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-rw-r--r--src/util/argv.c326
1 files changed, 326 insertions, 0 deletions
diff --git a/src/util/argv.c b/src/util/argv.c
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+++ b/src/util/argv.c
@@ -0,0 +1,326 @@
+/*++
+/* NAME
+/* argv 3
+/* SUMMARY
+/* string array utilities
+/* SYNOPSIS
+/* #include <argv.h>
+/*
+/* ARGV *argv_alloc(len)
+/* ssize_t len;
+/*
+/* ARGV *argv_sort(argvp)
+/* ARGV *argvp;
+/*
+/* ARGV *argv_free(argvp)
+/* ARGV *argvp;
+/*
+/* void argv_add(argvp, arg, ..., ARGV_END)
+/* ARGV *argvp;
+/* char *arg;
+/*
+/* void argv_addn(argvp, arg, arg_len, ..., ARGV_END)
+/* ARGV *argvp;
+/* char *arg;
+/* ssize_t arg_len;
+/*
+/* void argv_terminate(argvp);
+/* ARGV *argvp;
+/*
+/* void argv_truncate(argvp, len);
+/* ARGV *argvp;
+/* ssize_t len;
+/*
+/* void argv_insert_one(argvp, pos, arg)
+/* ARGV *argvp;
+/* ssize_t pos;
+/* const char *arg;
+/*
+/* void argv_replace_one(argvp, pos, arg)
+/* ARGV *argvp;
+/* ssize_t pos;
+/* const char *arg;
+/*
+/* void argv_delete(argvp, pos, how_many)
+/* ARGV *argvp;
+/* ssize_t pos;
+/* ssize_t how_many;
+/*
+/* void ARGV_FAKE_BEGIN(argv, arg)
+/* const char *arg;
+/*
+/* void ARGV_FAKE_END
+/* DESCRIPTION
+/* The functions in this module manipulate arrays of string
+/* pointers. An ARGV structure contains the following members:
+/* .IP len
+/* The length of the \fIargv\fR array member.
+/* .IP argc
+/* The number of \fIargv\fR elements used.
+/* .IP argv
+/* An array of pointers to null-terminated strings.
+/* .PP
+/* argv_alloc() returns an empty string array of the requested
+/* length. The result is ready for use by argv_add(). The array
+/* is null terminated.
+/*
+/* argv_sort() sorts the elements of argvp in place returning
+/* the original array.
+/*
+/* argv_add() copies zero or more strings and adds them to the
+/* specified string array. The array is null terminated.
+/* Terminate the argument list with a null pointer. The manifest
+/* constant ARGV_END provides a convenient notation for this.
+/*
+/* argv_addn() is like argv_add(), but each string is followed
+/* by a string length argument.
+/*
+/* argv_free() releases storage for a string array, and conveniently
+/* returns a null pointer.
+/*
+/* argv_terminate() null-terminates its string array argument.
+/*
+/* argv_truncate() trucates its argument to the specified
+/* number of entries, but does not reallocate memory. The
+/* result is null-terminated.
+/*
+/* argv_insert_one() inserts one string at the specified array
+/* position.
+/*
+/* argv_replace_one() replaces one string at the specified
+/* position. The old string is destroyed after the update is
+/* made.
+/*
+/* argv_delete() deletes the specified number of elements
+/* starting at the specified array position. The result is
+/* null-terminated.
+/*
+/* ARGV_FAKE_BEGIN/END are an optimization for the case where
+/* a single string needs to be passed into an ARGV-based
+/* interface. ARGV_FAKE_BEGIN() opens a statement block and
+/* allocates a stack-based ARGV structure named after the first
+/* argument, that encapsulates the second argument. This
+/* implementation allocates no heap memory and creates no copy
+/* of the second argument. ARGV_FAKE_END closes the statement
+/* block and thereby releases storage.
+/* SEE ALSO
+/* msg(3) diagnostics interface
+/* DIAGNOSTICS
+/* Fatal errors: memory allocation problem.
+/* 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 libraries. */
+
+#include <sys_defs.h>
+#include <stdlib.h> /* 44BSD stdarg.h uses abort() */
+#include <stdarg.h>
+#include <string.h>
+
+/* Application-specific. */
+
+#include "mymalloc.h"
+#include "msg.h"
+#include "argv.h"
+
+/* argv_free - destroy string array */
+
+ARGV *argv_free(ARGV *argvp)
+{
+ char **cpp;
+
+ for (cpp = argvp->argv; cpp < argvp->argv + argvp->argc; cpp++)
+ myfree(*cpp);
+ myfree((void *) argvp->argv);
+ myfree((void *) argvp);
+ return (0);
+}
+
+/* argv_alloc - initialize string array */
+
+ARGV *argv_alloc(ssize_t len)
+{
+ ARGV *argvp;
+ ssize_t sane_len;
+
+ /*
+ * Make sure that always argvp->argc < argvp->len.
+ */
+ argvp = (ARGV *) mymalloc(sizeof(*argvp));
+ argvp->len = 0;
+ sane_len = (len < 2 ? 2 : len);
+ argvp->argv = (char **) mymalloc((sane_len + 1) * sizeof(char *));
+ argvp->len = sane_len;
+ argvp->argc = 0;
+ argvp->argv[0] = 0;
+ return (argvp);
+}
+
+static int argv_cmp(const void *e1, const void *e2)
+{
+ const char *s1 = *(const char **) e1;
+ const char *s2 = *(const char **) e2;
+
+ return strcmp(s1, s2);
+}
+
+/* argv_sort - sort array in place */
+
+ARGV *argv_sort(ARGV *argvp)
+{
+ qsort(argvp->argv, argvp->argc, sizeof(argvp->argv[0]), argv_cmp);
+ return (argvp);
+}
+
+/* argv_extend - extend array */
+
+static void argv_extend(ARGV *argvp)
+{
+ ssize_t new_len;
+
+ new_len = argvp->len * 2;
+ argvp->argv = (char **)
+ myrealloc((void *) argvp->argv, (new_len + 1) * sizeof(char *));
+ argvp->len = new_len;
+}
+
+/* argv_add - add string to vector */
+
+void argv_add(ARGV *argvp,...)
+{
+ char *arg;
+ va_list ap;
+
+ /*
+ * Make sure that always argvp->argc < argvp->len.
+ */
+#define ARGV_SPACE_LEFT(a) ((a)->len - (a)->argc - 1)
+
+ va_start(ap, argvp);
+ while ((arg = va_arg(ap, char *)) != 0) {
+ if (ARGV_SPACE_LEFT(argvp) <= 0)
+ argv_extend(argvp);
+ argvp->argv[argvp->argc++] = mystrdup(arg);
+ }
+ va_end(ap);
+ argvp->argv[argvp->argc] = 0;
+}
+
+/* argv_addn - add string to vector */
+
+void argv_addn(ARGV *argvp,...)
+{
+ char *arg;
+ ssize_t len;
+ va_list ap;
+
+ /*
+ * Make sure that always argvp->argc < argvp->len.
+ */
+ va_start(ap, argvp);
+ while ((arg = va_arg(ap, char *)) != 0) {
+ if ((len = va_arg(ap, ssize_t)) < 0)
+ msg_panic("argv_addn: bad string length %ld", (long) len);
+ if (ARGV_SPACE_LEFT(argvp) <= 0)
+ argv_extend(argvp);
+ argvp->argv[argvp->argc++] = mystrndup(arg, len);
+ }
+ va_end(ap);
+ argvp->argv[argvp->argc] = 0;
+}
+
+/* argv_terminate - terminate string array */
+
+void argv_terminate(ARGV *argvp)
+{
+
+ /*
+ * Trust that argvp->argc < argvp->len.
+ */
+ argvp->argv[argvp->argc] = 0;
+}
+
+/* argv_truncate - truncate string array */
+
+void argv_truncate(ARGV *argvp, ssize_t len)
+{
+ char **cpp;
+
+ /*
+ * Sanity check.
+ */
+ if (len < 0)
+ msg_panic("argv_truncate: bad length %ld", (long) len);
+
+ if (len < argvp->argc) {
+ for (cpp = argvp->argv + len; cpp < argvp->argv + argvp->argc; cpp++)
+ myfree(*cpp);
+ argvp->argc = len;
+ argvp->argv[argvp->argc] = 0;
+ }
+}
+
+/* argv_insert_one - insert one string into array */
+
+void argv_insert_one(ARGV *argvp, ssize_t where, const char *arg)
+{
+ ssize_t pos;
+
+ /*
+ * Sanity check.
+ */
+ if (where < 0 || where > argvp->argc)
+ msg_panic("argv_insert_one bad position: %ld", (long) where);
+
+ if (ARGV_SPACE_LEFT(argvp) <= 0)
+ argv_extend(argvp);
+ for (pos = argvp->argc; pos >= where; pos--)
+ argvp->argv[pos + 1] = argvp->argv[pos];
+ argvp->argv[where] = mystrdup(arg);
+ argvp->argc += 1;
+}
+
+/* argv_replace_one - replace one string in array */
+
+void argv_replace_one(ARGV *argvp, ssize_t where, const char *arg)
+{
+ char *temp;
+
+ /*
+ * Sanity check.
+ */
+ if (where < 0 || where >= argvp->argc)
+ msg_panic("argv_replace_one bad position: %ld", (long) where);
+
+ temp = argvp->argv[where];
+ argvp->argv[where] = mystrdup(arg);
+ myfree(temp);
+}
+
+/* argv_delete - remove string(s) from array */
+
+void argv_delete(ARGV *argvp, ssize_t first, ssize_t how_many)
+{
+ ssize_t pos;
+
+ /*
+ * Sanity check.
+ */
+ if (first < 0 || how_many < 0 || first + how_many > argvp->argc)
+ msg_panic("argv_delete bad range: (start=%ld count=%ld)",
+ (long) first, (long) how_many);
+
+ for (pos = first; pos < first + how_many; pos++)
+ myfree(argvp->argv[pos]);
+ for (pos = first; pos <= argvp->argc - how_many; pos++)
+ argvp->argv[pos] = argvp->argv[pos + how_many];
+ argvp->argc -= how_many;
+}
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