From f9325111c05ef0760e5a1ebd5224a7f3724fbefe Mon Sep 17 00:00:00 2001
From: Kate F <kate@elide.org>
Date: Fri, 2 Jun 2023 14:54:28 -0700
Subject: [PATCH] Emit strncmp() for `FSM_IO_STR`, similar to memcmp().

---
 src/libfsm/print/vmc.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/src/libfsm/print/vmc.c b/src/libfsm/print/vmc.c
index 783eb5dfd..b92d68f6d 100644
--- a/src/libfsm/print/vmc.c
+++ b/src/libfsm/print/vmc.c
@@ -391,6 +391,19 @@ fsm_print_cfrag(FILE *f, const struct ir *ir, const struct fsm_options *opt,
 				fprintf(f, "\t");
 				fprintf(f, "p += %zu;\n", n);
 
+				op = tail;
+			} else if (n > 1 && opt->io == FSM_IO_STR) {
+				fprintf(f, "if (0 != strncmp(p, \"");
+				escputbuf(f, opt, c_escputc_str, buf, n);
+				fprintf(f, "\", %zu)) ", n);
+				if (-1 == print_end(f, NULL, opt, end_bits, ir)) {
+					return -1;
+				}
+				fprintf(f, "\n");
+
+				fprintf(f, "\t");
+				fprintf(f, "p += %zu;\n", n);
+
 				op = tail;
 			} else {
 				print_fetch(f, opt);