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-rw-r--r--hackvr_term/libtmt/tmt.c500
1 files changed, 500 insertions, 0 deletions
diff --git a/hackvr_term/libtmt/tmt.c b/hackvr_term/libtmt/tmt.c
new file mode 100644
index 0000000..26c122e
--- /dev/null
+++ b/hackvr_term/libtmt/tmt.c
@@ -0,0 +1,500 @@
+/* Copyright (c) 2017 Rob King
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * * Neither the name of the copyright holder nor the
+ * names of contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS,
+ * COPYRIGHT HOLDERS, OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#include <limits.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "tmt.h"
+
+#define BUF_MAX 100
+#define PAR_MAX 8
+#define TAB 8
+#define MAX(x, y) (((size_t)(x) > (size_t)(y)) ? (size_t)(x) : (size_t)(y))
+#define MIN(x, y) (((size_t)(x) < (size_t)(y)) ? (size_t)(x) : (size_t)(y))
+#define CLINE(vt) (vt)->screen.lines[MIN((vt)->curs.r, (vt)->screen.nline - 1)]
+
+#define P0(x) (vt->pars[x])
+#define P1(x) (vt->pars[x]? vt->pars[x] : 1)
+#define CB(vt, m, a) ((vt)->cb? (vt)->cb(m, vt, a, (vt)->p) : (void)0)
+#define INESC ((vt)->state)
+
+#define COMMON_VARS \
+ TMTSCREEN *s = &vt->screen; \
+ TMTPOINT *c = &vt->curs; \
+ TMTLINE *l = CLINE(vt); \
+ TMTCHAR *t = vt->tabs->chars
+
+#define HANDLER(name) static void name (TMT *vt) { COMMON_VARS;
+
+struct TMT{
+ TMTPOINT curs, oldcurs;
+ TMTATTRS attrs, oldattrs;
+
+ bool dirty, acs, ignored;
+ TMTSCREEN screen;
+ TMTLINE *tabs;
+
+ TMTCALLBACK cb;
+ void *p;
+ const wchar_t *acschars;
+
+ mbstate_t ms;
+ size_t nmb;
+ char mb[BUF_MAX + 1];
+
+ size_t pars[PAR_MAX];
+ size_t npar;
+ size_t arg;
+ enum {S_NUL, S_ESC, S_ARG} state;
+};
+
+static TMTATTRS defattrs = {.fg = TMT_COLOR_DEFAULT, .bg = TMT_COLOR_DEFAULT};
+static void writecharatcurs(TMT *vt, wchar_t w);
+
+static wchar_t
+tacs(const TMT *vt, unsigned char c)
+{
+ /* The terminfo alternate character set for ANSI. */
+ static unsigned char map[] = {0020U, 0021U, 0030U, 0031U, 0333U, 0004U,
+ 0261U, 0370U, 0361U, 0260U, 0331U, 0277U,
+ 0332U, 0300U, 0305U, 0176U, 0304U, 0304U,
+ 0304U, 0137U, 0303U, 0264U, 0301U, 0302U,
+ 0263U, 0363U, 0362U, 0343U, 0330U, 0234U,
+ 0376U};
+ for (size_t i = 0; i < sizeof(map); i++) if (map[i] == c)
+ return vt->acschars[i];
+ return (wchar_t)c;
+}
+
+static void
+dirtylines(TMT *vt, size_t s, size_t e)
+{
+ vt->dirty = true;
+ for (size_t i = s; i < e; i++)
+ vt->screen.lines[i]->dirty = true;
+}
+
+static void
+clearline(TMT *vt, TMTLINE *l, size_t s, size_t e)
+{
+ vt->dirty = l->dirty = true;
+ for (size_t i = s; i < e && i < vt->screen.ncol; i++){
+ l->chars[i].a = defattrs;
+ l->chars[i].c = L' ';
+ }
+}
+
+static void
+clearlines(TMT *vt, size_t r, size_t n)
+{
+ for (size_t i = r; i < r + n && i < vt->screen.nline; i++)
+ clearline(vt, vt->screen.lines[i], 0, vt->screen.ncol);
+}
+
+static void
+scrup(TMT *vt, size_t r, size_t n)
+{
+ n = MIN(n, vt->screen.nline - 1 - r);
+
+ if (n){
+ TMTLINE *buf[n];
+
+ memcpy(buf, vt->screen.lines + r, n * sizeof(TMTLINE *));
+ memmove(vt->screen.lines + r, vt->screen.lines + r + n,
+ (vt->screen.nline - n - r) * sizeof(TMTLINE *));
+ memcpy(vt->screen.lines + (vt->screen.nline - n),
+ buf, n * sizeof(TMTLINE *));
+
+ clearlines(vt, vt->screen.nline - n, n);
+ dirtylines(vt, r, vt->screen.nline);
+ }
+}
+
+static void
+scrdn(TMT *vt, size_t r, size_t n)
+{
+ n = MIN(n, vt->screen.nline - 1 - r);
+
+ if (n){
+ TMTLINE *buf[n];
+
+ memcpy(buf, vt->screen.lines + (vt->screen.nline - n),
+ n * sizeof(TMTLINE *));
+ memmove(vt->screen.lines + r + n, vt->screen.lines + r,
+ (vt->screen.nline - n - r) * sizeof(TMTLINE *));
+ memcpy(vt->screen.lines + r, buf, n * sizeof(TMTLINE *));
+
+ clearlines(vt, r, n);
+ dirtylines(vt, r, vt->screen.nline);
+ }
+}
+
+HANDLER(ed)
+ size_t b = 0;
+ size_t e = s->nline;
+
+ switch (P0(0)){
+ case 0: b = c->r + 1; clearline(vt, l, c->c, vt->screen.ncol); break;
+ case 1: e = c->r - 1; clearline(vt, l, 0, c->c); break;
+ case 2: /* use defaults */ break;
+ default: /* do nothing */ return;
+ }
+
+ clearlines(vt, b, e - b);
+}
+
+HANDLER(ich)
+ size_t n = P1(0); /* XXX use MAX */
+ if (n > s->ncol - c->c - 1) n = s->ncol - c->c - 1;
+
+ memmove(l->chars + c->c + n, l->chars + c->c,
+ MIN(s->ncol - 1 - c->c,
+ (s->ncol - c->c - n - 1)) * sizeof(TMTCHAR));
+ clearline(vt, l, c->c, n);
+}
+
+HANDLER(dch)
+ size_t n = P1(0); /* XXX use MAX */
+ if (n > s->ncol - c->c) n = s->ncol - c->c;
+
+ memmove(l->chars + c->c, l->chars + c->c + n,
+ (s->ncol - c->c - n) * sizeof(TMTCHAR));
+
+ clearline(vt, l, s->ncol - c->c - n, s->ncol);
+}
+
+HANDLER(el)
+ switch (P0(0)){
+ case 0: clearline(vt, l, c->c, vt->screen.ncol); break;
+ case 1: clearline(vt, l, 0, MIN(c->c + 1, s->ncol - 1)); break;
+ case 2: clearline(vt, l, 0, vt->screen.ncol); break;
+ }
+}
+
+HANDLER(sgr)
+ #define FGBG(c) *(P0(i) < 40? &vt->attrs.fg : &vt->attrs.bg) = c
+ for (size_t i = 0; i < vt->npar; i++) switch (P0(i)){
+ case 0: vt->attrs = defattrs; break;
+ case 1: case 22: vt->attrs.bold = P0(0) < 20; break;
+ case 2: case 23: vt->attrs.dim = P0(0) < 20; break;
+ case 4: case 24: vt->attrs.underline = P0(0) < 20; break;
+ case 5: case 25: vt->attrs.blink = P0(0) < 20; break;
+ case 7: case 27: vt->attrs.reverse = P0(0) < 20; break;
+ case 8: case 28: vt->attrs.invisible = P0(0) < 20; break;
+ case 10: case 11: vt->acs = P0(0) > 10; break;
+ case 30: case 40: FGBG(TMT_COLOR_BLACK); break;
+ case 31: case 41: FGBG(TMT_COLOR_RED); break;
+ case 32: case 42: FGBG(TMT_COLOR_GREEN); break;
+ case 33: case 43: FGBG(TMT_COLOR_YELLOW); break;
+ case 34: case 44: FGBG(TMT_COLOR_BLUE); break;
+ case 35: case 45: FGBG(TMT_COLOR_MAGENTA); break;
+ case 36: case 46: FGBG(TMT_COLOR_CYAN); break;
+ case 37: case 47: FGBG(TMT_COLOR_WHITE); break;
+ case 39: case 49: FGBG(TMT_COLOR_DEFAULT); break;
+ }
+}
+
+HANDLER(rep)
+ if (!c->c) return;
+ wchar_t r = l->chars[c->c - 1].c;
+ for (size_t i = 0; i < P1(0); i++)
+ writecharatcurs(vt, r);
+}
+
+HANDLER(dsr)
+ char r[BUF_MAX + 1] = {0};
+ snprintf(r, BUF_MAX, "\033[%zd;%zdR", c->r, c->c);
+ CB(vt, TMT_MSG_ANSWER, (const char *)r);
+}
+
+HANDLER(resetparser)
+ memset(vt->pars, 0, sizeof(vt->pars));
+ vt->state = vt->npar = vt->arg = vt->ignored = (bool)0;
+}
+
+HANDLER(consumearg)
+ if (vt->npar < PAR_MAX)
+ vt->pars[vt->npar++] = vt->arg;
+ vt->arg = 0;
+}
+
+HANDLER(fixcursor)
+ c->r = MIN(c->r, s->nline - 1);
+ c->c = MIN(c->c, s->ncol - 1);
+}
+
+static bool
+handlechar(TMT *vt, char i)
+{
+ COMMON_VARS;
+
+ char cs[] = {i, 0};
+ #define ON(S, C, A) if (vt->state == (S) && strchr(C, i)){ A; return true;}
+ #define DO(S, C, A) ON(S, C, consumearg(vt); if (!vt->ignored) {A;} \
+ fixcursor(vt); resetparser(vt););
+
+ DO(S_NUL, "\x07", CB(vt, TMT_MSG_BELL, NULL))
+ DO(S_NUL, "\x08", if (c->c) c->c--)
+ DO(S_NUL, "\x09", while (++c->c < s->ncol - 1 && t[c->c].c != L'*'))
+ DO(S_NUL, "\x0a", c->r < s->nline - 1? (void)c->r++ : scrup(vt, 0, 1))
+ DO(S_NUL, "\x0d", c->c = 0)
+ ON(S_NUL, "\x1b", vt->state = S_ESC)
+ ON(S_ESC, "\x1b", vt->state = S_ESC)
+ DO(S_ESC, "H", t[c->c].c = L'*')
+ DO(S_ESC, "7", vt->oldcurs = vt->curs; vt->oldattrs = vt->attrs)
+ DO(S_ESC, "8", vt->curs = vt->oldcurs; vt->attrs = vt->oldattrs)
+ ON(S_ESC, "+*()", vt->ignored = true; vt->state = S_ARG)
+ DO(S_ESC, "c", tmt_reset(vt))
+ ON(S_ESC, "[", vt->state = S_ARG)
+ ON(S_ARG, "\x1b", vt->state = S_ESC)
+ ON(S_ARG, ";", consumearg(vt))
+ ON(S_ARG, "?", (void)0)
+ ON(S_ARG, "0123456789", vt->arg = vt->arg * 10 + atoi(cs))
+ DO(S_ARG, "A", c->r = MAX(c->r - P1(0), 0))
+ DO(S_ARG, "B", c->r = MIN(c->r + P1(0), s->nline - 1))
+ DO(S_ARG, "C", c->c = MIN(c->c + P1(0), s->ncol - 1))
+ DO(S_ARG, "D", c->c = MIN(c->c - P1(0), c->c))
+ DO(S_ARG, "E", c->c = 0; c->r = MIN(c->r + P1(0), s->nline - 1))
+ DO(S_ARG, "F", c->c = 0; c->r = MAX(c->r - P1(0), 0))
+ DO(S_ARG, "G", c->c = MIN(P1(0) - 1, s->ncol - 1))
+ DO(S_ARG, "d", c->r = MIN(P1(0) - 1, s->nline - 1))
+ DO(S_ARG, "Hf", c->r = P1(0) - 1; c->c = P1(1) - 1)
+ DO(S_ARG, "I", while (++c->c < s->ncol - 1 && t[c->c].c != L'*'))
+ DO(S_ARG, "J", ed(vt))
+ DO(S_ARG, "K", el(vt))
+ DO(S_ARG, "L", scrdn(vt, c->r, P1(0)))
+ DO(S_ARG, "M", scrup(vt, c->r, P1(0)))
+ DO(S_ARG, "P", dch(vt))
+ DO(S_ARG, "S", scrup(vt, 0, P1(0)))
+ DO(S_ARG, "T", scrdn(vt, 0, P1(0)))
+ DO(S_ARG, "X", clearline(vt, l, c->c, P1(0)))
+ DO(S_ARG, "Z", while (c->c && t[--c->c].c != L'*'))
+ DO(S_ARG, "b", rep(vt));
+ DO(S_ARG, "c", CB(vt, TMT_MSG_ANSWER, "\033[?6c"))
+ DO(S_ARG, "g", if (P0(0) == 3) clearline(vt, vt->tabs, 0, s->ncol))
+ DO(S_ARG, "m", sgr(vt))
+ DO(S_ARG, "n", if (P0(0) == 6) dsr(vt))
+ DO(S_ARG, "h", if (P0(0) == 25) CB(vt, TMT_MSG_CURSOR, "t"))
+ DO(S_ARG, "i", (void)0)
+ DO(S_ARG, "l", if (P0(0) == 25) CB(vt, TMT_MSG_CURSOR, "f"))
+ DO(S_ARG, "s", vt->oldcurs = vt->curs; vt->oldattrs = vt->attrs)
+ DO(S_ARG, "u", vt->curs = vt->oldcurs; vt->attrs = vt->oldattrs)
+ DO(S_ARG, "@", ich(vt))
+
+ return resetparser(vt), false;
+}
+
+static void
+notify(TMT *vt, bool update, bool moved)
+{
+ if (update) CB(vt, TMT_MSG_UPDATE, &vt->screen);
+ if (moved) CB(vt, TMT_MSG_MOVED, &vt->curs);
+}
+
+static TMTLINE *
+allocline(TMT *vt, TMTLINE *o, size_t n, size_t pc)
+{
+ TMTLINE *l = realloc(o, sizeof(TMTLINE) + n * sizeof(TMTCHAR));
+ if (!l) return NULL;
+
+ clearline(vt, l, pc, n);
+ return l;
+}
+
+static void
+freelines(TMT *vt, size_t s, size_t n, bool screen)
+{
+ for (size_t i = s; vt->screen.lines && i < s + n; i++){
+ free(vt->screen.lines[i]);
+ vt->screen.lines[i] = NULL;
+ }
+ if (screen) free(vt->screen.lines);
+}
+
+TMT *
+tmt_open(size_t nline, size_t ncol, TMTCALLBACK cb, void *p,
+ const wchar_t *acs)
+{
+ TMT *vt = calloc(1, sizeof(TMT));
+ if (!nline || !ncol || !vt) return free(vt), NULL;
+
+ /* ASCII-safe defaults for box-drawing characters. */
+ vt->acschars = acs? acs : L"><^v#+:o##+++++~---_++++|<>*!fo";
+ vt->cb = cb;
+ vt->p = p;
+
+ if (!tmt_resize(vt, nline, ncol)) return tmt_close(vt), NULL;
+ return vt;
+}
+
+void
+tmt_close(TMT *vt)
+{
+ free(vt->tabs);
+ freelines(vt, 0, vt->screen.nline, true);
+ free(vt);
+}
+
+bool
+tmt_resize(TMT *vt, size_t nline, size_t ncol)
+{
+ if (nline < 2 || ncol < 2) return false;
+ if (nline < vt->screen.nline)
+ freelines(vt, nline, vt->screen.nline - nline, false);
+
+ TMTLINE **l = realloc(vt->screen.lines, nline * sizeof(TMTLINE *));
+ if (!l) return false;
+
+ size_t pc = vt->screen.ncol;
+ vt->screen.lines = l;
+ vt->screen.ncol = ncol;
+ for (size_t i = 0; i < nline; i++){
+ TMTLINE *nl = NULL;
+ if (i >= vt->screen.nline)
+ nl = vt->screen.lines[i] = allocline(vt, NULL, ncol, 0);
+ else
+ nl = allocline(vt, vt->screen.lines[i], ncol, pc);
+
+ if (!nl) return false;
+ vt->screen.lines[i] = nl;
+ }
+ vt->screen.nline = nline;
+
+ vt->tabs = allocline(vt, vt->tabs, ncol, 0);
+ if (!vt->tabs) return free(l), false;
+ vt->tabs->chars[0].c = vt->tabs->chars[ncol - 1].c = L'*';
+ for (size_t i = 0; i < ncol; i++) if (i % TAB == 0)
+ vt->tabs->chars[i].c = L'*';
+
+ fixcursor(vt);
+ dirtylines(vt, 0, nline);
+ notify(vt, true, true);
+ return true;
+}
+
+static void
+writecharatcurs(TMT *vt, wchar_t w)
+{
+ COMMON_VARS;
+
+ #ifdef TMT_HAS_WCWIDTH
+ extern int wcwidth(wchar_t c);
+ if (wcwidth(w) > 1) w = TMT_INVALID_CHAR;
+ if (wcwidth(w) < 0) return;
+ #endif
+
+ CLINE(vt)->chars[vt->curs.c].c = w;
+ CLINE(vt)->chars[vt->curs.c].a = vt->attrs;
+ CLINE(vt)->dirty = vt->dirty = true;
+
+ if (c->c < s->ncol - 1)
+ c->c++;
+ else{
+ c->c = 0;
+ c->r++;
+ }
+
+ if (c->r >= s->nline){
+ c->r = s->nline - 1;
+ scrup(vt, 0, 1);
+ }
+}
+
+static inline size_t
+testmbchar(TMT *vt)
+{
+ mbstate_t ts = vt->ms;
+ return vt->nmb? mbrtowc(NULL, vt->mb, vt->nmb, &ts) : (size_t)-2;
+}
+
+static inline wchar_t
+getmbchar(TMT *vt)
+{
+ wchar_t c = 0;
+ size_t n = mbrtowc(&c, vt->mb, vt->nmb, &vt->ms);
+ vt->nmb = 0;
+ return (n == (size_t)-1 || n == (size_t)-2)? TMT_INVALID_CHAR : c;
+}
+
+void
+tmt_write(TMT *vt, const char *s, size_t n)
+{
+ TMTPOINT oc = vt->curs;
+ n = n? n : strlen(s);
+
+ for (size_t p = 0; p < n; p++){
+ if (handlechar(vt, s[p]))
+ continue;
+ else if (vt->acs)
+ writecharatcurs(vt, tacs(vt, (unsigned char)s[p]));
+ else if (vt->nmb >= BUF_MAX)
+ writecharatcurs(vt, getmbchar(vt));
+ else{
+ switch (testmbchar(vt)){
+ case (size_t)-1: writecharatcurs(vt, getmbchar(vt)); break;
+ case (size_t)-2: vt->mb[vt->nmb++] = s[p]; break;
+ }
+
+ if (testmbchar(vt) <= MB_LEN_MAX)
+ writecharatcurs(vt, getmbchar(vt));
+ }
+ }
+
+ notify(vt, vt->dirty, memcmp(&oc, &vt->curs, sizeof(oc)) != 0);
+}
+
+const TMTSCREEN *
+tmt_screen(const TMT *vt)
+{
+ return &vt->screen;
+}
+
+const TMTPOINT *
+tmt_cursor(const TMT *vt)
+{
+ return &vt->curs;
+}
+
+void
+tmt_clean(TMT *vt)
+{
+ for (size_t i = 0; i < vt->screen.nline; i++)
+ vt->dirty = vt->screen.lines[i]->dirty = false;
+}
+
+void
+tmt_reset(TMT *vt)
+{
+ vt->curs.r = vt->curs.c = vt->oldcurs.r = vt->oldcurs.c = vt->acs = (bool)0;
+ resetparser(vt);
+ vt->attrs = vt->oldattrs = defattrs;
+ memset(&vt->ms, 0, sizeof(vt->ms));
+ clearlines(vt, 0, vt->screen.nline);
+ CB(vt, TMT_MSG_CURSOR, "t");
+ notify(vt, true, true);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-11 11:46:17 +0000