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- /* Like vsprintf but provides a pointer to malloc'd storage, which must
- be freed by the caller.
- Copyright (C) 1994 Free Software Foundation, Inc.
-
- This file is part of the libiberty library.
- Libiberty is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public
- License as published by the Free Software Foundation; either
- version 2 of the License, or (at your option) any later version.
-
- Libiberty 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
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with libiberty; see the file COPYING.LIB. If
- not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
-
- #include <stdio.h>
- #include <string.h>
- #include <ansidecl.h>
- #ifdef __STDC__
- #include <stdarg.h>
- #else
- #include <varargs.h>
- #endif
-
- #ifdef TEST
- int global_total_width;
- #endif
-
- unsigned long strtoul ();
- char *malloc ();
-
- static int
- int_vasprintf (result, format, args)
- char **result;
- const char *format;
- va_list *args;
- {
- const char *p = format;
- /* Add one to make sure that it is never zero, which might cause malloc
- to return NULL. */
- int total_width = strlen (format) + 1;
- va_list ap;
-
- memcpy ((PTR) &ap, (PTR) args, sizeof (va_list));
-
- while (*p != '\0')
- {
- if (*p++ == '%')
- {
- while (strchr ("-+ #0", *p))
- ++p;
- if (*p == '*')
- {
- ++p;
- total_width += abs (va_arg (ap, int));
- }
- else
- total_width += strtoul (p, &p, 10);
- if (*p == '.')
- {
- ++p;
- if (*p == '*')
- {
- ++p;
- total_width += abs (va_arg (ap, int));
- }
- else
- total_width += strtoul (p, &p, 10);
- }
- while (strchr ("hlL", *p))
- ++p;
- /* Should be big enough for any format specifier except %s and floats. */
- total_width += 30;
- switch (*p)
- {
- case 'd':
- case 'i':
- case 'o':
- case 'u':
- case 'x':
- case 'X':
- case 'c':
- (void) va_arg (ap, int);
- break;
- case 'f':
- case 'e':
- case 'E':
- case 'g':
- case 'G':
- (void) va_arg (ap, double);
- /* Since an ieee double can have an exponent of 307, we'll
- make the buffer wide enough to cover the gross case. */
- total_width += 307;
- break;
- case 's':
- total_width += strlen (va_arg (ap, char *));
- break;
- case 'p':
- case 'n':
- (void) va_arg (ap, char *);
- break;
- }
- }
- }
- #ifdef TEST
- global_total_width = total_width;
- #endif
- *result = malloc (total_width);
- if (*result != NULL)
- return vsprintf (*result, format, *args);
- else
- return 0;
- }
-
- int
- vasprintf (result, format, args)
- char **result;
- const char *format;
- #if defined (_BSD_VA_LIST_) && defined (__FreeBSD__)
- _BSD_VA_LIST_ args;
- #else
- va_list args;
- #endif
- {
- return int_vasprintf (result, format, &args);
- }
-
- #ifdef TEST
- void
- checkit
- #ifdef __STDC__
- (const char* format, ...)
- #else
- (va_alist)
- va_dcl
- #endif
- {
- va_list args;
- char *result;
-
- #ifdef __STDC__
- va_start (args, format);
- #else
- char *format;
- va_start (args);
- format = va_arg (args, char *);
- #endif
- vasprintf (&result, format, args);
- if (strlen (result) < global_total_width)
- printf ("PASS: ");
- else
- printf ("FAIL: ");
- printf ("%d %s\n", global_total_width, result);
- }
-
- int
- main ()
- {
- checkit ("%d", 0x12345678);
- checkit ("%200d", 5);
- checkit ("%.300d", 6);
- checkit ("%100.150d", 7);
- checkit ("%s", "jjjjjjjjjiiiiiiiiiiiiiiioooooooooooooooooppppppppppppaa\n\
- 777777777777777777333333333333366666666666622222222222777777777777733333");
- checkit ("%f%s%d%s", 1.0, "foo", 77, "asdjffffffffffffffiiiiiiiiiiixxxxx");
- }
- #endif /* TEST */
-