Annotation of embedaddon/lrzsz/lib/vasprintf.c, revision 1.1
1.1 ! misho 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 program is free software; you can redistribute it and/or modify
! 6: it under the terms of the GNU General Public License as published by
! 7: the Free Software Foundation; either version 2, or (at your option)
! 8: any later version.
! 9:
! 10: This program is distributed in the hope that it will be useful,
! 11: but WITHOUT ANY WARRANTY; without even the implied warranty of
! 12: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
! 13: GNU General Public License for more details.
! 14:
! 15: You should have received a copy of the GNU General Public License
! 16: along with this program; if not, write to the Free Software
! 17: Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
! 18:
! 19: #ifdef HAVE_CONFIG_H
! 20: # include <config.h>
! 21: #endif
! 22:
! 23: #include <stdio.h>
! 24: #include <stdlib.h>
! 25: #include <string.h>
! 26:
! 27: #if __STDC__
! 28: # include <stdarg.h>
! 29: #else
! 30: # include <varargs.h>
! 31: #endif
! 32:
! 33: #ifdef TEST
! 34: int global_total_width;
! 35: #endif
! 36:
! 37: /* unsigned long strtoul (); */
! 38: /* char *malloc (); */
! 39:
! 40: static int
! 41: int_vasprintf (result, format, args)
! 42: char **result;
! 43: const char *format;
! 44: va_list *args;
! 45: {
! 46: const char *p = format;
! 47: /* Add one to make sure that it is never zero, which might cause malloc
! 48: to return NULL. */
! 49: int total_width = strlen (format) + 1;
! 50: va_list ap;
! 51:
! 52: memcpy (&ap, args, sizeof (va_list));
! 53:
! 54: while (*p != '\0')
! 55: {
! 56: if (*p++ == '%')
! 57: {
! 58: while (strchr ("-+ #0", *p))
! 59: ++p;
! 60: if (*p == '*')
! 61: {
! 62: ++p;
! 63: total_width += abs (va_arg (ap, int));
! 64: }
! 65: else
! 66: total_width += strtoul (p, &p, 10);
! 67: if (*p == '.')
! 68: {
! 69: ++p;
! 70: if (*p == '*')
! 71: {
! 72: ++p;
! 73: total_width += abs (va_arg (ap, int));
! 74: }
! 75: else
! 76: total_width += strtoul (p, &p, 10);
! 77: }
! 78: while (strchr ("hlL", *p))
! 79: ++p;
! 80: /* Should be big enough for any format specifier except %s. */
! 81: total_width += 30;
! 82: switch (*p)
! 83: {
! 84: case 'd':
! 85: case 'i':
! 86: case 'o':
! 87: case 'u':
! 88: case 'x':
! 89: case 'X':
! 90: case 'c':
! 91: (void) va_arg (ap, int);
! 92: break;
! 93: case 'f':
! 94: case 'e':
! 95: case 'E':
! 96: case 'g':
! 97: case 'G':
! 98: (void) va_arg (ap, double);
! 99: break;
! 100: case 's':
! 101: total_width += strlen (va_arg (ap, char *));
! 102: break;
! 103: case 'p':
! 104: case 'n':
! 105: (void) va_arg (ap, char *);
! 106: break;
! 107: }
! 108: }
! 109: }
! 110: #ifdef TEST
! 111: global_total_width = total_width;
! 112: #endif
! 113: *result = malloc (total_width);
! 114: if (*result != NULL)
! 115: return vsprintf (*result, format, *args);
! 116: else
! 117: return 0;
! 118: }
! 119:
! 120: int
! 121: vasprintf (result, format, args)
! 122: char **result;
! 123: const char *format;
! 124: va_list args;
! 125: {
! 126: return int_vasprintf (result, format, &args);
! 127: }
! 128:
! 129: int
! 130: asprintf
! 131: #if __STDC__
! 132: (char **result, const char *format, ...)
! 133: #else
! 134: (result, va_alist)
! 135: char **result;
! 136: va_dcl
! 137: #endif
! 138: {
! 139: va_list args;
! 140: int done;
! 141:
! 142: #if __STDC__
! 143: va_start (args, format);
! 144: #else
! 145: char *format;
! 146: va_start (args);
! 147: format = va_arg (args, char *);
! 148: #endif
! 149: done = vasprintf (result, format, args);
! 150: va_end (args);
! 151:
! 152: return done;
! 153: }
! 154:
! 155: #ifdef TEST
! 156: void
! 157: checkit
! 158: #if __STDC__
! 159: (const char* format, ...)
! 160: #else
! 161: (va_alist)
! 162: va_dcl
! 163: #endif
! 164: {
! 165: va_list args;
! 166: char *result;
! 167:
! 168: #if __STDC__
! 169: va_start (args, format);
! 170: #else
! 171: char *format;
! 172: va_start (args);
! 173: format = va_arg (args, char *);
! 174: #endif
! 175: vasprintf (&result, format, args);
! 176: if (strlen (result) < global_total_width)
! 177: printf ("PASS: ");
! 178: else
! 179: printf ("FAIL: ");
! 180: printf ("%d %s\n", global_total_width, result);
! 181: }
! 182:
! 183: int
! 184: main ()
! 185: {
! 186: checkit ("%d", 0x12345678);
! 187: checkit ("%200d", 5);
! 188: checkit ("%.300d", 6);
! 189: checkit ("%100.150d", 7);
! 190: checkit ("%s", "jjjjjjjjjiiiiiiiiiiiiiiioooooooooooooooooppppppppppppaa\n\
! 191: 777777777777777777333333333333366666666666622222222222777777777777733333");
! 192: checkit ("%f%s%d%s", 1.0, "foo", 77, "asdjffffffffffffffiiiiiiiiiiixxxxx");
! 193: }
! 194: #endif /* TEST */
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