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foot/vt.c
Daniel Eklöf b0a2c54fe8
vt: wip: implement scrolling region 
This is largely untested, but existing scrolling code has been
converted to using a terminal-global scrolling region that is defined
as start-end of the scrollable region.

This is compared to the old code where the scrolling region where
defined in terms of marginals, counted in lines from top and from
bottom.
2019-06-23 18:02:49 +02:00

809 lines
34 KiB
C
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#include "vt.h"
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#define LOG_MODULE "vt"
#define LOG_ENABLE_DBG 1
#include "log.h"
#include "csi.h"
#include "osc.h"
#include "grid.h"
/* https://vt100.net/emu/dec_ansi_parser */
enum state {
STATE_SAME, /* For state_transition */
STATE_GROUND,
STATE_ESCAPE,
STATE_ESCAPE_INTERMEDIATE,
STATE_CSI_ENTRY,
STATE_CSI_PARAM,
STATE_CSI_INTERMEDIATE,
STATE_CSI_IGNORE,
STATE_OSC_STRING,
STATE_DCS_ENTRY,
STATE_DCS_PARAM,
STATE_DCS_INTERMEDIATE,
STATE_DCS_IGNORE,
STATE_DCS_PASSTHROUGH,
STATE_SOS_PM_APC_STRING,
STATE_UTF8_COLLECT,
};
enum action {
ACTION_NONE, /* For state_transition */
ACTION_IGNORE,
ACTION_CLEAR,
ACTION_EXECUTE,
ACTION_PRINT,
ACTION_PARAM,
ACTION_COLLECT,
ACTION_ESC_DISPATCH,
ACTION_CSI_DISPATCH,
ACTION_OSC_START,
ACTION_OSC_END,
ACTION_OSC_PUT,
ACTION_HOOK,
ACTION_UNHOOK,
ACTION_PUT,
ACTION_UTF8_2_ENTRY,
ACTION_UTF8_3_ENTRY,
ACTION_UTF8_4_ENTRY,
ACTION_UTF8_COLLECT,
};
static const char *const state_names[] = {
[STATE_SAME] = "no change",
[STATE_GROUND] = "ground",
[STATE_ESCAPE] = "escape",
[STATE_ESCAPE_INTERMEDIATE] = "escape intermediate",
[STATE_CSI_ENTRY] = "CSI entry",
[STATE_CSI_PARAM] = "CSI param",
[STATE_CSI_INTERMEDIATE] = "CSI intermediate",
[STATE_CSI_IGNORE] = "CSI ignore",
[STATE_OSC_STRING] = "OSC string",
[STATE_DCS_ENTRY] = "DCS entry",
[STATE_DCS_PARAM] = "DCS param",
[STATE_DCS_INTERMEDIATE] = "DCS intermediate",
[STATE_DCS_IGNORE] = "DCS ignore",
[STATE_DCS_PASSTHROUGH] = "DCS passthrough",
[STATE_SOS_PM_APC_STRING] = "sos/pm/apc string",
[STATE_UTF8_COLLECT] = "UTF-8",
};
static const char *const action_names[] __attribute__((unused)) = {
[ACTION_NONE] = "no action",
[ACTION_IGNORE] = "ignore",
[ACTION_CLEAR] = "clear",
[ACTION_EXECUTE] = "execute",
[ACTION_PRINT] = "print",
[ACTION_PARAM] = "param",
[ACTION_COLLECT] = "collect",
[ACTION_ESC_DISPATCH] = "ESC dispatch",
[ACTION_CSI_DISPATCH] = "CSI dispatch",
[ACTION_OSC_START] = "OSC start",
[ACTION_OSC_END] = "OSC end",
[ACTION_OSC_PUT] = "OSC put",
[ACTION_HOOK] = "hook",
[ACTION_UNHOOK] = "unhook",
[ACTION_PUT] = "put",
[ACTION_UTF8_2_ENTRY] = "UTF-8 (2 chars) begin",
[ACTION_UTF8_3_ENTRY] = "UTF-8 (3 chars) begin",
[ACTION_UTF8_4_ENTRY] = "UTF-8 (4 chars) begin",
[ACTION_UTF8_COLLECT] = "UTF-8 collect",
};
struct state_transition {
enum action action;
enum state state;
};
#if 0
static const struct state_transition state_anywhere[256] = {
[0x18] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x1a] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x1b] = { .state = STATE_ESCAPE},
[0x80 ... 0x8f] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x90] = { .state = STATE_DCS_ENTRY},
[0x91 ... 0x97] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x98] = { .state = STATE_SOS_PM_APC_STRING},
[0x99] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x9a] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x9b] = { .state = STATE_CSI_ENTRY},
[0x9c] = { .state = STATE_GROUND},
[0x9d] = { .state = STATE_OSC_STRING},
[0x9e ... 0x9f] = { .state = STATE_SOS_PM_APC_STRING},
};
#endif
static const struct state_transition state_ground[256] = {
[0x00 ... 0x17] = {.action = ACTION_EXECUTE},
[0x19] = {.action = ACTION_EXECUTE},
[0x1c ... 0x1f] = {.action = ACTION_EXECUTE},
[0x20 ... 0x7f] = {.action = ACTION_PRINT},
[0xc0 ... 0xdf] = {.action = ACTION_UTF8_2_ENTRY, .state = STATE_UTF8_COLLECT},
[0xe0 ... 0xef] = {.action = ACTION_UTF8_3_ENTRY, .state = STATE_UTF8_COLLECT},
[0xf0 ... 0xf7] = {.action = ACTION_UTF8_4_ENTRY, .state = STATE_UTF8_COLLECT},
/* Anywhere */
[0x18] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x1a] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x1b] = { .state = STATE_ESCAPE},
[0x80 ... 0x8f] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x90] = { .state = STATE_DCS_ENTRY},
[0x91 ... 0x97] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x98] = { .state = STATE_SOS_PM_APC_STRING},
[0x99] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x9a] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x9b] = { .state = STATE_CSI_ENTRY},
[0x9c] = { .state = STATE_GROUND},
[0x9d] = { .state = STATE_OSC_STRING},
[0x9e ... 0x9f] = { .state = STATE_SOS_PM_APC_STRING},
};
static const struct state_transition state_escape[256] = {
[0x00 ... 0x17] = {.action = ACTION_EXECUTE},
[0x19] = {.action = ACTION_EXECUTE},
[0x1c ... 0x1f] = {.action = ACTION_EXECUTE},
[0x20 ... 0x2f] = {.action = ACTION_COLLECT, .state = STATE_ESCAPE_INTERMEDIATE},
[0x30 ... 0x4f] = {.action = ACTION_ESC_DISPATCH, .state = STATE_GROUND},
[0x50] = { .state = STATE_DCS_ENTRY},
[0x51 ... 0x57] = {.action = ACTION_ESC_DISPATCH, .state = STATE_GROUND},
[0x58] = { .state = STATE_SOS_PM_APC_STRING},
[0x59] = {.action = ACTION_ESC_DISPATCH, .state = STATE_GROUND},
[0x5a] = {.action = ACTION_ESC_DISPATCH, .state = STATE_GROUND},
[0x5b] = { .state = STATE_CSI_ENTRY},
[0x5c] = {.action = ACTION_ESC_DISPATCH, .state = STATE_GROUND},
[0x5d] = { .state = STATE_OSC_STRING},
[0x5e ... 0x5f] = { .state = STATE_SOS_PM_APC_STRING},
[0x60 ... 0x7e] = {.action = ACTION_ESC_DISPATCH, .state = STATE_GROUND},
[0x7f] = {.action = ACTION_IGNORE},
/* Anywhere */
[0x18] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x1a] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x1b] = { .state = STATE_ESCAPE},
[0x80 ... 0x8f] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x90] = { .state = STATE_DCS_ENTRY},
[0x91 ... 0x97] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x98] = { .state = STATE_SOS_PM_APC_STRING},
[0x99] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x9a] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x9b] = { .state = STATE_CSI_ENTRY},
[0x9c] = { .state = STATE_GROUND},
[0x9d] = { .state = STATE_OSC_STRING},
[0x9e ... 0x9f] = { .state = STATE_SOS_PM_APC_STRING},
};
static const struct state_transition state_escape_intermediate[256] = {
[0x00 ... 0x17] = {.action = ACTION_EXECUTE},
[0x19] = {.action = ACTION_EXECUTE},
[0x1c ... 0x1f] = {.action = ACTION_EXECUTE},
[0x20 ... 0x2f] = {.action = ACTION_COLLECT},
[0x30 ... 0x7e] = {.action = ACTION_ESC_DISPATCH, .state = STATE_GROUND},
[0x7f] = {.action = ACTION_IGNORE},
/* Anywhere */
[0x18] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x1a] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x1b] = { .state = STATE_ESCAPE},
[0x80 ... 0x8f] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x90] = { .state = STATE_DCS_ENTRY},
[0x91 ... 0x97] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x98] = { .state = STATE_SOS_PM_APC_STRING},
[0x99] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x9a] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x9b] = { .state = STATE_CSI_ENTRY},
[0x9c] = { .state = STATE_GROUND},
[0x9d] = { .state = STATE_OSC_STRING},
[0x9e ... 0x9f] = { .state = STATE_SOS_PM_APC_STRING},
};
static const struct state_transition state_csi_entry[256] = {
[0x00 ... 0x17] = {.action = ACTION_EXECUTE},
[0x19] = {.action = ACTION_EXECUTE},
[0x1c ... 0x1f] = {.action = ACTION_EXECUTE},
[0x20 ... 0x2f] = {.action = ACTION_COLLECT, .state = STATE_CSI_INTERMEDIATE},
[0x30 ... 0x39] = {.action = ACTION_PARAM, .state = STATE_CSI_PARAM},
[0x3a] = { .state = STATE_CSI_IGNORE},
[0x3b] = {.action = ACTION_PARAM, .state = STATE_CSI_PARAM},
[0x3c ... 0x3f] = {.action = ACTION_COLLECT, .state = STATE_CSI_PARAM},
[0x40 ... 0x7e] = {.action = ACTION_CSI_DISPATCH, .state = STATE_GROUND},
[0x7f] = {.action = ACTION_IGNORE},
/* Anywhere */
[0x18] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x1a] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x1b] = { .state = STATE_ESCAPE},
[0x80 ... 0x8f] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x90] = { .state = STATE_DCS_ENTRY},
[0x91 ... 0x97] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x98] = { .state = STATE_SOS_PM_APC_STRING},
[0x99] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x9a] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x9b] = { .state = STATE_CSI_ENTRY},
[0x9c] = { .state = STATE_GROUND},
[0x9d] = { .state = STATE_OSC_STRING},
[0x9e ... 0x9f] = { .state = STATE_SOS_PM_APC_STRING},
};
static const struct state_transition state_csi_param[256] = {
[0x00 ... 0x17] = {.action = ACTION_EXECUTE},
[0x19] = {.action = ACTION_EXECUTE},
[0x1c ... 0x1f] = {.action = ACTION_EXECUTE},
[0x20 ... 0x2f] = {.action = ACTION_COLLECT, .state = STATE_CSI_INTERMEDIATE},
[0x30 ... 0x39] = {.action = ACTION_PARAM},
[0x3a] = { .state = STATE_CSI_IGNORE},
[0x3b] = {.action = ACTION_PARAM},
[0x3c ... 0x3f] = { .state = STATE_CSI_IGNORE},
[0x40 ... 0x7e] = {.action = ACTION_CSI_DISPATCH, .state = STATE_GROUND},
[0x7f] = {.action = ACTION_IGNORE},
/* Anywhere */
[0x18] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x1a] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x1b] = { .state = STATE_ESCAPE},
[0x80 ... 0x8f] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x90] = { .state = STATE_DCS_ENTRY},
[0x91 ... 0x97] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x98] = { .state = STATE_SOS_PM_APC_STRING},
[0x99] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x9a] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x9b] = { .state = STATE_CSI_ENTRY},
[0x9c] = { .state = STATE_GROUND},
[0x9d] = { .state = STATE_OSC_STRING},
[0x9e ... 0x9f] = { .state = STATE_SOS_PM_APC_STRING},
};
static const struct state_transition state_csi_intermediate[256] = {
[0x00 ... 0x17] = {.action = ACTION_EXECUTE},
[0x19] = {.action = ACTION_EXECUTE},
[0x1c ... 0x1f] = {.action = ACTION_EXECUTE},
[0x20 ... 0x2f] = {.action = ACTION_COLLECT},
[0x30 ... 0x3f] = { .state = STATE_CSI_IGNORE},
[0x40 ... 0x7e] = {.action = ACTION_CSI_DISPATCH, .state = STATE_GROUND},
[0x7f] = {.action = ACTION_IGNORE},
/* Anywhere */
[0x18] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x1a] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x1b] = { .state = STATE_ESCAPE},
[0x80 ... 0x8f] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x90] = { .state = STATE_DCS_ENTRY},
[0x91 ... 0x97] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x98] = { .state = STATE_SOS_PM_APC_STRING},
[0x99] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x9a] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x9b] = { .state = STATE_CSI_ENTRY},
[0x9c] = { .state = STATE_GROUND},
[0x9d] = { .state = STATE_OSC_STRING},
[0x9e ... 0x9f] = { .state = STATE_SOS_PM_APC_STRING},
};
static const struct state_transition state_csi_ignore[256] = {
[0x00 ... 0x17] = {.action = ACTION_EXECUTE},
[0x19] = {.action = ACTION_EXECUTE},
[0x1c ... 0x1f] = {.action = ACTION_EXECUTE},
[0x20 ... 0x3f] = {.action = ACTION_IGNORE},
[0x40 ... 0x7e] = { .state = STATE_GROUND},
[0x7f] = {.action = ACTION_IGNORE},
/* Anywhere */
[0x18] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x1a] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x1b] = { .state = STATE_ESCAPE},
[0x80 ... 0x8f] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x90] = { .state = STATE_DCS_ENTRY},
[0x91 ... 0x97] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x98] = { .state = STATE_SOS_PM_APC_STRING},
[0x99] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x9a] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x9b] = { .state = STATE_CSI_ENTRY},
[0x9c] = { .state = STATE_GROUND},
[0x9d] = { .state = STATE_OSC_STRING},
[0x9e ... 0x9f] = { .state = STATE_SOS_PM_APC_STRING},
};
static const struct state_transition state_ocs_string[256] = {
[0x00 ... 0x06] = {.action = ACTION_IGNORE},
[0x07] = { .state = STATE_GROUND},
[0x08 ... 0x17] = {.action = ACTION_IGNORE},
[0x19] = {.action = ACTION_IGNORE},
[0x1c ... 0x1f] = {.action = ACTION_IGNORE},
[0x20 ... 0x7f] = {.action = ACTION_OSC_PUT},
[0x9c] = { .state = STATE_GROUND},
/* Anywhere */
[0x18] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x1a] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x1b] = { .state = STATE_ESCAPE},
[0x80 ... 0x8f] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x90] = { .state = STATE_DCS_ENTRY},
[0x91 ... 0x97] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x98] = { .state = STATE_SOS_PM_APC_STRING},
[0x99] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x9a] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x9b] = { .state = STATE_CSI_ENTRY},
[0x9c] = { .state = STATE_GROUND},
[0x9d] = { .state = STATE_OSC_STRING},
[0x9e ... 0x9f] = { .state = STATE_SOS_PM_APC_STRING},
};
static const struct state_transition state_dcs_entry[256] = {
[0x00 ... 0x17] = {.action = ACTION_IGNORE},
[0x19] = {.action = ACTION_IGNORE},
[0x1c ... 0x1f] = {.action = ACTION_IGNORE},
[0x20 ... 0x2f] = {.action = ACTION_COLLECT, .state = STATE_DCS_INTERMEDIATE},
[0x30 ... 0x39] = {.action = ACTION_PARAM, .state = STATE_DCS_PARAM},
[0x3a] = { .state = STATE_DCS_IGNORE},
[0x3b] = {.action = ACTION_PARAM, .state = STATE_DCS_PARAM},
[0x3c ... 0x3f] = {.action = ACTION_COLLECT, .state = STATE_DCS_PARAM},
[0x40 ... 0x7e] = { .state = STATE_DCS_PASSTHROUGH},
[0x7f] = {.action = ACTION_IGNORE},
/* Anywhere */
[0x18] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x1a] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x1b] = { .state = STATE_ESCAPE},
[0x80 ... 0x8f] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x90] = { .state = STATE_DCS_ENTRY},
[0x91 ... 0x97] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x98] = { .state = STATE_SOS_PM_APC_STRING},
[0x99] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x9a] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x9b] = { .state = STATE_CSI_ENTRY},
[0x9c] = { .state = STATE_GROUND},
[0x9d] = { .state = STATE_OSC_STRING},
[0x9e ... 0x9f] = { .state = STATE_SOS_PM_APC_STRING},
};
static const struct state_transition state_dcs_param[256] = {
[0x00 ... 0x17] = {.action = ACTION_IGNORE},
[0x19] = {.action = ACTION_IGNORE},
[0x1c ... 0x1f] = {.action = ACTION_IGNORE},
[0x20 ... 0x2f] = {.action = ACTION_COLLECT, .state = STATE_DCS_INTERMEDIATE},
[0x30 ... 0x39] = {.action = ACTION_PARAM},
[0x3a] = { .state = STATE_DCS_IGNORE},
[0x3b] = {.action = ACTION_PARAM},
[0x3c ... 0x3f] = { .state = STATE_DCS_IGNORE},
[0x40 ... 0x7e] = { .state = STATE_DCS_PASSTHROUGH},
[0x7f] = {.action = ACTION_IGNORE},
/* Anywhere */
[0x18] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x1a] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x1b] = { .state = STATE_ESCAPE},
[0x80 ... 0x8f] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x90] = { .state = STATE_DCS_ENTRY},
[0x91 ... 0x97] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x98] = { .state = STATE_SOS_PM_APC_STRING},
[0x99] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x9a] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x9b] = { .state = STATE_CSI_ENTRY},
[0x9c] = { .state = STATE_GROUND},
[0x9d] = { .state = STATE_OSC_STRING},
[0x9e ... 0x9f] = { .state = STATE_SOS_PM_APC_STRING},
};
static const struct state_transition state_dcs_intermediate[256] = {
[0x00 ... 0x17] = {.action = ACTION_IGNORE},
[0x19] = {.action = ACTION_IGNORE},
[0x1c ... 0x1f] = {.action = ACTION_IGNORE},
[0x20 ... 0x2f] = {.action = ACTION_COLLECT},
[0x30 ... 0x3f] = { .state = STATE_DCS_IGNORE},
[0x40 ... 0x7e] = { .state = STATE_DCS_PASSTHROUGH},
[0x7f] = {.action = ACTION_IGNORE},
/* Anywhere */
[0x18] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x1a] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x1b] = { .state = STATE_ESCAPE},
[0x80 ... 0x8f] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x90] = { .state = STATE_DCS_ENTRY},
[0x91 ... 0x97] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x98] = { .state = STATE_SOS_PM_APC_STRING},
[0x99] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x9a] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x9b] = { .state = STATE_CSI_ENTRY},
[0x9c] = { .state = STATE_GROUND},
[0x9d] = { .state = STATE_OSC_STRING},
[0x9e ... 0x9f] = { .state = STATE_SOS_PM_APC_STRING},
};
static const struct state_transition state_dcs_ignore[256] = {
[0x00 ... 0x17] = {.action = ACTION_IGNORE},
[0x19] = {.action = ACTION_IGNORE},
[0x1c ... 0x1f] = {.action = ACTION_IGNORE},
[0x20 ... 0x7f] = {.action = ACTION_IGNORE},
[0x9c] = { .state = STATE_GROUND},
/* Anywhere */
[0x18] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x1a] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x1b] = { .state = STATE_ESCAPE},
[0x80 ... 0x8f] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x90] = { .state = STATE_DCS_ENTRY},
[0x91 ... 0x97] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x98] = { .state = STATE_SOS_PM_APC_STRING},
[0x99] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x9a] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x9b] = { .state = STATE_CSI_ENTRY},
[0x9c] = { .state = STATE_GROUND},
[0x9d] = { .state = STATE_OSC_STRING},
[0x9e ... 0x9f] = { .state = STATE_SOS_PM_APC_STRING},
};
static const struct state_transition state_dcs_passthrough[256] = {
[0x00 ... 0x17] = {.action = ACTION_PUT},
[0x19] = {.action = ACTION_PUT},
[0x1c ... 0x7e] = {.action = ACTION_PUT},
[0x7f] = {.action = ACTION_IGNORE},
[0x9c] = { .state = STATE_GROUND},
/* Anywhere */
[0x18] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x1a] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x1b] = { .state = STATE_ESCAPE},
[0x80 ... 0x8f] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x90] = { .state = STATE_DCS_ENTRY},
[0x91 ... 0x97] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x98] = { .state = STATE_SOS_PM_APC_STRING},
[0x99] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x9a] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x9b] = { .state = STATE_CSI_ENTRY},
[0x9c] = { .state = STATE_GROUND},
[0x9d] = { .state = STATE_OSC_STRING},
[0x9e ... 0x9f] = { .state = STATE_SOS_PM_APC_STRING},
};
static const struct state_transition state_sos_pm_apc_string[256] = {
[0x00 ... 0x17] = {.action = ACTION_IGNORE},
[0x19] = {.action = ACTION_IGNORE},
[0x1c ... 0x7f] = {.action = ACTION_IGNORE},
[0x9c] = { .state = STATE_GROUND},
/* Anywhere */
[0x18] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x1a] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x1b] = { .state = STATE_ESCAPE},
[0x80 ... 0x8f] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x90] = { .state = STATE_DCS_ENTRY},
[0x91 ... 0x97] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x98] = { .state = STATE_SOS_PM_APC_STRING},
[0x99] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x9a] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x9b] = { .state = STATE_CSI_ENTRY},
[0x9c] = { .state = STATE_GROUND},
[0x9d] = { .state = STATE_OSC_STRING},
[0x9e ... 0x9f] = { .state = STATE_SOS_PM_APC_STRING},
};
static const struct state_transition* states[] = {
[STATE_GROUND] = state_ground,
[STATE_ESCAPE] = state_escape,
[STATE_ESCAPE_INTERMEDIATE] = state_escape_intermediate,
[STATE_CSI_ENTRY] = state_csi_entry,
[STATE_CSI_PARAM] = state_csi_param,
[STATE_CSI_INTERMEDIATE] = state_csi_intermediate,
[STATE_CSI_IGNORE] = state_csi_ignore,
[STATE_OSC_STRING] = state_ocs_string,
[STATE_DCS_ENTRY] = state_dcs_entry,
[STATE_DCS_PARAM] = state_dcs_param,
[STATE_DCS_INTERMEDIATE] = state_dcs_intermediate,
[STATE_DCS_IGNORE] = state_dcs_ignore,
[STATE_DCS_PASSTHROUGH] = state_dcs_passthrough,
[STATE_SOS_PM_APC_STRING] = state_sos_pm_apc_string,
};
static const enum action entry_actions[] = {
[STATE_SAME] = ACTION_NONE,
[STATE_GROUND] = ACTION_NONE,
[STATE_ESCAPE] = ACTION_CLEAR,
[STATE_CSI_ENTRY] = ACTION_CLEAR,
[STATE_CSI_PARAM] = ACTION_NONE,
[STATE_CSI_INTERMEDIATE] = ACTION_NONE,
[STATE_CSI_IGNORE] = ACTION_NONE,
[STATE_OSC_STRING] = ACTION_OSC_START,
[STATE_UTF8_COLLECT] = ACTION_NONE,
[STATE_DCS_ENTRY] = ACTION_CLEAR,
[STATE_DCS_PARAM] = ACTION_NONE,
[STATE_DCS_INTERMEDIATE] = ACTION_NONE,
[STATE_DCS_IGNORE] = ACTION_NONE,
[STATE_DCS_PASSTHROUGH] = ACTION_HOOK,
[STATE_SOS_PM_APC_STRING] = ACTION_NONE,
};
static const enum action exit_actions[] = {
[STATE_SAME] = ACTION_NONE,
[STATE_GROUND] = ACTION_NONE,
[STATE_ESCAPE] = ACTION_NONE,
[STATE_CSI_ENTRY] = ACTION_NONE,
[STATE_CSI_PARAM] = ACTION_NONE,
[STATE_CSI_INTERMEDIATE] = ACTION_NONE,
[STATE_CSI_IGNORE] = ACTION_NONE,
[STATE_OSC_STRING] = ACTION_OSC_END,
[STATE_UTF8_COLLECT] = ACTION_NONE,
[STATE_DCS_ENTRY] = ACTION_NONE,
[STATE_DCS_PARAM] = ACTION_NONE,
[STATE_DCS_INTERMEDIATE] = ACTION_NONE,
[STATE_DCS_IGNORE] = ACTION_NONE,
[STATE_DCS_PASSTHROUGH] = ACTION_UNHOOK,
[STATE_SOS_PM_APC_STRING] = ACTION_NONE,
};
static bool
esc_dispatch(struct terminal *term, uint8_t final)
{
#if defined(_DEBUG)
char log[1024];
int c = snprintf(log, sizeof(log), "ESC: ");
for (size_t i = 0; i < term->vt.intermediates.idx; i++)
c += snprintf(&log[c], sizeof(log) - c, "%c", term->vt.intermediates.data[i]);
c += snprintf(&log[c], sizeof(log) - c, "%c", final);
LOG_DBG("%s", log);
#endif
switch (final) {
case 'M':
/* ri - reverse index (scroll reverse) */
grid_scroll_reverse(&term->grid, 1);
break;
case '=':
/* Other half of xterm's smkx */
LOG_WARN("unimplemented: keypad mode change");
break;
case '>':
/* Other half of xterm's rmkx */
LOG_WARN("unimplemented: keypad mode change");
break;
default:
LOG_ERR("ESC: unimplemented final: %c", final);
return false;
}
return true;
}
static bool
action(struct terminal *term, enum action action, uint8_t c)
{
switch (action) {
case ACTION_NONE:
break;
case ACTION_IGNORE:
break;
case ACTION_EXECUTE:
LOG_DBG("execute: 0x%02x", c);
switch (c) {
case '\n':
if (term->grid.cursor.row == term->grid.rows - 1) {
grid_scroll(&term->grid, 1);
/* TODO: simulate \r? */
} else
grid_cursor_down(&term->grid, 1);
break;
case '\r':
grid_cursor_left(&term->grid, term->grid.cursor.col);
break;
case '\b':
grid_cursor_left(&term->grid, 1);
break;
case '\x07':
LOG_WARN("BELL");
break;
default:
LOG_ERR("execute: unimplemented: %c", c);
return false;
}
return true;
case ACTION_CLEAR:
memset(&term->vt.params, 0, sizeof(term->vt.params));
memset(&term->vt.intermediates, 0, sizeof(term->vt.intermediates));
memset(&term->vt.osc, 0, sizeof(term->vt.osc));
memset(&term->vt.utf8, 0, sizeof(term->vt.utf8));
break;
case ACTION_PRINT: {
if (term->grid.print_needs_wrap) {
if (term->grid.cursor.row == term->grid.rows - 1) {
grid_scroll(&term->grid, 1);
grid_cursor_to(&term->grid, term->grid.cursor.row, 0);
} else
grid_cursor_to(&term->grid, term->grid.cursor.row + 1, 0);
}
struct cell *cell = &term->grid.cells[term->grid.linear_cursor];
grid_damage_update(&term->grid, term->grid.linear_cursor, 1);
if (term->vt.utf8.idx > 0) {
//LOG_DBG("print: UTF8: %.*s", (int)term->vt.utf8.idx, term->vt.utf8.data);
memcpy(cell->c, term->vt.utf8.data, term->vt.utf8.idx);
cell->c[term->vt.utf8.idx] = '\0';
memset(&term->vt.utf8, 0, sizeof(term->vt.utf8));
} else {
//LOG_DBG("print: ASCII: %c", c);
cell->c[0] = c;
cell->c[1] = '\0';
}
cell->attrs = term->vt.attrs;
if (term->grid.cursor.col < term->grid.cols - 1)
grid_cursor_right(&term->grid, 1);
else
term->grid.print_needs_wrap = true;
break;
}
case ACTION_PARAM:{
if (term->vt.params.idx == 0)
term->vt.params.idx = 1;
if (c == ';') {
term->vt.params.idx++;
} else if (c == ':') {
if (term->vt.params.v[term->vt.params.idx - 1].sub.idx == 0)
term->vt.params.v[term->vt.params.idx - 1].sub.idx = 1;
} else {
if (term->vt.params.v[term->vt.params.idx - 1].sub.idx > 0)
term->vt.params.v[term->vt.params.idx - 1].sub.value[term->vt.params.v[term->vt.params.idx - 1].sub.idx] *= 10;
else
term->vt.params.v[term->vt.params.idx - 1].value *= 10;
if (term->vt.params.v[term->vt.params.idx - 1].sub.idx > 0)
term->vt.params.v[term->vt.params.idx - 1].sub.value[term->vt.params.v[term->vt.params.idx - 1].sub.idx] += c - '0';
else
term->vt.params.v[term->vt.params.idx - 1].value += c - '0';
}
break;
}
case ACTION_COLLECT:
LOG_DBG("collect");
term->vt.intermediates.data[term->vt.intermediates.idx++] = c;
break;
LOG_ERR("unimplemented: action ESC dispatch");
return false;
case ACTION_ESC_DISPATCH:
return esc_dispatch(term, c);
break;
case ACTION_CSI_DISPATCH:
return csi_dispatch(term, c);
case ACTION_OSC_START:
term->vt.osc.idx = 0;
break;
case ACTION_OSC_PUT:
term->vt.osc.data[term->vt.osc.idx++] = c;
break;
case ACTION_OSC_END:
return osc_dispatch(term);
case ACTION_HOOK:
case ACTION_UNHOOK:
case ACTION_PUT:
LOG_ERR("unimplemented: action %s", action_names[action]);
return false;
case ACTION_UTF8_2_ENTRY:
term->vt.utf8.idx = 0;
term->vt.utf8.left = 2;
term->vt.utf8.data[term->vt.utf8.idx++] = c;
term->vt.utf8.left--;
break;
case ACTION_UTF8_3_ENTRY:
term->vt.utf8.idx = 0;
term->vt.utf8.left = 3;
term->vt.utf8.data[term->vt.utf8.idx++] = c;
term->vt.utf8.left--;
break;
case ACTION_UTF8_4_ENTRY:
term->vt.utf8.idx = 0;
term->vt.utf8.left = 4;
term->vt.utf8.data[term->vt.utf8.idx++] = c;
term->vt.utf8.left--;
break;
case ACTION_UTF8_COLLECT:
term->vt.utf8.data[term->vt.utf8.idx++] = c;
if (--term->vt.utf8.left == 0)
term->vt.state = STATE_GROUND;
break;
}
return true;
}
void
vt_from_slave(struct terminal *term, const uint8_t *data, size_t len)
{
//int cursor = term->grid.cursor;
for (size_t i = 0; i < len; i++) {
//LOG_DBG("input: 0x%02x", data[i]);
enum state current_state = term->vt.state;
if (current_state == STATE_UTF8_COLLECT) {
if (!action(term, ACTION_UTF8_COLLECT, data[i]))
abort();
current_state = term->vt.state;
if (current_state == STATE_UTF8_COLLECT)
continue;
if (!action(term, ACTION_PRINT, 0))
abort();
continue;
}
const struct state_transition *transition = &states[current_state][data[i]];
if (transition->action == ACTION_NONE && transition->state == STATE_SAME) {
LOG_ERR("unimplemented transition from %s: 0x%02x",
state_names[current_state], data[i]);
abort();
}
if (transition->state != STATE_SAME) {
enum action exit_action = exit_actions[current_state];
if (exit_action != ACTION_NONE && !action(term, exit_action, data[i]))
abort();
}
if (!action(term, transition->action, data[i]))
abort();
if (transition->state != STATE_SAME) {
/*
* LOG_DBG("transition: %s -> %s", state_names[current_state],
* state_names[transition->state]);
*/
term->vt.state = transition->state;
enum action entry_action = entry_actions[transition->state];
if (entry_action != ACTION_NONE && !action(term, entry_action, data[i]))
abort();
}
}
}
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