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foot/vt.c
Daniel Eklöf 4e25019ba6
wip: grid is now represented as a grid, not a linear array 
The grid is now represented with an array of row *pointers*. Each row
contains an array of cells (the row's columns).

The main point of having row pointers is we can now move rows around
almost for free.

This is useful when scrolling with scroll margins for example, where
we previously had to copy the lines in the margins. Now it's just a
matter of swapping two pointers.
2019-07-08 13:57:31 +02:00

950 lines
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#include "vt.h"
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#define LOG_MODULE "vt"
#define LOG_ENABLE_DBG 0
#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,
ACTION_UTF8_PRINT,
};
#if 0
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] = { .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 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 < term->vt.intermediates.idx; i++)
c += snprintf(&msg[c], sizeof(msg) - c, "%c", term->vt.intermediates.data[i]);
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->cursor = term->saved_cursor;
term->vt.attrs = term->vt.saved_attrs;
break;
case 'B': {
/* Configure G0-G3 to use ASCII */
char param = term->vt.params.idx > 0 ? term->vt.params.v[0].value : '(';
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;
default:
LOG_ERR("%s: invalid charset identifier", esc_as_string(term, final));
abort();
break;
}
break;
}
case '0': {
/* Configure G0-G3 to use special chars + line drawing */
char param = term->vt.params.idx > 0 ? term->vt.params.v[0].value : '(';
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;
default:
LOG_ERR("%s: invalid charset identifier", esc_as_string(term, final));
abort();
break;
}
break;
}
case 'M':
/* ri - reverse index (scroll reverse) */
term_scroll_reverse(term, 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("unimplemented: ESC: %s", esc_as_string(term, final));
abort();
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);
}
}
static inline void
post_print(struct terminal *term)
{
term->grid->cur_row->dirty = true;
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);
#if 0
term_damage_update(
term, term->cursor.linear + 1, term->cols - term->cursor.col - 1);
#else
row->dirty = true;
#endif
}
}
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];
#if 0
term_damage_update(term, term->cursor.linear, 1);
#else
row->dirty = true;
#endif
print_insert(term);
//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';
term->vt.utf8.idx = 0;
cell->attrs = term->vt.attrs;
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];
#if 0
term_damage_update(term, term->cursor.linear, 1);
#else
row->dirty = true;
#endif
print_insert(term);
static const char *const vt100_0[62] = { /* 0x41 - 0x7e */
"↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
"◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
"␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
"⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
"│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
};
if (unlikely(term->charset[term->selected_charset] == CHARSET_GRAPHIC) &&
c >= 0x41 && c <= 0x7e)
{
strcpy(cell->c, vt100_0[c - 0x41]);
} else {
//LOG_DBG("print: ASCII: %c", c);
cell->c[0] = c;
cell->c[1] = '\0';
}
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 '\n':
/* LF - line feed */
if (term->cursor.row == term->scroll_region.end - 1) {
term_scroll(term, 1);
} else
term_cursor_down(term, 1);
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_WARN("BELL");
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;
}
default:
LOG_ERR("execute: unimplemented: %c (0x%02x)", c, c);
abort();
break;
}
break;
case ACTION_CLEAR:
memset(&term->vt.params, 0, sizeof(term->vt.params));
term->vt.intermediates.idx = 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;
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");
abort();
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 (term->vt.osc.idx < (int)sizeof(term->vt.osc.data) - 1)
term->vt.osc.data[term->vt.osc.idx++] = c;
break;
case ACTION_OSC_END:
assert(term->vt.osc.idx < sizeof(term->vt.osc.data));
term->vt.osc.data[term->vt.osc.idx] = '\0';
osc_dispatch(term);
break;
case ACTION_HOOK:
case ACTION_UNHOOK:
case ACTION_PUT:
LOG_ERR("unimplemented: action %s", action_names[_action]);
abort();
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]);
}
}
}
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