Move cord helper functions into their own file

1 files changed, 70 insertions, 0 deletions

diff --git a/cordhelpers.c b/cordhelpers.c
new file mode 100644
index 00000000..f0e1ab38
--- /dev/null
+++ b/cordhelpers.c
@@ -0,0 +1,70 @@
+// Some helper functions for the GC Cord library
+
+#include <gc/cord.h>
+#include <stdarg.h>
+
+#include "builtins/util.h"
+
+__attribute__((format(printf, 1, 2)))
+public CORD CORD_asprintf(CORD fmt, ...)
+{
+    va_list args;
+    va_start(args, fmt);
+    CORD c = NULL;
+    CORD_vsprintf(&c, fmt, args);
+    va_end(args);
+    return c;
+}
+
+public CORD CORD_quoted(CORD str)
+{
+    CORD quoted = "\"";
+    CORD_pos i;
+#pragma GCC diagnostic ignored "-Wsign-conversion"
+    CORD_FOR(i, str) {
+        char c = CORD_pos_fetch(i);
+        switch (c) {
+        case '\a': quoted = CORD_cat(quoted, "\\a"); break;
+        case '\b': quoted = CORD_cat(quoted, "\\b"); break;
+        case '\x1b': quoted = CORD_cat(quoted, "\\e"); break;
+        case '\f': quoted = CORD_cat(quoted, "\\f"); break;
+        case '\n': quoted = CORD_cat(quoted, "\\n"); break;
+        case '\r': quoted = CORD_cat(quoted, "\\r"); break;
+        case '\t': quoted = CORD_cat(quoted, "\\t"); break;
+        case '\v': quoted = CORD_cat(quoted, "\\v"); break;
+        case '"': quoted = CORD_cat(quoted, "\\\""); break;
+        case '\\': quoted = CORD_cat(quoted, "\\\\"); break;
+#pragma GCC diagnostic ignored "-Wpedantic"
+        case '\x00' ... '\x06': case '\x0E' ... '\x1A':
+        case '\x1C' ... '\x1F': case '\x7F' ... '\x7F':
+            CORD_sprintf(&quoted, "%r\\x%02X", quoted, c);
+            break;
+        default: quoted = CORD_cat_char(quoted, c); break;
+        }
+    }
+    quoted = CORD_cat_char(quoted, '"');
+    return quoted;
+}
+
+public CORD CORD_replace(CORD c, CORD to_replace, CORD replacement)
+{
+    size_t len = CORD_len(c);
+    size_t replaced_len = CORD_len(to_replace);
+    size_t pos = 0;
+    CORD ret = CORD_EMPTY;
+    while (pos < len) {
+        size_t found = CORD_str(c, pos, to_replace);
+        if (found == CORD_NOT_FOUND) {
+            if (pos < len)
+                ret = CORD_cat(ret, CORD_substr(c, pos, len));
+            return ret;
+        }
+        if (found > pos)
+            ret = CORD_cat(ret, CORD_substr(c, pos, found-pos));
+        ret = CORD_cat(ret, replacement);
+        pos = found + replaced_len;
+    }
+    return ret;
+}
+
+// vim: ts=4 sw=0 et cino=L2,l1,(0,W4,m1,\:0