166 lines
3.5 KiB
C
166 lines
3.5 KiB
C
/*
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* $Id: argv.c,v 1.12 2018/06/12 22:47:23 tom Exp $
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*
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* argv - Reusable functions for argv-parsing.
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*
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* Copyright 2011-2017,2018 Thomas E. Dickey
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License, version 2.1
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this program; if not, write to
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* Free Software Foundation, Inc.
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* 51 Franklin St., Fifth Floor
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* Boston, MA 02110, USA.
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*/
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#include <dialog.h>
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#include <string.h>
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/*
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* Convert a string to an argv[], returning a char** index (which must be
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* freed by the caller). The string is modified (replacing gaps between
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* tokens with nulls).
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*/
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char **
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dlg_string_to_argv(char *blob)
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{
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size_t n, k;
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int pass;
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size_t length = strlen(blob);
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char **result = 0;
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#ifdef HAVE_DLG_TRACE
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if (dialog_state.trace_output) {
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DLG_TRACE(("# dlg_string_to_argv:\n"));
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DLG_TRACE(("# given:\n"));
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for (n = k = 0; n < length; ++n) {
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if (blob[n] == '\n') {
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DLG_TRACE(("#%s\t%.*s\\n\n",
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k ? "+" : "",
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(int) (n - k), blob + k));
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k = n + 1;
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}
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}
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if (n > k) {
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DLG_TRACE(("#%s\t%.*s\n",
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k ? "+" : "",
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(int) (n - k), blob + k));
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}
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DLG_TRACE(("# result:\n"));
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}
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#endif
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for (pass = 0; pass < 2; ++pass) {
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bool inparm = FALSE;
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bool quoted = FALSE;
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bool escape = FALSE;
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char *param = blob;
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size_t count = 0;
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for (n = 0; n < length; ++n) {
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if (escape) {
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;
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} else if (quoted && blob[n] == '"') {
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quoted = FALSE;
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} else if (blob[n] == '"') {
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quoted = TRUE;
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if (!inparm) {
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if (pass)
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result[count] = param;
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++count;
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inparm = TRUE;
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}
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} else if (!quoted && isspace(UCH(blob[n]))) {
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if (inparm) {
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if (pass) {
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*param++ = '\0';
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}
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inparm = FALSE;
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}
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} else {
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if (blob[n] == '\\') {
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if (n + 1 == length) {
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break; /* The string is terminated by a backslash */
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} else if ((blob[n + 1] == '\\') ||
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(blob[n + 1] == '"') ||
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(!quoted && blob[n + 1] == '\n')) {
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/* eat the backslash */
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if (pass) {
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--length;
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for (k = n; k < length; ++k)
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blob[k] = blob[k + 1];
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blob[length] = '\0';
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} else {
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escape = TRUE;
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continue;
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}
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}
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}
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if (!inparm) {
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if (pass)
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result[count] = param;
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++count;
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inparm = TRUE;
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}
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if (pass) {
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*param++ = blob[n];
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}
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}
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escape = FALSE;
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}
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if (!pass) {
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if (count) {
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result = dlg_calloc(char *, count + 1);
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assert_ptr(result, "string_to_argv");
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} else {
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break; /* no tokens found */
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}
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} else {
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*param = '\0';
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}
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}
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#ifdef HAVE_DLG_TRACE
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if (result != 0) {
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for (n = 0; result[n] != 0; ++n) {
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DLG_TRACE(("#\targv[%d] = %s\n", (int) n, result[n]));
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}
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}
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#endif
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return result;
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}
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/*
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* Count the entries in an argv list.
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*/
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int
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dlg_count_argv(char **argv)
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{
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int result = 0;
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if (argv != 0) {
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while (argv[result] != 0)
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++result;
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}
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return result;
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}
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int
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dlg_eat_argv(int *argcp, char ***argvp, int start, int count)
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{
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int k;
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*argcp -= count;
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for (k = start; k <= *argcp; k++)
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(*argvp)[k] = (*argvp)[k + count];
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(*argvp)[*argcp] = 0;
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return TRUE;
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}
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