From 7d4bc36949cec8e5c791c352a264cd1dea4f8a1e Mon Sep 17 00:00:00 2001
From: Bruce Hill <bruce@bruce-hill.com>
Date: Sun, 27 Dec 2020 19:48:52 -0800
Subject: Added in-place filtering/replacements

---
 file_loader.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

(limited to 'file_loader.c')

diff --git a/file_loader.c b/file_loader.c
index 72cea72..1f61953 100644
--- a/file_loader.c
+++ b/file_loader.c
@@ -89,6 +89,24 @@ file_t *spoof_file(const char *filename, char *text)
     return f;
 }
 
+/*
+ * Ensure that the file's contents are held in memory, rather than being memory
+ * mapped IO.
+ */
+void intern_file(file_t *f)
+{
+    if (!f->mmapped) return;
+    size_t size = (size_t)(f->end - f->contents);
+    char *buf = xcalloc(sizeof(char), size + 1);
+    memcpy(buf, f->contents, size);
+    munmap(f->contents, size);
+    f->contents = buf;
+    f->end = buf + size;
+    f->mmapped = 0;
+    free(f->lines);
+    populate_lines(f);
+}
+
 void destroy_file(file_t **f)
 {
     if ((*f)->filename) {
-- 
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