g_new (gchar, len + 1);
strncpy (new_string, remainder, len);
new_string[len] = 0;
string_list = g_slist_prepend (string_list, new_string);
n++;
}
remainder = s + delimiter_len;
s = ephy_strpbrk_with_quotes (remainder, delimiters, quotes);
}
}
if (*string)
{
n++;
string_list = g_slist_prepend (string_list, g_strdup (remainder));
}
str_array = g_new (gchar*, n + 1);
str_array[n--] = NULL;
for (slist = string_list; slist; slist = slist->next)
{
str_array[n--] = slist->data;
}
g_slist_free (string_list);
return str_array;
}
char *
ephy_str_replace_substring (const char *string,
const char *substring,
const char *replacement)
{
int substring_length, replacement_length, result_length, remaining_length;
const char *p, *substring_position;
char *result, *result_position;
g_return_val_if_fail (substring != NULL, g_strdup (string));
g_return_val_if_fail (substring[0] != '\0', g_strdup (string));
if (string == NULL)
{
return NULL;
}
substring_length = strlen (substring);
replacement_length = replacement == NULL ? 0 : strlen (replacement);
result_length = strlen (string);
for (p = string; ; p = substring_position + substring_length)
{
substring_position = strstr (p, substring);
if (substring_position == NULL)
{
break;
}
result_length += replacement_length - substring_length;
}
result = g_malloc (result_length + 1);
result_position = result;
for (p = string; ; p = substring_position + substring_length)
{
substring_position = strstr (p, substring);
if (substring_position == NULL)
{
remaining_length = strlen (p);
memcpy (result_position, p, remaining_length);
result_position += remaining_length;
break;
}
memcpy (result_position, p, substring_position - p);
result_position += substring_position - p;
memcpy (result_position, replacement, replacement_length);
result_position += replacement_length;
}
g_assert (result_position - result == result_length);
result_position[0] = '\0';
return result;
}
