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foot/vt.c
Daniel Eklöf b1f8dd75d6
cell: we only need 4 bytes for the longest utf8 sequence 
We don't *have* to NULL-terminate the utf8 string. So don't. This
makes the cell glyph 4 bytes exactly, which is better for alignment
and cache usage.
2019-07-10 18:47:32 +02:00

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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_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},
[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_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");
if (term->vt.private != 0)
c += snprintf(&msg[c], sizeof(msg) - c, "%c", term->vt.private);
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 = vt_param_get(term, 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;
default:
LOG_ERR("%s: invalid charset identifier", esc_as_string(term, final));
abort();
break;
}
break;
}
case 'D':
term_linefeed(term);
break;
case 'M':
term_reverse_index(term);
break;
case 'E':
term_linefeed(term);
term_cursor_left(term, term->cursor.col);
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 '=':
term->keypad_keys_mode = KEYPAD_APPLICATION;
break;
case '>':
term->keypad_keys_mode = KEYPAD_NUMERICAL;
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)
{
strncpy(cell->c, vt100_0[c - 0x41], sizeof(cell->c));
} 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 */
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_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.private = 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");
if (term->vt.private != 0) {
LOG_ERR("only one private/intermediate characters supported");
abort();
}
term->vt.private = c;
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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