1 /* Like vsprintf but provides a pointer to malloc'd storage, which must 2 be freed by the caller. 3 Copyright (C) 1994, 2003, 2011, 2013 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 not, write 18 to the Free Software Foundation, Inc., 51 Franklin Street - Fifth 19 Floor, Boston, MA 02110-1301, USA. */ 20 21 #ifdef HAVE_CONFIG_H 22 #include "config.h" 23 #endif 24 #include <ansidecl.h> 25 #include <stdarg.h> 26 #if !defined (va_copy) && defined (__va_copy) 27 # define va_copy(d,s) __va_copy((d),(s)) 28 #endif 29 #include <stdio.h> 30 #ifdef HAVE_STRING_H 31 #include <string.h> 32 #endif 33 #ifdef HAVE_STDLIB_H 34 #include <stdlib.h> 35 #else 36 extern PTR malloc (); 37 #endif 38 #include "libiberty.h" 39 #include "vprintf-support.h" 40 41 #ifdef TEST 42 int global_total_width; 43 #endif 44 45 /* 46 47 @deftypefn Extension int vasprintf (char **@var{resptr}, @ 48 const char *@var{format}, va_list @var{args}) 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, minus one is returned and @code{NULL} is stored in 56 @code{*@var{resptr}}. 57 58 @end deftypefn 59 60 */ 61 62 static int int_vasprintf (char **, const char *, va_list); 63 64 static int 65 int_vasprintf (char **result, const char *format, va_list args) 66 { 67 int total_width = libiberty_vprintf_buffer_size (format, args); 68 #ifdef TEST 69 global_total_width = total_width; 70 #endif 71 *result = (char *) malloc (total_width); 72 if (*result != NULL) 73 return vsprintf (*result, format, args); 74 else 75 return -1; 76 } 77 78 int 79 vasprintf (char **result, const char *format, 80 #if defined (_BSD_VA_LIST_) && defined (__FreeBSD__) 81 _BSD_VA_LIST_ args) 82 #else 83 va_list args) 84 #endif 85 { 86 return int_vasprintf (result, format, args); 87 } 88 89 #ifdef TEST 90 static void ATTRIBUTE_PRINTF_1 91 checkit (const char *format, ...) 92 { 93 char *result; 94 va_list args; 95 va_start (args, format); 96 vasprintf (&result, format, args); 97 va_end (args); 98 99 if (strlen (result) < (size_t) global_total_width) 100 printf ("PASS: "); 101 else 102 printf ("FAIL: "); 103 printf ("%d %s\n", global_total_width, result); 104 105 free (result); 106 } 107 108 extern int main (void); 109 110 int 111 main (void) 112 { 113 checkit ("%d", 0x12345678); 114 checkit ("%200d", 5); 115 checkit ("%.300d", 6); 116 checkit ("%100.150d", 7); 117 checkit ("%s", "jjjjjjjjjiiiiiiiiiiiiiiioooooooooooooooooppppppppppppaa\n\ 118 777777777777777777333333333333366666666666622222222222777777777777733333"); 119 checkit ("%f%s%d%s", 1.0, "foo", 77, "asdjffffffffffffffiiiiiiiiiiixxxxx"); 120 121 return 0; 122 } 123 #endif /* TEST */ 124
