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/* nih-dbus-tool
*
* indent.c - indentation and other code-style string changes
*
* Copyright © 2009 Scott James Remnant <scott@netsplit.com>.
* Copyright © 2009 Canonical Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2, as
* published by the Free Software Foundation.
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif /* HAVE_CONFIG_H */
#include <string.h>
#include <nih/macros.h>
#include <nih/alloc.h>
#include <nih/logging.h>
#include "indent.h"
/**
* indent:
* @str: pointer to string to be indented,
* @parent: parent object of returned string,
* @level: number of indents to add.
*
* Indents the given string @str with @level tab characters preceding
* each non-empty line, including the last even if that has no terminating
* newline.
*
* @str is modified directly, the returned string is simply a pointer to
* it, thus @parent is actually ignored though it usual to pass the parent
* of @str for style reasons.
*
* Returns: modified @str or NULL if insufficient memory.
**/
char *
indent (char ** str,
const void *parent,
int level)
{
char * s;
char * ret;
size_t len;
nih_assert (str != NULL);
nih_assert (*str != NULL);
nih_assert (level > 0);
/* First figure out how many tab characters we have to insert */
len = strlen (*str);
if (**str != '\n')
len += level;
for (s = *str; *s; s++)
if ((*s == '\n') && (s[1] != '\0') && (s[1] != '\n'))
len += level;
/* Increase the length of the string to fit */
ret = nih_realloc (*str, parent, len + 1);
if (! ret)
return NULL;
/* Now put the tab characters in */
*str = ret;
if (**str != '\n') {
memmove (*str + level, *str, len + 1 - level);
memset (*str, '\t', level);
}
for (s = *str; *s; s++) {
if ((*s == '\n') && (s[1] != '\0') && (s[1] != '\n')) {
memmove (s + level + 1, s + 1,
*str + len + 1 - level - s - 1);
memset (s + 1, '\t', level);
}
}
return *str;
}
/**
* comment:
* @str: pointer to string to be commented,
* @parent: parent object of returned string.
*
* Applies commenting to the given @str, prefixing " * " onto each line
* including the first and last.
*
* @str is modified directly, the returned string is simply a pointer to
* it, thus @parent is actually ignored though it usual to pass the parent
* of @str for style reasons.
*
* Returns: modified @str or NULL if insufficient memory.
**/
char *
comment (char ** str,
const void *parent)
{
char * s;
char * ret;
size_t len;
nih_assert (str != NULL);
nih_assert (*str != NULL);
/* First figure out how many characters we have to insert */
len = strlen (*str);
if (**str == '\n') {
len += 2;
} else {
len += 3;
}
for (s = *str; *s; s++) {
if ((*s == '\n') && (s[1] != '\0')) {
if (s[1] == '\n') {
len += 2;
} else {
len += 3;
}
}
}
/* Increase the length of the string to fit */
ret = nih_realloc (*str, parent, len + 1);
if (! ret)
return NULL;
/* Now put the comment characters in */
*str = ret;
if (**str == '\n') {
memmove (*str + 2, *str, len + 1 - 2);
memcpy (*str, " *", 2);
} else {
memmove (*str + 3, *str, len + 1 - 3);
memcpy (*str, " * ", 3);
}
for (s = *str; *s; s++) {
if ((*s == '\n') && (s[1] != '\0')) {
if (s[1] == '\n') {
memmove (s + 2 + 1, s + 1,
*str + len + 1 - 2 - s - 1);
memcpy (s + 1, " *", 2);
} else {
memmove (s + 3 + 1, s + 1,
*str + len + 1 - 3 - s - 1);
memcpy (s + 1, " * ", 3);
}
}
}
return *str;
}
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