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1 | /* |
2 | * Copyright (C) 1996-2005 Paul Mackerras. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; either version | |
7 | * 2 of the License, or (at your option) any later version. | |
8 | */ | |
9 | #include <linux/string.h> | |
10 | #include <asm/time.h> | |
11 | #include "nonstdio.h" | |
12 | ||
13 | int xmon_putchar(int c) | |
14 | { | |
15 | char ch = c; | |
16 | ||
17 | if (c == '\n') | |
18 | xmon_putchar('\r'); | |
19 | return xmon_write(&ch, 1) == 1? c: -1; | |
20 | } | |
21 | ||
22 | static char line[256]; | |
23 | static char *lineptr; | |
24 | static int lineleft; | |
25 | ||
26 | int xmon_expect(const char *str, unsigned long timeout) | |
27 | { | |
28 | int c; | |
29 | unsigned long t0; | |
30 | ||
31 | /* assume 25MHz default timebase if tb_ticks_per_sec not set yet */ | |
32 | timeout *= tb_ticks_per_sec? tb_ticks_per_sec: 25000000; | |
33 | t0 = get_tbl(); | |
34 | do { | |
35 | lineptr = line; | |
36 | for (;;) { | |
37 | c = xmon_read_poll(); | |
38 | if (c == -1) { | |
39 | if (get_tbl() - t0 > timeout) | |
40 | return 0; | |
41 | continue; | |
42 | } | |
43 | if (c == '\n') | |
44 | break; | |
45 | if (c != '\r' && lineptr < &line[sizeof(line) - 1]) | |
46 | *lineptr++ = c; | |
47 | } | |
48 | *lineptr = 0; | |
49 | } while (strstr(line, str) == NULL); | |
50 | return 1; | |
51 | } | |
52 | ||
53 | int xmon_getchar(void) | |
54 | { | |
55 | int c; | |
56 | ||
57 | if (lineleft == 0) { | |
58 | lineptr = line; | |
59 | for (;;) { | |
60 | c = xmon_readchar(); | |
61 | if (c == -1 || c == 4) | |
62 | break; | |
63 | if (c == '\r' || c == '\n') { | |
64 | *lineptr++ = '\n'; | |
65 | xmon_putchar('\n'); | |
66 | break; | |
67 | } | |
68 | switch (c) { | |
69 | case 0177: | |
70 | case '\b': | |
71 | if (lineptr > line) { | |
72 | xmon_putchar('\b'); | |
73 | xmon_putchar(' '); | |
74 | xmon_putchar('\b'); | |
75 | --lineptr; | |
76 | } | |
77 | break; | |
78 | case 'U' & 0x1F: | |
79 | while (lineptr > line) { | |
80 | xmon_putchar('\b'); | |
81 | xmon_putchar(' '); | |
82 | xmon_putchar('\b'); | |
83 | --lineptr; | |
84 | } | |
85 | break; | |
86 | default: | |
87 | if (lineptr >= &line[sizeof(line) - 1]) | |
88 | xmon_putchar('\a'); | |
89 | else { | |
90 | xmon_putchar(c); | |
91 | *lineptr++ = c; | |
92 | } | |
93 | } | |
94 | } | |
95 | lineleft = lineptr - line; | |
96 | lineptr = line; | |
97 | } | |
98 | if (lineleft == 0) | |
99 | return -1; | |
100 | --lineleft; | |
101 | return *lineptr++; | |
102 | } | |
103 | ||
104 | char *xmon_gets(char *str, int nb) | |
105 | { | |
106 | char *p; | |
107 | int c; | |
108 | ||
109 | for (p = str; p < str + nb - 1; ) { | |
110 | c = xmon_getchar(); | |
111 | if (c == -1) { | |
112 | if (p == str) | |
113 | return NULL; | |
114 | break; | |
115 | } | |
116 | *p++ = c; | |
117 | if (c == '\n') | |
118 | break; | |
119 | } | |
120 | *p = 0; | |
121 | return str; | |
122 | } | |
123 | ||
124 | void xmon_printf(const char *format, ...) | |
125 | { | |
126 | va_list args; | |
127 | int n; | |
128 | static char xmon_outbuf[1024]; | |
129 | ||
130 | va_start(args, format); | |
131 | n = vsnprintf(xmon_outbuf, sizeof(xmon_outbuf), format, args); | |
132 | va_end(args); | |
133 | xmon_write(xmon_outbuf, n); | |
134 | } |