scc

commit 720fe1d5f39c96fe6b8a334ba50132375d02658b
parent 66e334f5543b1b425aa0f34849357b970d6a746a
Author: Roberto E. Vargas Caballero <k0ga@shike2.com>
Date:   Sun, 10 Dec 2017 09:56:42 +0100

[lib/c] Add sprintf(), snprintf(), vsprintf() and vsnprintf()

Diffstat:
M
lib/c/src/Makefile
 | 
1
+
A
lib/c/src/snprintf.c
 | 
18
++++++++++++++++++
A
lib/c/src/sprintf.c
 | 
17
+++++++++++++++++
A
lib/c/src/vsnprintf.c
 | 
26
++++++++++++++++++++++++++
A
lib/c/src/vsprintf.c
 | 
12
++++++++++++

5 files changed, 74 insertions(+), 0 deletions(-)
diff --git a/lib/c/src/Makefile b/lib/c/src/Makefile
@@ -5,6 +5,7 @@ include ../../../config.mk
 OBJ = bsearch.o qsort.o \
       abs.o __abs.o labs.o __labs.o llabs.o __labs.o \
       perror.o strerror.o \
+      sprintf.o snprintf.o vsprintf.o vsnprintf.o \
       printf.o fprintf.o vfprintf.o \
       fgets.o gets.of fgetc.o fputc.o getchar.o putchar.o \
       fputs.o puts.o fread.o fwrite.o \
diff --git a/lib/c/src/snprintf.c b/lib/c/src/snprintf.c
@@ -0,0 +1,18 @@
+
+#include <stdarg.h>
+#include <stdio.h>
+#undef snprintf
+
+int
+snprintf(char * restrict s, size_t siz, const char * restrict fmt, ...)
+{
+	int r;
+	va_list va;
+
+	va_list va_arg;
+	va_start(va, fmt);
+	r = vsnprintf(s, siz, fmt, va);
+	va_end(va);
+
+	return r;
+}
diff --git a/lib/c/src/sprintf.c b/lib/c/src/sprintf.c
@@ -0,0 +1,17 @@
+
+#include <stdarg.h>
+#include <stdio.h>
+#undef sprintf
+
+int
+sprintf(char * restrict s, const char * restrict fmt, ...)
+{
+	int r;
+
+	va_list va;
+	va_start(va, fmt);
+	r = vsprintf(s, fmt, va);
+	va_end(va);
+
+	return r;
+}
diff --git a/lib/c/src/vsnprintf.c b/lib/c/src/vsnprintf.c
@@ -0,0 +1,26 @@
+
+#include <stdarg.h>
+#include <stdio.h>
+#undef vsnprintf
+
+int
+vsnprintf(char * restrict s, size_t siz, const char * restrict fmt, va_list ap)
+{
+	FILE f;
+	int r;
+
+	f.flag = _IOWRT | _IOSTRG;
+	f.size = siz;
+	f.buf = s;
+	f.wp = s;
+	f.rp = s + siz;
+
+	r = vfprintf(&f, fmt, va);
+	if (s) {
+		if (f.wp == f.rp)
+			--f.wp;
+		*f.wp = '\0';
+	}
+
+	return r;
+}
diff --git a/lib/c/src/vsprintf.c b/lib/c/src/vsprintf.c
@@ -0,0 +1,12 @@
+
+#include <limits.h>
+#include <stdarg.h>
+#include <stdio.h>
+#undef vsprintf
+
+
+int
+vsprintf(char * restrict s, const char * restrict fmt, va_list va)
+{
+	return vsnprintf(s, SIZE_MAX, fmt, va);
+}