[9083] | 1 | /* |
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| 2 | * Top users/processes display for Unix |
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| 3 | * Version 3 |
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| 4 | * |
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| 5 | * This program may be freely redistributed, |
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| 6 | * but this entire comment MUST remain intact. |
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| 7 | * |
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| 8 | * Copyright (c) 1984, 1989, William LeFebvre, Rice University |
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| 9 | * Copyright (c) 1989, 1990, 1992, William LeFebvre, Northwestern University |
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| 10 | */ |
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| 11 | |
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| 12 | /* |
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| 13 | * This file contains the routines that display information on the screen. |
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| 14 | * Each section of the screen has two routines: one for initially writing |
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| 15 | * all constant and dynamic text, and one for only updating the text that |
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| 16 | * changes. The prefix "i_" is used on all the "initial" routines and the |
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| 17 | * prefix "u_" is used for all the "updating" routines. |
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| 18 | * |
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| 19 | * ASSUMPTIONS: |
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| 20 | * None of the "i_" routines use any of the termcap capabilities. |
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| 21 | * In this way, those routines can be safely used on terminals that |
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| 22 | * have minimal (or nonexistant) terminal capabilities. |
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| 23 | * |
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| 24 | * The routines are called in this order: *_loadave, i_timeofday, |
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| 25 | * *_procstates, *_cpustates, *_memory, *_message, *_header, |
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| 26 | * *_process, u_endscreen. |
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| 27 | */ |
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| 28 | |
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| 29 | #include "os.h" |
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| 30 | #include <ctype.h> |
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| 31 | #include <time.h> |
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| 32 | |
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| 33 | #include "screen.h" /* interface to screen package */ |
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| 34 | #include "layout.h" /* defines for screen position layout */ |
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| 35 | #include "display.h" |
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| 36 | #include "top.h" |
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| 37 | #include "top.local.h" |
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| 38 | #include "boolean.h" |
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| 39 | #include "machine.h" /* we should eliminate this!!! */ |
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| 40 | #include "utils.h" |
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| 41 | |
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| 42 | #ifdef DEBUG |
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| 43 | FILE *debug; |
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| 44 | #endif |
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| 45 | |
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| 46 | /* imported from screen.c */ |
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| 47 | extern int overstrike; |
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| 48 | |
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| 49 | static int lmpid = 0; |
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| 50 | static int last_hi = 0; /* used in u_process and u_endscreen */ |
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| 51 | static int lastline = 0; |
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| 52 | static int display_width = MAX_COLS; |
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| 53 | |
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| 54 | #define lineindex(l) ((l)*display_width) |
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| 55 | |
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| 56 | char *printable(); |
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| 57 | |
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| 58 | /* things initialized by display_init and used thruout */ |
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| 59 | |
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| 60 | /* buffer of proc information lines for display updating */ |
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| 61 | char *screenbuf = NULL; |
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| 62 | |
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| 63 | static char **procstate_names; |
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| 64 | static char **cpustate_names; |
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| 65 | static char **memory_names; |
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| 66 | |
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| 67 | static int num_procstates; |
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| 68 | static int num_cpustates; |
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| 69 | static int num_memory; |
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| 70 | |
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| 71 | static int *lprocstates; |
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| 72 | static int *lcpustates; |
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| 73 | static int *lmemory; |
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| 74 | |
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| 75 | static int *cpustate_columns; |
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| 76 | static int cpustate_total_length; |
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| 77 | |
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| 78 | static enum { OFF, ON, ERASE } header_status = ON; |
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| 79 | |
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| 80 | static int string_count(); |
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| 81 | static void summary_format(); |
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| 82 | static void line_update(); |
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| 83 | |
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| 84 | int display_resize() |
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| 85 | |
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| 86 | { |
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| 87 | register int lines; |
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| 88 | |
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| 89 | /* first, deallocate any previous buffer that may have been there */ |
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| 90 | if (screenbuf != NULL) |
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| 91 | { |
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| 92 | free(screenbuf); |
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| 93 | } |
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| 94 | |
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| 95 | /* calculate the current dimensions */ |
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| 96 | /* if operating in "dumb" mode, we only need one line */ |
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| 97 | lines = smart_terminal ? screen_length - Header_lines : 1; |
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| 98 | |
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| 99 | /* we don't want more than MAX_COLS columns, since the machine-dependent |
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| 100 | modules make static allocations based on MAX_COLS and we don't want |
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| 101 | to run off the end of their buffers */ |
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| 102 | display_width = screen_width; |
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| 103 | if (display_width >= MAX_COLS) |
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| 104 | { |
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| 105 | display_width = MAX_COLS - 1; |
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| 106 | } |
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| 107 | |
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| 108 | /* now, allocate space for the screen buffer */ |
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| 109 | screenbuf = (char *)malloc(lines * display_width); |
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| 110 | if (screenbuf == (char *)NULL) |
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| 111 | { |
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| 112 | /* oops! */ |
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| 113 | return(-1); |
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| 114 | } |
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| 115 | |
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| 116 | /* return number of lines available */ |
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| 117 | /* for dumb terminals, pretend like we can show any amount */ |
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| 118 | return(smart_terminal ? lines : Largest); |
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| 119 | } |
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| 120 | |
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| 121 | int display_init(statics) |
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| 122 | |
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| 123 | struct statics *statics; |
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| 124 | |
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| 125 | { |
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| 126 | register int lines; |
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| 127 | register char **pp; |
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| 128 | register int *ip; |
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| 129 | register int i; |
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| 130 | |
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| 131 | /* call resize to do the dirty work */ |
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| 132 | lines = display_resize(); |
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| 133 | |
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| 134 | /* only do the rest if we need to */ |
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| 135 | if (lines > -1) |
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| 136 | { |
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| 137 | /* save pointers and allocate space for names */ |
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| 138 | procstate_names = statics->procstate_names; |
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| 139 | num_procstates = string_count(procstate_names); |
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| 140 | lprocstates = (int *)malloc(num_procstates * sizeof(int)); |
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| 141 | |
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| 142 | cpustate_names = statics->cpustate_names; |
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| 143 | num_cpustates = string_count(cpustate_names); |
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| 144 | lcpustates = (int *)malloc(num_cpustates * sizeof(int)); |
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| 145 | cpustate_columns = (int *)malloc(num_cpustates * sizeof(int)); |
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| 146 | |
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| 147 | memory_names = statics->memory_names; |
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| 148 | num_memory = string_count(memory_names); |
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| 149 | lmemory = (int *)malloc(num_memory * sizeof(int)); |
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| 150 | |
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| 151 | /* calculate starting columns where needed */ |
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| 152 | cpustate_total_length = 0; |
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| 153 | pp = cpustate_names; |
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| 154 | ip = cpustate_columns; |
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| 155 | while (*pp != NULL) |
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| 156 | { |
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| 157 | if ((i = strlen(*pp++)) > 0) |
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| 158 | { |
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| 159 | *ip++ = cpustate_total_length; |
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| 160 | cpustate_total_length += i + 8; |
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| 161 | } |
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| 162 | } |
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| 163 | } |
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| 164 | |
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| 165 | /* return number of lines available */ |
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| 166 | return(lines); |
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| 167 | } |
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| 168 | |
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| 169 | i_loadave(mpid, avenrun) |
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| 170 | |
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| 171 | int mpid; |
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| 172 | double *avenrun; |
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| 173 | |
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| 174 | { |
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| 175 | register int i; |
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| 176 | |
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| 177 | /* i_loadave also clears the screen, since it is first */ |
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| 178 | clear(); |
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| 179 | |
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| 180 | /* mpid == -1 implies this system doesn't have an _mpid */ |
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| 181 | if (mpid != -1) |
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| 182 | { |
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| 183 | printf("last pid: %5d; ", mpid); |
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| 184 | } |
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| 185 | |
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| 186 | printf("load averages"); |
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| 187 | |
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| 188 | for (i = 0; i < 3; i++) |
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| 189 | { |
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| 190 | printf("%c %5.2f", |
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| 191 | i == 0 ? ':' : ',', |
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| 192 | avenrun[i]); |
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| 193 | } |
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| 194 | lmpid = mpid; |
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| 195 | } |
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| 196 | |
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| 197 | u_loadave(mpid, avenrun) |
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| 198 | |
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| 199 | int mpid; |
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| 200 | double *avenrun; |
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| 201 | |
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| 202 | { |
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| 203 | register int i; |
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| 204 | |
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| 205 | if (mpid != -1) |
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| 206 | { |
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| 207 | /* change screen only when value has really changed */ |
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| 208 | if (mpid != lmpid) |
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| 209 | { |
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| 210 | Move_to(x_lastpid, y_lastpid); |
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| 211 | printf("%5d", mpid); |
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| 212 | lmpid = mpid; |
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| 213 | } |
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| 214 | |
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| 215 | /* i remembers x coordinate to move to */ |
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| 216 | i = x_loadave; |
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| 217 | } |
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| 218 | else |
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| 219 | { |
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| 220 | i = x_loadave_nompid; |
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| 221 | } |
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| 222 | |
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| 223 | /* move into position for load averages */ |
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| 224 | Move_to(i, y_loadave); |
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| 225 | |
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| 226 | /* display new load averages */ |
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| 227 | /* we should optimize this and only display changes */ |
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| 228 | for (i = 0; i < 3; i++) |
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| 229 | { |
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| 230 | printf("%s%5.2f", |
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| 231 | i == 0 ? "" : ", ", |
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| 232 | avenrun[i]); |
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| 233 | } |
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| 234 | } |
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| 235 | |
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| 236 | i_timeofday(tod) |
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| 237 | |
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| 238 | time_t *tod; |
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| 239 | |
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| 240 | { |
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| 241 | /* |
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| 242 | * Display the current time. |
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| 243 | * "ctime" always returns a string that looks like this: |
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| 244 | * |
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| 245 | * Sun Sep 16 01:03:52 1973 |
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| 246 | * 012345678901234567890123 |
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| 247 | * 1 2 |
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| 248 | * |
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| 249 | * We want indices 11 thru 18 (length 8). |
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| 250 | */ |
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| 251 | |
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| 252 | if (smart_terminal) |
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| 253 | { |
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| 254 | Move_to(screen_width - 8, 0); |
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| 255 | } |
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| 256 | else |
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| 257 | { |
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| 258 | fputs(" ", stdout); |
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| 259 | } |
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| 260 | #ifdef DEBUG |
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| 261 | { |
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| 262 | char *foo; |
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| 263 | foo = ctime(tod); |
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| 264 | fputs(foo, stdout); |
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| 265 | } |
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| 266 | #endif |
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| 267 | printf("%-8.8s\n", &(ctime(tod)[11])); |
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| 268 | lastline = 1; |
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| 269 | } |
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| 270 | |
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| 271 | static int ltotal = 0; |
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| 272 | static char procstates_buffer[128]; |
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| 273 | |
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| 274 | /* |
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| 275 | * *_procstates(total, brkdn, names) - print the process summary line |
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| 276 | * |
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| 277 | * Assumptions: cursor is at the beginning of the line on entry |
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| 278 | * lastline is valid |
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| 279 | */ |
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| 280 | |
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| 281 | i_procstates(total, brkdn) |
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| 282 | |
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| 283 | int total; |
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| 284 | int *brkdn; |
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| 285 | |
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| 286 | { |
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| 287 | register int i; |
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| 288 | |
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| 289 | /* write current number of processes and remember the value */ |
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| 290 | printf("%d processes:", total); |
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| 291 | ltotal = total; |
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| 292 | |
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| 293 | /* put out enough spaces to get to column 15 */ |
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| 294 | i = digits(total); |
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| 295 | while (i++ < 4) |
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| 296 | { |
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| 297 | putchar(' '); |
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| 298 | } |
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| 299 | |
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| 300 | /* format and print the process state summary */ |
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| 301 | summary_format(procstates_buffer, brkdn, procstate_names); |
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| 302 | fputs(procstates_buffer, stdout); |
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| 303 | |
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| 304 | /* save the numbers for next time */ |
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| 305 | memcpy(lprocstates, brkdn, num_procstates * sizeof(int)); |
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| 306 | } |
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| 307 | |
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| 308 | u_procstates(total, brkdn) |
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| 309 | |
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| 310 | int total; |
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| 311 | int *brkdn; |
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| 312 | |
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| 313 | { |
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| 314 | static char new[128]; |
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| 315 | register int i; |
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| 316 | |
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| 317 | /* update number of processes only if it has changed */ |
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| 318 | if (ltotal != total) |
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| 319 | { |
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| 320 | /* move and overwrite */ |
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| 321 | #if (x_procstate == 0) |
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| 322 | Move_to(x_procstate, y_procstate); |
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| 323 | #else |
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| 324 | /* cursor is already there...no motion needed */ |
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| 325 | /* assert(lastline == 1); */ |
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| 326 | #endif |
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| 327 | printf("%d", total); |
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| 328 | |
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| 329 | /* if number of digits differs, rewrite the label */ |
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| 330 | if (digits(total) != digits(ltotal)) |
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| 331 | { |
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| 332 | fputs(" processes:", stdout); |
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| 333 | /* put out enough spaces to get to column 15 */ |
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| 334 | i = digits(total); |
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| 335 | while (i++ < 4) |
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| 336 | { |
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| 337 | putchar(' '); |
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| 338 | } |
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| 339 | /* cursor may end up right where we want it!!! */ |
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| 340 | } |
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| 341 | |
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| 342 | /* save new total */ |
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| 343 | ltotal = total; |
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| 344 | } |
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| 345 | |
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| 346 | /* see if any of the state numbers has changed */ |
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| 347 | if (memcmp(lprocstates, brkdn, num_procstates * sizeof(int)) != 0) |
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| 348 | { |
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| 349 | /* format and update the line */ |
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| 350 | summary_format(new, brkdn, procstate_names); |
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| 351 | line_update(procstates_buffer, new, x_brkdn, y_brkdn); |
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| 352 | memcpy(lprocstates, brkdn, num_procstates * sizeof(int)); |
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| 353 | } |
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| 354 | } |
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| 355 | |
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| 356 | /* |
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| 357 | * *_cpustates(states, names) - print the cpu state percentages |
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| 358 | * |
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| 359 | * Assumptions: cursor is on the PREVIOUS line |
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| 360 | */ |
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| 361 | |
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| 362 | static int cpustates_column; |
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| 363 | |
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| 364 | /* cpustates_tag() calculates the correct tag to use to label the line */ |
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| 365 | |
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| 366 | char *cpustates_tag() |
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| 367 | |
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| 368 | { |
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| 369 | register char *use; |
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| 370 | |
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| 371 | static char *short_tag = "CPU: "; |
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| 372 | static char *long_tag = "CPU states: "; |
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| 373 | |
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| 374 | /* if length + strlen(long_tag) >= screen_width, then we have to |
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| 375 | use the shorter tag (we subtract 2 to account for ": ") */ |
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| 376 | if (cpustate_total_length + (int)strlen(long_tag) - 2 >= screen_width) |
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| 377 | { |
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| 378 | use = short_tag; |
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| 379 | } |
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| 380 | else |
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| 381 | { |
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| 382 | use = long_tag; |
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| 383 | } |
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| 384 | |
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| 385 | /* set cpustates_column accordingly then return result */ |
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| 386 | cpustates_column = strlen(use); |
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| 387 | return(use); |
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| 388 | } |
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| 389 | |
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| 390 | i_cpustates(states) |
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| 391 | |
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| 392 | register int *states; |
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| 393 | |
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| 394 | { |
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| 395 | register int i = 0; |
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| 396 | register int value; |
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| 397 | register char **names = cpustate_names; |
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| 398 | register char *thisname; |
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| 399 | |
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| 400 | /* print tag and bump lastline */ |
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| 401 | printf("\n%s", cpustates_tag()); |
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| 402 | lastline++; |
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| 403 | |
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| 404 | /* now walk thru the names and print the line */ |
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| 405 | while ((thisname = *names++) != NULL) |
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| 406 | { |
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| 407 | if (*thisname != '\0') |
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| 408 | { |
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| 409 | /* retrieve the value and remember it */ |
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| 410 | value = *states++; |
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| 411 | |
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| 412 | /* if percentage is >= 1000, print it as 100% */ |
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| 413 | printf((value >= 1000 ? "%s%4.0f%% %s" : "%s%4.1f%% %s"), |
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| 414 | i++ == 0 ? "" : ", ", |
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| 415 | ((float)value)/10., |
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| 416 | thisname); |
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| 417 | } |
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| 418 | } |
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| 419 | |
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| 420 | /* copy over values into "last" array */ |
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| 421 | memcpy(lcpustates, states, num_cpustates * sizeof(int)); |
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| 422 | } |
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| 423 | |
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| 424 | u_cpustates(states) |
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| 425 | |
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| 426 | register int *states; |
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| 427 | |
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| 428 | { |
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| 429 | register int value; |
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| 430 | register char **names = cpustate_names; |
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| 431 | register char *thisname; |
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| 432 | register int *lp; |
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| 433 | register int *colp; |
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| 434 | |
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| 435 | Move_to(cpustates_column, y_cpustates); |
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| 436 | lastline = y_cpustates; |
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| 437 | lp = lcpustates; |
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| 438 | colp = cpustate_columns; |
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| 439 | |
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| 440 | /* we could be much more optimal about this */ |
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| 441 | while ((thisname = *names++) != NULL) |
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| 442 | { |
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| 443 | if (*thisname != '\0') |
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| 444 | { |
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| 445 | /* did the value change since last time? */ |
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| 446 | if (*lp != *states) |
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| 447 | { |
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| 448 | /* yes, move and change */ |
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| 449 | Move_to(cpustates_column + *colp, y_cpustates); |
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| 450 | lastline = y_cpustates; |
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| 451 | |
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| 452 | /* retrieve value and remember it */ |
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| 453 | value = *states; |
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| 454 | |
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| 455 | /* if percentage is >= 1000, print it as 100% */ |
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| 456 | printf((value >= 1000 ? "%4.0f" : "%4.1f"), |
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| 457 | ((double)value)/10.); |
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| 458 | |
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| 459 | /* remember it for next time */ |
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| 460 | *lp = *states; |
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| 461 | } |
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| 462 | } |
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| 463 | |
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| 464 | /* increment and move on */ |
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| 465 | lp++; |
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| 466 | states++; |
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| 467 | colp++; |
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| 468 | } |
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| 469 | } |
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| 470 | |
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| 471 | z_cpustates() |
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| 472 | |
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| 473 | { |
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| 474 | register int i = 0; |
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| 475 | register char **names = cpustate_names; |
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| 476 | register char *thisname; |
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| 477 | register int *lp; |
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| 478 | |
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| 479 | /* show tag and bump lastline */ |
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| 480 | printf("\n%s", cpustates_tag()); |
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| 481 | lastline++; |
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| 482 | |
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| 483 | while ((thisname = *names++) != NULL) |
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| 484 | { |
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| 485 | if (*thisname != '\0') |
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| 486 | { |
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| 487 | printf("%s %% %s", i++ == 0 ? "" : ", ", thisname); |
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| 488 | } |
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| 489 | } |
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| 490 | |
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| 491 | /* fill the "last" array with all -1s, to insure correct updating */ |
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| 492 | lp = lcpustates; |
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| 493 | i = num_cpustates; |
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| 494 | while (--i >= 0) |
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| 495 | { |
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| 496 | *lp++ = -1; |
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| 497 | } |
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| 498 | } |
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| 499 | |
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| 500 | /* |
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| 501 | * *_memory(stats) - print "Memory: " followed by the memory summary string |
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| 502 | * |
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| 503 | * Assumptions: cursor is on "lastline" |
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| 504 | * for i_memory ONLY: cursor is on the previous line |
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| 505 | */ |
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| 506 | |
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| 507 | char memory_buffer[MAX_COLS]; |
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| 508 | |
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| 509 | i_memory(stats) |
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| 510 | |
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| 511 | int *stats; |
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| 512 | |
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| 513 | { |
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| 514 | fputs("\nMemory: ", stdout); |
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| 515 | lastline++; |
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| 516 | |
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| 517 | /* format and print the memory summary */ |
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| 518 | summary_format(memory_buffer, stats, memory_names); |
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| 519 | fputs(memory_buffer, stdout); |
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| 520 | } |
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| 521 | |
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| 522 | u_memory(stats) |
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| 523 | |
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| 524 | int *stats; |
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| 525 | |
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| 526 | { |
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| 527 | static char new[MAX_COLS]; |
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| 528 | |
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| 529 | /* format the new line */ |
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| 530 | summary_format(new, stats, memory_names); |
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| 531 | line_update(memory_buffer, new, x_mem, y_mem); |
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| 532 | } |
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| 533 | |
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| 534 | /* |
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| 535 | * *_message() - print the next pending message line, or erase the one |
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| 536 | * that is there. |
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| 537 | * |
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| 538 | * Note that u_message is (currently) the same as i_message. |
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| 539 | * |
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| 540 | * Assumptions: lastline is consistent |
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| 541 | */ |
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| 542 | |
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| 543 | /* |
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| 544 | * i_message is funny because it gets its message asynchronously (with |
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| 545 | * respect to screen updates). |
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| 546 | */ |
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| 547 | |
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| 548 | static char next_msg[MAX_COLS + 5]; |
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| 549 | static int msglen = 0; |
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| 550 | /* Invariant: msglen is always the length of the message currently displayed |
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| 551 | on the screen (even when next_msg doesn't contain that message). */ |
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| 552 | |
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| 553 | i_message() |
---|
| 554 | |
---|
| 555 | { |
---|
| 556 | while (lastline < y_message) |
---|
| 557 | { |
---|
| 558 | fputc('\n', stdout); |
---|
| 559 | lastline++; |
---|
| 560 | } |
---|
| 561 | if (next_msg[0] != '\0') |
---|
| 562 | { |
---|
| 563 | standout(next_msg); |
---|
| 564 | msglen = strlen(next_msg); |
---|
| 565 | next_msg[0] = '\0'; |
---|
| 566 | } |
---|
| 567 | else if (msglen > 0) |
---|
| 568 | { |
---|
| 569 | (void) clear_eol(msglen); |
---|
| 570 | msglen = 0; |
---|
| 571 | } |
---|
| 572 | } |
---|
| 573 | |
---|
| 574 | u_message() |
---|
| 575 | |
---|
| 576 | { |
---|
| 577 | i_message(); |
---|
| 578 | } |
---|
| 579 | |
---|
| 580 | static int header_length; |
---|
| 581 | |
---|
| 582 | /* |
---|
| 583 | * *_header(text) - print the header for the process area |
---|
| 584 | * |
---|
| 585 | * Assumptions: cursor is on the previous line and lastline is consistent |
---|
| 586 | */ |
---|
| 587 | |
---|
| 588 | i_header(text) |
---|
| 589 | |
---|
| 590 | char *text; |
---|
| 591 | |
---|
| 592 | { |
---|
| 593 | header_length = strlen(text); |
---|
| 594 | if (header_status == ON) |
---|
| 595 | { |
---|
| 596 | putchar('\n'); |
---|
| 597 | fputs(text, stdout); |
---|
| 598 | lastline++; |
---|
| 599 | } |
---|
| 600 | else if (header_status == ERASE) |
---|
| 601 | { |
---|
| 602 | header_status = OFF; |
---|
| 603 | } |
---|
| 604 | } |
---|
| 605 | |
---|
| 606 | /*ARGSUSED*/ |
---|
| 607 | u_header(text) |
---|
| 608 | |
---|
| 609 | char *text; /* ignored */ |
---|
| 610 | |
---|
| 611 | { |
---|
| 612 | if (header_status == ERASE) |
---|
| 613 | { |
---|
| 614 | putchar('\n'); |
---|
| 615 | lastline++; |
---|
| 616 | clear_eol(header_length); |
---|
| 617 | header_status = OFF; |
---|
| 618 | } |
---|
| 619 | } |
---|
| 620 | |
---|
| 621 | /* |
---|
| 622 | * *_process(line, thisline) - print one process line |
---|
| 623 | * |
---|
| 624 | * Assumptions: lastline is consistent |
---|
| 625 | */ |
---|
| 626 | |
---|
| 627 | i_process(line, thisline) |
---|
| 628 | |
---|
| 629 | int line; |
---|
| 630 | char *thisline; |
---|
| 631 | |
---|
| 632 | { |
---|
| 633 | register char *p; |
---|
| 634 | register char *base; |
---|
| 635 | |
---|
| 636 | /* make sure we are on the correct line */ |
---|
| 637 | while (lastline < y_procs + line) |
---|
| 638 | { |
---|
| 639 | putchar('\n'); |
---|
| 640 | lastline++; |
---|
| 641 | } |
---|
| 642 | |
---|
| 643 | /* truncate the line to conform to our current screen width */ |
---|
| 644 | thisline[display_width] = '\0'; |
---|
| 645 | |
---|
| 646 | /* write the line out */ |
---|
| 647 | fputs(thisline, stdout); |
---|
| 648 | |
---|
| 649 | /* copy it in to our buffer */ |
---|
| 650 | base = smart_terminal ? screenbuf + lineindex(line) : screenbuf; |
---|
| 651 | p = strecpy(base, thisline); |
---|
| 652 | |
---|
| 653 | /* zero fill the rest of it */ |
---|
| 654 | memzero(p, display_width - (p - base)); |
---|
| 655 | } |
---|
| 656 | |
---|
| 657 | u_process(line, newline) |
---|
| 658 | |
---|
| 659 | int line; |
---|
| 660 | char *newline; |
---|
| 661 | |
---|
| 662 | { |
---|
| 663 | register char *optr; |
---|
| 664 | register int screen_line = line + Header_lines; |
---|
| 665 | register char *bufferline; |
---|
| 666 | |
---|
| 667 | /* remember a pointer to the current line in the screen buffer */ |
---|
| 668 | bufferline = &screenbuf[lineindex(line)]; |
---|
| 669 | |
---|
| 670 | /* truncate the line to conform to our current screen width */ |
---|
| 671 | newline[display_width] = '\0'; |
---|
| 672 | |
---|
| 673 | /* is line higher than we went on the last display? */ |
---|
| 674 | if (line >= last_hi) |
---|
| 675 | { |
---|
| 676 | /* yes, just ignore screenbuf and write it out directly */ |
---|
| 677 | /* get positioned on the correct line */ |
---|
| 678 | if (screen_line - lastline == 1) |
---|
| 679 | { |
---|
| 680 | putchar('\n'); |
---|
| 681 | lastline++; |
---|
| 682 | } |
---|
| 683 | else |
---|
| 684 | { |
---|
| 685 | Move_to(0, screen_line); |
---|
| 686 | lastline = screen_line; |
---|
| 687 | } |
---|
| 688 | |
---|
| 689 | /* now write the line */ |
---|
| 690 | fputs(newline, stdout); |
---|
| 691 | |
---|
| 692 | /* copy it in to the buffer */ |
---|
| 693 | optr = strecpy(bufferline, newline); |
---|
| 694 | |
---|
| 695 | /* zero fill the rest of it */ |
---|
| 696 | memzero(optr, display_width - (optr - bufferline)); |
---|
| 697 | } |
---|
| 698 | else |
---|
| 699 | { |
---|
| 700 | line_update(bufferline, newline, 0, line + Header_lines); |
---|
| 701 | } |
---|
| 702 | } |
---|
| 703 | |
---|
| 704 | u_endscreen(hi) |
---|
| 705 | |
---|
| 706 | register int hi; |
---|
| 707 | |
---|
| 708 | { |
---|
| 709 | register int screen_line = hi + Header_lines; |
---|
| 710 | register int i; |
---|
| 711 | |
---|
| 712 | if (smart_terminal) |
---|
| 713 | { |
---|
| 714 | if (hi < last_hi) |
---|
| 715 | { |
---|
| 716 | /* need to blank the remainder of the screen */ |
---|
| 717 | /* but only if there is any screen left below this line */ |
---|
| 718 | if (lastline + 1 < screen_length) |
---|
| 719 | { |
---|
| 720 | /* efficiently move to the end of currently displayed info */ |
---|
| 721 | if (screen_line - lastline < 5) |
---|
| 722 | { |
---|
| 723 | while (lastline < screen_line) |
---|
| 724 | { |
---|
| 725 | putchar('\n'); |
---|
| 726 | lastline++; |
---|
| 727 | } |
---|
| 728 | } |
---|
| 729 | else |
---|
| 730 | { |
---|
| 731 | Move_to(0, screen_line); |
---|
| 732 | lastline = screen_line; |
---|
| 733 | } |
---|
| 734 | |
---|
| 735 | if (clear_to_end) |
---|
| 736 | { |
---|
| 737 | /* we can do this the easy way */ |
---|
| 738 | putcap(clear_to_end); |
---|
| 739 | } |
---|
| 740 | else |
---|
| 741 | { |
---|
| 742 | /* use clear_eol on each line */ |
---|
| 743 | i = hi; |
---|
| 744 | while ((void) clear_eol(strlen(&screenbuf[lineindex(i++)])), i < last_hi) |
---|
| 745 | { |
---|
| 746 | putchar('\n'); |
---|
| 747 | } |
---|
| 748 | } |
---|
| 749 | } |
---|
| 750 | } |
---|
| 751 | last_hi = hi; |
---|
| 752 | |
---|
| 753 | /* move the cursor to a pleasant place */ |
---|
| 754 | Move_to(x_idlecursor, y_idlecursor); |
---|
| 755 | lastline = y_idlecursor; |
---|
| 756 | } |
---|
| 757 | else |
---|
| 758 | { |
---|
| 759 | /* separate this display from the next with some vertical room */ |
---|
| 760 | fputs("\n\n", stdout); |
---|
| 761 | } |
---|
| 762 | } |
---|
| 763 | |
---|
| 764 | display_header(t) |
---|
| 765 | |
---|
| 766 | int t; |
---|
| 767 | |
---|
| 768 | { |
---|
| 769 | if (t) |
---|
| 770 | { |
---|
| 771 | header_status = ON; |
---|
| 772 | } |
---|
| 773 | else if (header_status == ON) |
---|
| 774 | { |
---|
| 775 | header_status = ERASE; |
---|
| 776 | } |
---|
| 777 | } |
---|
| 778 | |
---|
| 779 | /*VARARGS2*/ |
---|
| 780 | new_message(type, msgfmt, a1, a2, a3) |
---|
| 781 | |
---|
| 782 | int type; |
---|
| 783 | char *msgfmt; |
---|
| 784 | caddr_t a1, a2, a3; |
---|
| 785 | |
---|
| 786 | { |
---|
| 787 | register int i; |
---|
| 788 | |
---|
| 789 | /* first, format the message */ |
---|
| 790 | (void) sprintf(next_msg, msgfmt, a1, a2, a3); |
---|
| 791 | |
---|
| 792 | if (msglen > 0) |
---|
| 793 | { |
---|
| 794 | /* message there already -- can we clear it? */ |
---|
| 795 | if (!overstrike) |
---|
| 796 | { |
---|
| 797 | /* yes -- write it and clear to end */ |
---|
| 798 | i = strlen(next_msg); |
---|
| 799 | if ((type & MT_delayed) == 0) |
---|
| 800 | { |
---|
| 801 | type & MT_standout ? standout(next_msg) : |
---|
| 802 | fputs(next_msg, stdout); |
---|
| 803 | (void) clear_eol(msglen - i); |
---|
| 804 | msglen = i; |
---|
| 805 | next_msg[0] = '\0'; |
---|
| 806 | } |
---|
| 807 | } |
---|
| 808 | } |
---|
| 809 | else |
---|
| 810 | { |
---|
| 811 | if ((type & MT_delayed) == 0) |
---|
| 812 | { |
---|
| 813 | type & MT_standout ? standout(next_msg) : fputs(next_msg, stdout); |
---|
| 814 | msglen = strlen(next_msg); |
---|
| 815 | next_msg[0] = '\0'; |
---|
| 816 | } |
---|
| 817 | } |
---|
| 818 | } |
---|
| 819 | |
---|
| 820 | clear_message() |
---|
| 821 | |
---|
| 822 | { |
---|
| 823 | if (clear_eol(msglen) == 1) |
---|
| 824 | { |
---|
| 825 | putchar('\r'); |
---|
| 826 | } |
---|
| 827 | } |
---|
| 828 | |
---|
| 829 | readline(buffer, size, numeric) |
---|
| 830 | |
---|
| 831 | char *buffer; |
---|
| 832 | int size; |
---|
| 833 | int numeric; |
---|
| 834 | |
---|
| 835 | { |
---|
| 836 | register char *ptr = buffer; |
---|
| 837 | register char ch; |
---|
| 838 | register char cnt = 0; |
---|
| 839 | register char maxcnt = 0; |
---|
| 840 | |
---|
| 841 | /* allow room for null terminator */ |
---|
| 842 | size -= 1; |
---|
| 843 | |
---|
| 844 | /* read loop */ |
---|
| 845 | while ((fflush(stdout), read(0, ptr, 1) > 0)) |
---|
| 846 | { |
---|
| 847 | /* newline means we are done */ |
---|
| 848 | if ((ch = *ptr) == '\n') |
---|
| 849 | { |
---|
| 850 | break; |
---|
| 851 | } |
---|
| 852 | |
---|
| 853 | /* handle special editing characters */ |
---|
| 854 | if (ch == ch_kill) |
---|
| 855 | { |
---|
| 856 | /* kill line -- account for overstriking */ |
---|
| 857 | if (overstrike) |
---|
| 858 | { |
---|
| 859 | msglen += maxcnt; |
---|
| 860 | } |
---|
| 861 | |
---|
| 862 | /* return null string */ |
---|
| 863 | *buffer = '\0'; |
---|
| 864 | putchar('\r'); |
---|
| 865 | return(-1); |
---|
| 866 | } |
---|
| 867 | else if (ch == ch_erase) |
---|
| 868 | { |
---|
| 869 | /* erase previous character */ |
---|
| 870 | if (cnt <= 0) |
---|
| 871 | { |
---|
| 872 | /* none to erase! */ |
---|
| 873 | putchar('\7'); |
---|
| 874 | } |
---|
| 875 | else |
---|
| 876 | { |
---|
| 877 | fputs("\b \b", stdout); |
---|
| 878 | ptr--; |
---|
| 879 | cnt--; |
---|
| 880 | } |
---|
| 881 | } |
---|
| 882 | /* check for character validity and buffer overflow */ |
---|
| 883 | else if (cnt == size || (numeric && !isdigit(ch)) || |
---|
| 884 | !isprint(ch)) |
---|
| 885 | { |
---|
| 886 | /* not legal */ |
---|
| 887 | putchar('\7'); |
---|
| 888 | } |
---|
| 889 | else |
---|
| 890 | { |
---|
| 891 | /* echo it and store it in the buffer */ |
---|
| 892 | putchar(ch); |
---|
| 893 | ptr++; |
---|
| 894 | cnt++; |
---|
| 895 | if (cnt > maxcnt) |
---|
| 896 | { |
---|
| 897 | maxcnt = cnt; |
---|
| 898 | } |
---|
| 899 | } |
---|
| 900 | } |
---|
| 901 | |
---|
| 902 | /* all done -- null terminate the string */ |
---|
| 903 | *ptr = '\0'; |
---|
| 904 | |
---|
| 905 | /* account for the extra characters in the message area */ |
---|
| 906 | /* (if terminal overstrikes, remember the furthest they went) */ |
---|
| 907 | msglen += overstrike ? maxcnt : cnt; |
---|
| 908 | |
---|
| 909 | /* return either inputted number or string length */ |
---|
| 910 | putchar('\r'); |
---|
| 911 | return(cnt == 0 ? -1 : numeric ? atoi(buffer) : cnt); |
---|
| 912 | } |
---|
| 913 | |
---|
| 914 | /* internal support routines */ |
---|
| 915 | |
---|
| 916 | static int string_count(pp) |
---|
| 917 | |
---|
| 918 | register char **pp; |
---|
| 919 | |
---|
| 920 | { |
---|
| 921 | register int cnt; |
---|
| 922 | |
---|
| 923 | cnt = 0; |
---|
| 924 | while (*pp++ != NULL) |
---|
| 925 | { |
---|
| 926 | cnt++; |
---|
| 927 | } |
---|
| 928 | return(cnt); |
---|
| 929 | } |
---|
| 930 | |
---|
| 931 | static void summary_format(str, numbers, names) |
---|
| 932 | |
---|
| 933 | char *str; |
---|
| 934 | int *numbers; |
---|
| 935 | register char **names; |
---|
| 936 | |
---|
| 937 | { |
---|
| 938 | register char *p; |
---|
| 939 | register int num; |
---|
| 940 | register char *thisname; |
---|
| 941 | register int useM = No; |
---|
| 942 | |
---|
| 943 | /* format each number followed by its string */ |
---|
| 944 | p = str; |
---|
| 945 | while ((thisname = *names++) != NULL) |
---|
| 946 | { |
---|
| 947 | /* get the number to format */ |
---|
| 948 | num = *numbers++; |
---|
| 949 | |
---|
| 950 | /* display only non-zero numbers */ |
---|
| 951 | if (num > 0) |
---|
| 952 | { |
---|
| 953 | /* is this number in kilobytes? */ |
---|
| 954 | if (thisname[0] == 'K') |
---|
| 955 | { |
---|
| 956 | /* yes: format it as a memory value */ |
---|
| 957 | p = strecpy(p, format_k(num)); |
---|
| 958 | |
---|
| 959 | /* skip over the K, since it was included by format_k */ |
---|
| 960 | p = strecpy(p, thisname+1); |
---|
| 961 | } |
---|
| 962 | else |
---|
| 963 | { |
---|
| 964 | p = strecpy(p, itoa(num)); |
---|
| 965 | p = strecpy(p, thisname); |
---|
| 966 | } |
---|
| 967 | } |
---|
| 968 | |
---|
| 969 | /* ignore negative numbers, but display corresponding string */ |
---|
| 970 | else if (num < 0) |
---|
| 971 | { |
---|
| 972 | p = strecpy(p, thisname); |
---|
| 973 | } |
---|
| 974 | } |
---|
| 975 | |
---|
| 976 | /* if the last two characters in the string are ", ", delete them */ |
---|
| 977 | p -= 2; |
---|
| 978 | if (p >= str && p[0] == ',' && p[1] == ' ') |
---|
| 979 | { |
---|
| 980 | *p = '\0'; |
---|
| 981 | } |
---|
| 982 | } |
---|
| 983 | |
---|
| 984 | static void line_update(old, new, start, line) |
---|
| 985 | |
---|
| 986 | register char *old; |
---|
| 987 | register char *new; |
---|
| 988 | int start; |
---|
| 989 | int line; |
---|
| 990 | |
---|
| 991 | { |
---|
| 992 | register int ch; |
---|
| 993 | register int diff; |
---|
| 994 | register int newcol = start + 1; |
---|
| 995 | register int lastcol = start; |
---|
| 996 | char cursor_on_line = No; |
---|
| 997 | char *current; |
---|
| 998 | |
---|
| 999 | /* compare the two strings and only rewrite what has changed */ |
---|
| 1000 | current = old; |
---|
| 1001 | #ifdef DEBUG |
---|
| 1002 | fprintf(debug, "line_update, starting at %d\n", start); |
---|
| 1003 | fputs(old, debug); |
---|
| 1004 | fputc('\n', debug); |
---|
| 1005 | fputs(new, debug); |
---|
| 1006 | fputs("\n-\n", debug); |
---|
| 1007 | #endif |
---|
| 1008 | |
---|
| 1009 | /* start things off on the right foot */ |
---|
| 1010 | /* this is to make sure the invariants get set up right */ |
---|
| 1011 | if ((ch = *new++) != *old) |
---|
| 1012 | { |
---|
| 1013 | if (line - lastline == 1 && start == 0) |
---|
| 1014 | { |
---|
| 1015 | putchar('\n'); |
---|
| 1016 | } |
---|
| 1017 | else |
---|
| 1018 | { |
---|
| 1019 | Move_to(start, line); |
---|
| 1020 | } |
---|
| 1021 | cursor_on_line = Yes; |
---|
| 1022 | putchar(ch); |
---|
| 1023 | *old = ch; |
---|
| 1024 | lastcol = 1; |
---|
| 1025 | } |
---|
| 1026 | old++; |
---|
| 1027 | |
---|
| 1028 | /* |
---|
| 1029 | * main loop -- check each character. If the old and new aren't the |
---|
| 1030 | * same, then update the display. When the distance from the |
---|
| 1031 | * current cursor position to the new change is small enough, |
---|
| 1032 | * the characters that belong there are written to move the |
---|
| 1033 | * cursor over. |
---|
| 1034 | * |
---|
| 1035 | * Invariants: |
---|
| 1036 | * lastcol is the column where the cursor currently is sitting |
---|
| 1037 | * (always one beyond the end of the last mismatch). |
---|
| 1038 | */ |
---|
| 1039 | do /* yes, a do...while */ |
---|
| 1040 | { |
---|
| 1041 | if ((ch = *new++) != *old) |
---|
| 1042 | { |
---|
| 1043 | /* new character is different from old */ |
---|
| 1044 | /* make sure the cursor is on top of this character */ |
---|
| 1045 | diff = newcol - lastcol; |
---|
| 1046 | if (diff > 0) |
---|
| 1047 | { |
---|
| 1048 | /* some motion is required--figure out which is shorter */ |
---|
| 1049 | if (diff < 6 && cursor_on_line) |
---|
| 1050 | { |
---|
| 1051 | /* overwrite old stuff--get it out of the old buffer */ |
---|
| 1052 | printf("%.*s", diff, ¤t[lastcol-start]); |
---|
| 1053 | } |
---|
| 1054 | else |
---|
| 1055 | { |
---|
| 1056 | /* use cursor addressing */ |
---|
| 1057 | Move_to(newcol, line); |
---|
| 1058 | cursor_on_line = Yes; |
---|
| 1059 | } |
---|
| 1060 | /* remember where the cursor is */ |
---|
| 1061 | lastcol = newcol + 1; |
---|
| 1062 | } |
---|
| 1063 | else |
---|
| 1064 | { |
---|
| 1065 | /* already there, update position */ |
---|
| 1066 | lastcol++; |
---|
| 1067 | } |
---|
| 1068 | |
---|
| 1069 | /* write what we need to */ |
---|
| 1070 | if (ch == '\0') |
---|
| 1071 | { |
---|
| 1072 | /* at the end--terminate with a clear-to-end-of-line */ |
---|
| 1073 | (void) clear_eol(strlen(old)); |
---|
| 1074 | } |
---|
| 1075 | else |
---|
| 1076 | { |
---|
| 1077 | /* write the new character */ |
---|
| 1078 | putchar(ch); |
---|
| 1079 | } |
---|
| 1080 | /* put the new character in the screen buffer */ |
---|
| 1081 | *old = ch; |
---|
| 1082 | } |
---|
| 1083 | |
---|
| 1084 | /* update working column and screen buffer pointer */ |
---|
| 1085 | newcol++; |
---|
| 1086 | old++; |
---|
| 1087 | |
---|
| 1088 | } while (ch != '\0'); |
---|
| 1089 | |
---|
| 1090 | /* zero out the rest of the line buffer -- MUST BE DONE! */ |
---|
| 1091 | diff = display_width - newcol; |
---|
| 1092 | if (diff > 0) |
---|
| 1093 | { |
---|
| 1094 | memzero(old, diff); |
---|
| 1095 | } |
---|
| 1096 | |
---|
| 1097 | /* remember where the current line is */ |
---|
| 1098 | if (cursor_on_line) |
---|
| 1099 | { |
---|
| 1100 | lastline = line; |
---|
| 1101 | } |
---|
| 1102 | } |
---|
| 1103 | |
---|
| 1104 | /* |
---|
| 1105 | * printable(str) - make the string pointed to by "str" into one that is |
---|
| 1106 | * printable (i.e.: all ascii), by converting all non-printable |
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| 1107 | * characters into '?'. Replacements are done in place and a pointer |
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| 1108 | * to the original buffer is returned. |
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| 1109 | */ |
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| 1110 | |
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| 1111 | char *printable(str) |
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| 1112 | |
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| 1113 | char *str; |
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| 1114 | |
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| 1115 | { |
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| 1116 | register char *ptr; |
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| 1117 | register char ch; |
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| 1118 | |
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| 1119 | ptr = str; |
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| 1120 | while ((ch = *ptr) != '\0') |
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| 1121 | { |
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| 1122 | if (!isprint(ch)) |
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| 1123 | { |
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| 1124 | *ptr = '?'; |
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| 1125 | } |
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| 1126 | ptr++; |
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| 1127 | } |
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| 1128 | return(str); |
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| 1129 | } |
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