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252b5132 RH |
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 | ||
74bcd529 DD |
21 | #ifdef HAVE_CONFIG_H |
22 | #include "config.h" | |
23 | #endif | |
24 | #include <ansidecl.h> | |
25 | #ifdef ANSI_PROTOTYPES | |
252b5132 RH |
26 | #include <stdarg.h> |
27 | #else | |
28 | #include <varargs.h> | |
29 | #endif | |
30 | #include <stdio.h> | |
31 | #include <string.h> | |
74bcd529 DD |
32 | #ifdef HAVE_STDLIB_H |
33 | #include <stdlib.h> | |
34 | #else | |
35 | extern unsigned long strtoul (); | |
36 | extern PTR malloc (); | |
37 | #endif | |
38 | #include "libiberty.h" | |
252b5132 RH |
39 | |
40 | #ifdef TEST | |
41 | int global_total_width; | |
42 | #endif | |
43 | ||
74bcd529 DD |
44 | |
45 | static int int_vasprintf PARAMS ((char **, const char *, va_list *)); | |
252b5132 RH |
46 | |
47 | static int | |
48 | int_vasprintf (result, format, args) | |
49 | char **result; | |
50 | const char *format; | |
51 | va_list *args; | |
52 | { | |
53 | const char *p = format; | |
54 | /* Add one to make sure that it is never zero, which might cause malloc | |
55 | to return NULL. */ | |
56 | int total_width = strlen (format) + 1; | |
57 | va_list ap; | |
58 | ||
59 | memcpy ((PTR) &ap, (PTR) args, sizeof (va_list)); | |
60 | ||
61 | while (*p != '\0') | |
62 | { | |
63 | if (*p++ == '%') | |
64 | { | |
65 | while (strchr ("-+ #0", *p)) | |
66 | ++p; | |
67 | if (*p == '*') | |
68 | { | |
69 | ++p; | |
70 | total_width += abs (va_arg (ap, int)); | |
71 | } | |
72 | else | |
74bcd529 | 73 | total_width += strtoul (p, (char **) &p, 10); |
252b5132 RH |
74 | if (*p == '.') |
75 | { | |
76 | ++p; | |
77 | if (*p == '*') | |
78 | { | |
79 | ++p; | |
80 | total_width += abs (va_arg (ap, int)); | |
81 | } | |
82 | else | |
74bcd529 | 83 | total_width += strtoul (p, (char **) &p, 10); |
252b5132 RH |
84 | } |
85 | while (strchr ("hlL", *p)) | |
86 | ++p; | |
87 | /* Should be big enough for any format specifier except %s and floats. */ | |
88 | total_width += 30; | |
89 | switch (*p) | |
90 | { | |
91 | case 'd': | |
92 | case 'i': | |
93 | case 'o': | |
94 | case 'u': | |
95 | case 'x': | |
96 | case 'X': | |
97 | case 'c': | |
98 | (void) va_arg (ap, int); | |
99 | break; | |
100 | case 'f': | |
101 | case 'e': | |
102 | case 'E': | |
103 | case 'g': | |
104 | case 'G': | |
105 | (void) va_arg (ap, double); | |
106 | /* Since an ieee double can have an exponent of 307, we'll | |
107 | make the buffer wide enough to cover the gross case. */ | |
108 | total_width += 307; | |
109 | break; | |
110 | case 's': | |
111 | total_width += strlen (va_arg (ap, char *)); | |
112 | break; | |
113 | case 'p': | |
114 | case 'n': | |
115 | (void) va_arg (ap, char *); | |
116 | break; | |
117 | } | |
df840b63 | 118 | p++; |
252b5132 RH |
119 | } |
120 | } | |
121 | #ifdef TEST | |
122 | global_total_width = total_width; | |
123 | #endif | |
124 | *result = malloc (total_width); | |
125 | if (*result != NULL) | |
126 | return vsprintf (*result, format, *args); | |
127 | else | |
128 | return 0; | |
129 | } | |
130 | ||
131 | int | |
132 | vasprintf (result, format, args) | |
133 | char **result; | |
134 | const char *format; | |
135 | #if defined (_BSD_VA_LIST_) && defined (__FreeBSD__) | |
136 | _BSD_VA_LIST_ args; | |
137 | #else | |
138 | va_list args; | |
139 | #endif | |
140 | { | |
141 | return int_vasprintf (result, format, &args); | |
142 | } | |
143 | ||
144 | #ifdef TEST | |
74bcd529 DD |
145 | static void checkit PARAMS ((const char *, ...)); |
146 | ||
147 | static void | |
148 | checkit VPARAMS ((const char* format, ...)) | |
252b5132 RH |
149 | { |
150 | va_list args; | |
151 | char *result; | |
74bcd529 DD |
152 | #ifndef ANSI_PROTOTYPES |
153 | const char *format; | |
154 | #endif | |
252b5132 | 155 | |
74bcd529 DD |
156 | VA_START (args, format); |
157 | ||
158 | #ifndef ANSI_PROTOTYPES | |
159 | format = va_arg (args, const char *); | |
252b5132 | 160 | #endif |
74bcd529 | 161 | |
252b5132 | 162 | vasprintf (&result, format, args); |
74bcd529 | 163 | if (strlen (result) < (size_t) global_total_width) |
252b5132 RH |
164 | printf ("PASS: "); |
165 | else | |
166 | printf ("FAIL: "); | |
167 | printf ("%d %s\n", global_total_width, result); | |
168 | } | |
169 | ||
74bcd529 DD |
170 | extern int main PARAMS ((void)); |
171 | ||
252b5132 RH |
172 | int |
173 | main () | |
174 | { | |
175 | checkit ("%d", 0x12345678); | |
176 | checkit ("%200d", 5); | |
177 | checkit ("%.300d", 6); | |
178 | checkit ("%100.150d", 7); | |
179 | checkit ("%s", "jjjjjjjjjiiiiiiiiiiiiiiioooooooooooooooooppppppppppppaa\n\ | |
180 | 777777777777777777333333333333366666666666622222222222777777777777733333"); | |
181 | checkit ("%f%s%d%s", 1.0, "foo", 77, "asdjffffffffffffffiiiiiiiiiiixxxxx"); | |
74bcd529 DD |
182 | |
183 | return 0; | |
252b5132 RH |
184 | } |
185 | #endif /* TEST */ |