diff options
Diffstat (limited to 'libiberty/vasprintf.c')
| -rw-r--r-- | libiberty/vasprintf.c | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/libiberty/vasprintf.c b/libiberty/vasprintf.c new file mode 100644 index 00000000000..eeb80e661f7 --- /dev/null +++ b/libiberty/vasprintf.c @@ -0,0 +1,172 @@ +/* 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. */ + +#ifdef __STDC__ +#include <stdarg.h> +#else +#include <varargs.h> +#endif +#include <stdio.h> +#include <string.h> +#include <ansidecl.h> + +#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 */ |