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. | |
5a4e47bd | 3 | Copyright (C) 1994, 2003 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 | |
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> | |
843f21be | 31 | #ifdef HAVE_STRING_H |
252b5132 | 32 | #include <string.h> |
843f21be | 33 | #endif |
74bcd529 DD |
34 | #ifdef HAVE_STDLIB_H |
35 | #include <stdlib.h> | |
36 | #else | |
37 | extern unsigned long strtoul (); | |
38 | extern PTR malloc (); | |
39 | #endif | |
40 | #include "libiberty.h" | |
252b5132 RH |
41 | |
42 | #ifdef TEST | |
43 | int global_total_width; | |
44 | #endif | |
45 | ||
ba19b94f DD |
46 | /* |
47 | ||
5d852400 | 48 | @deftypefn Extension int vasprintf (char **@var{resptr}, 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 | |
2382c03f | 62 | static int int_vasprintf PARAMS ((char **, const char *, va_list)); |
252b5132 RH |
63 | |
64 | static int | |
65 | int_vasprintf (result, format, args) | |
66 | char **result; | |
67 | const char *format; | |
2382c03f | 68 | va_list args; |
252b5132 RH |
69 | { |
70 | const char *p = format; | |
71 | /* Add one to make sure that it is never zero, which might cause malloc | |
72 | to return NULL. */ | |
73 | int total_width = strlen (format) + 1; | |
74 | va_list ap; | |
75 | ||
2382c03f DD |
76 | #ifdef va_copy |
77 | va_copy (ap, args); | |
78 | #else | |
79 | memcpy ((PTR) &ap, (PTR) &args, sizeof (va_list)); | |
80 | #endif | |
252b5132 RH |
81 | |
82 | while (*p != '\0') | |
83 | { | |
84 | if (*p++ == '%') | |
85 | { | |
86 | while (strchr ("-+ #0", *p)) | |
87 | ++p; | |
88 | if (*p == '*') | |
89 | { | |
90 | ++p; | |
91 | total_width += abs (va_arg (ap, int)); | |
92 | } | |
93 | else | |
74bcd529 | 94 | total_width += strtoul (p, (char **) &p, 10); |
252b5132 RH |
95 | if (*p == '.') |
96 | { | |
97 | ++p; | |
98 | if (*p == '*') | |
99 | { | |
100 | ++p; | |
101 | total_width += abs (va_arg (ap, int)); | |
102 | } | |
103 | else | |
74bcd529 | 104 | total_width += strtoul (p, (char **) &p, 10); |
252b5132 RH |
105 | } |
106 | while (strchr ("hlL", *p)) | |
107 | ++p; | |
108 | /* Should be big enough for any format specifier except %s and floats. */ | |
109 | total_width += 30; | |
110 | switch (*p) | |
111 | { | |
112 | case 'd': | |
113 | case 'i': | |
114 | case 'o': | |
115 | case 'u': | |
116 | case 'x': | |
117 | case 'X': | |
118 | case 'c': | |
119 | (void) va_arg (ap, int); | |
120 | break; | |
121 | case 'f': | |
122 | case 'e': | |
123 | case 'E': | |
124 | case 'g': | |
125 | case 'G': | |
126 | (void) va_arg (ap, double); | |
127 | /* Since an ieee double can have an exponent of 307, we'll | |
128 | make the buffer wide enough to cover the gross case. */ | |
129 | total_width += 307; | |
130 | break; | |
131 | case 's': | |
132 | total_width += strlen (va_arg (ap, char *)); | |
133 | break; | |
134 | case 'p': | |
135 | case 'n': | |
136 | (void) va_arg (ap, char *); | |
137 | break; | |
138 | } | |
df840b63 | 139 | p++; |
252b5132 RH |
140 | } |
141 | } | |
2382c03f DD |
142 | #ifdef va_copy |
143 | va_end (ap); | |
144 | #endif | |
252b5132 RH |
145 | #ifdef TEST |
146 | global_total_width = total_width; | |
147 | #endif | |
585cc78f | 148 | *result = (char *) malloc (total_width); |
252b5132 | 149 | if (*result != NULL) |
2382c03f | 150 | return vsprintf (*result, format, args); |
252b5132 | 151 | else |
5a4e47bd | 152 | return -1; |
252b5132 RH |
153 | } |
154 | ||
155 | int | |
156 | vasprintf (result, format, args) | |
157 | char **result; | |
158 | const char *format; | |
159 | #if defined (_BSD_VA_LIST_) && defined (__FreeBSD__) | |
160 | _BSD_VA_LIST_ args; | |
161 | #else | |
162 | va_list args; | |
163 | #endif | |
164 | { | |
2382c03f | 165 | return int_vasprintf (result, format, args); |
252b5132 RH |
166 | } |
167 | ||
168 | #ifdef TEST | |
843f21be DD |
169 | static void ATTRIBUTE_PRINTF_1 |
170 | checkit VPARAMS ((const char *format, ...)) | |
252b5132 | 171 | { |
252b5132 | 172 | char *result; |
843f21be DD |
173 | VA_OPEN (args, format); |
174 | VA_FIXEDARG (args, const char *, format); | |
252b5132 | 175 | vasprintf (&result, format, args); |
843f21be DD |
176 | VA_CLOSE (args); |
177 | ||
74bcd529 | 178 | if (strlen (result) < (size_t) global_total_width) |
252b5132 RH |
179 | printf ("PASS: "); |
180 | else | |
181 | printf ("FAIL: "); | |
182 | printf ("%d %s\n", global_total_width, result); | |
843f21be DD |
183 | |
184 | free (result); | |
252b5132 RH |
185 | } |
186 | ||
74bcd529 DD |
187 | extern int main PARAMS ((void)); |
188 | ||
252b5132 RH |
189 | int |
190 | main () | |
191 | { | |
192 | checkit ("%d", 0x12345678); | |
193 | checkit ("%200d", 5); | |
194 | checkit ("%.300d", 6); | |
195 | checkit ("%100.150d", 7); | |
196 | checkit ("%s", "jjjjjjjjjiiiiiiiiiiiiiiioooooooooooooooooppppppppppppaa\n\ | |
197 | 777777777777777777333333333333366666666666622222222222777777777777733333"); | |
198 | checkit ("%f%s%d%s", 1.0, "foo", 77, "asdjffffffffffffffiiiiiiiiiiixxxxx"); | |
74bcd529 DD |
199 | |
200 | return 0; | |
252b5132 RH |
201 | } |
202 | #endif /* TEST */ |