string slice

3 files changed, 51 insertions, 0 deletions

diff --git a/main.c b/main.c
new file mode 100644
index 0000000..a881c87
--- /dev/null
+++ b/main.c
@@ -0,0 +1,11 @@
+#include "slice.h"
+
+int
+main(void)
+{
+	Slice slice = slice_from_str("bonsoir paris");
+	slice_print(slice);
+	slice_print(slice_sub(slice, 3, 4));
+	slice_print(slice_sub(slice, 3, 7));
+	return 0;
+}
diff --git a/slice.c b/slice.c
new file mode 100644
index 0000000..172da58
--- /dev/null
+++ b/slice.c
@@ -0,0 +1,29 @@
+#include "slice.h"
+#include <string.h>
+#include <stdio.h>
+
+Slice
+slice_print(Slice slice)
+{
+	putchar('"');
+	for (int i = slice.begin; i < slice.end; i++) {
+		putchar(slice.str[i]);
+	}
+	putchar('"');
+	putchar('\n');
+	return slice;
+}
+
+Slice
+slice_from_str(const char *str)
+{
+	if (str == NULL)
+		return (Slice){ NULL, 0, 0 };
+	return (Slice){ str, 0, strlen(str) };
+}
+
+Slice
+slice_sub(Slice src, int begin, int end)
+{
+	return (Slice){ src.str, src.begin + begin, src.begin + end };
+}
diff --git a/slice.h b/slice.h
new file mode 100644
index 0000000..b15bb54
--- /dev/null
+++ b/slice.h
@@ -0,0 +1,11 @@
+#pragma once
+
+typedef struct {
+	const char *str;
+	int begin;
+	int end;
+} Slice;
+
+Slice slice_print(Slice slice);
+Slice slice_from_str(const char *str);
+Slice slice_sub(Slice src, int begin, int end);