BasiliskII/src/prefs.cpp

/*
 *  prefs.cpp - Preferences handling
 *
 *  Basilisk II (C) 1997-2000 Christian Bauer
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>

#include "sysdeps.h"
#include "sys.h"
#include "prefs.h"


// Prefs items are stored in a linked list of these nodes
struct prefs_node {
        prefs_node *next;
        const char *name;
        prefs_type type;
        void *data;
};

// List of prefs nodes
static prefs_node *the_prefs;


/*
 *  Initialize preferences
 */

void PrefsInit(void)
{
        // Start with empty list
        the_prefs = NULL;

        // Set defaults
        AddPrefsDefaults();
        AddPlatformPrefsDefaults();

        // Load preferences from settings file
        LoadPrefs();
}


/*
 *  Deinitialize preferences
 */

void PrefsExit(void)
{
        // Free prefs list
        prefs_node *p = the_prefs, *next;
        while (p) {
                next = p->next;
                free((void *)p->name);
                free(p->data);
                delete p;
                p = next;
        }
}


/*
 *  Find preferences descriptor by keyword
 */

static const prefs_desc *find_prefs_desc(const char *name, const prefs_desc *list)
{
        while (list->type != TYPE_ANY) {
                if (strcmp(list->name, name) == 0)
                        return list;
                list++;
        }
        return NULL;
}


/*
 *  Set prefs items
 */

static void add_data(const char *name, prefs_type type, void *data, int size)
{
        void *d = malloc(size);
        if (d == NULL)
                return;
        memcpy(d, data, size);
        prefs_node *p = new prefs_node;
        p->next = 0;
        p->name = strdup(name);
        p->type = type;
        p->data = d;
        if (the_prefs) {
                prefs_node *prev = the_prefs;
                while (prev->next)
                        prev = prev->next;
                prev->next = p;
        } else
                the_prefs = p;
}

void PrefsAddString(const char *name, const char *s)
{
        add_data(name, TYPE_STRING, (void *)s, strlen(s) + 1);
}

void PrefsAddBool(const char *name, bool b)
{
        add_data(name, TYPE_BOOLEAN, &b, sizeof(bool));
}

void PrefsAddInt16(const char *name, int16 val)
{
        add_data(name, TYPE_INT16, &val, sizeof(int16));
}

void PrefsAddInt32(const char *name, int32 val)
{
        add_data(name, TYPE_INT32, &val, sizeof(int32));
}


/*
 *  Replace prefs items
 */

static prefs_node *find_node(const char *name, prefs_type type, int index = 0)
{
        prefs_node *p = the_prefs;
        int i = 0;
        while (p) {
                if ((type == TYPE_ANY || p->type == type) && !strcmp(p->name, name)) {
                        if (i == index)
                                return p;
                        else
                                i++;
                }
                p = p->next;
        }
        return NULL;
}

void PrefsReplaceString(const char *name, const char *s, int index)
{
        prefs_node *p = find_node(name, TYPE_STRING, index);
        if (p) {
                free(p->data);
                p->data = strdup(s);
        } else
                add_data(name, TYPE_STRING, (void *)s, strlen(s) + 1);
}

void PrefsReplaceBool(const char *name, bool b)
{
        prefs_node *p = find_node(name, TYPE_BOOLEAN);
        if (p)
                *(bool *)(p->data) = b;
        else
                add_data(name, TYPE_BOOLEAN, &b, sizeof(bool));
}

void PrefsReplaceInt16(const char *name, int16 val)
{
        prefs_node *p = find_node(name, TYPE_INT16);
        if (p)
                *(int16 *)(p->data) = val;
        else
                add_data(name, TYPE_INT16, &val, sizeof(int16));
}

void PrefsReplaceInt32(const char *name, int32 val)
{
        prefs_node *p = find_node(name, TYPE_INT32);
        if (p)
                *(int32 *)(p->data) = val;
        else
                add_data(name, TYPE_INT32, &val, sizeof(int32));
}


/*
 *  Get prefs items
 */

const char *PrefsFindString(const char *name, int index)
{
        prefs_node *p = find_node(name, TYPE_STRING, index);
        if (p)
                return (char *)(p->data);
        else
                return NULL;
}

bool PrefsFindBool(const char *name)
{
        prefs_node *p = find_node(name, TYPE_BOOLEAN, 0);
        if (p)
                return *(bool *)(p->data);
        else
                return false;
}

int16 PrefsFindInt16(const char *name)
{
        prefs_node *p = find_node(name, TYPE_INT16, 0);
        if (p)
                return *(int16 *)(p->data);
        else
                return 0;
}

int32 PrefsFindInt32(const char *name)
{
        prefs_node *p = find_node(name, TYPE_INT32, 0);
        if (p)
                return *(int32 *)(p->data);
        else
                return 0;
}


/*
 *  Remove prefs items
 */

void PrefsRemoveItem(const char *name, int index)
{
        prefs_node *p = find_node(name, TYPE_ANY, index);
        if (p) {
                free((void *)p->name);
                free(p->data);
                prefs_node *q = the_prefs;
                if (q == p) {
                        the_prefs = NULL;
                        delete p;
                        return;
                }
                while (q) {
                        if (q->next == p) {
                                q->next = p->next;
                                delete p;
                                return;
                        }
                        q = q->next;
                }
        }
}


/*
 *  Load prefs from stream (utility function for LoadPrefs() implementation)
 */

void LoadPrefsFromStream(FILE *f)
{
        char line[256];
        while(fgets(line, 255, f)) {
                // Read line
                int len = strlen(line);
                if (len == 0)
                        continue;
                line[len-1] = 0;

                // Comments begin with "#" or ";"
                if (line[0] == '#' || line[0] == ';')
                        continue;

                // Terminate string after keyword
                char *p = line;
                while (!isspace(*p)) p++;
                *p++ = 0;

                // Skip whitespace until value
                while (isspace(*p)) p++;
                char *keyword = line;
                char *value = p;
                int32 i = atol(value);

                // Look for keyword first in common item list, then in platform specific list
                const prefs_desc *desc = find_prefs_desc(keyword, common_prefs_items);
                if (desc == NULL)
                        desc = find_prefs_desc(keyword, platform_prefs_items);
                if (desc == NULL) {
                        printf("WARNING: Unknown preferences keyword '%s'\n", keyword);
                        continue;
                }

                // Add item to prefs
                switch (desc->type) {
                        case TYPE_STRING:
                                if (desc->multiple)
                                        PrefsAddString(keyword, value);
                                else
                                        PrefsReplaceString(keyword, value);
                                break;
                        case TYPE_BOOLEAN:
                                PrefsReplaceBool(keyword, !strcmp(value, "true"));
                                break;
                        case TYPE_INT16:
                                PrefsReplaceInt16(keyword, i);
                                break;
                        case TYPE_INT32:
                                PrefsReplaceInt32(keyword, i);
                                break;
                        default:
                                break;
                }
        }
}


/*
 *  Save settings to stream (utility function for SavePrefs() implementation)
 */

static void write_prefs(FILE *f, const prefs_desc *list)
{
        while (list->type != TYPE_ANY) {
                switch (list->type) {
                        case TYPE_STRING: {
                                int index = 0;
                                const char *str;
                                while ((str = PrefsFindString(list->name, index++)) != NULL)
                                        fprintf(f, "%s %s\n", list->name, str);
                                break;
                        }
                        case TYPE_BOOLEAN:
                                fprintf(f, "%s %s\n", list->name, PrefsFindBool(list->name) ? "true" : "false");
                                break;
                        case TYPE_INT16:
                                fprintf(f, "%s %d\n", list->name, PrefsFindInt16(list->name));
                                break;
                        case TYPE_INT32:
                                fprintf(f, "%s %d\n", list->name, PrefsFindInt32(list->name));
                                break;
                        default:
                                break;
                }
                list++;
        }
}

void SavePrefsToStream(FILE *f)
{
        write_prefs(f, common_prefs_items);
        write_prefs(f, platform_prefs_items);
}
Revision:	1.8
Committed:	2000-07-25T15:19:40Z (24 years, 4 months ago) by cebix
Branch:	MAIN
Changes since 1.7:	+2 -49 lines
Log Message:	- more cleanups - splitted prefs.cpp into prefs.cpp and prefs_items.cpp to make prefs.cpp reusable for other projects
#	User	Rev	Content
1	cebix	1.1	/*
2			* prefs.cpp - Preferences handling
3			*
4	cebix	1.4	* Basilisk II (C) 1997-2000 Christian Bauer
5	cebix	1.1	*
6			* This program is free software; you can redistribute it and/or modify
7			* it under the terms of the GNU General Public License as published by
8			* the Free Software Foundation; either version 2 of the License, or
9			* (at your option) any later version.
10			*
11			* This program is distributed in the hope that it will be useful,
12			* but WITHOUT ANY WARRANTY; without even the implied warranty of
13			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14			* GNU General Public License for more details.
15			*
16			* You should have received a copy of the GNU General Public License
17			* along with this program; if not, write to the Free Software
18			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19			*/
20
21			#include <string.h>
22			#include <stdlib.h>
23			#include <stdio.h>
24			#include <ctype.h>
25
26			#include "sysdeps.h"
27			#include "sys.h"
28			#include "prefs.h"
29
30
31	cebix	1.8	// Prefs items are stored in a linked list of these nodes
32	cebix	1.1	struct prefs_node {
33			prefs_node *next;
34			const char *name;
35			prefs_type type;
36			void *data;
37			};
38
39			// List of prefs nodes
40			static prefs_node *the_prefs;
41
42
43			/*
44			* Initialize preferences
45			*/
46
47			void PrefsInit(void)
48			{
49			// Start with empty list
50			the_prefs = NULL;
51
52			// Set defaults
53	cebix	1.8	AddPrefsDefaults();
54	cebix	1.1	AddPlatformPrefsDefaults();
55
56			// Load preferences from settings file
57			LoadPrefs();
58			}
59
60
61			/*
62			* Deinitialize preferences
63			*/
64
65			void PrefsExit(void)
66			{
67			// Free prefs list
68			prefs_node p = the_prefs, next;
69			while (p) {
70			next = p->next;
71			free((void *)p->name);
72			free(p->data);
73			delete p;
74			p = next;
75			}
76			}
77
78
79			/*
80			* Find preferences descriptor by keyword
81			*/
82
83			static const prefs_desc find_prefs_desc(const char name, const prefs_desc *list)
84			{
85			while (list->type != TYPE_ANY) {
86			if (strcmp(list->name, name) == 0)
87			return list;
88			list++;
89			}
90			return NULL;
91			}
92
93
94			/*
95			* Set prefs items
96			*/
97
98			static void add_data(const char name, prefs_type type, void data, int size)
99			{
100			void *d = malloc(size);
101			if (d == NULL)
102			return;
103			memcpy(d, data, size);
104			prefs_node *p = new prefs_node;
105			p->next = 0;
106			p->name = strdup(name);
107			p->type = type;
108			p->data = d;
109			if (the_prefs) {
110			prefs_node *prev = the_prefs;
111			while (prev->next)
112			prev = prev->next;
113			prev->next = p;
114			} else
115			the_prefs = p;
116			}
117
118			void PrefsAddString(const char name, const char s)
119			{
120			add_data(name, TYPE_STRING, (void *)s, strlen(s) + 1);
121			}
122
123			void PrefsAddBool(const char *name, bool b)
124			{
125			add_data(name, TYPE_BOOLEAN, &b, sizeof(bool));
126			}
127
128			void PrefsAddInt16(const char *name, int16 val)
129			{
130			add_data(name, TYPE_INT16, &val, sizeof(int16));
131			}
132
133			void PrefsAddInt32(const char *name, int32 val)
134			{
135			add_data(name, TYPE_INT32, &val, sizeof(int32));
136			}
137
138
139			/*
140			* Replace prefs items
141			*/
142
143			static prefs_node find_node(const char name, prefs_type type, int index = 0)
144			{
145			prefs_node *p = the_prefs;
146			int i = 0;
147			while (p) {
148			if ((type == TYPE_ANY \|\| p->type == type) && !strcmp(p->name, name)) {
149			if (i == index)
150			return p;
151			else
152			i++;
153			}
154			p = p->next;
155			}
156			return NULL;
157			}
158
159			void PrefsReplaceString(const char name, const char s, int index)
160			{
161			prefs_node *p = find_node(name, TYPE_STRING, index);
162			if (p) {
163			free(p->data);
164			p->data = strdup(s);
165			} else
166			add_data(name, TYPE_STRING, (void *)s, strlen(s) + 1);
167			}
168
169			void PrefsReplaceBool(const char *name, bool b)
170			{
171			prefs_node *p = find_node(name, TYPE_BOOLEAN);
172			if (p)
173			(bool )(p->data) = b;
174			else
175			add_data(name, TYPE_BOOLEAN, &b, sizeof(bool));
176			}
177
178			void PrefsReplaceInt16(const char *name, int16 val)
179			{
180			prefs_node *p = find_node(name, TYPE_INT16);
181			if (p)
182			(int16 )(p->data) = val;
183			else
184			add_data(name, TYPE_INT16, &val, sizeof(int16));
185			}
186
187			void PrefsReplaceInt32(const char *name, int32 val)
188			{
189			prefs_node *p = find_node(name, TYPE_INT32);
190			if (p)
191			(int32 )(p->data) = val;
192			else
193			add_data(name, TYPE_INT32, &val, sizeof(int32));
194			}
195
196
197			/*
198			* Get prefs items
199			*/
200
201			const char PrefsFindString(const char name, int index)
202			{
203			prefs_node *p = find_node(name, TYPE_STRING, index);
204			if (p)
205			return (char *)(p->data);
206			else
207			return NULL;
208			}
209
210			bool PrefsFindBool(const char *name)
211			{
212			prefs_node *p = find_node(name, TYPE_BOOLEAN, 0);
213			if (p)
214			return (bool )(p->data);
215			else
216			return false;
217			}
218
219			int16 PrefsFindInt16(const char *name)
220			{
221			prefs_node *p = find_node(name, TYPE_INT16, 0);
222			if (p)
223			return (int16 )(p->data);
224			else
225			return 0;
226			}
227
228			int32 PrefsFindInt32(const char *name)
229			{
230			prefs_node *p = find_node(name, TYPE_INT32, 0);
231			if (p)
232			return (int32 )(p->data);
233			else
234			return 0;
235			}
236
237
238			/*
239			* Remove prefs items
240			*/
241
242			void PrefsRemoveItem(const char *name, int index)
243			{
244			prefs_node *p = find_node(name, TYPE_ANY, index);
245			if (p) {
246			free((void *)p->name);
247			free(p->data);
248			prefs_node *q = the_prefs;
249			if (q == p) {
250			the_prefs = NULL;
251			delete p;
252			return;
253			}
254			while (q) {
255			if (q->next == p) {
256			q->next = p->next;
257			delete p;
258			return;
259			}
260			q = q->next;
261			}
262			}
263			}
264
265
266			/*
267			* Load prefs from stream (utility function for LoadPrefs() implementation)
268			*/
269
270			void LoadPrefsFromStream(FILE *f)
271			{
272			char line[256];
273			while(fgets(line, 255, f)) {
274			// Read line
275			int len = strlen(line);
276			if (len == 0)
277			continue;
278			line[len-1] = 0;
279
280			// Comments begin with "#" or ";"
281			if (line[0] == '#' \|\| line[0] == ';')
282			continue;
283
284			// Terminate string after keyword
285			char *p = line;
286			while (!isspace(*p)) p++;
287			*p++ = 0;
288
289			// Skip whitespace until value
290			while (isspace(*p)) p++;
291			char *keyword = line;
292			char *value = p;
293			int32 i = atol(value);
294
295			// Look for keyword first in common item list, then in platform specific list
296			const prefs_desc *desc = find_prefs_desc(keyword, common_prefs_items);
297			if (desc == NULL)
298			desc = find_prefs_desc(keyword, platform_prefs_items);
299			if (desc == NULL) {
300			printf("WARNING: Unknown preferences keyword '%s'\n", keyword);
301			continue;
302			}
303
304			// Add item to prefs
305			switch (desc->type) {
306			case TYPE_STRING:
307			if (desc->multiple)
308			PrefsAddString(keyword, value);
309			else
310			PrefsReplaceString(keyword, value);
311			break;
312			case TYPE_BOOLEAN:
313			PrefsReplaceBool(keyword, !strcmp(value, "true"));
314			break;
315			case TYPE_INT16:
316			PrefsReplaceInt16(keyword, i);
317			break;
318			case TYPE_INT32:
319			PrefsReplaceInt32(keyword, i);
320			break;
321			default:
322			break;
323			}
324			}
325			}
326
327
328			/*
329			* Save settings to stream (utility function for SavePrefs() implementation)
330			*/
331
332			static void write_prefs(FILE f, const prefs_desc list)
333			{
334			while (list->type != TYPE_ANY) {
335			switch (list->type) {
336			case TYPE_STRING: {
337			int index = 0;
338			const char *str;
339			while ((str = PrefsFindString(list->name, index++)) != NULL)
340			fprintf(f, "%s %s\n", list->name, str);
341			break;
342			}
343			case TYPE_BOOLEAN:
344			fprintf(f, "%s %s\n", list->name, PrefsFindBool(list->name) ? "true" : "false");
345			break;
346			case TYPE_INT16:
347			fprintf(f, "%s %d\n", list->name, PrefsFindInt16(list->name));
348			break;
349			case TYPE_INT32:
350	cebix	1.7	fprintf(f, "%s %d\n", list->name, PrefsFindInt32(list->name));
351	cebix	1.1	break;
352			default:
353			break;
354			}
355			list++;
356			}
357			}
358
359			void SavePrefsToStream(FILE *f)
360			{
361			write_prefs(f, common_prefs_items);
362			write_prefs(f, platform_prefs_items);
363			}