mdw@git.distorted.org.uk Git - disorder/blob - lib/asprintf.c

   1 /*
   2  * This file is part of DisOrder
   3  * Copyright (C) 2004-2009 Richard Kettlewell
   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 3 of the License, or
   8  * (at your option) 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, see <http://www.gnu.org/licenses/>.
  17  */
  18 /** @file lib/asprintf.c @brief printf() workalikes */
  19
  20 #include "common.h"
  21
  22 #include <stdarg.h>
  23 #include <stddef.h>
  24 #include <errno.h>
  25
  26 #include "printf.h"
  27 #include "sink.h"
  28 #include "mem.h"
  29 #include "vector.h"
  30 #include "log.h"
  31
  32 /** @brief vasprintf() workalike without encoding errors
  33  *
  34  * This acts like vasprintf() except that it does not throw an error
  35  * if you use a string outside the current locale's encoding rules,
  36  * and it uses the memory allocation calls from @ref mem.h.
  37  */
  38 int byte_vasprintf(char **ptrp,
  39                    const char *fmt,
  40                    va_list ap) {
  41   struct sink *s;
  42   struct dynstr d;
  43   int n;
  44
  45   dynstr_init(&d);
  46   s = sink_dynstr(&d);
  47   n = byte_vsinkprintf(s, fmt, ap);
  48   xfree(s);
  49   if(n >= 0) {
  50     dynstr_terminate(&d);
  51     *ptrp = d.vec;
  52   }
  53   return n;
  54 }
  55
  56 /** @brief asprintf() workalike without encoding errors
  57  *
  58  * This acts like asprintf() except that it does not throw an error
  59  * if you use a string outside the current locale's encoding rules,
  60  * and it uses the memory allocation calls from @ref mem.h.
  61  */
  62 int byte_asprintf(char **ptrp,
  63                   const char *fmt,
  64                   ...) {
  65   int n;
  66   va_list ap;
  67
  68   va_start(ap, fmt);
  69   n = byte_vasprintf(ptrp, fmt, ap);
  70   va_end(ap);
  71   return n;
  72 }
  73
  74 /** @brief asprintf() workalike without encoding errors
  75  *
  76  * This acts like asprintf() except that it does not throw an error if
  77  * you use a string outside the current locale's encoding rules; it
  78  * uses the memory allocation calls from @ref mem.h; and it terminates
  79  * the program on error.
  80  */
  81 int byte_xasprintf(char **ptrp,
  82                    const char *fmt,
  83                    ...) {
  84   int n;
  85   va_list ap;
  86
  87   va_start(ap, fmt);
  88   n = byte_xvasprintf(ptrp, fmt, ap);
  89   va_end(ap);
  90   return n;
  91 }
  92
  93 /** @brief vasprintf() workalike without encoding errors
  94  *
  95  * This acts like vasprintf() except that it does not throw an error
  96  * if you use a string outside the current locale's encoding rules; it
  97  * uses the memory allocation calls from @ref mem.h; and it terminates
  98  * the program on error.
  99  */
 100 int byte_xvasprintf(char **ptrp,
 101                     const char *fmt,
 102                     va_list ap) {
 103   int n;
 104
 105   if((n = byte_vasprintf(ptrp, fmt, ap)) < 0)
 106     disorder_fatal(errno, "error calling byte_vasprintf");
 107   return n;
 108 }
 109
 110 /*
 111 Local Variables:
 112 c-basic-offset:2
 113 comment-column:40
 114 End:
 115 */