[Tinyx-devel] [PATCH] libc: add the strcmp on libc.

[David C. <da...@gm...>]

Signed-off-by: David Cohen <da...@gm...>
---
 Makefile                    |    2 +-
 include/tinyx/libc/string.h |    6 ++++++
 lib/Makefile                |    1 +
 lib/libc/Makefile           |    1 +
 lib/libc/string.c           |   13 +++++++++++++
 5 files changed, 22 insertions(+), 1 deletions(-)
 create mode 100644 include/tinyx/libc/string.h
 create mode 100644 lib/Makefile
 create mode 100644 lib/libc/Makefile
 create mode 100644 lib/libc/string.c

diff --git a/Makefile b/Makefile
index bae3b3f..0ca9772 100644
--- a/Makefile
+++ b/Makefile
@@ -30,7 +30,7 @@ all-sources = $(shell git-ls-files)
 
 export ARCH AS LD CC AR NM STRIP OBJCOPY OBJDUMP AWK CFLAGS PYTHON INCLUDES
 
-tinyx.dirs = arch/ kernel/
+tinyx.dirs = lib/ arch/ kernel/
 
 tinyx.objs = $(patsubst %/, %/tyx_part.o, $(tinyx.dirs))
 
diff --git a/include/tinyx/libc/string.h b/include/tinyx/libc/string.h
new file mode 100644
index 0000000..2455bcc
--- /dev/null
+++ b/include/tinyx/libc/string.h
@@ -0,0 +1,6 @@
+#ifndef __TINYX_LIBC_STRING_H
+#define __TINYX_LIBC_STRING_H
+
+int strcmp(const char *str1, const char *str2);
+
+#endif /* __TINYX_LIBC_STRING_H */
diff --git a/lib/Makefile b/lib/Makefile
new file mode 100644
index 0000000..3231475
--- /dev/null
+++ b/lib/Makefile
@@ -0,0 +1 @@
+obj-y = libc/
diff --git a/lib/libc/Makefile b/lib/libc/Makefile
new file mode 100644
index 0000000..f6fde72
--- /dev/null
+++ b/lib/libc/Makefile
@@ -0,0 +1 @@
+obj-y += string.o
diff --git a/lib/libc/string.c b/lib/libc/string.c
new file mode 100644
index 0000000..bc9bfb3
--- /dev/null
+++ b/lib/libc/string.c
@@ -0,0 +1,13 @@
+#include <tinyx/libc/string.h>
+
+int strcmp(const char *str1, const char *str2)
+{
+	while ((*str1) == (*str2)) {
+		if (!*str1++)
+			return 0;
+		str2++;
+	}
+	while ((*str1++) && (*str2++));
+
+	return (*str1) ? 1 : -1;
+}
-- 
1.5.3.5