diff --git a/util/ChangeLog b/util/ChangeLog index a50763a6f..7264d0f64 100644 --- a/util/ChangeLog +++ b/util/ChangeLog @@ -1,3 +1,7 @@ +2004-10-15 Werner Koch + + * vasprintf.c: New. Taken from gnupg 1.9. + 2004-10-14 Werner Koch * iobuf.c (iobuf_get_fd): Removed double check on directfp and diff --git a/util/vasprintf.c b/util/vasprintf.c new file mode 100644 index 000000000..9efea33f2 --- /dev/null +++ b/util/vasprintf.c @@ -0,0 +1,169 @@ +/* Like vsprintf but provides a pointer to malloc'd storage, which must + be freed by the caller. + Copyright (C) 1994, 2002 Free Software Foundation, Inc. + +This file is part of the libiberty library. +Libiberty is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public +License as published by the Free Software Foundation; either +version 2 of the License, or (at your option) any later version. + +Libiberty is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with libiberty; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. */ + +#ifdef HAVE_CONFIG_H +#include +#endif +#include +#include +#include +#include + +#ifdef TEST +int global_total_width; +#endif + +int +vasprintf (char **result, const char *format, va_list args) +{ + const char *p = format; + /* Add one to make sure that it is never zero, which might cause malloc + to return NULL. */ + int total_width = strlen (format) + 1; + va_list ap; + +#ifdef va_copy + va_copy (ap, args); +#else +#ifdef __va_copy + __va_copy (ap, args); +#else + memcpy (&ap, args, sizeof (va_list)); +#endif /* __va_copy */ +#endif /* va_copy */ + + while (*p != '\0') + { + if (*p++ == '%') + { + while (strchr ("-+ #0", *p)) + ++p; + if (*p == '*') + { + ++p; + total_width += abs (va_arg (ap, int)); + } + else + total_width += strtoul (p, (char**)&p, 10); + if (*p == '.') + { + ++p; + if (*p == '*') + { + ++p; + total_width += abs (va_arg (ap, int)); + } + else + total_width += strtoul (p, (char**)&p, 10); + } + while (strchr ("hlL", *p)) + ++p; + /* Should be big enough for any format specifier except %s + and floats. */ + total_width += 30; + switch (*p) + { + case 'd': + case 'i': + case 'o': + case 'u': + case 'x': + case 'X': + case 'c': + (void) va_arg (ap, int); + break; + case 'f': + case 'e': + case 'E': + case 'g': + case 'G': + (void) va_arg (ap, double); + /* Since an ieee double can have an exponent of 307, we'll + make the buffer wide enough to cover the gross case. */ + total_width += 307; + break; + case 's': + { + char *tmp = va_arg (ap, char *); + if (tmp) + total_width += strlen (tmp); + else /* in case the vsprintf does prints a text */ + total_width += 25; /* e.g. "(null pointer reference)" */ + } + break; + case 'p': + case 'n': + (void) va_arg (ap, char *); + break; + } + } + } +#ifdef TEST + global_total_width = total_width; +#endif + *result = malloc (total_width); + if (*result != NULL) + return vsprintf (*result, format, args); + else + return 0; +} + + +int +asprintf (char **buf, const char *fmt, ...) +{ + int status; + va_list ap; + + va_start (ap, fmt); + status = vasprintf (buf, fmt, ap); + va_end (ap); + return status; +} + + +#ifdef TEST +void +checkit (const char* format, ...) +{ + va_list args; + char *result; + + va_start (args, format); + vasprintf (&result, format, args); + if (strlen (result) < global_total_width) + printf ("PASS: "); + else + printf ("FAIL: "); + printf ("%d %s\n", global_total_width, result); +} + +int +main (void) +{ + checkit ("%d", 0x12345678); + checkit ("%200d", 5); + checkit ("%.300d", 6); + checkit ("%100.150d", 7); + checkit ("%s", "jjjjjjjjjiiiiiiiiiiiiiiioooooooooooooooooppppppppppppaa\n\ +777777777777777777333333333333366666666666622222222222777777777777733333"); + checkit ("%f%s%d%s", 1.0, "foo", 77, "asdjffffffffffffffiiiiiiiiiiixxxxx"); +} +#endif /* TEST */