X-Git-Url: https://pd.if.org/git/?p=pdclib;a=blobdiff_plain;f=functions%2Fstdio%2Fvsnprintf.c;h=761853ff8f627e38a7766e4b79184887f0b666ac;hp=0cccf7a0842d5814953d10c5b53d825104029a2b;hb=da0f3f353d417fed71f358a48d5d5394145e460d;hpb=60dae0fec674240bad2a6acc58dadbd81cbd9c3a

diff --git a/functions/stdio/vsnprintf.c b/functions/stdio/vsnprintf.c
index 0cccf7a..761853f 100644
--- a/functions/stdio/vsnprintf.c
+++ b/functions/stdio/vsnprintf.c
@@ -1,6 +1,4 @@
-/* $Id$ */
-
-/* vsnprintf( char *, size_t, const char *, va_list ap )
+/* 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.
@@ -10,65 +8,64 @@
 #include <stdarg.h>
 
 #ifndef REGTEST
+#include "_PDCLIB_io.h"
+#include <string.h>
+
+struct state {
+    size_t bufrem;
+    char *bufp;
+};
 
-int vsnprintf( char * _PDCLIB_restrict s, size_t n, const char * _PDCLIB_restrict format, _PDCLIB_va_list arg )
+static size_t strout( void *p, const char *buf, size_t sz )
 {
-    /* 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 = 0;
-    status.stream = NULL;
-    va_copy( status.arg, arg );
+    struct state *s = p;
+    size_t copy = s->bufrem >= sz ? sz : s->bufrem;
+    memcpy( s->bufp, buf, copy );
+    s->bufrem -= copy;
+    s->bufp   += copy;
+    return sz;
+}
 
-    while ( *format != '\0' )
+int vsnprintf( char * _PDCLIB_restrict s,
+               size_t n,
+               const char * _PDCLIB_restrict format,
+               _PDCLIB_va_list arg )
+{
+    struct state st;
+    st.bufrem = n;
+    st.bufp   = s;
+    int r = _vcbprintf( &st, strout, format, arg );
+    if ( st.bufrem )
     {
-        const char * rc;
-        if ( ( *format != '%' ) || ( ( rc = _PDCLIB_print( format, &status ) ) == format ) )
-        {
-            /* No conversion specifier, print verbatim */
-            s[ status.i++ ] = *(format++);
-        }
-        else
-        {
-            /* Continue parsing after conversion specifier */
-            format = rc;
-        }
+        *st.bufp = 0;
     }
-    s[ status.i ] = '\0';
-    va_end( status.arg );
-    return status.i;
+
+    return r;
 }
 
 #endif
 
 #ifdef TEST
-#include <_PDCLIB_test.h>
-
-#include <limits.h>
+#define _PDCLIB_FILEID "stdio/vsnprintf.c"
+#define _PDCLIB_STRINGIO
 #include <stdint.h>
-#include <string.h>
-
+#include <stddef.h>
+#include "_PDCLIB_test.h"
 
-static int testprintf( char * s, size_t n, const char * format, ... )
+static int testprintf( char * s, const char * format, ... )
 {
     int i;
     va_list arg;
     va_start( arg, format );
-    i = vsnprintf( s, n, format, arg );
+    i = vsnprintf( s, 100, format, arg );
     va_end( arg );
     return i;
 }
 
 int main( void )
 {
-    char buffer[100];
-#include "printf_testcases.incl"
+    char target[100];
+#include "printf_testcases.h"
     return TEST_RESULTS;
 }