70 lines
1.8 KiB
C
70 lines
1.8 KiB
C
|
/* Implement string-related runtime actions for CHILL.
|
||
|
|
Copyright (C) 1992,1993 Free Software Foundation, Inc.
|
||
|
|
Author: Bill Cox
|
||
|
|
|
||
|
|
This file is part of GNU CC.
|
||
|
|
|
||
|
|
GNU CC 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, or (at your option)
|
||
|
|
any later version.
|
||
|
|
|
||
|
|
GNU CC 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 GNU CC; see the file COPYING. If not, write to
|
||
|
|
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
|
||
|
|
|
||
|
|
#define MIN(a, b) ((a) < (b) ? (a) : (b))
|
||
|
|
|
||
|
|
extern void cause_exception (char *exname, char *file, int lineno);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* function __concatstring
|
||
|
|
*
|
||
|
|
* parameters:
|
||
|
|
* OUT - pointer to output string
|
||
|
|
* S1 - pointer to left string
|
||
|
|
* LEN1 - length of left string
|
||
|
|
* S2 - pointer to right string
|
||
|
|
* LEN2 - length of right string
|
||
|
|
*
|
||
|
|
* returns:
|
||
|
|
* pointer to OUT string
|
||
|
|
*
|
||
|
|
* exceptions:
|
||
|
|
* none
|
||
|
|
*
|
||
|
|
* abstract:
|
||
|
|
* concatenates two character strings into the output string
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
char *
|
||
|
|
__concatstring (out, s1, len1, s2, len2)
|
||
|
|
char *out, *s1;
|
||
|
|
int len1;
|
||
|
|
char *s2;
|
||
|
|
int len2;
|
||
|
|
{
|
||
|
|
if (out)
|
||
|
|
{
|
||
|
|
if (s2 /* Check for overlap between s2 and out. */
|
||
|
|
&& ((s2 >= out && s2 < (out + len1 + len2))
|
||
|
|
|| (s2 + len2 > out && s2 <= out + len1)))
|
||
|
|
{
|
||
|
|
char *tmp = alloca (len2);
|
||
|
|
memcpy (tmp, s2, len2);
|
||
|
|
s2 = tmp;
|
||
|
|
}
|
||
|
|
if (s1)
|
||
|
|
memmove (out, s1, len1);
|
||
|
|
if (s2)
|
||
|
|
memcpy (&out[len1], s2, len2);
|
||
|
|
}
|
||
|
|
return out;
|
||
|
|
}
|