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 } 135 136 void xmon_puts(const char *str) 137 { 138 xmon_write(str, strlen(str)); 139 } 140