strl.c
上传用户:xu_441
上传日期:2007-01-04
资源大小:1640k
文件大小:2k
- /*
- * Copyright (c) 1999 Sendmail, Inc. and its suppliers.
- * All rights reserved.
- *
- * By using this file, you agree to the terms and conditions set
- * forth in the LICENSE file which can be found at the top level of
- * the sendmail distribution.
- *
- */
- #ifndef lint
- static char id[] = "@(#)$Id: strl.c,v 8.4 1999/10/18 21:50:06 gshapiro Exp $";
- #endif /* ! lint */
- #include <sendmail.h>
- #ifndef HASSTRL
- /*
- ** strlcpy -- copy string obeying length and ' ' terminate it
- **
- ** terminates with ' ' if len > 0
- **
- ** Parameters:
- ** dst -- "destination" string.
- ** src -- "from" string.
- ** len -- length of space available in "destination" string.
- **
- ** Returns:
- ** total length of the string tried to create (=strlen(src))
- ** if this is greater than len then an overflow would have
- ** occurred.
- */
- size_t
- strlcpy(dst, src, len)
- register char *dst;
- register const char *src;
- size_t len;
- {
- register size_t i;
- if (len-- <= 0)
- return strlen(src);
- for (i = 0; i < len && (dst[i] = src[i]) != 0; i++)
- continue;
- dst[i] = ' ';
- if (src[i] == ' ')
- return i;
- else
- return i + strlen(src + i);
- }
- /*
- ** strlcat -- catenate strings obeying length and ' ' terminate it
- **
- ** strlcat will append at most len - strlen(dst) - 1 chars.
- ** terminates with ' ' if len > 0
- **
- ** Parameters:
- ** dst -- "destination" string.
- ** src -- "from" string.
- ** len -- max. length of "destination" string.
- **
- ** Returns:
- ** total length of the string tried to create
- ** (= initial length of dst + length of src)
- ** if this is greater than len then an overflow would have
- ** occurred.
- */
- size_t
- strlcat(dst, src, len)
- register char *dst;
- register const char *src;
- size_t len;
- {
- register size_t i, j, o;
- o = strlen(dst);
- if (len < o + 1)
- return o + strlen(src);
- len -= o + 1;
- for (i = 0, j = o; i < len && (dst[j] = src[i]) != 0; i++, j++)
- continue;
- dst[j] = ' ';
- if (src[i] == ' ')
- return j;
- else
- return j + strlen(src + i);
- }
- #endif /* HASSTRL */