diff options
author | tcsullivan <tullivan99@gmail.com> | 2018-11-17 13:02:57 -0500 |
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committer | tcsullivan <tullivan99@gmail.com> | 2018-11-17 13:02:57 -0500 |
commit | c6ef89664b8c0d7aa85bddd5c7014aa6df82cbe7 (patch) | |
tree | d1f9d09412a46bdf4344fe30392455070a72993d /src/pdclib/functions/stdio/vsnprintf.c | |
parent | db38c4b9dac461de0ed75bf6d079dacba1b31bc9 (diff) |
added pdclib, removed sash
Diffstat (limited to 'src/pdclib/functions/stdio/vsnprintf.c')
-rw-r--r-- | src/pdclib/functions/stdio/vsnprintf.c | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/src/pdclib/functions/stdio/vsnprintf.c b/src/pdclib/functions/stdio/vsnprintf.c new file mode 100644 index 0000000..e57e682 --- /dev/null +++ b/src/pdclib/functions/stdio/vsnprintf.c @@ -0,0 +1,80 @@ +/* vsnprintf( char *, size_t, const char *, va_list ) + + This file is part of the Public Domain C Library (PDCLib). + Permission is granted to use, modify, and / or redistribute at will. +*/ + +#include <stdio.h> +#include <stdarg.h> + +#ifndef REGTEST + +int vsnprintf( char * _PDCLIB_restrict s, size_t n, const char * _PDCLIB_restrict format, _PDCLIB_va_list arg ) +{ + /* TODO: This function should interpret format as multibyte characters. */ + struct _PDCLIB_status_t status; + status.base = 0; + status.flags = 0; + status.n = n; + status.i = 0; + status.current = 0; + status.s = s; + status.width = 0; + status.prec = EOF; + status.stream = NULL; + va_copy( status.arg, arg ); + + while ( *format != '\0' ) + { + const char * rc; + if ( ( *format != '%' ) || ( ( rc = _PDCLIB_print( format, &status ) ) == format ) ) + { + /* No conversion specifier, print verbatim */ + if ( status.i < n ) + { + s[ status.i ] = *format; + } + status.i++; + format++; + } + else + { + /* Continue parsing after conversion specifier */ + format = rc; + } + } + if ( status.i < n ) + { + s[ status.i ] = '\0'; + } + va_end( status.arg ); + return status.i; +} + +#endif + +#ifdef TEST +#define _PDCLIB_FILEID "stdio/vsnprintf.c" +#define _PDCLIB_STRINGIO +#include <stdint.h> +#include <stddef.h> +#include "_PDCLIB_test.h" + +static int testprintf( char * s, const char * format, ... ) +{ + int i; + va_list arg; + va_start( arg, format ); + i = vsnprintf( s, 100, format, arg ); + va_end( arg ); + return i; +} + +int main( void ) +{ + char target[100]; +#include "printf_testcases.h" + return TEST_RESULTS; +} + +#endif |