patch 8.0.0693: no terminal emulator support
Problem: No terminal emulator support. Cannot properly run commands in the
GUI. Cannot run a job interactively with an ssh connection.
Solution: Very early implementation of the :terminal command. Includes
libvterm converted to ANSI C. Many parts still missing.
diff --git a/src/libvterm/bin/vterm-dump.c b/src/libvterm/bin/vterm-dump.c
new file mode 100644
index 0000000..84a957a
--- /dev/null
+++ b/src/libvterm/bin/vterm-dump.c
@@ -0,0 +1,231 @@
+/* Require getopt(3) */
+#define _XOPEN_SOURCE
+
+#include <stdio.h>
+#include <string.h>
+#define streq(a,b) (strcmp(a,b)==0)
+
+#include <errno.h>
+#include <fcntl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include "vterm.h"
+
+static const char *special_begin = "{";
+static const char *special_end = "}";
+
+static int parser_text(const char bytes[], size_t len, void *user)
+{
+ unsigned char *b = (unsigned char *)bytes;
+
+ int i;
+ for(i = 0; i < len; /* none */) {
+ if(b[i] < 0x20) /* C0 */
+ break;
+ else if(b[i] < 0x80) /* ASCII */
+ i++;
+ else if(b[i] < 0xa0) /* C1 */
+ break;
+ else if(b[i] < 0xc0) /* UTF-8 continuation */
+ break;
+ else if(b[i] < 0xe0) { /* UTF-8 2-byte */
+ /* 2-byte UTF-8 */
+ if(len < i+2) break;
+ i += 2;
+ }
+ else if(b[i] < 0xf0) { /* UTF-8 3-byte */
+ if(len < i+3) break;
+ i += 3;
+ }
+ else if(b[i] < 0xf8) { /* UTF-8 4-byte */
+ if(len < i+4) break;
+ i += 4;
+ }
+ else /* otherwise invalid */
+ break;
+ }
+
+ printf("%.*s", i, b);
+ return i;
+}
+
+/* 0 1 2 3 4 5 6 7 8 9 A B C D E F */
+static const char *name_c0[] = {
+ "NUL", "SOH", "STX", "ETX", "EOT", "ENQ", "ACK", "BEL", "BS", "HT", "LF", "VT", "FF", "CR", "LS0", "LS1",
+ "DLE", "DC1", "DC2", "DC3", "DC4", "NAK", "SYN", "ETB", "CAN", "EM", "SUB", "ESC", "FS", "GS", "RS", "US",
+};
+static const char *name_c1[] = {
+ NULL, NULL, "BPH", "NBH", NULL, "NEL", "SSA", "ESA", "HTS", "HTJ", "VTS", "PLD", "PLU", "RI", "SS2", "SS3",
+ "DCS", "PU1", "PU2", "STS", "CCH", "MW", "SPA", "EPA", "SOS", NULL, "SCI", "CSI", "ST", "OSC", "PM", "APC",
+};
+
+static int parser_control(unsigned char control, void *user)
+{
+ if(control < 0x20)
+ printf("%s%s%s", special_begin, name_c0[control], special_end);
+ else if(control >= 0x80 && control < 0xa0 && name_c1[control - 0x80])
+ printf("%s%s%s", special_begin, name_c1[control - 0x80], special_end);
+ else
+ printf("%sCONTROL 0x%02x%s", special_begin, control, special_end);
+
+ if(control == 0x0a)
+ printf("\n");
+ return 1;
+}
+
+static int parser_escape(const char bytes[], size_t len, void *user)
+{
+ if(bytes[0] >= 0x20 && bytes[0] < 0x30) {
+ if(len < 2)
+ return -1;
+ len = 2;
+ }
+ else {
+ len = 1;
+ }
+
+ printf("%sESC %.*s%s", special_begin, (int)len, bytes, special_end);
+
+ return len;
+}
+
+/* 0 1 2 3 4 5 6 7 8 9 A B C D E F */
+static const char *name_csi_plain[] = {
+ "ICH", "CUU", "CUD", "CUF", "CUB", "CNL", "CPL", "CHA", "CUP", "CHT", "ED", "EL", "IL", "DL", "EF", "EA",
+ "DCH", "SSE", "CPR", "SU", "SD", "NP", "PP", "CTC", "ECH", "CVT", "CBT", "SRS", "PTX", "SDS", "SIMD",NULL,
+ "HPA", "HPR", "REP", "DA", "VPA", "VPR", "HVP", "TBC", "SM", "MC", "HPB", "VPB", "RM", "SGR", "DSR", "DAQ",
+};
+
+/*0 4 8 B */
+static const int newline_csi_plain[] = {
+ 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0,
+};
+
+static int parser_csi(const char *leader, const long args[], int argcount, const char *intermed, char command, void *user)
+{
+ const char *name = NULL;
+ if(!leader && !intermed && command < 0x70)
+ name = name_csi_plain[command - 0x40];
+ else if(leader && streq(leader, "?") && !intermed) {
+ /* DEC */
+ switch(command) {
+ case 'h': name = "DECSM"; break;
+ case 'l': name = "DECRM"; break;
+ }
+ if(name)
+ leader = NULL;
+ }
+
+ if(!leader && !intermed && command < 0x70 && newline_csi_plain[command - 0x40])
+ printf("\n");
+
+ if(name)
+ printf("%s%s", special_begin, name);
+ else
+ printf("%sCSI", special_begin);
+
+ if(leader && leader[0])
+ printf(" %s", leader);
+
+ {
+ int i;
+ for(i = 0; i < argcount; i++) {
+ printf(i ? "," : " ");
+ }
+
+ if(args[i] == CSI_ARG_MISSING)
+ printf("*");
+ else {
+ while(CSI_ARG_HAS_MORE(args[i]))
+ printf("%ld+", CSI_ARG(args[i++]));
+ printf("%ld", CSI_ARG(args[i]));
+ }
+ }
+
+ if(intermed && intermed[0])
+ printf(" %s", intermed);
+
+ if(name)
+ printf("%s", special_end);
+ else
+ printf(" %c%s", command, special_end);
+
+ return 1;
+}
+
+static int parser_osc(const char *command, size_t cmdlen, void *user)
+{
+ printf("%sOSC %.*s%s", special_begin, (int)cmdlen, command, special_end);
+
+ return 1;
+}
+
+static int parser_dcs(const char *command, size_t cmdlen, void *user)
+{
+ printf("%sDCS %.*s%s", special_begin, (int)cmdlen, command, special_end);
+
+ return 1;
+}
+
+static VTermParserCallbacks parser_cbs = {
+ &parser_text, /* text */
+ &parser_control, /* control */
+ &parser_escape, /* escape */
+ &parser_csi, /* csi */
+ &parser_osc, /* osc */
+ &parser_dcs, /* dcs */
+ NULL /* resize */
+};
+
+int main(int argc, char *argv[])
+{
+ int use_colour = isatty(1);
+ const char *file;
+ int fd;
+ VTerm *vt;
+ int len;
+ char buffer[1024];
+
+ int opt;
+ while((opt = getopt(argc, argv, "c")) != -1) {
+ switch(opt) {
+ case 'c': use_colour = 1; break;
+ }
+ }
+
+ file = argv[optind++];
+
+ if(!file || streq(file, "-"))
+ fd = 0; /* stdin */
+ else {
+ fd = open(file, O_RDONLY);
+ if(fd == -1) {
+ fprintf(stderr, "Cannot open %s - %s\n", file, strerror(errno));
+ exit(1);
+ }
+ }
+
+ if(use_colour) {
+ special_begin = "\x1b[7m{";
+ special_end = "}\x1b[m";
+ }
+
+ /* Size matters not for the parser */
+ vt = vterm_new(25, 80);
+ vterm_set_utf8(vt, 1);
+ vterm_parser_set_callbacks(vt, &parser_cbs, NULL);
+
+ while((len = read(fd, buffer, sizeof(buffer))) > 0) {
+ vterm_input_write(vt, buffer, len);
+ }
+
+ printf("\n");
+
+ close(fd);
+ vterm_free(vt);
+ return 0;
+}