+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+#include <ctype.h>
+#include "console.h"
+#include "demo.h"
+#include "screen.h"
+
+static int runcmd(void);
+static int cmd_list(const char *args);
+static int cmd_help(const char *args);
+
+#define CBUF_SIZE 64
+#define CBUF_MASK (CBUF_SIZE - 1)
+
+#define HIST_SIZE 32
+#define SBUF_SIZE 4
+
+static char cbuf[CBUF_SIZE];
+static char inp[CBUF_SIZE + 1], *dptr;
+static int rd, wr;
+
+static char hist[HIST_SIZE][CBUF_SIZE + 1];
+static int hist_head, hist_tail;
+
+static char sbuf[SBUF_SIZE][CBUF_SIZE + 1];
+static int sbuf_head, sbuf_tail;
+static int sbuf_size;
+
+
+int con_init(void)
+{
+ wr = rd = 0;
+ hist_head = hist_tail = 0;
+ sbuf_head = sbuf_tail = 0;
+ sbuf_size = 0;
+ return 0;
+}
+
+void con_start(void)
+{
+ wr = rd = 0;
+}
+
+void con_stop(void)
+{
+}
+
+void con_draw(uint16_t *fb)
+{
+ int x, y, sidx, cidx;
+
+ /* print output buffer */
+ y = 1;
+ sidx = sbuf_head;
+ while(sidx != sbuf_tail) {
+ cs_cputs(fb, 1, y, sbuf[sidx]);
+ sidx = (sidx + 1) & (SBUF_SIZE - 1);
+ y += 8;
+ }
+
+ memset(fb + y++ * 320, 0xff, 640);
+
+ cs_confont(fb, 1, y, '>' - 32);
+ cidx = rd;
+ x = 10;
+ while(cidx != wr) {
+ cs_confont(fb, x, y, cbuf[cidx] - 32);
+ x += 6;
+ cidx = (cidx + 1) & CBUF_MASK;
+ }
+ memset(fb + (y + 8) * 320, 0xff, 640);
+}
+
+int con_input(int key)
+{
+ switch(key) {
+ case '\b':
+ if(wr != rd) {
+ wr = (wr + CBUF_SIZE - 1) & CBUF_MASK;
+ }
+ break;
+
+ case '\n':
+ case '\r':
+ dptr = inp;
+ while(rd != wr) {
+ *dptr++ = cbuf[rd];
+ rd = (rd + 1) & CBUF_MASK;
+ }
+ *dptr = 0;
+ if(inp[0]) {
+ /* add to history */
+ memcpy(hist[hist_tail], inp, dptr - inp + 1);
+ hist_tail = (hist_tail + 1) & (HIST_SIZE - 1);
+ if(hist_tail == hist_head) { /* ovf */
+ hist_head = (hist_head + 1) & (HIST_SIZE - 1);
+ }
+
+ return runcmd();
+ }
+ break;
+
+ case KB_UP:
+ if(hist_head == hist_tail) break;
+ hist_tail = (hist_tail + HIST_SIZE - 1) & (HIST_SIZE - 1);
+ strcpy(inp, hist[hist_tail]);
+ break;
+
+ default:
+ if(key < 256 && isprint(key)) {
+ cbuf[wr] = key;
+ wr = (wr + 1) & CBUF_MASK;
+ if(wr == rd) { /* overflow */
+ rd = (rd + 1) & CBUF_MASK;
+ }
+ }
+ break;
+ }
+
+ return 1;
+}
+
+void con_printf(const char *fmt, ...)
+{
+ int len;
+ va_list ap;
+
+ va_start(ap, fmt);
+ len = vsprintf(sbuf[sbuf_tail], fmt, ap);
+ sbuf[sbuf_tail][len] = 0;
+ va_end(ap);
+
+ sbuf_tail = (sbuf_tail + 1) & (SBUF_SIZE - 1);
+ if(sbuf_tail == sbuf_head) { /* ovf */
+ sbuf_head = (sbuf_head + 1) & (SBUF_SIZE - 1);
+ }
+
+ if(sbuf_size < SBUF_SIZE) sbuf_size++;
+}
+
+static struct {
+ const char *name;
+ int (*func)(const char*);
+} cmd[] = {
+ {"ls", cmd_list},
+ {"help", cmd_help},
+ {"?", cmd_help},
+ {0, 0}
+};
+
+static int runcmd(void)
+{
+ int i, nscr;
+ char *endp, *args;
+
+ switch(inp[0]) {
+ case '/':
+ nscr = scr_num_screens();
+ for(i=0; i<nscr; i++) {
+ if(strstr(scr_screen(i)->name, inp + 1)) {
+ change_screen(i);
+ return 0;
+ }
+ }
+ con_printf("no such screen: %s\n", inp + 1);
+ break;
+
+ case '#':
+ i = strtol(inp + 1, &endp, 10);
+ if(endp == inp + 1) {
+ con_printf("usage: #<screen number>\n");
+ break;
+ }
+ nscr = scr_num_screens();
+ if(i < 0 || i >= nscr) {
+ con_printf("no such screen: %d\n", i);
+ break;
+ }
+ change_screen(i);
+ return 0;
+
+ default:
+ endp = inp;
+ while(*endp && isspace(*endp)) endp++;
+ while(*endp && !isspace(*endp)) endp++;
+
+ args = *endp ? endp + 1 : 0;
+ *endp = 0;
+
+ for(i=0; cmd[i].name; i++) {
+ if(strcmp(inp, cmd[i].name) == 0) {
+ cmd[i].func(args);
+ return 1;
+ }
+ }
+
+ con_printf("?%s\n", inp);
+ }
+
+ return 1;
+}
+
+static int cmd_list(const char *args)
+{
+ int i, nscr, len;
+ char buf[512], *ptr = buf;
+
+ nscr = scr_num_screens();
+ for(i=0; i<nscr; i++) {
+ char *sname = scr_screen(i)->name;
+ len = strlen(sname);
+
+ if(ptr - buf + len > 53) {
+ *ptr = 0;
+ con_printf("%s", buf);
+ ptr = buf;
+ }
+
+ len = sprintf(ptr, "%s ", sname);
+ ptr += len;
+ }
+ if(ptr > buf) {
+ *ptr = 0;
+ con_printf("%s", buf);
+ }
+ return 0;
+}
+
+static int cmd_help(const char *args)
+{
+ con_printf("cmds: /, #, ls, help, ?\n");
+ return 0;
+}
projects / dosdemo / commitdiff