| /* 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, 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| /* As a special exception, if you link this library with other files, |
| some of which are compiled with GCC, to produce an executable, |
| this library does not by itself cause the resulting executable |
| to be covered by the GNU General Public License. |
| This exception does not however invalidate any other reasons why |
| the executable file might be covered by the GNU General Public License. */ |
| |
| #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; |
| } |