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/*
* $Id: argv.c,v 1.13 2020/03/26 02:55:37 tom Exp $
*
* argv - Reusable functions for argv-parsing.
*
* Copyright 2011-2018,2020 Thomas E. Dickey
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License, version 2.1
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, write to
* Free Software Foundation, Inc.
* 51 Franklin St., Fifth Floor
* Boston, MA 02110, USA.
*/
#include <dialog.h>
#include <string.h>
/*
* Convert a string to an argv[], returning a char** index (which must be
* freed by the caller). The string is modified (replacing gaps between
* tokens with nulls).
*/
char **
dlg_string_to_argv(char *blob)
{
size_t n, k;
int pass;
size_t length = strlen(blob);
char **result = 0;
#ifdef HAVE_DLG_TRACE
if (dialog_state.trace_output) {
DLG_TRACE(("# dlg_string_to_argv:\n"));
DLG_TRACE(("# given:\n"));
for (n = k = 0; n < length; ++n) {
if (blob[n] == '\n') {
DLG_TRACE(("#%s\t%.*s\\n\n",
k ? "+" : "",
(int) (n - k), blob + k));
k = n + 1;
}
}
if (n > k) {
DLG_TRACE(("#%s\t%.*s\n",
k ? "+" : "",
(int) (n - k), blob + k));
}
DLG_TRACE(("# result:\n"));
}
#endif
for (pass = 0; pass < 2; ++pass) {
bool inparm = FALSE;
bool quoted = FALSE;
char *param = blob;
size_t count = 0;
for (n = 0; n < length; ++n) {
if (quoted && blob[n] == '"') {
quoted = FALSE;
} else if (blob[n] == '"') {
quoted = TRUE;
if (!inparm) {
if (pass) {
result[count] = param;
}
++count;
inparm = TRUE;
}
} else if (!quoted && isspace(UCH(blob[n]))) {
if (inparm) {
if (pass) {
*param = '\0';
}
++param;
inparm = FALSE;
}
} else {
if (blob[n] == '\\') {
size_t n1 = (n + 1);
bool ignore = FALSE;
if (n1 == length) {
break; /* The string is terminated by a backslash */
} else if ((blob[n1] == '\\') ||
(blob[n1] == '"') ||
(ignore = (blob[n1] == '\n'))) {
/* eat the backslash */
if (pass) {
--length;
for (k = n; k < length; ++k)
blob[k] = blob[k + 1];
blob[length] = '\0';
} else {
++param; /* pretend I ate it */
}
if (ignore)
continue;
}
}
if (!inparm) {
if (pass) {
result[count] = param;
}
++count;
inparm = TRUE;
}
if (pass) {
*param = blob[n];
}
++param;
}
}
if (pass) {
*param = '\0';
} else {
if (count) {
result = dlg_calloc(char *, count + 1);
assert_ptr(result, "string_to_argv");
} else {
break; /* no tokens found */
}
}
}
#ifdef HAVE_DLG_TRACE
if (result != 0) {
for (n = 0; result[n] != 0; ++n) {
DLG_TRACE(("#\targv[%d] = %s\n", (int) n, result[n]));
}
}
#endif
return result;
}
/*
* Count the entries in an argv list.
*/
int
dlg_count_argv(char **argv)
{
int result = 0;
if (argv != 0) {
while (argv[result] != 0)
++result;
}
return result;
}
int
dlg_eat_argv(int *argcp, char ***argvp, int start, int count)
{
int k;
*argcp -= count;
for (k = start; k <= *argcp; k++)
(*argvp)[k] = (*argvp)[k + count];
(*argvp)[*argcp] = 0;
return TRUE;
}
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