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. | |
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> | |
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 | |
55 | not be allocated, zero is returned and @code{NULL} is stored in | |
56 | @code{*@var{resptr}}. | |
57 | ||
58 | @end deftypefn | |
59 | ||
60 | */ | |
74bcd529 DD |
61 | |
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; | |
68 | va_list *args; | |
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 | ||
76 | memcpy ((PTR) &ap, (PTR) args, sizeof (va_list)); | |
77 | ||
78 | while (*p != '\0') | |
79 | { | |
80 | if (*p++ == '%') | |
81 | { | |
82 | while (strchr ("-+ #0", *p)) | |
83 | ++p; | |
84 | if (*p == '*') | |
85 | { | |
86 | ++p; | |
87 | total_width += abs (va_arg (ap, int)); | |
88 | } | |
89 | else | |
74bcd529 | 90 | total_width += strtoul (p, (char **) &p, 10); |
252b5132 RH |
91 | if (*p == '.') |
92 | { | |
93 | ++p; | |
94 | if (*p == '*') | |
95 | { | |
96 | ++p; | |
97 | total_width += abs (va_arg (ap, int)); | |
98 | } | |
99 | else | |
74bcd529 | 100 | total_width += strtoul (p, (char **) &p, 10); |
252b5132 RH |
101 | } |
102 | while (strchr ("hlL", *p)) | |
103 | ++p; | |
104 | /* Should be big enough for any format specifier except %s and floats. */ | |
105 | total_width += 30; | |
106 | switch (*p) | |
107 | { | |
108 | case 'd': | |
109 | case 'i': | |
110 | case 'o': | |
111 | case 'u': | |
112 | case 'x': | |
113 | case 'X': | |
114 | case 'c': | |
115 | (void) va_arg (ap, int); | |
116 | break; | |
117 | case 'f': | |
118 | case 'e': | |
119 | case 'E': | |
120 | case 'g': | |
121 | case 'G': | |
122 | (void) va_arg (ap, double); | |
123 | /* Since an ieee double can have an exponent of 307, we'll | |
124 | make the buffer wide enough to cover the gross case. */ | |
125 | total_width += 307; | |
126 | break; | |
127 | case 's': | |
128 | total_width += strlen (va_arg (ap, char *)); | |
129 | break; | |
130 | case 'p': | |
131 | case 'n': | |
132 | (void) va_arg (ap, char *); | |
133 | break; | |
134 | } | |
df840b63 | 135 | p++; |
252b5132 RH |
136 | } |
137 | } | |
138 | #ifdef TEST | |
139 | global_total_width = total_width; | |
140 | #endif | |
141 | *result = malloc (total_width); | |
142 | if (*result != NULL) | |
143 | return vsprintf (*result, format, *args); | |
144 | else | |
145 | return 0; | |
146 | } | |
147 | ||
148 | int | |
149 | vasprintf (result, format, args) | |
150 | char **result; | |
151 | const char *format; | |
152 | #if defined (_BSD_VA_LIST_) && defined (__FreeBSD__) | |
153 | _BSD_VA_LIST_ args; | |
154 | #else | |
155 | va_list args; | |
156 | #endif | |
157 | { | |
158 | return int_vasprintf (result, format, &args); | |
159 | } | |
160 | ||
161 | #ifdef TEST | |
843f21be DD |
162 | static void ATTRIBUTE_PRINTF_1 |
163 | checkit VPARAMS ((const char *format, ...)) | |
252b5132 | 164 | { |
252b5132 | 165 | char *result; |
843f21be DD |
166 | VA_OPEN (args, format); |
167 | VA_FIXEDARG (args, const char *, format); | |
252b5132 | 168 | vasprintf (&result, format, args); |
843f21be DD |
169 | VA_CLOSE (args); |
170 | ||
74bcd529 | 171 | if (strlen (result) < (size_t) global_total_width) |
252b5132 RH |
172 | printf ("PASS: "); |
173 | else | |
174 | printf ("FAIL: "); | |
175 | printf ("%d %s\n", global_total_width, result); | |
843f21be DD |
176 | |
177 | free (result); | |
252b5132 RH |
178 | } |
179 | ||
74bcd529 DD |
180 | extern int main PARAMS ((void)); |
181 | ||
252b5132 RH |
182 | int |
183 | main () | |
184 | { | |
185 | checkit ("%d", 0x12345678); | |
186 | checkit ("%200d", 5); | |
187 | checkit ("%.300d", 6); | |
188 | checkit ("%100.150d", 7); | |
189 | checkit ("%s", "jjjjjjjjjiiiiiiiiiiiiiiioooooooooooooooooppppppppppppaa\n\ | |
190 | 777777777777777777333333333333366666666666622222222222777777777777733333"); | |
191 | checkit ("%f%s%d%s", 1.0, "foo", 77, "asdjffffffffffffffiiiiiiiiiiixxxxx"); | |
74bcd529 DD |
192 | |
193 | return 0; | |
252b5132 RH |
194 | } |
195 | #endif /* TEST */ |