| /* An abstract string datatype. |
| Copyright (C) 1998 Free Software Foundation, Inc. |
| Contributed by Mark Mitchell (mark@markmitchell.com). |
| |
| 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 this program; if not, write to the Free Software |
| Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| |
| /* This file lives in at least two places: binutils and gcc. |
| Don't change one without the other. */ |
| |
| #include "config.h" |
| #ifdef IN_GCC |
| #include "system.h" |
| #include "gansidecl.h" |
| #else |
| #include "ansidecl.h" |
| #endif |
| #include "dyn-string.h" |
| |
| extern char *xmalloc (); |
| extern char *xrealloc (); |
| |
| /* Create a new dynamic string capable of holding at least SPACE |
| characters, including the terminating NUL. If SPACE is 0, it |
| will be silently increased to 1. */ |
| |
| dyn_string_t |
| dyn_string_new (space) |
| int space; |
| { |
| dyn_string_t result = (dyn_string_t) xmalloc (sizeof (struct dyn_string)); |
| |
| if (space == 0) |
| /* We need at least one byte in which to store the terminating |
| NUL. */ |
| space = 1; |
| |
| result->allocated = space; |
| result->s = (char*) xmalloc (space); |
| result->length = 0; |
| result->s[0] = '\0'; |
| |
| return result; |
| } |
| |
| /* Free the memory used by DS. */ |
| |
| void |
| dyn_string_delete (ds) |
| dyn_string_t ds; |
| { |
| free (ds->s); |
| free (ds); |
| } |
| |
| /* Append the NUL-terminated string S to DS, resizing DS if |
| necessary. */ |
| |
| dyn_string_t |
| dyn_string_append (ds, s) |
| dyn_string_t ds; |
| char *s; |
| { |
| int len = strlen (s); |
| dyn_string_resize (ds, ds->length + len + 1 /* '\0' */); |
| strcpy (ds->s + ds->length, s); |
| ds->length += len; |
| |
| return ds; |
| } |
| |
| /* Increase the capacity of DS so that it can hold at least SPACE |
| characters, including the terminating NUL. This function will not |
| (at present) reduce the capacity of DS. */ |
| |
| dyn_string_t |
| dyn_string_resize (ds, space) |
| dyn_string_t ds; |
| int space; |
| { |
| int new_allocated = ds->allocated; |
| |
| while (space > new_allocated) |
| new_allocated *= 2; |
| |
| if (new_allocated != ds->allocated) |
| { |
| /* We actually need more space. */ |
| ds->allocated = new_allocated; |
| ds->s = (char*) xrealloc (ds->s, ds->allocated); |
| } |
| |
| return ds; |
| } |