2024-06-22 Bruno Haible <bruno@clisp.org>
+ c-snprintf: Use c-vzsnprintf.
+ * lib/c-snprintf.h (c_snprintf): Move specification to here.
+ * lib/c-snprintf.c: Change license to LGPLv2+.
+ Don't include <stdlib.h>, <string.h>, c-vasnprintf.h. Include
+ <stdint.h>, c-vsnprintf.h.
+ (c_snprintf): Implement based on c_vzsnprintf.
+ * modules/c-snprintf (Depends-on): Add stdint, c-vzsnprintf. Remove
+ c-vasnprintf.
+
c-zsnprintf: New module.
* lib/c-snprintf.h: Change license to LGPLv2+.
(c_zsnprintf): New declaration.
/* Formatted output to strings in C locale.
Copyright (C) 2004, 2006-2024 Free Software Foundation, Inc.
- Written by Simon Josefsson and Paul Eggert.
- Modified for C locale by Ben Pfaff.
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3, or (at your option)
- any later version.
+ This file is free software: you can redistribute it and/or modify
+ it under the terms of the GNU Lesser General Public License as
+ published by the Free Software Foundation; either version 2.1 of the
+ License, or (at your option) any later version.
- This program is distributed in the hope that it will be useful,
+ This file 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 General Public License for more details.
+ GNU Lesser General Public License for more details.
- You should have received a copy of the GNU General Public License along
- with this program; if not, see <https://www.gnu.org/licenses/>. */
+ You should have received a copy of the GNU Lesser General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>. */
#include <config.h>
#include <errno.h>
#include <limits.h>
#include <stdarg.h>
-#include <stdlib.h>
-#include <string.h>
+#include <stdint.h>
-#include "c-vasnprintf.h"
+#include "c-vsnprintf.h"
-/* Print formatted output to string STR. Similar to sprintf, but
- additional length SIZE limit how much is written into STR. Returns
- string length of formatted string (which may be larger than SIZE).
- STR may be NULL, in which case nothing will be written. On error,
- return a negative value.
-
- Formatting takes place in the C locale, that is, the decimal point
- used in floating-point formatting directives is always '.'. */
int
c_snprintf (char *str, size_t size, const char *format, ...)
{
- char *output;
- size_t len;
- size_t lenbuf = size;
va_list args;
+ ptrdiff_t ret;
va_start (args, format);
- output = c_vasnprintf (str, &lenbuf, format, args);
- len = lenbuf;
+ ret = c_vzsnprintf (str, size, format, args);
va_end (args);
- if (!output)
- return -1;
-
- if (output != str)
- {
- if (size)
- {
- size_t pruned_len = (len < size ? len : size - 1);
- memcpy (str, output, pruned_len);
- str[pruned_len] = '\0';
- }
-
- free (output);
- }
-
- if (INT_MAX < len)
+#if PTRDIFF_MAX > INT_MAX
+ if (ret > INT_MAX)
{
errno = EOVERFLOW;
return -1;
}
+#endif
- return len;
+ return ret;
}
const char *format, ...)
_GL_ATTRIBUTE_FORMAT ((_GL_ATTRIBUTE_SPEC_PRINTF_STANDARD, 3, 4));
+/* Prints formatted output to string STR. Similar to sprintf, but the
+ additional parameter SIZE limits how much is written into STR.
+ STR may be NULL, in which case nothing will be written.
+ Returns the string length of the formatted string (which may be larger
+ than SIZE). Upon failure, returns -1 with errno set.
+
+ Formatting takes place in the C locale, that is, the decimal point
+ used in floating-point formatting directives is always '.'. */
extern int c_snprintf (char *restrict str, size_t size,
const char *format, ...)
_GL_ATTRIBUTE_FORMAT ((_GL_ATTRIBUTE_SPEC_PRINTF_STANDARD, 3, 4));