| 1 | /* Like vsprintf but provides a pointer to malloc'd storage, which must |
| 2 | be freed by the caller. |
| 3 | Copyright (C) 1994 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of the libiberty library. |
| 6 | Libiberty is free software; you can redistribute it and/or |
| 7 | modify it under the terms of the GNU Library General Public |
| 8 | License as published by the Free Software Foundation; either |
| 9 | version 2 of the License, or (at your option) any later version. |
| 10 | |
| 11 | Libiberty is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | Library General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU Library General Public |
| 17 | License along with libiberty; see the file COPYING.LIB. If |
| 18 | not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 19 | Boston, MA 02111-1307, USA. */ |
| 20 | |
| 21 | #ifdef __STDC__ |
| 22 | #include <stdarg.h> |
| 23 | #else |
| 24 | #include <varargs.h> |
| 25 | #endif |
| 26 | #include <stdio.h> |
| 27 | #include <string.h> |
| 28 | #include <ansidecl.h> |
| 29 | |
| 30 | #ifdef TEST |
| 31 | int global_total_width; |
| 32 | #endif |
| 33 | |
| 34 | unsigned long strtoul (); |
| 35 | char *malloc (); |
| 36 | |
| 37 | static int |
| 38 | int_vasprintf (result, format, args) |
| 39 | char **result; |
| 40 | const char *format; |
| 41 | va_list *args; |
| 42 | { |
| 43 | const char *p = format; |
| 44 | /* Add one to make sure that it is never zero, which might cause malloc |
| 45 | to return NULL. */ |
| 46 | int total_width = strlen (format) + 1; |
| 47 | va_list ap; |
| 48 | |
| 49 | memcpy ((PTR) &ap, (PTR) args, sizeof (va_list)); |
| 50 | |
| 51 | while (*p != '\0') |
| 52 | { |
| 53 | if (*p++ == '%') |
| 54 | { |
| 55 | while (strchr ("-+ #0", *p)) |
| 56 | ++p; |
| 57 | if (*p == '*') |
| 58 | { |
| 59 | ++p; |
| 60 | total_width += abs (va_arg (ap, int)); |
| 61 | } |
| 62 | else |
| 63 | total_width += strtoul (p, &p, 10); |
| 64 | if (*p == '.') |
| 65 | { |
| 66 | ++p; |
| 67 | if (*p == '*') |
| 68 | { |
| 69 | ++p; |
| 70 | total_width += abs (va_arg (ap, int)); |
| 71 | } |
| 72 | else |
| 73 | total_width += strtoul (p, &p, 10); |
| 74 | } |
| 75 | while (strchr ("hlL", *p)) |
| 76 | ++p; |
| 77 | /* Should be big enough for any format specifier except %s and floats. */ |
| 78 | total_width += 30; |
| 79 | switch (*p) |
| 80 | { |
| 81 | case 'd': |
| 82 | case 'i': |
| 83 | case 'o': |
| 84 | case 'u': |
| 85 | case 'x': |
| 86 | case 'X': |
| 87 | case 'c': |
| 88 | (void) va_arg (ap, int); |
| 89 | break; |
| 90 | case 'f': |
| 91 | case 'e': |
| 92 | case 'E': |
| 93 | case 'g': |
| 94 | case 'G': |
| 95 | (void) va_arg (ap, double); |
| 96 | /* Since an ieee double can have an exponent of 307, we'll |
| 97 | make the buffer wide enough to cover the gross case. */ |
| 98 | total_width += 307; |
| 99 | break; |
| 100 | case 's': |
| 101 | total_width += strlen (va_arg (ap, char *)); |
| 102 | break; |
| 103 | case 'p': |
| 104 | case 'n': |
| 105 | (void) va_arg (ap, char *); |
| 106 | break; |
| 107 | } |
| 108 | } |
| 109 | } |
| 110 | #ifdef TEST |
| 111 | global_total_width = total_width; |
| 112 | #endif |
| 113 | *result = malloc (total_width); |
| 114 | if (*result != NULL) |
| 115 | return vsprintf (*result, format, *args); |
| 116 | else |
| 117 | return 0; |
| 118 | } |
| 119 | |
| 120 | int |
| 121 | vasprintf (result, format, args) |
| 122 | char **result; |
| 123 | const char *format; |
| 124 | #if defined (_BSD_VA_LIST_) && defined (__FreeBSD__) |
| 125 | _BSD_VA_LIST_ args; |
| 126 | #else |
| 127 | va_list args; |
| 128 | #endif |
| 129 | { |
| 130 | return int_vasprintf (result, format, &args); |
| 131 | } |
| 132 | |
| 133 | #ifdef TEST |
| 134 | void |
| 135 | checkit |
| 136 | #ifdef __STDC__ |
| 137 | (const char* format, ...) |
| 138 | #else |
| 139 | (va_alist) |
| 140 | va_dcl |
| 141 | #endif |
| 142 | { |
| 143 | va_list args; |
| 144 | char *result; |
| 145 | |
| 146 | #ifdef __STDC__ |
| 147 | va_start (args, format); |
| 148 | #else |
| 149 | char *format; |
| 150 | va_start (args); |
| 151 | format = va_arg (args, char *); |
| 152 | #endif |
| 153 | vasprintf (&result, format, args); |
| 154 | if (strlen (result) < global_total_width) |
| 155 | printf ("PASS: "); |
| 156 | else |
| 157 | printf ("FAIL: "); |
| 158 | printf ("%d %s\n", global_total_width, result); |
| 159 | } |
| 160 | |
| 161 | int |
| 162 | main () |
| 163 | { |
| 164 | checkit ("%d", 0x12345678); |
| 165 | checkit ("%200d", 5); |
| 166 | checkit ("%.300d", 6); |
| 167 | checkit ("%100.150d", 7); |
| 168 | checkit ("%s", "jjjjjjjjjiiiiiiiiiiiiiiioooooooooooooooooppppppppppppaa\n\ |
| 169 | 777777777777777777333333333333366666666666622222222222777777777777733333"); |
| 170 | checkit ("%f%s%d%s", 1.0, "foo", 77, "asdjffffffffffffffiiiiiiiiiiixxxxx"); |
| 171 | } |
| 172 | #endif /* TEST */ |