#ifndef GENERAL_H_
#define GENERAL_H_
typedef unsigned char BYTE;
+typedef enum {
+ INPUT_TERMINATOR_RETURN = (1 << 0),
+ INPUT_TERMINATOR_SPACE = (1 << 1),
+} input_terminator_t;
+typedef input_terminator_t input_terminator_mask_t;
+input_terminator_t get_input_terminated_by(input_terminator_mask_t terminators, char *out, BYTE outlen);
char *get_input(void);
char retry_or_quit(void);
char *format_euro(char * s, int maxlen, int cent);
#define TC_LIGHT_BLUE 14
#define TC_LIGHT_GRAY 15
+/* Carriage return */
+#define PETSCII_CR 13
+/* Delete */
+#define PETSCII_DEL 20
+/* Space */
+#define PETSCII_SP 32
+#define PETSCII_0 48
+#define PETSCII_1 49
+#define PETSCII_2 50
+#define PETSCII_3 51
+#define PETSCII_4 52
+#define PETSCII_5 53
+#define PETSCII_6 54
+#define PETSCII_7 55
+#define PETSCII_8 56
+#define PETSCII_9 57
+
#define VIDEOMODE (((* (BYTE *)0xD7) == 0x80) ? 80 : 40)
/* because there is no macro expansion when stringifying, we need to use two
#include "general.h"
/*
- * Liest (maximal 31) Zeichen ein, bis Enter gedrückt wird.
- * Vorsicht: Es wird ein statischer Buffer benutzt, sodass man
- * das Ergebnis via strdup() retten muss, bevor man get_input()
- * erneut aufruft
+ * get_input_terminated_by() reads input (handling backspace correctly) until
+ * a terminator of |terminators| is encountered or |out| is full (outlen-1
+ * characters were read).
+ *
+ * get_input_terminated_by() returns the terminator it encountered.
*
*/
-char *get_input(void) {
- BYTE i = 0;
+input_terminator_t get_input_terminated_by(input_terminator_mask_t terminators, char *out, BYTE outlen) {
+ BYTE i = strlen(out);
BYTE c, x, y;
- static char output[32];
- x = wherex();
+ x = wherex() - i;
y = wherey();
- memset(output, '\0', 32);
while (1) {
- if (i == 31)
- break;
c = cgetc();
- if (c == 13)
- break;
- /* backspace? */
- if (c == 20) {
+ if (((terminators & INPUT_TERMINATOR_RETURN) == INPUT_TERMINATOR_RETURN) && (c == PETSCII_CR)) {
+ return INPUT_TERMINATOR_RETURN;
+ } else if (((terminators & INPUT_TERMINATOR_SPACE) == INPUT_TERMINATOR_SPACE) && (c == PETSCII_SP)) {
+ return INPUT_TERMINATOR_SPACE;
+ } else if (c == PETSCII_DEL) {
/* If you are at the left-most position, do nothing */
if (i == 0)
continue;
- output[--i] = '\0';
+ out[--i] = '\0';
cputcxy(x+i, y, ' ');
gotoxy(x+i, y);
continue;
}
+ if (i == (outlen-1)) {
+ continue;
+ }
cputc(c);
- output[i++] = c;
+ out[i++] = c;
}
+}
+
+/*
+ * Liest (maximal 31) Zeichen ein, bis Enter gedrückt wird.
+ * Vorsicht: Es wird ein statischer Buffer benutzt, sodass man
+ * das Ergebnis via strdup() retten muss, bevor man get_input()
+ * erneut aufruft
+ *
+ */
+char *get_input(void) {
+ static char output[32];
+ memset(output, '\0', sizeof(output));
+ get_input_terminated_by(INPUT_TERMINATOR_RETURN, output, sizeof(output));
return output;
}
BYTE c, x, y, nickname_len;
int einheiten;
char *input;
- char nickname[11];
+ char nickname[NICKNAME_MAX_LEN+1];
char rest[11];
struct credits_t *credit;
+ memset(nickname, '\0', sizeof(nickname));
memset(rest, ' ', sizeof(rest));
rest[8] = '\0';
c = cgetc();
/* Enter */
- if (c == 13)
+ if (c == PETSCII_CR)
break;
/* Backspace */
- if (c == 20) {
+ if (c == PETSCII_DEL) {
if (i == 0)
continue;
entered[--i] = '\0';
if (c == '-' && i == 0) {
negative = -1;
cputc(c);
- } else if (c > 47 && c < 58) {
+ } else if (c >= PETSCII_0 && c <= PETSCII_9) {
entered[i++] = c;
cputc(c);
}
cprintf("\r\n *** VERKAUF ***\r\n\r\n");
cprintf("%dx %s", einheiten, name);
toggle_videomode();
-
+
cprintf("\r\nAuf ein Guthaben kaufen? Wenn ja, Nickname eingeben:\r\n");
- input = get_input();
- strncpy(nickname, input, 11);
+ {
+ BYTE i;
+ BYTE x;
+ BYTE y;
+ BYTE matches;
+ char *uniquematch;
+ input_terminator_t terminator;
+ while (1) {
+ terminator = get_input_terminated_by(
+ INPUT_TERMINATOR_RETURN |
+ INPUT_TERMINATOR_SPACE,
+ nickname,
+ sizeof(nickname));
+
+ /* Clear the screen from any previous completions */
+ x = wherex();
+ y = wherey();
+ for (i = 1; i < 7; i++) {
+ /* "Completion:" is longer than NICKNAME_MAX_LEN */
+ cclearxy(0, y + i, strlen("Completion:"));
+ }
+ gotoxy(x, y);
+
+ if (terminator != INPUT_TERMINATOR_SPACE) {
+ break;
+ }
+
+ matches = 0;
+ uniquematch = NULL;
+ for (i = 0; i < credits.num_items; i++) {
+ if (strncmp(nickname, credits.credits[i].nickname, strlen(nickname)) != 0) {
+ continue;
+ }
+ matches++;
+ if (matches > 1) {
+ break;
+ }
+ uniquematch = credits.credits[i].nickname;
+ }
+ if (matches == 1) {
+ /* Display the rest of the nickname */
+ textcolor(TC_LIGHT_GREEN);
+ cprintf("%s", uniquematch + strlen(nickname));
+ textcolor(TC_LIGHT_GRAY);
+ strcat(nickname, uniquematch + strlen(nickname));
+ } else {
+ /* Multiple nicknames match what was entered so far. Abort and
+ * display all matches, then prompt the user again. */
+ char completion[NICKNAME_MAX_LEN+1];
+ BYTE len = strlen(nickname);
+ x = wherex();
+ y = wherey();
+ cprintf("\r\nCompletion:\r\n");
+ matches = 0;
+ for (i = 0; i < credits.num_items; i++) {
+ if (strncmp(nickname, credits.credits[i].nickname, len) != 0) {
+ continue;
+ }
+ if (++matches == 5) {
+ cprintf("...\r\n");
+ break;
+ }
+ strcpy(completion, credits.credits[i].nickname);
+ *(completion + len) = '\0';
+ cprintf("%s", completion);
+ textcolor(TC_LIGHT_GREEN);
+ cprintf("%c", *(credits.credits[i].nickname + len));
+ textcolor(TC_LIGHT_GRAY);
+ cprintf("%s\r\n", completion + len + 1);
+ }
+ gotoxy(x, y);
+ }
+ }
+ }
if (*nickname != '\0') {
toggle_videomode();
cprintf(" fuer %s\r\n", nickname);
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