176 lines
3.7 KiB
C
176 lines
3.7 KiB
C
/* Like vsprintf but provides a pointer to malloc'd storage, which must
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be freed by the caller.
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Copyright (C) 1994 Free Software Foundation, Inc.
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This file is part of the libiberty library.
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Libiberty is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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Libiberty is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details. */
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#include <stdio.h>
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#include <string.h>
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#ifdef __STDC__
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#include <stdarg.h>
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#else
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#include <varargs.h>
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#endif
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#ifdef TEST
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int global_total_width;
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#endif
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#ifdef STDC_HEADERS
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#include <stdlib.h>
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#else
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extern int abs ();
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extern unsigned long strtoul ();
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extern char *malloc ();
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#endif
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static int
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int_vasprintf (result, format, args)
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char **result;
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const char *format;
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va_list *args;
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{
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const char *p = format;
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/* Add one to make sure that it is never zero, which might cause malloc
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to return NULL. */
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int total_width = strlen (format) + 1;
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va_list ap;
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memcpy (&ap, args, sizeof (va_list));
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while (*p != '\0')
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{
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if (*p++ == '%')
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{
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while (strchr ("-+ #0", *p))
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++p;
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if (*p == '*')
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{
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++p;
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total_width += abs (va_arg (ap, int));
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}
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else
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total_width += strtoul (p, (char **)&p, 10);
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if (*p == '.')
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{
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++p;
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if (*p == '*')
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{
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++p;
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total_width += abs (va_arg (ap, int));
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}
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else
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total_width += strtoul (p, (char **)&p, 10);
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}
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while (strchr ("hlL", *p))
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++p;
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/* Should be big enough for any format specifier except %s. */
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total_width += 30;
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switch (*p)
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{
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case 'd':
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case 'i':
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case 'o':
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case 'u':
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case 'x':
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case 'X':
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case 'c':
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(void) va_arg (ap, int);
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break;
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case 'f':
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case 'e':
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case 'E':
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case 'g':
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case 'G':
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(void) va_arg (ap, double);
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break;
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case 's':
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total_width += strlen (va_arg (ap, char *));
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break;
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case 'p':
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case 'n':
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(void) va_arg (ap, char *);
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break;
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}
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}
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}
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#ifdef TEST
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global_total_width = total_width;
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#endif
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*result = malloc (total_width);
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if (*result != NULL)
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return vsprintf (*result, format, *args);
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else
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return 0;
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}
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int
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vasprintf (result, format, args)
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char **result;
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const char *format;
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va_list args;
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{
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#ifdef VA_LIST_IS_ARRAY
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/* If va_list is an array, we do not need the additional indirection */
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return int_vasprintf (result, format, args);
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#else
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/* va_list is some sort of pointer */
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return int_vasprintf (result, format, &args);
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#endif
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}
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#ifdef TEST
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void
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checkit
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#ifdef __STDC__
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(const char* format, ...)
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#else
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(va_alist)
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va_dcl
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#endif
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{
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va_list args;
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char *result;
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#ifdef __STDC__
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va_start (args, format);
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#else
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char *format;
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va_start (args);
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format = va_arg (args, char *);
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#endif
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vasprintf (&result, format, args);
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if (strlen (result) < global_total_width)
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printf ("PASS: ");
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else
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printf ("FAIL: ");
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printf ("%d %s\n", global_total_width, result);
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}
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int
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main ()
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{
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checkit ("%d", 0x12345678);
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checkit ("%200d", 5);
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checkit ("%.300d", 6);
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checkit ("%100.150d", 7);
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checkit ("%s", "jjjjjjjjjiiiiiiiiiiiiiiioooooooooooooooooppppppppppppaa\n\
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777777777777777777333333333333366666666666622222222222777777777777733333");
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checkit ("%f%s%d%s", 1.0, "foo", 77, "asdjffffffffffffffiiiiiiiiiiixxxxx");
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}
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#endif /* TEST */
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