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common: Add new helper function, strsplit.

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* common/stringhelp.h (strsplit): New declaration.
* common/stringhelp.c (strsplit): New function.
* common/t-stringhelp.c (test_strsplit): New function.
(main): Call it here.

--
Signed-off-by: Neal H. Walfield <neal@g10code.de>
This commit is contained in:
Neal H. Walfield 2015-03-12 13:03:50 +01:00
parent bebab54027
commit b18ffcb81a
3 changed files with 98 additions and 1 deletions
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38
common/stringhelp.c
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@ -2,6 +2,7 @@
* Copyright (C) 1998, 1999, 2000, 2001, 2003, 2004, 2005, 2006, 2007,
* 2008, 2009, 2010 Free Software Foundation, Inc.
* Copyright (C) 2014 Werner Koch
* Copyright (C) 2015 g10 Code GmbH
*
* This file is part of JNLIB, which is a subsystem of GnuPG.
*
@ -48,6 +49,7 @@
# include <windows.h>
#endif
#include "util.h"
#include "libjnlib-config.h"
#include "utf8conv.h"
#include "sysutils.h"
@ -1196,3 +1198,39 @@ xstrconcat (const char *s1, ...)
}
return result;
}
/* Split a string into fields at DELIM. REPLACEMENT is the character
to replace the delimiter with (normally: '\0' so that each field is
NUL terminated). The caller is responsible for freeing the result.
Note: this function modifies STRING! If you need the original
value, then you should pass a copy to this function.
If malloc fails, this function returns NULL. */
char **
strsplit (char *string, char delim, char replacement, int *count)
{
int fields = 1;
char *t;
char **result;
/* First, count the number of fields. */
for (t = strchr (string, delim); t; t = strchr (t + 1, delim))
fields ++;
result = xtrycalloc (sizeof (*result), (fields + 1));
if (! result)
return NULL;
result[0] = string;
fields = 1;
for (t = strchr (string, delim); t; t = strchr (t + 1, delim))
{
result[fields ++] = t + 1;
*t = replacement;
}
if (count)
*count = fields;
return result;
}