db_output.c (37224cd3fcb911d440e40dd8e1f31652e2452537) db_output.c (d39d4a6e6412f88225d1b78c8a797ab82daac250)
1/*
2 * Mach Operating System
3 * Copyright (c) 1991,1990 Carnegie Mellon University
4 * All Rights Reserved.
5 *
6 * Permission to use, copy, modify and distribute this software and its
7 * documentation is hereby granted, provided that both the copyright
8 * notice and this permission notice appear in all copies of the

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60 * of the wraparounds.
61 */
62static int db_output_position = 0; /* output column */
63static int db_last_non_space = 0; /* last non-space character */
64db_expr_t db_tab_stop_width = 8; /* how wide are tab stops? */
65#define NEXT_TAB(i) \
66 ((((i) + db_tab_stop_width) / db_tab_stop_width) * db_tab_stop_width)
67db_expr_t db_max_width = 79; /* output line width */
1/*
2 * Mach Operating System
3 * Copyright (c) 1991,1990 Carnegie Mellon University
4 * All Rights Reserved.
5 *
6 * Permission to use, copy, modify and distribute this software and its
7 * documentation is hereby granted, provided that both the copyright
8 * notice and this permission notice appear in all copies of the

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60 * of the wraparounds.
61 */
62static int db_output_position = 0; /* output column */
63static int db_last_non_space = 0; /* last non-space character */
64db_expr_t db_tab_stop_width = 8; /* how wide are tab stops? */
65#define NEXT_TAB(i) \
66 ((((i) + db_tab_stop_width) / db_tab_stop_width) * db_tab_stop_width)
67db_expr_t db_max_width = 79; /* output line width */
68db_expr_t db_lines_per_page = 20; /* lines per page */
68static int db_newlines; /* # lines this page */
69static int db_newlines; /* # lines this page */
69static int db_maxlines = -1; /* max lines per page */
70static int db_maxlines = -1; /* max lines/page when paging */
70static db_page_calloutfcn_t *db_page_callout = NULL;
71static void *db_page_callout_arg = NULL;
72static int ddb_use_printf = 0;
73SYSCTL_INT(_debug, OID_AUTO, ddb_use_printf, CTLFLAG_RW, &ddb_use_printf, 0,
74 "use printf for all ddb output");
75
76static void db_putchar(int c, void *arg);
77

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138 */
139 db_force_whitespace();
140 cnputc(c);
141 db_output_position++;
142 db_last_non_space = db_output_position;
143 }
144 else if (c == '\n') {
145 /* Newline */
71static db_page_calloutfcn_t *db_page_callout = NULL;
72static void *db_page_callout_arg = NULL;
73static int ddb_use_printf = 0;
74SYSCTL_INT(_debug, OID_AUTO, ddb_use_printf, CTLFLAG_RW, &ddb_use_printf, 0,
75 "use printf for all ddb output");
76
77static void db_putchar(int c, void *arg);
78

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139 */
140 db_force_whitespace();
141 cnputc(c);
142 db_output_position++;
143 db_last_non_space = db_output_position;
144 }
145 else if (c == '\n') {
146 /* Newline */
147 db_force_whitespace();
146 cnputc(c);
147 db_output_position = 0;
148 db_last_non_space = 0;
149 db_check_interrupt();
150 if (db_maxlines > 0 && db_page_callout != NULL) {
151 db_newlines++;
152 if (db_newlines >= db_maxlines) {
153 db_maxlines = -1;
154 db_page_callout(db_page_callout_arg);
155 }
156 }
157 }
158 else if (c == '\r') {
159 /* Return */
148 cnputc(c);
149 db_output_position = 0;
150 db_last_non_space = 0;
151 db_check_interrupt();
152 if (db_maxlines > 0 && db_page_callout != NULL) {
153 db_newlines++;
154 if (db_newlines >= db_maxlines) {
155 db_maxlines = -1;
156 db_page_callout(db_page_callout_arg);
157 }
158 }
159 }
160 else if (c == '\r') {
161 /* Return */
162 db_force_whitespace();
160 cnputc(c);
161 db_output_position = 0;
162 db_last_non_space = 0;
163 db_check_interrupt();
164 }
165 else if (c == '\t') {
166 /* assume tabs every 8 positions */
167 db_output_position = NEXT_TAB(db_output_position);

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192
193/*
194 * A simple paging callout function. If the argument is not null, it
195 * points to an integer that will be set to 1 if the user asks to quit.
196 */
197void
198db_simple_pager(void *arg)
199{
163 cnputc(c);
164 db_output_position = 0;
165 db_last_non_space = 0;
166 db_check_interrupt();
167 }
168 else if (c == '\t') {
169 /* assume tabs every 8 positions */
170 db_output_position = NEXT_TAB(db_output_position);

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195
196/*
197 * A simple paging callout function. If the argument is not null, it
198 * points to an integer that will be set to 1 if the user asks to quit.
199 */
200void
201db_simple_pager(void *arg)
202{
200 int c;
203 int c, done;
201
202 db_printf("--More--\r");
204
205 db_printf("--More--\r");
203 for (;;) {
206 done = 0;
207 while (!done) {
204 c = cngetc();
205 switch (c) {
208 c = cngetc();
209 switch (c) {
210 case 'e':
211 case 'j':
206 case '\n':
207 /* Just one more line. */
208 db_setup_paging(db_simple_pager, arg, 1);
212 case '\n':
213 /* Just one more line. */
214 db_setup_paging(db_simple_pager, arg, 1);
209 return;
215 done++;
216 break;
217 case 'd':
218 /* Half a page. */
219 db_setup_paging(db_simple_pager, arg,
220 db_lines_per_page / 2);
221 done++;
222 break;
223 case 'f':
210 case ' ':
211 /* Another page. */
212 db_setup_paging(db_simple_pager, arg,
224 case ' ':
225 /* Another page. */
226 db_setup_paging(db_simple_pager, arg,
213 DB_LINES_PER_PAGE);
214 return;
227 db_lines_per_page);
228 done++;
229 break;
215 case 'q':
216 case 'Q':
217 case 'x':
218 case 'X':
219 /* Quit */
220 if (arg != NULL) {
221 *(int *)arg = 1;
230 case 'q':
231 case 'Q':
232 case 'x':
233 case 'X':
234 /* Quit */
235 if (arg != NULL) {
236 *(int *)arg = 1;
222 db_printf("\n");
223 return;
237 done++;
238 break;
224 }
225#if 0
226 /* FALLTHROUGH */
227 default:
228 cnputc('\007');
229#endif
230 }
231 }
239 }
240#if 0
241 /* FALLTHROUGH */
242 default:
243 cnputc('\007');
244#endif
245 }
246 }
247 db_printf(" \r");
232}
233
234/*
235 * Return output position
236 */
237int
238db_print_position()
239{

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249
250/*
251 * Return output position
252 */
253int
254db_print_position()
255{

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