1 files changed, 99 insertions, 0 deletions
diff --git a/pigeonhole/src/lib-sieve/cmp-i-ascii-casemap.c b/pigeonhole/src/lib-sieve/cmp-i-ascii-casemap.c
new file mode 100644
index 0000000..4f0dab4
--- /dev/null
+++ b/pigeonhole/src/lib-sieve/cmp-i-ascii-casemap.c
@@ -0,0 +1,99 @@
+/* Copyright (c) 2002-2018 Pigeonhole authors, see the included COPYING file
+ */
+
+/* Comparator 'i;ascii-casemap':
+ *
+ */
+
+#include "lib.h"
+
+#include "sieve-common.h"
+#include "sieve-comparators.h"
+
+#include <string.h>
+#include <stdio.h>
+#include <ctype.h>
+
+/*
+ * Forward declarations
+ */
+
+static int cmp_i_ascii_casemap_compare
+	(const struct sieve_comparator *cmp,
+		const char *val1, size_t val1_size, const char *val2, size_t val2_size);
+static bool cmp_i_ascii_casemap_char_match
+	(const struct sieve_comparator *cmp, const char **val1, const char *val1_end,
+		const char **val2, const char *val2_end);
+
+/*
+ * Comparator object
+ */
+
+const struct sieve_comparator_def i_ascii_casemap_comparator = {
+	SIEVE_OBJECT("i;ascii-casemap",
+		&comparator_operand, SIEVE_COMPARATOR_I_ASCII_CASEMAP),
+	.flags =
+		SIEVE_COMPARATOR_FLAG_ORDERING |
+		SIEVE_COMPARATOR_FLAG_EQUALITY |
+		SIEVE_COMPARATOR_FLAG_SUBSTRING_MATCH |
+		SIEVE_COMPARATOR_FLAG_PREFIX_MATCH,
+	.compare = cmp_i_ascii_casemap_compare,
+	.char_match = cmp_i_ascii_casemap_char_match,
+	.char_skip = sieve_comparator_octet_skip
+};
+
+/*
+ * Comparator implementation
+ */
+
+static int cmp_i_ascii_casemap_compare(
+	const struct sieve_comparator *cmp ATTR_UNUSED,
+	const char *val1, size_t val1_size, const char *val2, size_t val2_size)
+{
+	int result;
+
+	if ( val1_size == val2_size ) {
+		return strncasecmp(val1, val2, val1_size);
+	}
+
+	if ( val1_size > val2_size ) {
+		result = strncasecmp(val1, val2, val2_size);
+
+		if ( result == 0 ) return 1;
+
+		return result;
+	}
+
+	result = strncasecmp(val1, val2, val1_size);
+
+	if ( result == 0 ) return -1;
+
+	return result;
+}
+
+static bool cmp_i_ascii_casemap_char_match
+	(const struct sieve_comparator *cmp ATTR_UNUSED,
+		const char **val, const char *val_end,
+		const char **key, const char *key_end)
+{
+	const char *val_begin = *val;
+	const char *key_begin = *key;
+
+	while ( i_tolower(**val) == i_tolower(**key) &&
+		*val < val_end && *key < key_end ) {
+		(*val)++;
+		(*key)++;
+	}
+
+	if ( *key < key_end ) {
+		/* Reset */
+		*val = val_begin;
+		*key = key_begin;
+
+		return FALSE;
+	}
+
+	return TRUE;
+}
+
+