1 /* GLIB - Library of useful routines for C programming
2 * Copyright (C) 1995-1997, 2002 Peter Mattis, Red Hat, Inc.
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
23 #define _GNU_SOURCE /* For vasprintf */
32 #include "gprintfint.h"
38 * @format: a standard printf() format string, but notice
39 * <link linkend="string-precision">string precision pitfalls</link>.
40 * @Varargs: the arguments to insert in the output.
42 * An implementation of the standard printf() function which supports
43 * positional parameters, as specified in the Single Unix Specification.
45 * Returns: the number of bytes printed.
50 g_printf (gchar const *format,
56 va_start (args, format);
57 retval = g_vprintf (format, args);
65 * @file: the stream to write to.
66 * @format: a standard printf() format string, but notice
67 * <link linkend="string-precision">string precision pitfalls</link>.
68 * @Varargs: the arguments to insert in the output.
70 * An implementation of the standard fprintf() function which supports
71 * positional parameters, as specified in the Single Unix Specification.
73 * Returns: the number of bytes printed.
78 g_fprintf (FILE *file,
85 va_start (args, format);
86 retval = g_vfprintf (file, format, args);
94 * @string: A pointer to a memory buffer to contain the resulting string. It
95 * is up to the caller to ensure that the allocated buffer is large
96 * enough to hold the formatted result
97 * @format: a standard printf() format string, but notice
98 * <link linkend="string-precision">string precision pitfalls</link>.
99 * @Varargs: the arguments to insert in the output.
101 * An implementation of the standard sprintf() function which supports
102 * positional parameters, as specified in the Single Unix Specification.
104 * Returns: the number of bytes printed.
109 g_sprintf (gchar *string,
116 va_start (args, format);
117 retval = g_vsprintf (string, format, args);
125 * @string: the buffer to hold the output.
126 * @n: the maximum number of bytes to produce (including the
127 * terminating nul character).
128 * @format: a standard printf() format string, but notice
129 * <link linkend="string-precision">string precision pitfalls</link>.
130 * @Varargs: the arguments to insert in the output.
132 * A safer form of the standard sprintf() function. The output is guaranteed
133 * to not exceed @n characters (including the terminating nul character), so
134 * it is easy to ensure that a buffer overflow cannot occur.
136 * See also g_strdup_printf().
138 * In versions of GLib prior to 1.2.3, this function may return -1 if the
139 * output was truncated, and the truncated string may not be nul-terminated.
140 * In versions prior to 1.3.12, this function returns the length of the output
143 * The return value of g_snprintf() conforms to the snprintf()
144 * function as standardized in ISO C99. Note that this is different from
145 * traditional snprintf(), which returns the length of the output string.
147 * The format string may contain positional parameters, as specified in
148 * the Single Unix Specification.
150 * Returns: the number of bytes which would be produced if the buffer
154 g_snprintf (gchar *string,
162 va_start (args, format);
163 retval = g_vsnprintf (string, n, format, args);
171 * @format: a standard printf() format string, but notice
172 * <link linkend="string-precision">string precision pitfalls</link>.
173 * @args: the list of arguments to insert in the output.
175 * An implementation of the standard vprintf() function which supports
176 * positional parameters, as specified in the Single Unix Specification.
178 * Returns: the number of bytes printed.
183 g_vprintf (gchar const *format,
186 g_return_val_if_fail (format != NULL, -1);
188 return _g_vprintf (format, args);
193 * @file: the stream to write to.
194 * @format: a standard printf() format string, but notice
195 * <link linkend="string-precision">string precision pitfalls</link>.
196 * @args: the list of arguments to insert in the output.
198 * An implementation of the standard fprintf() function which supports
199 * positional parameters, as specified in the Single Unix Specification.
201 * Returns: the number of bytes printed.
206 g_vfprintf (FILE *file,
210 g_return_val_if_fail (format != NULL, -1);
212 return _g_vfprintf (file, format, args);
217 * @string: the buffer to hold the output.
218 * @format: a standard printf() format string, but notice
219 * <link linkend="string-precision">string precision pitfalls</link>.
220 * @args: the list of arguments to insert in the output.
222 * An implementation of the standard vsprintf() function which supports
223 * positional parameters, as specified in the Single Unix Specification.
225 * Returns: the number of bytes printed.
230 g_vsprintf (gchar *string,
234 g_return_val_if_fail (string != NULL, -1);
235 g_return_val_if_fail (format != NULL, -1);
237 return _g_vsprintf (string, format, args);
242 * @string: the buffer to hold the output.
243 * @n: the maximum number of bytes to produce (including the
244 * terminating nul character).
245 * @format: a standard printf() format string, but notice
246 * <link linkend="string-precision">string precision pitfalls</link>.
247 * @args: the list of arguments to insert in the output.
249 * A safer form of the standard vsprintf() function. The output is guaranteed
250 * to not exceed @n characters (including the terminating nul character), so
251 * it is easy to ensure that a buffer overflow cannot occur.
253 * See also g_strdup_vprintf().
255 * In versions of GLib prior to 1.2.3, this function may return -1 if the
256 * output was truncated, and the truncated string may not be nul-terminated.
257 * In versions prior to 1.3.12, this function returns the length of the output
260 * The return value of g_vsnprintf() conforms to the vsnprintf() function
261 * as standardized in ISO C99. Note that this is different from traditional
262 * vsnprintf(), which returns the length of the output string.
264 * The format string may contain positional parameters, as specified in
265 * the Single Unix Specification.
267 * Returns: the number of bytes which would be produced if the buffer
271 g_vsnprintf (gchar *string,
276 g_return_val_if_fail (n == 0 || string != NULL, -1);
277 g_return_val_if_fail (format != NULL, -1);
279 return _g_vsnprintf (string, n, format, args);
284 * @string: the return location for the newly-allocated string.
285 * @format: a standard printf() format string, but notice
286 * <link linkend="string-precision">string precision pitfalls</link>.
287 * @args: the list of arguments to insert in the output.
289 * An implementation of the GNU vasprintf() function which supports
290 * positional parameters, as specified in the Single Unix Specification.
291 * This function is similar to g_vsprintf(), except that it allocates a
292 * string to hold the output, instead of putting the output in a buffer
293 * you allocate in advance.
295 * Returns: the number of bytes printed.
300 g_vasprintf (gchar **string,
305 g_return_val_if_fail (string != NULL, -1);
307 #if !defined(HAVE_GOOD_PRINTF)
309 len = _g_gnulib_vasprintf (string, format, args);
313 #elif defined (HAVE_VASPRINTF)
315 len = vasprintf (string, format, args);
318 else if (!g_mem_is_system_malloc ())
320 /* vasprintf returns malloc-allocated memory */
321 gchar *string1 = g_strndup (*string, len);
331 G_VA_COPY (args2, args);
333 *string = g_new (gchar, g_printf_string_upper_bound (format, args));
335 len = _g_vsprintf (*string, format, args2);
343 #define __G_PRINTF_C__
344 #include "galiasdef.c"