X-Git-Url: http://pileus.org/git/?a=blobdiff_plain;ds=sidebyside;f=lib.c;fp=lib.c;h=7b46a0593cca853d568b934d2335b7dc526a8088;hb=4fae25ec557ca4fd79edc553f75a688d1fc80e20;hp=0000000000000000000000000000000000000000;hpb=ea1ec85fd94e887ad47403458f416d01b2af2213;p=~andy%2Fct

diff --git a/lib.c b/lib.c
new file mode 100644
index 0000000..7b46a05
--- /dev/null
+++ b/lib.c
@@ -0,0 +1,43 @@
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <stdlib.h>
+#include <printf.h>
+
+static int printf_markup(FILE *stream,
+		const struct printf_info *info,
+		const void *const *args)
+{
+	int len = 0;
+	const char *str = *(const char **)args[0];
+	for (int i = 0; str[i]; i++)
+		switch (str[i]) {
+		case '"':  len += fputs("&#39;",  stream); break;
+		case '\'': len += fputs("&quot;", stream); break;
+		case '&':  len += fputs("&amp;",  stream); break;
+		case '<':  len += fputs("&lt;",   stream); break;
+		case '>':  len += fputs("&gt;",   stream); break;
+		default:   len += fputc(str[i],   stream); break;
+		}
+	return len;
+}
+
+static int printf_markup_arginfo(const struct printf_info *info,
+		size_t n, int *argtypes, int *size)
+{
+	argtypes[0] = PA_STRING;
+	return 1;
+}
+
+void ct_use_escape()
+{
+	register_printf_specifier('M', printf_markup, printf_markup_arginfo);
+}
+
+int main(void)
+{
+	ct_use_escape();
+	printf("%M\n", "<Hello, World>");
+	printf("%M\n", "<Hello, World>");
+	printf("%M\n", "<Hello, World>");
+	return 0;
+}