1 const char ssplit_rcs[] = "$Id: ssplit.c,v 1.3 2001/05/29 08:54:25 jongfoster Exp $";
2 /*********************************************************************
4 * File : $Source: /cvsroot/ijbswa/current/ssplit.c,v $
6 * Purpose : A function to split a string at specified deliminters.
8 * Copyright : Written by and Copyright (C) 2001 the SourceForge
9 * IJBSWA team. http://ijbswa.sourceforge.net
11 * Based on the Internet Junkbuster originally written
12 * by and Copyright (C) 1997 Anonymous Coders and
13 * Junkbusters Corporation. http://www.junkbusters.com
15 * This program is free software; you can redistribute it
16 * and/or modify it under the terms of the GNU General
17 * Public License as published by the Free Software
18 * Foundation; either version 2 of the License, or (at
19 * your option) any later version.
21 * This program is distributed in the hope that it will
22 * be useful, but WITHOUT ANY WARRANTY; without even the
23 * implied warranty of MERCHANTABILITY or FITNESS FOR A
24 * PARTICULAR PURPOSE. See the GNU General Public
25 * License for more details.
27 * The GNU General Public License should be included with
28 * this file. If not, you can view it at
29 * http://www.gnu.org/copyleft/gpl.html
30 * or write to the Free Software Foundation, Inc., 59
31 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
35 * Revision 1.3 2001/05/29 08:54:25 jongfoster
36 * Rewrote the innards of ssplit() to be easier to understand,
37 * faster, and to use less memory. Didn't change the interface
38 * except to give the parameters meaningful names.
40 * Revision 1.2 2001/05/17 23:01:01 oes
41 * - Cleaned CRLF's from the sources and related files
43 * Revision 1.1.1.1 2001/05/15 13:59:04 oes
44 * Initial import of version 2.9.3 source tree
47 *********************************************************************/
58 const char ssplit_h_rcs[] = SSPLIT_H_VERSION;
60 /* Define this for lots of debugging information to stdout */
62 /* #define SSPLIT_VERBOSE 1 */
65 /*********************************************************************
69 * Description : Split a string using delimiters in `delim'. Results
73 * 1 : str = string to split. Will be split in place
74 * (i.e. do not free until you've finished with vec,
75 * previous contents will be trashed by the call).
76 * 2 : delim = array of delimiters (if NULL, uses " \t").
77 * 3 : vec[] = results vector (aka. array) [out]
78 * 4 : vec_len = number of usable slots in the vector (aka. array size)
79 * 5 : dont_save_empty_fields = zero if consecutive delimiters
80 * give a null output field(s), nonzero if they are just
81 * to be considered as single delimeter
82 * 6 : ignore_leading = nonzero to ignore leading field
85 * Returns : -1 => Error: vec_len is too small to hold all the
86 * data, or str == NULL.
87 * >=0 => the number of fields put in `vec'.
88 * On error, vec and str may still have been overwritten.
90 *********************************************************************/
91 int ssplit(char *str, const char *delim, char *vec[], int vec_len,
92 int dont_save_empty_fields, int ignore_leading)
94 unsigned char is_delim[256];
95 unsigned char char_type;
104 /* Build is_delim array */
106 memset(is_delim, '\0', sizeof(is_delim));
110 delim = " \t"; /* default field separators */
115 is_delim[(unsigned)(unsigned char)*delim++] = 1; /* separator */
118 is_delim[(unsigned)(unsigned char)'\0'] = 2; /* terminator */
119 is_delim[(unsigned)(unsigned char)'\n'] = 2; /* terminator */
126 /* skip leading separators */
127 while (is_delim[(unsigned)(unsigned char)*str] == 1)
133 /* first pointer is the beginning of string */
134 /* Check if we want to save this field */
135 if ( (!dont_save_empty_fields)
136 || (is_delim[(unsigned)(unsigned char)*str] == 0) )
139 * We want empty fields, or the first character in this
140 * field is not a delimiter or the end of string.
143 if (vec_count >= vec_len)
145 return(-1); /* overflow */
147 vec[vec_count++] = (char *) str;
150 while ((char_type = is_delim[(unsigned)(unsigned char)*str]) != 2)
154 /* the char is a separator */
156 /* null terminate the substring */
159 /* Check if we want to save this field */
160 if ( (!dont_save_empty_fields)
161 || (is_delim[(unsigned)(unsigned char)*str] == 0) )
164 * We want empty fields, or the first character in this
165 * field is not a delimiter or the end of string.
168 if (vec_count >= vec_len)
170 return(-1); /* overflow */
172 vec[vec_count++] = (char *) str;
180 *str = '\0'; /* null terminate the substring */
182 #ifdef SSPLIT_VERBOSE
185 printf("dump %d strings\n", vec_count);
186 for (i = 0; i < vec_count; i++)
188 printf("%d '%s'\n", i, vec[i]);
191 #endif /* def SSPLIT_VERBOSE */