/[gxemul]/trunk/src/settings.c
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Revision 42 - (show annotations)
Mon Oct 8 16:22:32 2007 UTC (11 years, 9 months ago) by dpavlin
File MIME type: text/plain
File size: 14281 byte(s)
++ trunk/HISTORY	(local)
$Id: HISTORY,v 1.1613 2007/06/15 20:11:26 debug Exp $
20070501	Continuing a little on m88k disassembly (control registers,
		more instructions).
		Adding a dummy mvme88k machine mode.
20070502	Re-adding MIPS load/store alignment exceptions.
20070503	Implementing more of the M88K disassembly code.
20070504	Adding disassembly of some more M88K load/store instructions.
		Implementing some relatively simple M88K instructions (br.n,
		xor[.u] imm, and[.u] imm).
20070505	Implementing M88K three-register and, or, xor, and jmp[.n],
		bsr[.n] including function call trace stuff.
		Applying a patch from Bruce M. Simpson which implements the
		SYSCON_BOARD_CPU_CLOCK_FREQ_ID object of the syscon call in
		the yamon PROM emulation.
20070506	Implementing M88K bb0[.n] and bb1[.n], and skeletons for
		ldcr and stcr (although no control regs are implemented yet).
20070509	Found and fixed the bug which caused Linux for QEMU_MIPS to
		stop working in 0.4.5.1: It was a faulty change to the MIPS
		'sc' and 'scd' instructions I made while going through gcc -W
		warnings on 20070428.
20070510	Updating the Linux/QEMU_MIPS section in guestoses.html to
		use mips-test-0.2.tar.gz instead of 0.1.
		A big thank you to Miod Vallat for sending me M88K manuals.
		Implementing more M88K instructions (addu, subu, div[u], mulu,
		ext[u], clr, set, cmp).
20070511	Fixing bugs in the M88K "and" and "and.u" instructions (found
		by comparing against the manual).
		Implementing more M88K instructions (mask[.u], mak, bcnd (auto-
		generated)) and some more control register details.
		Cleanup: Removing the experimental AVR emulation mode and
		corresponding devices; AVR emulation wasn't really meaningful.
		Implementing autogeneration of most M88K loads/stores. The
		rectangle drawing demo (with -O0) for M88K runs :-)
		Beginning on M88K exception handling.
		More M88K instructions: tb0, tb1, rte, sub, jsr[.n].
		Adding some skeleton MVME PROM ("BUG") emulation.
20070512	Fixing a bug in the M88K cmp instruction.
		Adding the M88K lda (scaled register) instruction.
		Fixing bugs in 64-bit (32-bit pairs) M88K loads/stores.
		Removing the unused tick_hz stuff from the machine struct.
		Implementing the M88K xmem instruction. OpenBSD/mvme88k gets
		far enough to display the Copyright banner :-)
		Implementing subu.co (guess), addu.co, addu.ci, ff0, and ff1.
		Adding a dev_mvme187, for MVME187-specific devices/registers.
		OpenBSD/mvme88k prints more boot messages. :)
20070515	Continuing on MVME187 emulation (adding more devices, beginning
		on the CMMUs, etc).
		Adding the M88K and.c, xor.c, and or.c instructions, and making
		sure that mul, div, etc cause exceptions if executed when SFD1
		is disabled.
20070517	Continuing on M88K and MVME187 emulation in general; moving
		the CMMU registers to the CPU struct, separating dev_pcc2 from
		dev_mvme187, and beginning on memory_m88k.c (BATC and PATC).
		Fixing a bug in 64-bit (32-bit pairs) M88K fast stores.
		Implementing the clock part of dev_mk48txx.
		Implementing the M88K fstcr and xcr instructions.
		Implementing m88k_cpu_tlbdump().
		Beginning on the implementation of a separate address space
		for M88K .usr loads/stores.
20070520	Removing the non-working (skeleton) Sandpoint, SonyNEWS, SHARK
		Dnard, and Zaurus machine modes.
		Experimenting with dyntrans to_be_translated read-ahead. It
		seems to give a very small performance increase for MIPS
		emulation, but a large performance degradation for SuperH. Hm.
20070522	Disabling correct SuperH ITLB emulation; it does not seem to be
		necessary in order to let SH4 guest OSes run, and it slows down
		userspace code.
		Implementing "samepage" branches for SuperH emulation, and some
		other minor speed hacks.
20070525	Continuing on M88K memory-related stuff: exceptions, memory
		transaction register contents, etc.
		Implementing the M88K subu.ci instruction.
		Removing the non-working (skeleton) Iyonix machine mode.
		OpenBSD/mvme88k reaches userland :-), starts executing
		/sbin/init's instructions, and issues a few syscalls, before
		crashing.
20070526	Fixing bugs in dev_mk48txx, so that OpenBSD/mvme88k detects
		the correct time-of-day.
		Implementing a generic IRQ controller for the test machines
		(dev_irqc), similar to a proposed patch from Petr Stepan.
		Experimenting some more with translation read-ahead.
		Adding an "expect" script for automated OpenBSD/landisk
		install regression/performance tests.
20070527	Adding a dummy mmEye (SH3) machine mode skeleton.
		FINALLY found the strange M88K bug I have been hunting: I had
		not emulated the SNIP value for exceptions occurring in
		branch delay slots correctly.
		Implementing correct exceptions for 64-bit M88K loads/stores.
		Address to symbol lookups are now disabled when M88K is
		running in usermode (because usermode addresses don't have
		anything to do with supervisor addresses).
20070531	Removing the mmEye machine mode skeleton.
20070604	Some minor code cleanup.
20070605	Moving src/useremul.c into a subdir (src/useremul/), and
		cleaning up some more legacy constructs.
		Adding -Wstrict-aliasing and -fstrict-aliasing detection to
		the configure script.
20070606	Adding a check for broken GCC on Solaris to the configure
		script. (GCC 3.4.3 on Solaris cannot handle static variables
		which are initialized to 0 or NULL. :-/)
		Removing the old (non-working) ARC emulation modes: NEC RD94,
		R94, R96, and R98, and the last traces of Olivetti M700 and
		Deskstation Tyne.
		Removing the non-working skeleton WDSC device (dev_wdsc).
20070607	Thinking about how to use the host's cc + ld at runtime to
		generate native code. (See experiments/native_cc_ld_test.i
		for an example.)
20070608	Adding a program counter sampling timer, which could be useful
		for native code generation experiments.
		The KN02_CSR_NRMMOD bit in the DECstation 5000/200 (KN02) CSR
		should always be set, to allow a 5000/200 PROM to boot.
20070609	Moving out breakpoint details from the machine struct into
		a helper struct, and removing the limit on max nr of
		breakpoints.
20070610	Moving out tick functions into a helper struct as well (which
		also gets rid of the max limit).
20070612	FINALLY figured out why Debian/DECstation stopped working when
		translation read-ahead was enabled: in src/memory_rw.c, the
		call to invalidate_code_translation was made also if the
		memory access was an instruction load (if the page was mapped
		as writable); it shouldn't be called in that case.
20070613	Implementing some more MIPS32/64 revision 2 instructions: di,
		ei, ext, dext, dextm, dextu, and ins.
20070614	Implementing an instruction combination for the NetBSD/arm
		idle loop (making the host not use any cpu if NetBSD/arm
		inside the emulator is not using any cpu).
		Increasing the nr of ARM VPH entries from 128 to 384.
20070615	Removing the ENABLE_arch stuff from the configure script, so
		that all included architectures are included in both release
		and development builds.
		Moving memory related helper functions from misc.c to memory.c.
		Adding preliminary instructions for netbooting NetBSD/pmppc to
		guestoses.html; it doesn't work yet, there are weird timeouts.
		Beginning a total rewrite of the userland emulation modes
		(removing all emulation modes, beginning from scratch with
		NetBSD/MIPS and FreeBSD/Alpha only).
20070616	After fixing a bug in the DEC21143 NIC (the TDSTAT_OWN bit was
		only cleared for the last segment when transmitting, not all
		segments), NetBSD/pmppc boots with root-on-nfs without the
		timeouts. Updating guestoses.html.
		Removing the skeleton PSP (Playstation Portable) mode.
		Moving X11-related stuff in the machine struct into a helper
		struct.
		Cleanup of out-of-memory checks, to use a new CHECK_ALLOCATION
		macro (which prints a meaningful error message).
		Adding a COMMENT to each machine and device (for automagic
		.index comment generation).
		Doing regression testing for the next release.

==============  RELEASE 0.4.6  ==============


1 /*
2 * Copyright (C) 2006-2007 Anders Gavare. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are met:
6 *
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * 3. The name of the author may not be used to endorse or promote products
13 * derived from this software without specific prior written permission.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
27 *
28 * $Id: settings.c,v 1.16 2007/06/15 17:02:38 debug Exp $
29 *
30 * A generic settings object. (This module should be 100% indepedent of GXemul
31 * and hence easily reusable.) It is basically a tree structure of nodes,
32 * where each node has a name and a few properties. The main property is
33 * a pointer, which can either point to other settings ("sub-settings"),
34 * or to a variable in memory.
35 *
36 * Appart from the pointer, the other properties are a definition of the
37 * type being pointed to (int, int32_t, int64_t, char*, etc), how it should be
38 * presented (e.g. it may be an int value in memory, but it should be
39 * presented as a boolean "true/false" value), and a flag which tells us
40 * whether the setting is directly writable or not.
41 *
42 * If UNSTABLE_DEVEL is defined, then warnings are printed when
43 * settings_destroy() is called if individual settings have not yet been
44 * deleted. (This is to help making sure that code which uses the settings
45 * subsystem correctly un-initializes stuff.)
46 */
47
48 #include <stdio.h>
49 #include <stdlib.h>
50 #include <string.h>
51
52 /* Including misc.h should ONLY be necessary to work around the fact that
53 many systems don't have PRIx64 etc defined. */
54 #include "misc.h"
55
56 #include "settings.h"
57
58
59 struct settings {
60 struct settings *parent;
61 char *name_in_parent;
62
63 int n_settings;
64
65 /*
66 * Each setting has a name, a writable flag, a storage type, a
67 * presentation format, and a pointer.
68 *
69 * For subsettings, the pointer points to the subsettings object;
70 * for other settings, the pointer points to a variable.
71 *
72 * These pointers point to simple linear arrays, containing n_settings
73 * entries each.
74 */
75
76 char **name;
77 int *writable;
78 int *storage_type;
79 int *presentation_format;
80 void **ptr;
81 };
82
83
84 /*
85 * settings_new():
86 *
87 * Create a new settings object. Return value is a pointer to the newly
88 * created object. The function does not return on failure.
89 */
90 struct settings *settings_new(void)
91 {
92 struct settings *settings;
93
94 CHECK_ALLOCATION(settings = malloc(sizeof(struct settings)));
95 memset(settings, 0, sizeof(struct settings));
96
97 return settings;
98 }
99
100
101 /*
102 * settings_destroy():
103 *
104 * Frees all resources occupied by a settings object. Also, if this settings
105 * object has a parent, then remove it from the parent.
106 */
107 void settings_destroy(struct settings *settings)
108 {
109 int i;
110
111 if (settings == NULL) {
112 fprintf(stderr, "settings_destroy(): internal error, "
113 "settings = NULL!\n");
114 exit(1);
115 }
116
117 #ifdef UNSTABLE_DEVEL
118 if (settings->n_settings > 0)
119 printf("settings_destroy(): there are remaining settings!\n");
120 #endif
121
122 if (settings->name != NULL) {
123 for (i=0; i<settings->n_settings; i++) {
124 if (settings->name[i] != NULL) {
125 #ifdef UNSTABLE_DEVEL
126 printf("settings_destroy(): setting '%s'"
127 " was not properly deleted before "
128 "exiting!\n", settings->name[i]);
129 #endif
130 free(settings->name[i]);
131 }
132 }
133
134 free(settings->name);
135 } else if (settings->n_settings != 0) {
136 fprintf(stderr, "settings_destroy(): internal error, "
137 "settings->name = NULL, but there were settings?"
138 " (n_settings = %i)\n", settings->n_settings);
139 exit(1);
140 }
141
142 if (settings->writable != NULL)
143 free(settings->writable);
144
145 if (settings->storage_type != NULL)
146 free(settings->storage_type);
147
148 if (settings->presentation_format != NULL)
149 free(settings->presentation_format);
150
151 if (settings->ptr != NULL)
152 free(settings->ptr);
153
154 if (settings->parent != NULL) {
155 settings_remove(settings->parent, settings->name_in_parent);
156 free(settings->name_in_parent);
157 }
158
159 free(settings);
160 }
161
162
163 /*
164 * settings_read():
165 *
166 * Used internally by settings_access() and settings_debugdump().
167 */
168 static int settings_read(struct settings *settings, int i, uint64_t *valuep)
169 {
170 *valuep = 0;
171
172 switch (settings->storage_type[i]) {
173 case SETTINGS_TYPE_INT:
174 *valuep = *((int *) settings->ptr[i]);
175 break;
176 case SETTINGS_TYPE_INT8:
177 *valuep = *((int8_t *) settings->ptr[i]);
178 break;
179 case SETTINGS_TYPE_INT16:
180 *valuep = *((int16_t *) settings->ptr[i]);
181 break;
182 case SETTINGS_TYPE_INT32:
183 *valuep = *((int32_t *) settings->ptr[i]);
184 break;
185 case SETTINGS_TYPE_INT64:
186 *valuep = *((int64_t *) settings->ptr[i]);
187 break;
188 case SETTINGS_TYPE_UINT:
189 *valuep = *((uint *) settings->ptr[i]);
190 break;
191 case SETTINGS_TYPE_UINT8:
192 *valuep = *((uint8_t *) settings->ptr[i]);
193 break;
194 case SETTINGS_TYPE_UINT16:
195 *valuep = *((uint16_t *) settings->ptr[i]);
196 break;
197 case SETTINGS_TYPE_UINT32:
198 *valuep = *((uint32_t *) settings->ptr[i]);
199 break;
200 case SETTINGS_TYPE_UINT64:
201 *valuep = *((uint64_t *) settings->ptr[i]);
202 break;
203 case SETTINGS_TYPE_STRING:
204 /* Note: Strings cannot be read like this. */
205 break;
206 default:printf("settings_read(): FATAL ERROR! Unknown storage type"
207 ": %i\n", settings->storage_type[i]);
208 exit(1);
209 }
210
211 return SETTINGS_OK;
212 }
213
214
215 /*
216 * settings_write():
217 *
218 * Used internally by settings_access().
219 */
220 static int settings_write(struct settings *settings, int i, uint64_t *valuep)
221 {
222 if (!settings->writable[i])
223 return SETTINGS_READONLY;
224
225 switch (settings->storage_type[i]) {
226 case SETTINGS_TYPE_INT:
227 case SETTINGS_TYPE_UINT:
228 *((int *) settings->ptr[i]) = *valuep;
229 break;
230 case SETTINGS_TYPE_INT8:
231 case SETTINGS_TYPE_UINT8:
232 *((int8_t *) settings->ptr[i]) = *valuep;
233 break;
234 case SETTINGS_TYPE_INT16:
235 case SETTINGS_TYPE_UINT16:
236 *((int16_t *) settings->ptr[i]) = *valuep;
237 break;
238 case SETTINGS_TYPE_INT32:
239 case SETTINGS_TYPE_UINT32:
240 *((int32_t *) settings->ptr[i]) = *valuep;
241 break;
242 case SETTINGS_TYPE_INT64:
243 case SETTINGS_TYPE_UINT64:
244 *((int64_t *) settings->ptr[i]) = *valuep;
245 break;
246 case SETTINGS_TYPE_STRING:
247 /* Note: Strings cannot be read like this. */
248 printf("settings_write(): ERROR! Strings cannot be "
249 "written like this.\n");
250 break;
251 default:printf("settings_read(): FATAL ERROR! Unknown storage type"
252 ": %i\n", settings->storage_type[i]);
253 exit(1);
254 }
255
256 return SETTINGS_OK;
257 }
258
259
260 /*
261 * settings_debugdump():
262 *
263 * Dump settings in a settings object to stdout.
264 * If recurse is non-zero, all subsetting objects are also dumped.
265 */
266 void settings_debugdump(struct settings *settings, const char *prefix,
267 int recurse)
268 {
269 size_t name_buflen = strlen(prefix) + 100;
270 char *name;
271 int i;
272 uint64_t value = 0;
273
274 CHECK_ALLOCATION(name = malloc(name_buflen));
275
276 for (i=0; i<settings->n_settings; i++) {
277 snprintf(name, name_buflen, "%s.%s", prefix, settings->name[i]);
278
279 if (settings->storage_type[i] == SETTINGS_TYPE_SUBSETTINGS) {
280 /* Subsettings: */
281 if (recurse)
282 settings_debugdump(settings->ptr[i], name, 1);
283 } else {
284 /* Normal value: */
285 printf("%s = ", name);
286
287 settings_read(settings, i, &value);
288
289 switch (settings->presentation_format[i]) {
290 case SETTINGS_FORMAT_DECIMAL:
291 printf("%"PRIi64, value);
292 break;
293 case SETTINGS_FORMAT_HEX8:
294 printf("0x%02"PRIx8, (int8_t) value);
295 break;
296 case SETTINGS_FORMAT_HEX16:
297 printf("0x%04"PRIx16, (int16_t) value);
298 break;
299 case SETTINGS_FORMAT_HEX32:
300 printf("0x%08"PRIx32, (int32_t) value);
301 break;
302 case SETTINGS_FORMAT_HEX64:
303 printf("0x%016"PRIx64, (int64_t) value);
304 break;
305 case SETTINGS_FORMAT_BOOL:
306 printf(value? "true" : "false");
307 break;
308 case SETTINGS_FORMAT_YESNO:
309 printf(value? "yes" : "no");
310 break;
311 case SETTINGS_FORMAT_STRING:
312 printf("\"%s\"", *((char **)settings->ptr[i]));
313 break;
314 default:printf("FATAL ERROR! Unknown presentation "
315 "format: %i\n",
316 settings->presentation_format[i]);
317 exit(1);
318 }
319
320 if (!settings->writable[i])
321 printf(" (R/O)");
322
323 printf("\n");
324 }
325 }
326
327 free(name);
328 }
329
330
331 /*
332 * settings_add():
333 *
334 * Add a setting to a settings object.
335 */
336 void settings_add(struct settings *settings, const char *name, int writable,
337 int type, int format, void *ptr)
338 {
339 int i;
340
341 for (i=0; i<settings->n_settings; i++) {
342 if (strcmp(settings->name[i], name) == 0)
343 break;
344 }
345
346 if (i < settings->n_settings) {
347 fprintf(stderr, "settings_add(): name '%s' is already"
348 " in use\n", name);
349 exit(1);
350 }
351
352 settings->n_settings ++;
353
354 CHECK_ALLOCATION(settings->name = realloc(settings->name,
355 settings->n_settings * sizeof(char *)));
356 CHECK_ALLOCATION(settings->writable = realloc(settings->writable,
357 settings->n_settings * sizeof(int)));
358 CHECK_ALLOCATION(settings->storage_type = realloc(
359 settings->storage_type, settings->n_settings * sizeof(int)));
360 CHECK_ALLOCATION(settings->presentation_format = realloc(settings->
361 presentation_format, settings->n_settings * sizeof(int)));
362 CHECK_ALLOCATION(settings->ptr = realloc(settings->ptr,
363 settings->n_settings * sizeof(void *)));
364
365 CHECK_ALLOCATION(settings->name[settings->n_settings - 1] =
366 strdup(name));
367 settings->writable[settings->n_settings - 1] = writable;
368 settings->storage_type[settings->n_settings - 1] = type;
369 settings->presentation_format[settings->n_settings - 1] = format;
370 settings->ptr[settings->n_settings - 1] = ptr;
371
372 if (type == SETTINGS_TYPE_SUBSETTINGS) {
373 ((struct settings *)ptr)->parent = settings;
374 CHECK_ALLOCATION( ((struct settings *)ptr)->name_in_parent =
375 strdup(name) );
376 }
377 }
378
379
380 /*
381 * settings_remove():
382 *
383 * Remove a setting from a settings object.
384 */
385 void settings_remove(struct settings *settings, const char *name)
386 {
387 int i, m;
388
389 for (i=0; i<settings->n_settings; i++) {
390 if (strcmp(settings->name[i], name) == 0)
391 break;
392 }
393
394 if (i >= settings->n_settings) {
395 #ifdef UNSTABLE_DEVEL
396 fprintf(stderr, "settings_remove(): attempting to remove"
397 " non-existant setting '%s'\n", name);
398 #endif
399 return;
400 }
401
402 /* Check subsettings specifically: */
403 if (settings->storage_type[i] == SETTINGS_TYPE_SUBSETTINGS &&
404 settings->ptr[i] != NULL) {
405 struct settings *subsettings = settings->ptr[i];
406 if (subsettings->n_settings != 0) {
407 fprintf(stderr, "settings_remove(): attempting to "
408 "remove non-emtpy setting '%s'\n", name);
409 fprintf(stderr, "Remaining settings are:\n");
410 for (i=0; i<subsettings->n_settings; i++)
411 fprintf(stderr, "\t%s\n", subsettings->name[i]);
412 exit(1);
413 }
414 }
415
416 settings->n_settings --;
417 free(settings->name[i]);
418
419 m = settings->n_settings - i;
420 if (m == 0)
421 return;
422
423 memmove(&settings->name[i], &settings->name[i+1],
424 m * sizeof(settings->name[0]));
425 memmove(&settings->writable[i], &settings->writable[i+1],
426 m * sizeof(settings->writable[0]));
427 memmove(&settings->storage_type[i], &settings->storage_type[i+1],
428 m * sizeof(settings->storage_type[0]));
429 memmove(&settings->presentation_format[i],
430 &settings->presentation_format[i+1],
431 m * sizeof(settings->presentation_format[0]));
432 memmove(&settings->ptr[i], &settings->ptr[i+1],
433 m * sizeof(settings->ptr[0]));
434 }
435
436
437 /*
438 * settings_remove_all():
439 *
440 * Remove all (level-1) settings from a settings object. By level-1, I mean
441 * all settings that do not contain subsettings.
442 */
443 void settings_remove_all(struct settings *settings)
444 {
445 while (settings->n_settings > 0)
446 settings_remove(settings, settings->name[0]);
447 }
448
449
450 /*
451 * settings_access():
452 *
453 * Read or write a setting. fullname may be something like "settings.x.y".
454 * When writing a value, valuebuf should point to a uint64_t containing the
455 * new value (note: always a uint64_t). When reading a value, valuebuf should
456 * point to a uint64_t where the value will be stored.
457 *
458 * The return value is one of the following:
459 *
460 * SETTINGS_OK
461 * The value was read or written.
462 *
463 * SETTINGS_NAME_NOT_FOUND
464 * The name was not found in the settings object.
465 *
466 * SETTINGS_READONLY
467 * The name was found, but it was marked as read-only, and
468 * an attempt was made to write to it.
469 */
470 int settings_access(struct settings *settings, const char *fullname,
471 int writeflag, uint64_t *valuep)
472 {
473 int i;
474
475 /* printf("settings_access(fullname='%s')\n", fullname); */
476
477 if (strncmp(fullname, GLOBAL_SETTINGS_NAME".",
478 strlen(GLOBAL_SETTINGS_NAME) + 1) == 0)
479 fullname += strlen(GLOBAL_SETTINGS_NAME) + 1;
480
481 for (i=0; i<settings->n_settings; i++) {
482 size_t settings_name_len = strlen(settings->name[i]);
483
484 if (strncmp(fullname, settings->name[i],
485 settings_name_len) != 0)
486 continue;
487
488 /* Found the correct setting? */
489 if (fullname[settings_name_len] == '\0') {
490 if (writeflag)
491 return settings_write(settings, i, valuep);
492 else
493 return settings_read(settings, i, valuep);
494 }
495
496 /* Found a setting which has sub-settings? */
497 if (fullname[settings_name_len] == '.') {
498 /* Recursive search: */
499 return settings_access(
500 (struct settings *)settings->ptr[i],
501 fullname + settings_name_len + 1,
502 writeflag, valuep);
503 }
504 }
505
506 return SETTINGS_NAME_NOT_FOUND;
507 }
508

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