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-rw-r--r--src/util/translit.c86
1 files changed, 86 insertions, 0 deletions
diff --git a/src/util/translit.c b/src/util/translit.c
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+/*++
+/* NAME
+/* translit 3
+/* SUMMARY
+/* transliterate characters
+/* SYNOPSIS
+/* #include <stringops.h>
+/*
+/* char *translit(buf, original, replacement)
+/* char *buf;
+/* char *original;
+/* char *replacement;
+/* DESCRIPTION
+/* translit() takes a null-terminated string, and replaces characters
+/* given in its \fIoriginal\fR argument by the corresponding characters
+/* in the \fIreplacement\fR string. The result value is the \fIbuf\fR
+/* argument.
+/* BUGS
+/* Cannot replace null characters.
+/* LICENSE
+/* .ad
+/* .fi
+/* The Secure Mailer license must be distributed with this software.
+/* AUTHOR(S)
+/* Wietse Venema
+/* IBM T.J. Watson Research
+/* P.O. Box 704
+/* Yorktown Heights, NY 10598, USA
+/*--*/
+
+/* System library. */
+
+#include "sys_defs.h"
+#include <string.h>
+
+/* Utility library. */
+
+#include "stringops.h"
+
+char *translit(char *string, const char *original, const char *replacement)
+{
+ char *cp;
+ const char *op;
+
+ /*
+ * For large inputs, should use a lookup table.
+ */
+ for (cp = string; *cp != 0; cp++) {
+ for (op = original; *op != 0; op++) {
+ if (*cp == *op) {
+ *cp = replacement[op - original];
+ break;
+ }
+ }
+ }
+ return (string);
+}
+
+#ifdef TEST
+
+ /*
+ * Usage: translit string1 string2
+ *
+ * test program to perform the most basic operation of the UNIX tr command.
+ */
+#include <msg.h>
+#include <vstring.h>
+#include <vstream.h>
+#include <vstring_vstream.h>
+
+#define STR vstring_str
+
+int main(int argc, char **argv)
+{
+ VSTRING *buf = vstring_alloc(100);
+
+ if (argc != 3)
+ msg_fatal("usage: %s string1 string2", argv[0]);
+ while (vstring_fgets(buf, VSTREAM_IN))
+ vstream_fputs(translit(STR(buf), argv[1], argv[2]), VSTREAM_OUT);
+ vstream_fflush(VSTREAM_OUT);
+ vstring_free(buf);
+ return (0);
+}
+
+#endif