/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* gstring-util : utilities for gstring object */
/*
*
* Author :
* Bertrand Guiheneuf <bertrand@helixcode.com>
*
* Copyright 1999, 2000 Helix Code, Inc. (http://www.helixcode.com)
*
* 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 of the
* License, 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 <config.h>
#include "gstring-util.h"
#include <string.h>
/**
* g_string_equals : test if two string are equal
*
* @string1 : first string
* @string2 : second string
*
* @Return Value : true if the strings equal, false otherwise
**/
gboolean
g_string_equals (GString *string1, GString *string2)
{
g_assert (string1);
g_assert (string2);
return !strcmp (string1->str, string2->str);
}
/**
* g_string_clone : clone a GString
*
* @string : the string to clone
*
* @Return Value : the clone ...
**/
GString *
g_string_clone (GString *string)
{
return g_string_new (g_strdup (string->str) );
}
/**
* g_string_dichotomy:
* @sep : separator
* @prefix: pointer to be field by the prefix object
* the prefix is not returned when the given pointer is NULL
* @suffix: pointer to be field by the suffix object
* the suffix is not returned when the given pointer is NULL
*
* Return the strings before and/or after
* the last occurence of the specified separator
*
* This routine returns the string before and/or after
* a character given as an argument.
* if the separator is the last character, prefix and/or
* suffix is set to NULL and result is set to 'l'
* if the separator is not in the list, prefix and/or
* suffix is set to NULL and result is set to 'n'
* When the operation succedeed, the return value is 'o'
*
* @Return Value : result of the operation ('o', 'l' or 'n')
*
**/
gchar
g_string_dichotomy (GString *string, gchar sep, GString **prefix, GString **suffix,
GStringDichotomyOption options)
{
gchar *str, *tmp;
gint pos, len, first;
g_assert (tmp=string->str);
len = strlen (tmp);
if (!len) {
if (prefix)
*prefix=NULL;
if (suffix)
*suffix=NULL;
return 'n';
}
first = 0;
if ((options & GSTRING_DICHOTOMY_STRIP_LEADING ) && (tmp[first] == sep) )
do {first++;} while ( (first<len) && (tmp[first] == sep) );
if (options & GSTRING_DICHOTOMY_STRIP_TRAILING )
while (tmp[len-1] == sep)
len--;
if (first==len) {
if (prefix) *prefix=NULL;
if (suffix) *suffix=NULL;
return 'n';
}
if (options & GSTRING_DICHOTOMY_RIGHT_DIR) {
pos = len;
do {
pos--;
} while ((pos>=first) && (tmp[pos]!=sep));
} else {
pos = first;
do {
pos++;
} while ((pos<len) && (tmp[pos]!=sep));
}
if ( (pos<first) || (pos>=len) )
{
if (suffix) *suffix=NULL;
if (prefix) *prefix=NULL;
return 'n';
}
/* if we have stripped trailing separators, we should */
/* never enter here */
if (pos==len-1)
{
if (suffix) *suffix=NULL;
if (prefix) *prefix=NULL;
return 'l';
}
/* if we have stripped leading separators, we should */
/* never enter here */
if (pos==first)
{
if (suffix) *suffix=NULL;
if (prefix) *prefix=NULL;
return 'l';
}
if (prefix) /* return the prefix */
{
str = g_strndup(tmp,pos);
*prefix = g_string_new(str);
g_free(str);
}
if (suffix) /* return the suffix */
{
str = g_strdup(tmp+pos+1);
*suffix = g_string_new(str);
g_free(str);
}
return 'o';
}
/**
* g_string_append_g_string : append a GString to another GString
*
* @dest_string : string which will be appended
* @other_string : string to append
*
**/
void
g_string_append_g_string(GString *dest_string, GString *other_string)
{
g_assert(other_string);
g_assert(dest_string);
g_assert(other_string->str);
g_string_append(dest_string, other_string->str);
}
/**
* g_string_equal_for_hash: test equality of two GStrings for hash tables
* @v: string 1
* @v2: string 2
*
*
*
* Return value:
**/
gint
g_string_equal_for_hash (gconstpointer v, gconstpointer v2)
{
return strcmp ( ((const GString*)v)->str, ((const GString*)v2)->str) == 0;
}
gint
g_string_equal_for_glist (gconstpointer v, gconstpointer v2)
{
return !strcmp ( ((const GString*)v)->str, ((const GString*)v2)->str) == 0;
}
/**
* g_string_hash: computes a hash value for a Gstring
* @v: Gstring object
*
*
*
* Return value:
**/
guint
g_string_hash (gconstpointer v)
{
return g_str_hash(((const GString*)v)->str);
}
/* utility func : frees a GString element in a GList */
static void
__g_string_list_free_string (gpointer data, gpointer user_data)
{
GString *string = (GString *)data;
g_string_free(string, TRUE);
}
void
g_string_list_free (GList *string_list)
{
g_list_foreach(string_list, __g_string_list_free_string, NULL);
g_list_free(string_list);
}
GList *
g_string_split (GString *string, char sep, gchar *trim_chars, GStringTrimOption trim_options)
{
GList *result = NULL;
gint first, last, pos;
gchar *str;
gchar *new_str;
GString *new_gstring;
g_assert (string);
str = string->str;
if (!str) return NULL;
first = 0;
last = strlen(str) - 1;
/* strip leading and trailing separators */
while ( (first<=last) && (str[first]==sep) )
first++;
while ( (first<=last) && (str[last]==sep) )
last--;
while (first<=last) {
pos = first;
/* find next separator */
while ((pos<=last) && (str[pos]!=sep)) pos++;
if (first != pos) {
new_str = g_strndup (str+first, pos-first);
new_gstring = g_string_new (new_str);
g_free (new_str);
/* could do trimming in line to speed up this code */
if (trim_chars) g_string_trim (new_gstring, trim_chars, trim_options);
result = g_list_append (result, new_gstring);
}
first = pos + 1;
}
return result;
}
void
g_string_trim (GString *string, gchar *chars, GStringTrimOption options)
{
gint first_ok;
gint last_ok;
guint length;
gchar *str;
if ((!string) || (!string->str))
return;
str = string->str;
length = strlen (str);
if (!length)
return;
first_ok = 0;
last_ok = length - 1;
if (options & GSTRING_TRIM_STRIP_LEADING)
while ( (first_ok <= last_ok) && (strchr (chars, str[first_ok])) )
first_ok++;
if (options & GSTRING_TRIM_STRIP_TRAILING)
while ( (first_ok <= last_ok) && (strchr (chars, str[last_ok])) )
last_ok++;
if (first_ok > 0)
g_string_erase (string, 0, first_ok);
if (last_ok < length-1)
g_string_truncate (string, last_ok - first_ok +1);
}
