Commit | Line | Data |
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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. | |
281e9aa6 | 3 | Copyright (C) 1994, 2003, 2011, 2013 Free Software Foundation, Inc. |
252b5132 RH |
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 | |
979c05d3 NC |
18 | not, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, |
19 | Boston, MA 02110-1301, USA. */ | |
252b5132 | 20 | |
74bcd529 DD |
21 | #ifdef HAVE_CONFIG_H |
22 | #include "config.h" | |
23 | #endif | |
24 | #include <ansidecl.h> | |
252b5132 | 25 | #include <stdarg.h> |
f9b4e353 DD |
26 | #if !defined (va_copy) && defined (__va_copy) |
27 | # define va_copy(d,s) __va_copy((d),(s)) | |
28 | #endif | |
252b5132 | 29 | #include <stdio.h> |
843f21be | 30 | #ifdef HAVE_STRING_H |
252b5132 | 31 | #include <string.h> |
843f21be | 32 | #endif |
74bcd529 DD |
33 | #ifdef HAVE_STDLIB_H |
34 | #include <stdlib.h> | |
35 | #else | |
36 | extern unsigned long strtoul (); | |
37 | extern PTR malloc (); | |
38 | #endif | |
39 | #include "libiberty.h" | |
252b5132 RH |
40 | |
41 | #ifdef TEST | |
42 | int global_total_width; | |
43 | #endif | |
44 | ||
ba19b94f DD |
45 | /* |
46 | ||
d4d868a2 RW |
47 | @deftypefn Extension int vasprintf (char **@var{resptr}, @ |
48 | const char *@var{format}, va_list @var{args}) | |
ba19b94f DD |
49 | |
50 | Like @code{vsprintf}, but instead of passing a pointer to a buffer, | |
51 | you pass a pointer to a pointer. This function will compute the size | |
52 | of the buffer needed, allocate memory with @code{malloc}, and store a | |
53 | pointer to the allocated memory in @code{*@var{resptr}}. The value | |
54 | returned is the same as @code{vsprintf} would return. If memory could | |
5a4e47bd | 55 | not be allocated, minus one is returned and @code{NULL} is stored in |
ba19b94f DD |
56 | @code{*@var{resptr}}. |
57 | ||
58 | @end deftypefn | |
59 | ||
60 | */ | |
74bcd529 | 61 | |
49b1fae4 | 62 | static int int_vasprintf (char **, const char *, va_list); |
252b5132 RH |
63 | |
64 | static int | |
49b1fae4 | 65 | int_vasprintf (char **result, const char *format, va_list args) |
252b5132 RH |
66 | { |
67 | const char *p = format; | |
68 | /* Add one to make sure that it is never zero, which might cause malloc | |
69 | to return NULL. */ | |
70 | int total_width = strlen (format) + 1; | |
71 | va_list ap; | |
72 | ||
2382c03f DD |
73 | #ifdef va_copy |
74 | va_copy (ap, args); | |
75 | #else | |
76 | memcpy ((PTR) &ap, (PTR) &args, sizeof (va_list)); | |
77 | #endif | |
252b5132 RH |
78 | |
79 | while (*p != '\0') | |
80 | { | |
81 | if (*p++ == '%') | |
82 | { | |
83 | while (strchr ("-+ #0", *p)) | |
84 | ++p; | |
85 | if (*p == '*') | |
86 | { | |
87 | ++p; | |
88 | total_width += abs (va_arg (ap, int)); | |
89 | } | |
90 | else | |
74bcd529 | 91 | total_width += strtoul (p, (char **) &p, 10); |
252b5132 RH |
92 | if (*p == '.') |
93 | { | |
94 | ++p; | |
95 | if (*p == '*') | |
96 | { | |
97 | ++p; | |
98 | total_width += abs (va_arg (ap, int)); | |
99 | } | |
100 | else | |
74bcd529 | 101 | total_width += strtoul (p, (char **) &p, 10); |
252b5132 RH |
102 | } |
103 | while (strchr ("hlL", *p)) | |
104 | ++p; | |
105 | /* Should be big enough for any format specifier except %s and floats. */ | |
106 | total_width += 30; | |
107 | switch (*p) | |
108 | { | |
109 | case 'd': | |
110 | case 'i': | |
111 | case 'o': | |
112 | case 'u': | |
113 | case 'x': | |
114 | case 'X': | |
115 | case 'c': | |
116 | (void) va_arg (ap, int); | |
117 | break; | |
118 | case 'f': | |
119 | case 'e': | |
120 | case 'E': | |
121 | case 'g': | |
122 | case 'G': | |
123 | (void) va_arg (ap, double); | |
124 | /* Since an ieee double can have an exponent of 307, we'll | |
125 | make the buffer wide enough to cover the gross case. */ | |
126 | total_width += 307; | |
127 | break; | |
128 | case 's': | |
129 | total_width += strlen (va_arg (ap, char *)); | |
130 | break; | |
131 | case 'p': | |
132 | case 'n': | |
133 | (void) va_arg (ap, char *); | |
134 | break; | |
135 | } | |
df840b63 | 136 | p++; |
252b5132 RH |
137 | } |
138 | } | |
2382c03f DD |
139 | #ifdef va_copy |
140 | va_end (ap); | |
141 | #endif | |
252b5132 RH |
142 | #ifdef TEST |
143 | global_total_width = total_width; | |
144 | #endif | |
585cc78f | 145 | *result = (char *) malloc (total_width); |
252b5132 | 146 | if (*result != NULL) |
2382c03f | 147 | return vsprintf (*result, format, args); |
252b5132 | 148 | else |
5a4e47bd | 149 | return -1; |
252b5132 RH |
150 | } |
151 | ||
152 | int | |
49b1fae4 | 153 | vasprintf (char **result, const char *format, |
252b5132 | 154 | #if defined (_BSD_VA_LIST_) && defined (__FreeBSD__) |
49b1fae4 | 155 | _BSD_VA_LIST_ args) |
252b5132 | 156 | #else |
49b1fae4 | 157 | va_list args) |
252b5132 RH |
158 | #endif |
159 | { | |
2382c03f | 160 | return int_vasprintf (result, format, args); |
252b5132 RH |
161 | } |
162 | ||
163 | #ifdef TEST | |
843f21be | 164 | static void ATTRIBUTE_PRINTF_1 |
49b1fae4 | 165 | checkit (const char *format, ...) |
252b5132 | 166 | { |
252b5132 | 167 | char *result; |
281e9aa6 | 168 | va_list args; |
169 | va_start (args, format); | |
252b5132 | 170 | vasprintf (&result, format, args); |
281e9aa6 | 171 | va_end (args); |
843f21be | 172 | |
74bcd529 | 173 | if (strlen (result) < (size_t) global_total_width) |
252b5132 RH |
174 | printf ("PASS: "); |
175 | else | |
176 | printf ("FAIL: "); | |
177 | printf ("%d %s\n", global_total_width, result); | |
843f21be DD |
178 | |
179 | free (result); | |
252b5132 RH |
180 | } |
181 | ||
49b1fae4 | 182 | extern int main (void); |
74bcd529 | 183 | |
252b5132 | 184 | int |
49b1fae4 | 185 | main (void) |
252b5132 RH |
186 | { |
187 | checkit ("%d", 0x12345678); | |
188 | checkit ("%200d", 5); | |
189 | checkit ("%.300d", 6); | |
190 | checkit ("%100.150d", 7); | |
191 | checkit ("%s", "jjjjjjjjjiiiiiiiiiiiiiiioooooooooooooooooppppppppppppaa\n\ | |
192 | 777777777777777777333333333333366666666666622222222222777777777777733333"); | |
193 | checkit ("%f%s%d%s", 1.0, "foo", 77, "asdjffffffffffffffiiiiiiiiiiixxxxx"); | |
74bcd529 DD |
194 | |
195 | return 0; | |
252b5132 RH |
196 | } |
197 | #endif /* TEST */ |