From b7c15c31519dc44c1f691e0466badd556ffe9423 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 18:18:56 +0200 Subject: Adding upstream version 3.7.10. Signed-off-by: Daniel Baumann --- src/util/argv.c | 326 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 326 insertions(+) create mode 100644 src/util/argv.c (limited to 'src/util/argv.c') diff --git a/src/util/argv.c b/src/util/argv.c new file mode 100644 index 0000000..a364e24 --- /dev/null +++ b/src/util/argv.c @@ -0,0 +1,326 @@ +/*++ +/* NAME +/* argv 3 +/* SUMMARY +/* string array utilities +/* SYNOPSIS +/* #include +/* +/* 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() truncates 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 +#include /* 44BSD stdarg.h uses abort() */ +#include +#include + +/* 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; +} -- cgit v1.2.3