1*8ccd4a63SDavid du Colombier #include <u.h>
2*8ccd4a63SDavid du Colombier #include <libc.h>
3*8ccd4a63SDavid du Colombier #include "drawterm.h"
4*8ccd4a63SDavid du Colombier
5*8ccd4a63SDavid du Colombier void*
erealloc(void * v,ulong n)6*8ccd4a63SDavid du Colombier erealloc(void *v, ulong n)
7*8ccd4a63SDavid du Colombier {
8*8ccd4a63SDavid du Colombier v = realloc(v, n);
9*8ccd4a63SDavid du Colombier if(v == nil)
10*8ccd4a63SDavid du Colombier sysfatal("out of memory");
11*8ccd4a63SDavid du Colombier return v;
12*8ccd4a63SDavid du Colombier }
13*8ccd4a63SDavid du Colombier
14*8ccd4a63SDavid du Colombier char*
estrdup(char * s)15*8ccd4a63SDavid du Colombier estrdup(char *s)
16*8ccd4a63SDavid du Colombier {
17*8ccd4a63SDavid du Colombier s = strdup(s);
18*8ccd4a63SDavid du Colombier if(s == nil)
19*8ccd4a63SDavid du Colombier sysfatal("out of memory");
20*8ccd4a63SDavid du Colombier return s;
21*8ccd4a63SDavid du Colombier }
22*8ccd4a63SDavid du Colombier
23*8ccd4a63SDavid du Colombier char*
estrappend(char * s,char * fmt,...)24*8ccd4a63SDavid du Colombier estrappend(char *s, char *fmt, ...)
25*8ccd4a63SDavid du Colombier {
26*8ccd4a63SDavid du Colombier char *t;
27*8ccd4a63SDavid du Colombier va_list arg;
28*8ccd4a63SDavid du Colombier
29*8ccd4a63SDavid du Colombier va_start(arg, fmt);
30*8ccd4a63SDavid du Colombier t = vsmprint(fmt, arg);
31*8ccd4a63SDavid du Colombier if(t == nil)
32*8ccd4a63SDavid du Colombier sysfatal("out of memory");
33*8ccd4a63SDavid du Colombier va_end(arg);
34*8ccd4a63SDavid du Colombier s = erealloc(s, strlen(s)+strlen(t)+1);
35*8ccd4a63SDavid du Colombier strcat(s, t);
36*8ccd4a63SDavid du Colombier free(t);
37*8ccd4a63SDavid du Colombier return s;
38*8ccd4a63SDavid du Colombier }
39*8ccd4a63SDavid du Colombier
40*8ccd4a63SDavid du Colombier /*
41*8ccd4a63SDavid du Colombier * prompt for a string with a possible default response
42*8ccd4a63SDavid du Colombier */
43*8ccd4a63SDavid du Colombier char*
readcons(char * prompt,char * def,int raw)44*8ccd4a63SDavid du Colombier readcons(char *prompt, char *def, int raw)
45*8ccd4a63SDavid du Colombier {
46*8ccd4a63SDavid du Colombier int fdin, fdout, ctl, n;
47*8ccd4a63SDavid du Colombier char line[10];
48*8ccd4a63SDavid du Colombier char *s;
49*8ccd4a63SDavid du Colombier
50*8ccd4a63SDavid du Colombier fdin = open("/dev/cons", OREAD);
51*8ccd4a63SDavid du Colombier if(fdin < 0)
52*8ccd4a63SDavid du Colombier fdin = 0;
53*8ccd4a63SDavid du Colombier fdout = open("/dev/cons", OWRITE);
54*8ccd4a63SDavid du Colombier if(fdout < 0)
55*8ccd4a63SDavid du Colombier fdout = 1;
56*8ccd4a63SDavid du Colombier if(def != nil)
57*8ccd4a63SDavid du Colombier fprint(fdout, "%s[%s]: ", prompt, def);
58*8ccd4a63SDavid du Colombier else
59*8ccd4a63SDavid du Colombier fprint(fdout, "%s: ", prompt);
60*8ccd4a63SDavid du Colombier if(raw){
61*8ccd4a63SDavid du Colombier ctl = open("/dev/consctl", OWRITE);
62*8ccd4a63SDavid du Colombier if(ctl >= 0)
63*8ccd4a63SDavid du Colombier write(ctl, "rawon", 5);
64*8ccd4a63SDavid du Colombier } else
65*8ccd4a63SDavid du Colombier ctl = -1;
66*8ccd4a63SDavid du Colombier s = estrdup("");
67*8ccd4a63SDavid du Colombier for(;;){
68*8ccd4a63SDavid du Colombier n = read(fdin, line, 1);
69*8ccd4a63SDavid du Colombier if(n == 0){
70*8ccd4a63SDavid du Colombier Error:
71*8ccd4a63SDavid du Colombier close(fdin);
72*8ccd4a63SDavid du Colombier close(fdout);
73*8ccd4a63SDavid du Colombier if(ctl >= 0)
74*8ccd4a63SDavid du Colombier close(ctl);
75*8ccd4a63SDavid du Colombier free(s);
76*8ccd4a63SDavid du Colombier return nil;
77*8ccd4a63SDavid du Colombier }
78*8ccd4a63SDavid du Colombier if(n < 0)
79*8ccd4a63SDavid du Colombier goto Error;
80*8ccd4a63SDavid du Colombier if(line[0] == 0x7f)
81*8ccd4a63SDavid du Colombier goto Error;
82*8ccd4a63SDavid du Colombier if(n == 0 || line[0] == '\n' || line[0] == '\r'){
83*8ccd4a63SDavid du Colombier if(raw){
84*8ccd4a63SDavid du Colombier write(ctl, "rawoff", 6);
85*8ccd4a63SDavid du Colombier write(fdout, "\n", 1);
86*8ccd4a63SDavid du Colombier }
87*8ccd4a63SDavid du Colombier close(ctl);
88*8ccd4a63SDavid du Colombier close(fdin);
89*8ccd4a63SDavid du Colombier close(fdout);
90*8ccd4a63SDavid du Colombier if(*s == 0 && def != nil)
91*8ccd4a63SDavid du Colombier s = estrappend(s, "%s", def);
92*8ccd4a63SDavid du Colombier return s;
93*8ccd4a63SDavid du Colombier }
94*8ccd4a63SDavid du Colombier if(line[0] == '\b'){
95*8ccd4a63SDavid du Colombier if(strlen(s) > 0)
96*8ccd4a63SDavid du Colombier s[strlen(s)-1] = 0;
97*8ccd4a63SDavid du Colombier } else if(line[0] == 0x15) { /* ^U: line kill */
98*8ccd4a63SDavid du Colombier if(def != nil)
99*8ccd4a63SDavid du Colombier fprint(fdout, "\n%s[%s]: ", prompt, def);
100*8ccd4a63SDavid du Colombier else
101*8ccd4a63SDavid du Colombier fprint(fdout, "\n%s: ", prompt);
102*8ccd4a63SDavid du Colombier
103*8ccd4a63SDavid du Colombier s[0] = 0;
104*8ccd4a63SDavid du Colombier } else {
105*8ccd4a63SDavid du Colombier s = estrappend(s, "%c", line[0]);
106*8ccd4a63SDavid du Colombier }
107*8ccd4a63SDavid du Colombier }
108*8ccd4a63SDavid du Colombier return nil; /* not reached */
109*8ccd4a63SDavid du Colombier }
110*8ccd4a63SDavid du Colombier
111