ermyth/src/flags.C

/*
 * flags.C: Functions to convert a flags table into a bitmask.
 *
 * Copyright © 2007 Pippijn van Steenhoven / The Ermyth Team
 * Rights to this code are as documented in COPYING.
 *
 *
 * Portions of this file were derived from sources bearing the following license:
 * Rights to this code are documented in doc/pod/license.pod.
 * Copyright © 2005-2007 Atheme Project (http://www.atheme.org)           
 */

static char const rcsid[] = "$Id: flags.C,v 1.6 2007-09-05 11:23:15 pippijn Exp $";

#include "atheme.h"
#include <account/chanacs.h>

#define FLAGS_ADD       0x1
#define FLAGS_DEL       0x2

unsigned int ca_all = CA_ALL_ALL;

static char flags_buf[128];

flags_table chanacs_flags[] = {
  { 'v', CA_VOICE      },
  { 'V', CA_AUTOVOICE  },
  { 'o', CA_OP         },
  { 'O', CA_AUTOOP     },
  { 't', CA_TOPIC      },
  { 's', CA_SET        },
  { 'r', CA_REMOVE     },
  { 'i', CA_INVITE     },
  { 'R', CA_RECOVER    },
  { 'f', CA_FLAGS      },
  { 'h', CA_HALFOP     },
  { 'H', CA_AUTOHALFOP },
  { 'A', CA_ACLVIEW    },
  { 'F', CA_FOUNDER    },
  { 'b', CA_AKICK      },
  { 0, 0 }
};

/* Construct bitmasks to be added and removed
 * Postcondition *addflags & *removeflags == 0
 * -- jilles */
void
flags_make_bitmasks (char const * const string, struct flags_table table[], unsigned int *addflags, unsigned int *removeflags)
{
  int status = FLAGS_ADD;
  char const *s = string;
  short i = 0;

  *addflags = *removeflags = 0;
  while (*s)
    {
      switch (*s)
        {
        case '+':
          status = FLAGS_ADD;
          break;

        case '-':
          status = FLAGS_DEL;
          break;

        case '=':
          *addflags = 0;
          *removeflags = 0xFFFFFFFF;
          status = FLAGS_ADD;
          break;

        case '*':
          if (status == FLAGS_ADD)
            {
              *addflags = 0xFFFFFFFF;
              *removeflags = 0;

              /* If this is chanacs_flags[], remove the ban flag. */
              if (table == chanacs_flags)
                {
                  *addflags &= ~CA_FOUNDER;
                  *removeflags |= CA_AKICK;
                }
            }
          else if (status == FLAGS_DEL)
            {
              *addflags = 0;
              *removeflags = 0xFFFFFFFF;
            }
          break;

        default:
          for (i = 0; table[i].flag; i++)
            if (table[i].flag == *s)
              {
                if (status == FLAGS_ADD)
                  {
                    *addflags |= table[i].value;
                    *removeflags &= ~table[i].value;
                  }
                else if (status == FLAGS_DEL)
                  {
                    *addflags &= ~table[i].value;
                    *removeflags |= table[i].value;
                  }
              }
        }

      (void) *s++;
    }

  return;
}

unsigned int
flags_to_bitmask (char const * const string, struct flags_table table[], unsigned int flags)
{
  int bitmask = (flags ? flags : 0x0);
  int status = FLAGS_ADD;
  char const *s = string;
  short i = 0;

  while (*s)
    {
      switch (*s)
        {
        case '+':
          status = FLAGS_ADD;
          break;

        case '-':
          status = FLAGS_DEL;
          break;

        case '=':
          bitmask = 0;
          status = FLAGS_ADD;
          break;

        case '*':
          if (status == FLAGS_ADD)
            {
              bitmask = 0xFFFFFFFF;

              /* If this is chanacs_flags[], do privs only */
              if (table == chanacs_flags)
                bitmask &= CA_ALLPRIVS & ca_all & ~CA_FOUNDER;
            }
          else if (status == FLAGS_DEL)
            bitmask = 0;
          break;

        default:
          for (i = 0; table[i].flag; i++)
            if (table[i].flag == *s)
              {
                if (status == FLAGS_ADD)
                  bitmask |= table[i].value;
                else if (status == FLAGS_DEL)
                  bitmask &= ~table[i].value;
              }
        }

      (void) *s++;
    }

  return bitmask;
}

char *
bitmask_to_flags (unsigned int flags, struct flags_table table[])
{
  char *bptr;
  short i = 0;

  bptr = flags_buf;

  *bptr++ = '+';

  for (i = 0; table[i].flag; i++)
    if (table[i].value & flags)
      *bptr++ = table[i].flag;

  *bptr++ = '\0';

  return flags_buf;
}

char *
bitmask_to_flags2 (unsigned int addflags, unsigned int removeflags, struct flags_table table[])
{
  char *bptr;
  short i = 0;

  bptr = flags_buf;

  if (removeflags)
    {
      *bptr++ = '-';
      for (i = 0; table[i].flag; i++)
        if (table[i].value & removeflags)
          *bptr++ = table[i].flag;
    }
  if (addflags)
    {
      *bptr++ = '+';
      for (i = 0; table[i].flag; i++)
        if (table[i].value & addflags)
          *bptr++ = table[i].flag;
    }

  *bptr++ = '\0';

  return flags_buf;
}

/* flags a non-founder with +f and these flags is allowed to set -- jilles */
unsigned int
allow_flags (unsigned int flags)
{
  flags &= ~CA_AKICK;
  if (flags & CA_REMOVE)
    flags |= CA_AKICK;
  if (flags & CA_OP)
    flags |= CA_AUTOOP;
  if (flags & CA_HALFOP)
    flags |= CA_AUTOHALFOP;
  if (flags & CA_VOICE)
    flags |= CA_AUTOVOICE;
  return flags;
}

void
update_chanacs_flags (void)
{
  ca_all = CA_ALL_ALL;
  if (!ircd->uses_halfops)
    ca_all &= ~(CA_HALFOP | CA_AUTOHALFOP);
}
Revision:	1.7
Committed:	Sun Sep 16 18:54:44 2007 UTC (16 years, 8 months ago) by pippijn
Content type:	text/plain
Branch:	MAIN
CVS Tags:	HEAD
Changes since 1.6:	+7 -2 lines
Log Message:	#defines to enum
#	User	Rev	Content
1	pippijn	1.1	/*
2			* flags.C: Functions to convert a flags table into a bitmask.
3	pippijn	1.7	*
4			* Copyright © 2007 Pippijn van Steenhoven / The Ermyth Team
5			* Rights to this code are as documented in COPYING.
6			*
7			*
8			* Portions of this file were derived from sources bearing the following license:
9	pippijn	1.2	* Rights to this code are documented in doc/pod/license.pod.
10	pippijn	1.4	* Copyright © 2005-2007 Atheme Project (http://www.atheme.org)
11	pippijn	1.1	*/
12
13	pippijn	1.7	static char const rcsid[] = "$Id: flags.C,v 1.6 2007-09-05 11:23:15 pippijn Exp $";
14	pippijn	1.1
15			#include "atheme.h"
16			#include <account/chanacs.h>
17
18			#define FLAGS_ADD 0x1
19			#define FLAGS_DEL 0x2
20
21			unsigned int ca_all = CA_ALL_ALL;
22
23			static char flags_buf[128];
24
25	pippijn	1.5	flags_table chanacs_flags[] = {
26			{ 'v', CA_VOICE },
27			{ 'V', CA_AUTOVOICE },
28			{ 'o', CA_OP },
29			{ 'O', CA_AUTOOP },
30			{ 't', CA_TOPIC },
31			{ 's', CA_SET },
32			{ 'r', CA_REMOVE },
33			{ 'i', CA_INVITE },
34			{ 'R', CA_RECOVER },
35			{ 'f', CA_FLAGS },
36			{ 'h', CA_HALFOP },
37			{ 'H', CA_AUTOHALFOP },
38			{ 'A', CA_ACLVIEW },
39			{ 'F', CA_FOUNDER },
40			{ 'b', CA_AKICK },
41			{ 0, 0 }
42	pippijn	1.1	};
43
44			/* Construct bitmasks to be added and removed
45			* Postcondition addflags & removeflags == 0
46			* -- jilles */
47			void
48	pippijn	1.4	flags_make_bitmasks (char const * const string, struct flags_table table[], unsigned int addflags, unsigned int removeflags)
49	pippijn	1.1	{
50			int status = FLAGS_ADD;
51	pippijn	1.4	char const *s = string;
52	pippijn	1.1	short i = 0;
53
54			addflags = removeflags = 0;
55	pippijn	1.4	while (*s)
56	pippijn	1.1	{
57	pippijn	1.4	switch (*s)
58	pippijn	1.1	{
59			case '+':
60			status = FLAGS_ADD;
61			break;
62
63			case '-':
64			status = FLAGS_DEL;
65			break;
66
67			case '=':
68			*addflags = 0;
69			*removeflags = 0xFFFFFFFF;
70			status = FLAGS_ADD;
71			break;
72
73			case '*':
74			if (status == FLAGS_ADD)
75			{
76			*addflags = 0xFFFFFFFF;
77			*removeflags = 0;
78
79			/* If this is chanacs_flags[], remove the ban flag. */
80			if (table == chanacs_flags)
81			{
82	pippijn	1.4	*addflags &= ~CA_FOUNDER;
83	pippijn	1.1	*removeflags \|= CA_AKICK;
84			}
85			}
86			else if (status == FLAGS_DEL)
87			{
88			*addflags = 0;
89			*removeflags = 0xFFFFFFFF;
90			}
91			break;
92
93			default:
94			for (i = 0; table[i].flag; i++)
95	pippijn	1.4	if (table[i].flag == *s)
96	pippijn	1.1	{
97			if (status == FLAGS_ADD)
98			{
99			*addflags \|= table[i].value;
100			*removeflags &= ~table[i].value;
101			}
102			else if (status == FLAGS_DEL)
103			{
104			*addflags &= ~table[i].value;
105			*removeflags \|= table[i].value;
106			}
107			}
108			}
109
110	pippijn	1.4	(void) *s++;
111	pippijn	1.1	}
112
113			return;
114			}
115
116			unsigned int
117	pippijn	1.4	flags_to_bitmask (char const * const string, struct flags_table table[], unsigned int flags)
118	pippijn	1.1	{
119			int bitmask = (flags ? flags : 0x0);
120			int status = FLAGS_ADD;
121	pippijn	1.4	char const *s = string;
122	pippijn	1.1	short i = 0;
123
124	pippijn	1.4	while (*s)
125	pippijn	1.1	{
126	pippijn	1.4	switch (*s)
127	pippijn	1.1	{
128			case '+':
129			status = FLAGS_ADD;
130			break;
131
132			case '-':
133			status = FLAGS_DEL;
134			break;
135
136			case '=':
137			bitmask = 0;
138			status = FLAGS_ADD;
139			break;
140
141			case '*':
142			if (status == FLAGS_ADD)
143			{
144			bitmask = 0xFFFFFFFF;
145
146			/* If this is chanacs_flags[], do privs only */
147			if (table == chanacs_flags)
148	pippijn	1.4	bitmask &= CA_ALLPRIVS & ca_all & ~CA_FOUNDER;
149	pippijn	1.1	}
150			else if (status == FLAGS_DEL)
151			bitmask = 0;
152			break;
153
154			default:
155			for (i = 0; table[i].flag; i++)
156	pippijn	1.4	if (table[i].flag == *s)
157	pippijn	1.1	{
158			if (status == FLAGS_ADD)
159			bitmask \|= table[i].value;
160			else if (status == FLAGS_DEL)
161			bitmask &= ~table[i].value;
162			}
163			}
164
165	pippijn	1.4	(void) *s++;
166	pippijn	1.1	}
167
168			return bitmask;
169			}
170
171			char *
172			bitmask_to_flags (unsigned int flags, struct flags_table table[])
173			{
174			char *bptr;
175			short i = 0;
176
177			bptr = flags_buf;
178
179			*bptr++ = '+';
180
181			for (i = 0; table[i].flag; i++)
182			if (table[i].value & flags)
183			*bptr++ = table[i].flag;
184
185			*bptr++ = '\0';
186
187			return flags_buf;
188			}
189
190			char *
191			bitmask_to_flags2 (unsigned int addflags, unsigned int removeflags, struct flags_table table[])
192			{
193			char *bptr;
194			short i = 0;
195
196			bptr = flags_buf;
197
198			if (removeflags)
199			{
200			*bptr++ = '-';
201			for (i = 0; table[i].flag; i++)
202			if (table[i].value & removeflags)
203			*bptr++ = table[i].flag;
204			}
205			if (addflags)
206			{
207			*bptr++ = '+';
208			for (i = 0; table[i].flag; i++)
209			if (table[i].value & addflags)
210			*bptr++ = table[i].flag;
211			}
212
213			*bptr++ = '\0';
214
215			return flags_buf;
216			}
217
218			/* flags a non-founder with +f and these flags is allowed to set -- jilles */
219			unsigned int
220			allow_flags (unsigned int flags)
221			{
222			flags &= ~CA_AKICK;
223			if (flags & CA_REMOVE)
224			flags \|= CA_AKICK;
225			if (flags & CA_OP)
226			flags \|= CA_AUTOOP;
227			if (flags & CA_HALFOP)
228			flags \|= CA_AUTOHALFOP;
229			if (flags & CA_VOICE)
230			flags \|= CA_AUTOVOICE;
231			return flags;
232			}
233
234			void
235			update_chanacs_flags (void)
236			{
237			ca_all = CA_ALL_ALL;
238			if (!ircd->uses_halfops)
239			ca_all &= ~(CA_HALFOP \| CA_AUTOHALFOP);
240			}