mirrors/foot
1
0
Fork 0
mirror of https://codeberg.org/dnkl/foot.git synced 2026-02-05 04:06:08 -05:00
Code Issues Projects Releases Packages Wiki Activity Actions
foot/vt.c
Daniel Eklöf 9b74cedb20
vt: clear CSI parameters lazily 
The CLEAR action is so common, that explicitly clearing the entire
params array, which is kind of big, is too slow.

Clear it lazily instead. Meaning, we only set 'idx' (count) to 0 in
CLEAR. Then whenever we parse a parameter, clear the value and sub
parameters.
2019-08-24 11:33:13 +02:00

1035 lines
39 KiB
C
Raw Blame History

#include "vt.h"
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <assert.h>
#define LOG_MODULE "vt"
#define LOG_ENABLE_DBG 0
#include "log.h"
#include "csi.h"
#include "grid.h"
#include "osc.h"
#define UNHANDLED() LOG_ERR("unhandled: %s", esc_as_string(term, final))
/* 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,
ACTION_UTF8_PRINT,
};
#if defined(_DEBUG) && defined(LOG_ENABLE_DBG) && LOG_ENABLE_DBG
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",
};
#endif
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",
[ACTION_UTF8_PRINT] = "UTF-8 print",
};
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 ... 0x3b] = { .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 ... 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_osc_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 ... 0xff] = {.action = ACTION_OSC_PUT},
[0x18] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x1a] = {.action = ACTION_EXECUTE, .state = STATE_GROUND},
[0x1b] = { .state = STATE_ESCAPE},
#if 0
[0x20 ... 0x7f] = {.action = ACTION_OSC_PUT},
[0x9c] = { .state = STATE_GROUND},
[0xc0 ... 0xdf] = {.action = ACTION_OSC_PUT},
[0xe0 ... 0xef] = {.action = ACTION_OSC_PUT},
[0xf0 ... 0xf7] = {.action = ACTION_OSC_PUT},
/* 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},
#endif
};
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},
[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},
[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},
[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_osc_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 const char *
esc_as_string(struct terminal *term, uint8_t final)
{
static char msg[1024];
int c = snprintf(msg, sizeof(msg), "\\E");
for (size_t i = 0; i < sizeof(term->vt.private) / sizeof(term->vt.private[0]); i++) {
if (term->vt.private[i] == 0)
break;
c += snprintf(&msg[c], sizeof(msg) - c, "%c", term->vt.private[i]);
}
assert(term->vt.params.idx == 0);
c += snprintf(&msg[c], sizeof(msg) - c, "%c", final);
return msg;
}
static void
esc_dispatch(struct terminal *term, uint8_t final)
{
LOG_DBG("ESC: %s", esc_as_string(term, final));
switch (final) {
case '7':
term->saved_cursor = term->cursor;
term->vt.saved_attrs = term->vt.attrs;
break;
case '8':
term_restore_cursor(term);
term->vt.attrs = term->vt.saved_attrs;
break;
case 'c':
term_reset(term, true);
break;
case 'B': {
/* Configure G0-G3 to use ASCII */
char param = term->vt.private[0] != 0 ? term->vt.private[0] : 0;
switch (param) {
case '(': term->charset[0] = CHARSET_ASCII; break;
case ')': term->charset[1] = CHARSET_ASCII; break;
case '*': term->charset[2] = CHARSET_ASCII; break;
case '+': term->charset[3] = CHARSET_ASCII; break;
case 0: break;
default:
UNHANDLED();
break;
}
break;
}
case 'D':
term_linefeed(term);
break;
case 'E':
term_linefeed(term);
term_cursor_left(term, term->cursor.col);
break;
case 'M':
term_reverse_index(term);
break;
case 'N':
/* SS2 - Single Shift 2 */
term->selected_charset = 2; /* G2 */
break;
case 'O':
/* SS3 - Single Shift 3 */
term->selected_charset = 3; /* G3 */
break;
case '\\':
/* ST - String Terminator */
break;
case '0': {
/* Configure G0-G3 to use special chars + line drawing */
char param = term->vt.private[0] != 0 ? term->vt.private[0] : 0;
switch (param) {
case '(': term->charset[0] = CHARSET_GRAPHIC; break;
case ')': term->charset[1] = CHARSET_GRAPHIC; break;
case '*': term->charset[2] = CHARSET_GRAPHIC; break;
case '+': term->charset[3] = CHARSET_GRAPHIC; break;
case 0: break;
default:
UNHANDLED();
break;
}
break;
}
case '=':
term->keypad_keys_mode = KEYPAD_APPLICATION;
break;
case '>':
term->keypad_keys_mode = KEYPAD_NUMERICAL;
break;
default:
UNHANDLED();
break;
}
}
static inline void
pre_print(struct terminal *term)
{
if (unlikely(term->print_needs_wrap) && term->auto_margin) {
if (term->cursor.row == term->scroll_region.end - 1) {
term_scroll(term, 1);
term_cursor_to(term, term->cursor.row, 0);
} else
term_cursor_to(term, term->cursor.row + 1, 0);
}
}
#include <wchar.h>
static inline void
post_print(struct terminal *term)
{
if (term->cursor.col < term->cols - 1)
term_cursor_right(term, 1);
else
term->print_needs_wrap = true;
}
static inline void
print_insert(struct terminal *term)
{
if (unlikely(term->insert_mode)) {
assert(false && "untested");
struct row *row = term->grid->cur_row;
memmove(
&row[term->cursor.col + 1],
&row[term->cursor.col],
term->cols - term->cursor.col - 1);
}
}
static void
action_print_utf8(struct terminal *term)
{
pre_print(term);
struct row *row = term->grid->cur_row;
struct cell *cell = &row->cells[term->cursor.col];
row->dirty = true;
cell->attrs.clean = 0;
print_insert(term);
mbstate_t ps = {0};
if (mbrtowc(&cell->wc, (const char *)term->vt.utf8.data, term->vt.utf8.idx, &ps) < 0)
cell->wc = 0;
term->vt.utf8.idx = 0;
cell->attrs = term->vt.attrs;
int width = wcwidth(cell->wc);
if (width <= 0) {
/* Skip post_print() below - i.e. don't advance cursor */
return;
}
/* Advance cursor the 'additional' columns (last step is done
* by post_print()) */
for (int i = 1; i < width && term->cursor.col < term->cols - 1; i++) {
term_cursor_right(term, 1);
assert(term->cursor.col < term->cols);
struct cell *cell = &row->cells[term->cursor.col];
cell->wc = 0;
cell->attrs.clean = 0;
}
post_print(term);
}
static void
action_print(struct terminal *term, uint8_t c)
{
pre_print(term);
struct row *row = term->grid->cur_row;
struct cell *cell = &row->cells[term->cursor.col];
row->dirty = true;
cell->attrs.clean = 0;
print_insert(term);
/* 0x60 - 0x7e */
static const char *const vt100_0[] = {
"◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
"␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
"⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
"│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
};
if (unlikely(term->charset[term->selected_charset] == CHARSET_GRAPHIC) &&
c >= 0x60 && c <= 0x7e)
{
const char *glyph = vt100_0[c - 0x60];
mbstate_t ps = {0};
if (mbrtowc(&cell->wc, glyph, strlen(glyph), &ps) < 0)
cell->wc = 0;
} else {
//LOG_DBG("print: ASCII: %c", c);
cell->wc = c;
}
cell->attrs = term->vt.attrs;
post_print(term);
}
static void
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 '\0':
break;
case '\n':
/* LF - line feed */
term_linefeed(term);
break;
case '\r':
/* FF - form feed */
term_cursor_left(term, term->cursor.col);
break;
case '\b':
/* backspace */
term_cursor_left(term, 1);
break;
case '\x07':
/* BEL */
LOG_INFO("BELL");
//term_flash(term, 50);
break;
case '\x09': {
/* HT - horizontal tab */
int col = term->cursor.col;
col = (col + 8) / 8 * 8;
term_cursor_right(term, col - term->cursor.col);
break;
}
case '\016':
/* SO - shift out */
term->selected_charset = 1; /* G1 */
break;
case '\017':
/* SI - shift in */
term->selected_charset = 0; /* G0 */
break;
default:
LOG_WARN("execute: ignoring: %c (0x%02x)", c, c);
break;
}
break;
case ACTION_CLEAR:
term->vt.params.idx = 0;
term->vt.private[0] = 0;
term->vt.private[1] = 0;
term->vt.osc.idx = 0;
term->vt.utf8.idx = 0;
break;
case ACTION_PRINT:
action_print(term, c);
break;
case ACTION_UTF8_PRINT:
action_print_utf8(term);
break;
case ACTION_PARAM:
if (term->vt.params.idx == 0) {
term->vt.params.idx = 1;
term->vt.params.v[0].value = 0;
term->vt.params.v[0].sub.idx = 0;
}
if (c == ';') {
term->vt.params.idx++;
term->vt.params.v[term->vt.params.idx - 1].value = 0;
term->vt.params.v[term->vt.params.idx - 1].sub.idx = 0;
term->vt.params.v[term->vt.params.idx - 1].sub.value[0] = 0;
} else if (c == ':') {
struct vt_param *param = &term->vt.params.v[term->vt.params.idx - 1];
param->sub.idx++;
param->sub.value[param->sub.idx] = 0;
} else {
assert(term->vt.params.idx >= 0);
struct vt_param *param = &term->vt.params.v[term->vt.params.idx - 1];
unsigned *value = param->sub.idx > 0
? &param->sub.value[param->sub.idx - 1]
: &param->value;
*value *= 10;
*value += c - '0';
}
break;
case ACTION_COLLECT:
LOG_DBG("collect");
if (term->vt.private[0] == 0)
term->vt.private[0] = c;
else if (term->vt.private[1] == 0)
term->vt.private[1] = c;
else
LOG_ERR("only two private/intermediate characters supported");
break;
case ACTION_ESC_DISPATCH:
esc_dispatch(term, c);
break;
case ACTION_CSI_DISPATCH:
csi_dispatch(term, c);
break;
case ACTION_OSC_START:
term->vt.osc.idx = 0;
break;
case ACTION_OSC_PUT:
if (!osc_ensure_size(term, term->vt.osc.idx + 1))
break;
term->vt.osc.data[term->vt.osc.idx++] = c;
break;
case ACTION_OSC_END:
if (!osc_ensure_size(term, term->vt.osc.idx + 1))
break;
term->vt.osc.data[term->vt.osc.idx] = '\0';
osc_dispatch(term);
break;
case ACTION_HOOK:
case ACTION_PUT:
case ACTION_UNHOOK:
/* We have no parent terminal to pass through to */
break;
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;
action_print_utf8(term);
}
break;
}
}
void
vt_from_slave(struct terminal *term, const uint8_t *data, size_t len)
{
//LOG_DBG("input: 0x%02x", data[i]);
enum state current_state = term->vt.state;
for (size_t i = 0; i < len; i++) {
if (current_state == STATE_UTF8_COLLECT) {
action(term, ACTION_UTF8_COLLECT, data[i]);
current_state = term->vt.state;
continue;
}
const struct state_transition *transition = &states[current_state][data[i]];
assert(transition->action != ACTION_NONE || transition->state != STATE_SAME);
if (transition->state != STATE_SAME) {
enum action exit_action = exit_actions[current_state];
action(term, exit_action, data[i]);
}
action(term, transition->action, data[i]);
if (transition->state != STATE_SAME) {
/*
* LOG_DBG("transition: %s -> %s", state_names[current_state],
* state_names[transition->state]);
*/
term->vt.state = transition->state;
current_state = transition->state;
enum action entry_action = entry_actions[transition->state];
action(term, entry_action, data[i]);
}
}
}
bool
vt_to_slave(struct terminal *term, const void *_data, size_t len)
{
const uint8_t *data = _data;
size_t left = len;
while (left > 0) {
ssize_t ret = write(term->ptmx, data, left);
if (ret < 0) {
LOG_ERRNO("failed to write to client");
return false;
}
data += ret;
left -= ret;
}
return true;
}
Reference in a new issue View git blame Copy permalink