+/*
+ * The newline_escape_filename function performs newline escaping for any
+ * filename that contains a newline. This function also takes a pointer
+ * to backslash. The backslash pointer is a flag to indicating whether a newline
+ * is present in the filename. If a newline is present, the backslash flag is
+ * set and the output format will contain a backslash at the beginning of the
+ * digest output. This output format is to replicate the output format found
+ * in the '*sum' checksum programs. This aims to preserve backward
+ * compatibility.
+ */
+static const char *newline_escape_filename(const char *file, int * backslash)
+{
+ size_t i, e = 0, length = strlen(file), newline_count = 0, mem_len = 0;
+ char *file_cpy = NULL;
+
+ for (i = 0; i < length; i++)
+ if (file[i] == '\n')
+ newline_count++;
+
+ mem_len = length + newline_count + 1;
+ file_cpy = app_malloc(mem_len, file);
+ i = 0;
+
+ while(e < length) {
+ const char c = file[e];
+ if (c == '\n') {
+ file_cpy[i++] = '\\';
+ file_cpy[i++] = 'n';
+ *backslash = 1;
+ } else {
+ file_cpy[i++] = c;
+ }
+ e++;
+ }
+ file_cpy[i] = '\0';
+ return (const char*)file_cpy;
+}
+
+