]>
Commit | Line | Data |
---|---|---|
fca5dcd4 PM |
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> | |
33b5cd68 | 10 | #include <asm/udbg.h> |
fca5dcd4 PM |
11 | #include <asm/time.h> |
12 | #include "nonstdio.h" | |
13 | ||
958b7c80 S |
14 | static bool paginating, paginate_skipping; |
15 | static unsigned long paginate_lpp; /* Lines Per Page */ | |
16 | static unsigned long paginate_pos; | |
33b5cd68 | 17 | |
958b7c80 | 18 | void xmon_start_pagination(void) |
33b5cd68 | 19 | { |
958b7c80 S |
20 | paginating = true; |
21 | paginate_skipping = false; | |
22 | paginate_pos = 0; | |
23 | } | |
24 | ||
25 | void xmon_end_pagination(void) | |
26 | { | |
27 | paginating = false; | |
28 | } | |
29 | ||
30 | void xmon_set_pagination_lpp(unsigned long lpp) | |
31 | { | |
32 | paginate_lpp = lpp; | |
33b5cd68 ME |
33 | } |
34 | ||
35 | static int xmon_readchar(void) | |
36 | { | |
37 | if (udbg_getc) | |
38 | return udbg_getc(); | |
39 | return -1; | |
40 | } | |
41 | ||
958b7c80 S |
42 | static int xmon_write(const char *ptr, int nb) |
43 | { | |
44 | int rv = 0; | |
45 | const char *p = ptr, *q; | |
46 | const char msg[] = "[Hit a key (a:all, q:truncate, any:next page)]"; | |
47 | ||
48 | if (nb <= 0) | |
49 | return rv; | |
50 | ||
51 | if (paginating && paginate_skipping) | |
52 | return nb; | |
53 | ||
54 | if (paginate_lpp) { | |
55 | while (paginating && (q = strchr(p, '\n'))) { | |
56 | rv += udbg_write(p, q - p + 1); | |
57 | p = q + 1; | |
58 | paginate_pos++; | |
59 | ||
60 | if (paginate_pos >= paginate_lpp) { | |
61 | udbg_write(msg, strlen(msg)); | |
62 | ||
63 | switch (xmon_readchar()) { | |
64 | case 'a': | |
65 | paginating = false; | |
66 | break; | |
67 | case 'q': | |
68 | paginate_skipping = true; | |
69 | break; | |
70 | default: | |
71 | /* nothing */ | |
72 | break; | |
73 | } | |
74 | ||
75 | paginate_pos = 0; | |
76 | udbg_write("\r\n", 2); | |
77 | ||
78 | if (paginate_skipping) | |
79 | return nb; | |
80 | } | |
81 | } | |
82 | } | |
83 | ||
84 | return rv + udbg_write(p, nb - (p - ptr)); | |
85 | } | |
86 | ||
fca5dcd4 PM |
87 | int xmon_putchar(int c) |
88 | { | |
89 | char ch = c; | |
90 | ||
91 | if (c == '\n') | |
92 | xmon_putchar('\r'); | |
93 | return xmon_write(&ch, 1) == 1? c: -1; | |
94 | } | |
95 | ||
96 | static char line[256]; | |
97 | static char *lineptr; | |
98 | static int lineleft; | |
99 | ||
88c6d626 | 100 | static int xmon_getchar(void) |
fca5dcd4 PM |
101 | { |
102 | int c; | |
103 | ||
104 | if (lineleft == 0) { | |
105 | lineptr = line; | |
106 | for (;;) { | |
107 | c = xmon_readchar(); | |
108 | if (c == -1 || c == 4) | |
109 | break; | |
110 | if (c == '\r' || c == '\n') { | |
111 | *lineptr++ = '\n'; | |
112 | xmon_putchar('\n'); | |
113 | break; | |
114 | } | |
115 | switch (c) { | |
116 | case 0177: | |
117 | case '\b': | |
118 | if (lineptr > line) { | |
119 | xmon_putchar('\b'); | |
120 | xmon_putchar(' '); | |
121 | xmon_putchar('\b'); | |
122 | --lineptr; | |
123 | } | |
124 | break; | |
125 | case 'U' & 0x1F: | |
126 | while (lineptr > line) { | |
127 | xmon_putchar('\b'); | |
128 | xmon_putchar(' '); | |
129 | xmon_putchar('\b'); | |
130 | --lineptr; | |
131 | } | |
132 | break; | |
133 | default: | |
134 | if (lineptr >= &line[sizeof(line) - 1]) | |
135 | xmon_putchar('\a'); | |
136 | else { | |
137 | xmon_putchar(c); | |
138 | *lineptr++ = c; | |
139 | } | |
140 | } | |
141 | } | |
142 | lineleft = lineptr - line; | |
143 | lineptr = line; | |
144 | } | |
145 | if (lineleft == 0) | |
146 | return -1; | |
147 | --lineleft; | |
148 | return *lineptr++; | |
149 | } | |
150 | ||
151 | char *xmon_gets(char *str, int nb) | |
152 | { | |
153 | char *p; | |
154 | int c; | |
155 | ||
156 | for (p = str; p < str + nb - 1; ) { | |
157 | c = xmon_getchar(); | |
158 | if (c == -1) { | |
159 | if (p == str) | |
160 | return NULL; | |
161 | break; | |
162 | } | |
163 | *p++ = c; | |
164 | if (c == '\n') | |
165 | break; | |
166 | } | |
167 | *p = 0; | |
168 | return str; | |
169 | } | |
170 | ||
171 | void xmon_printf(const char *format, ...) | |
172 | { | |
173 | va_list args; | |
fca5dcd4 | 174 | static char xmon_outbuf[1024]; |
b2bb65f6 | 175 | int rc, n; |
fca5dcd4 PM |
176 | |
177 | va_start(args, format); | |
178 | n = vsnprintf(xmon_outbuf, sizeof(xmon_outbuf), format, args); | |
179 | va_end(args); | |
b2bb65f6 ME |
180 | |
181 | rc = xmon_write(xmon_outbuf, n); | |
182 | ||
183 | if (n && rc == 0) { | |
184 | /* No udbg hooks, fallback to printk() - dangerous */ | |
50b66dbf | 185 | printk("%s", xmon_outbuf); |
b2bb65f6 | 186 | } |
fca5dcd4 | 187 | } |
4d404edc IK |
188 | |
189 | void xmon_puts(const char *str) | |
190 | { | |
191 | xmon_write(str, strlen(str)); | |
192 | } |