From 63a314144a36691a57c2e82fe2f3da008c403aba Mon Sep 17 00:00:00 2001 From: Robin Haberkorn Date: Tue, 22 Jul 2025 01:31:37 +0300 Subject: refactored =/==/=== command into stdio-commands.c There will be a lot more commands for terminal/message input and output soon. --- src/stdio-commands.c | 197 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 197 insertions(+) create mode 100644 src/stdio-commands.c (limited to 'src/stdio-commands.c') diff --git a/src/stdio-commands.c b/src/stdio-commands.c new file mode 100644 index 0000000..263425c --- /dev/null +++ b/src/stdio-commands.c @@ -0,0 +1,197 @@ +/* + * Copyright (C) 2012-2025 Robin Haberkorn + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include + +#include "sciteco.h" +#include "parser.h" +#include "error.h" +#include "expressions.h" +#include "interface.h" +#include "cmdline.h" +#include "core-commands.h" +#include "stdio-commands.h" + +/** + * Print number from stack in the given radix. + * + * It must be popped manually, so we can call it multiple times + * on the same number. + */ +static gboolean +teco_print(guint radix, GError **error) +{ + if (!teco_expressions_eval(FALSE, error)) + return FALSE; + if (!teco_expressions_args()) { + teco_error_argexpected_set(error, "="); + return FALSE; + } + /* + * FIXME: There should be a raw output function, + * also to allow output without trailing LF. + * Perhaps repurpose teco_expressions_format(). + */ + const gchar *fmt = "%" TECO_INT_MODIFIER "d"; + switch (radix) { + case 8: fmt = "%" TECO_INT_MODIFIER "o"; break; + case 16: fmt = "%" TECO_INT_MODIFIER "X"; break; + } + teco_interface_msg(TECO_MSG_USER, fmt, teco_expressions_peek_num(0)); + return TRUE; +} + +/*$ "=" "==" "===" print + * = -- Print integer as message + * == + * === + * + * Shows integer as a message in the message line and/or + * on the console. + * One \(lq=\(rq formats the integer as a signed decimal number, + * \(lq==\(rq formats as an unsigned octal number and + * \(lq===\(rq as an unsigned hexadecimal number. + * It is logged with the user-message severity. + * The command fails if is not given. + * + * A noteworthy quirk is that \(lq==\(rq and \(lq===\(rq + * will print 2 or 3 numbers in succession when executed + * from interactive mode at the end of the command line + * in order to guarantee immediate feedback. + * + * If you want to print multiple values from the stack, + * you have to put the \(lq=\(rq into a pass-through loop + * or separate the commands with + * whitespace (e.g. \(lq^Y= =\(rq). + */ +/* + * In order to imitate TECO-11 closely, we apply the lookahead + * strategy -- `=` and `==` are not executed immediately but only + * when a non-`=` character is parsed (cf. `$$` and `^C^C`). + * However, this would be very annoying during interactive + * execution, therefore we still print the number immediately + * and perhaps multiple times: + * Typing `===` prints the number first in decimal, + * then octal and finally in hexadecimal. + * This won't happen e.g. in a loop that is closed on the command-line. + * + * FIXME: Support colon-modifier to suppress line-break on console. + */ +TECO_DECLARE_STATE(teco_state_print_octal); + +static gboolean +teco_state_print_decimal_initial(teco_machine_main_t *ctx, GError **error) +{ + if (ctx->flags.mode > TECO_MODE_NORMAL || !teco_cmdline_is_executing(ctx)) + return TRUE; + /* + * Interactive invocation: + * don't yet pop number as we may have to print it repeatedly + */ + return teco_print(10, error); +} + +static teco_state_t * +teco_state_print_decimal_input(teco_machine_main_t *ctx, gunichar chr, GError **error) +{ + if (chr == '=') + return &teco_state_print_octal; + + if (ctx->flags.mode == TECO_MODE_NORMAL) { + if (!teco_cmdline_is_executing(ctx) && !teco_print(10, error)) + return NULL; + teco_expressions_pop_num(0); + } + return teco_state_start_input(ctx, chr, error); +} + +/* + * Due to the deferred nature of `=`, + * it is valid to end in this state as well. + */ +static gboolean +teco_state_print_decimal_end_of_macro(teco_machine_main_t *ctx, GError **error) +{ + if (teco_cmdline_is_executing(ctx) || ctx->flags.mode > TECO_MODE_NORMAL) + return TRUE; + if (!teco_print(10, error)) + return FALSE; + teco_expressions_pop_num(0); + return TRUE; +} + +TECO_DEFINE_STATE_START(teco_state_print_decimal, + .initial_cb = (teco_state_initial_cb_t)teco_state_print_decimal_initial, + .end_of_macro_cb = (teco_state_end_of_macro_cb_t) + teco_state_print_decimal_end_of_macro +); + +static gboolean +teco_state_print_octal_initial(teco_machine_main_t *ctx, GError **error) +{ + if (ctx->flags.mode > TECO_MODE_NORMAL || !teco_cmdline_is_executing(ctx)) + return TRUE; + /* + * Interactive invocation: + * don't yet pop number as we may have to print it repeatedly + */ + return teco_print(8, error); +} + +static teco_state_t * +teco_state_print_octal_input(teco_machine_main_t *ctx, gunichar chr, GError **error) +{ + if (chr == '=') { + if (ctx->flags.mode == TECO_MODE_NORMAL) { + if (!teco_print(16, error)) + return NULL; + teco_expressions_pop_num(0); + } + return &teco_state_start; + } + + if (ctx->flags.mode == TECO_MODE_NORMAL) { + if (!teco_cmdline_is_executing(ctx) && !teco_print(8, error)) + return NULL; + teco_expressions_pop_num(0); + } + return teco_state_start_input(ctx, chr, error); +} + +/* + * Due to the deferred nature of `==`, + * it is valid to end in this state as well. + */ +static gboolean +teco_state_print_octal_end_of_macro(teco_machine_main_t *ctx, GError **error) +{ + if (teco_cmdline_is_executing(ctx) || ctx->flags.mode > TECO_MODE_NORMAL) + return TRUE; + if (!teco_print(8, error)) + return FALSE; + teco_expressions_pop_num(0); + return TRUE; +} + +TECO_DEFINE_STATE_START(teco_state_print_octal, + .initial_cb = (teco_state_initial_cb_t)teco_state_print_octal_initial, + .end_of_macro_cb = (teco_state_end_of_macro_cb_t) + teco_state_print_octal_end_of_macro +); -- cgit v1.2.3