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-rw-r--r--src/util/vstring.h125
1 files changed, 125 insertions, 0 deletions
diff --git a/src/util/vstring.h b/src/util/vstring.h
new file mode 100644
index 0000000..49fd960
--- /dev/null
+++ b/src/util/vstring.h
@@ -0,0 +1,125 @@
+#ifndef _VSTRING_H_INCLUDED_
+#define _VSTRING_H_INCLUDED_
+
+/*++
+/* NAME
+/* vstring 3h
+/* SUMMARY
+/* arbitrary-length string manager
+/* SYNOPSIS
+/* #include "vstring.h"
+/* DESCRIPTION
+/* .nf
+
+ /*
+ * System library.
+ */
+#include <stdarg.h>
+
+ /*
+ * Utility library.
+ */
+#include <vbuf.h>
+#include <check_arg.h>
+
+ /*
+ * We can't allow bare VBUFs in the interface, because VSTRINGs have a
+ * specific initialization and destruction sequence.
+ */
+typedef struct VSTRING {
+ VBUF vbuf;
+} VSTRING;
+
+extern VSTRING *vstring_alloc(ssize_t);
+extern void vstring_ctl(VSTRING *,...);
+extern VSTRING *vstring_truncate(VSTRING *, ssize_t);
+extern VSTRING *vstring_set_payload_size(VSTRING *, ssize_t);
+extern VSTRING *vstring_free(VSTRING *);
+extern VSTRING *vstring_strcpy(VSTRING *, const char *);
+extern VSTRING *vstring_strncpy(VSTRING *, const char *, ssize_t);
+extern VSTRING *vstring_strcat(VSTRING *, const char *);
+extern VSTRING *vstring_strncat(VSTRING *, const char *, ssize_t);
+extern VSTRING *vstring_memcpy(VSTRING *, const char *, ssize_t);
+extern VSTRING *vstring_memcat(VSTRING *, const char *, ssize_t);
+extern char *vstring_memchr(VSTRING *, int);
+extern VSTRING *vstring_insert(VSTRING *, ssize_t, const char *, ssize_t);
+extern VSTRING *vstring_prepend(VSTRING *, const char *, ssize_t);
+extern VSTRING *PRINTFLIKE(2, 3) vstring_sprintf(VSTRING *, const char *,...);
+extern VSTRING *PRINTFLIKE(2, 3) vstring_sprintf_append(VSTRING *, const char *,...);
+extern VSTRING *PRINTFLIKE(2, 3) vstring_sprintf_prepend(VSTRING *, const char *,...);
+extern char *vstring_export(VSTRING *);
+extern VSTRING *vstring_import(char *);
+
+/* Legacy API: constant plus type-unchecked argument. */
+#define VSTRING_CTL_EXACT 2
+#define VSTRING_CTL_END 0
+
+/* Safer API: type-checked arguments. */
+#define CA_VSTRING_CTL_END VSTRING_CTL_END
+#define CA_VSTRING_CTL_EXACT VSTRING_CTL_EXACT
+
+CHECK_VAL_HELPER_DCL(VSTRING_CTL, ssize_t);
+
+/* Flags 24..31 are reserved for VSTRING. */
+#define VSTRING_FLAG_EXACT (1<<24) /* exact allocation for tests */
+#define VSTRING_FLAG_MASK (255 << 24)
+
+ /*
+ * Macros. Unsafe macros have UPPERCASE names.
+ */
+#define VSTRING_SPACE(vp, len) ((vp)->vbuf.space(&(vp)->vbuf, (len)))
+#define vstring_str(vp) ((char *) (vp)->vbuf.data)
+#define VSTRING_LEN(vp) ((ssize_t) ((vp)->vbuf.ptr - (vp)->vbuf.data))
+#define vstring_end(vp) ((char *) (vp)->vbuf.ptr)
+#define VSTRING_TERMINATE(vp) do { \
+ *(vp)->vbuf.ptr = 0; \
+ } while (0)
+#define VSTRING_RESET(vp) do { \
+ (vp)->vbuf.ptr = (vp)->vbuf.data; \
+ (vp)->vbuf.cnt = (vp)->vbuf.len; \
+ } while (0)
+#define VSTRING_ADDCH(vp, ch) VBUF_PUT(&(vp)->vbuf, ch)
+#define VSTRING_SKIP(vp) do { \
+ while ((vp)->vbuf.cnt > 0 && *(vp)->vbuf.ptr) \
+ (vp)->vbuf.ptr++, (vp)->vbuf.cnt--; \
+ } while (0)
+#define vstring_avail(vp) ((vp)->vbuf.cnt)
+
+ /*
+ * The following macro is not part of the public interface, because it can
+ * really screw up a buffer by positioning past allocated memory.
+ */
+#ifdef VSTRING_INTERNAL
+#define VSTRING_AT_OFFSET(vp, offset) do { \
+ (vp)->vbuf.ptr = (vp)->vbuf.data + (offset); \
+ (vp)->vbuf.cnt = (vp)->vbuf.len - (offset); \
+ } while (0)
+#endif
+
+extern VSTRING *vstring_vsprintf(VSTRING *, const char *, va_list);
+extern VSTRING *vstring_vsprintf_append(VSTRING *, const char *, va_list);
+
+/* BUGS
+/* Auto-resizing may change the address of the string data in
+/* a vstring structure. Beware of dangling pointers.
+/* HISTORY
+/* .ad
+/* .fi
+/* A vstring module appears in the UNPROTO software by Wietse Venema.
+/* 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
+/*
+/* Wietse Venema
+/* Google, Inc.
+/* 111 8th Avenue
+/* New York, NY 10011, USA
+/*--*/
+
+#endif