ermyth/src/string.C

/*
 * Copyright © 2005 Atheme Development Group
 * Rights to this code are documented in doc/pod/license.pod.
 *
 * String functions.
 */

static char const rcsid[] = "$Id: string.C,v 1.3 2007-07-21 13:23:22 pippijn Exp $";

#include "atheme.h"

char *
sstrdup (char const * const s)
{
  char *t;
  size_t len;

  if (s == NULL)
    return NULL;

  t = alloc<char> (len = strlen (s) + 1);

  strlcpy (t, s, len);
  return t;
}

char *
sstrndup (char const *s, int len)
{
  char *t;

  if (s == NULL)
    return NULL;

  t = alloc<char> (len + 1);

  strlcpy (t, s, len);
  return t;
}

void
assign (char *dst, char const *src, size_t maxlen)
{
  if (!src)
    src = "";

  size_t len = strlen (src);

  if (len >= maxlen - 1)
    {
      if (maxlen <= 4)
        {
          memset (dst, '.', maxlen - 1);
          dst [maxlen - 1] = 0;
        }
      else
        {
          memcpy (dst, src, maxlen - 4);
          memcpy (dst + maxlen - 4, "...", 4);
        }
    }
  else
    memcpy (dst, src, len + 1);
}

#ifndef HAVE_STRLCAT
/* These functions are taken from Linux. */
size_t
strlcat (char *dest, char const *src, size_t count)
{
  size_t dsize = strlen (dest);
  size_t len = strlen (src);
  size_t res = dsize + len;

  dest += dsize;
  count -= dsize;
  if (len >= count)
    len = count - 1;
  memcpy (dest, src, len);
  dest[len] = 0;
  return res;
}
#endif

#ifndef HAVE_STRLCPY
size_t
strlcpy (char *dest, char const *src, size_t size)
{
  size_t ret = strlen (src);

  if (size)
    {
      size_t len = (ret >= size) ? size - 1 : ret;
      memcpy (dest, src, len);
      dest[len] = '\0';
    }
  return ret;
}
#endif

/* removes unwanted chars from a line */
char const *
strip (char *line)
{
  char *c = 0;

  if (line)
    {
      if ((c = strchr (line, '\n')))
        *c = '\0';
      if ((c = strchr (line, '\r')))
        *c = '\0';
      if ((c = strchr (line, '\1')))
        *c = '\0';
    }

  return c;
}

int
dynstr::append (char c)
{
  if (size - pos <= 1)
    {
      size_t new_size = std::max (size * 2, pos + 9);
      size = new_size;
      m_rep = new char[new_size];
    }
  m_rep[pos] = c;
  m_rep[++pos] = '\0';

  return size;
}

int
dynstr::append_nonul (char c)
{
  if (size - pos <= 1)
    {
      size_t new_size = std::max (size * 2, pos + 9);
      size = new_size;
      m_rep = new char[new_size];
    }
  m_rep[pos++] = c;

  return size;
}

int
dynstr::append (char const *src, size_t len)
{
  if (size - pos <= len)
    {
      size_t new_size = std::max (size * 2, pos + len + 8);
      size = new_size;
      m_rep = new char[new_size];
    }
  memcpy (m_rep + pos, src, len);
  pos += len;
  m_rep[pos] = '\0';

  return len;
}

int
dynstr::append_nonul (char const *src, size_t len)
{
  if (size - pos <= len)
    {
      size_t new_size = std::max (size * 2, pos + len + 8);
      size = new_size;
      m_rep = new char[new_size];
    }
  memcpy (m_rep + pos, src, len);
  pos += len;

  return len;
}

int
dynstr::append_unguarded (char c)
{
  m_rep[pos] = c;
  m_rep[++pos] = '\0';

  return size;
}

int
dynstr::append_unguarded_nonul (char c)
{
  m_rep[pos++] = c;

  return size;
}

int
dynstr::append_unguarded (char const *src, size_t len)
{
  memcpy (m_rep + pos, src, len);
  pos += len;
  m_rep[pos] = '\0';

  return len;
}

int
dynstr::append_unguarded_nonul (char const *src, size_t len)
{
  memcpy (m_rep + pos, src, len);
  pos += len;

  return len;
}
Revision:	1.4
Committed:	Tue Aug 28 17:08:12 2007 UTC (16 years, 9 months ago) by pippijn
Content type:	text/plain
Branch:	MAIN
Changes since 1.3:	+56 -29 lines
Log Message:	- changed name - updated the example config to the new system - added more documentation - enhanced documentation generators - added a link to the pdf to the website - added an RSS feed generator - transitioned hooks to c++ callbacks - did various merges with upstream along the way - added const where appropriate - removed the old block allocator - fixed most memory leaks - transitioned some dictionaries to std::map - transitioned some lists to std::vector - made some free functions members where appropriate - renamed string to dynstr and added a static string ststr - use NOW instead of time (NULL) if possible - completely reworked database backends, crypto handlers and protocol handlers to use an object factory - removed the old module system. ermyth does not do any dynamic loading anymore - fixed most of the build system - reworked how protocol commands work
#	User	Rev	Content
1	pippijn	1.1	/*
2			* Copyright © 2005 Atheme Development Group
3	pippijn	1.2	* Rights to this code are documented in doc/pod/license.pod.
4	pippijn	1.1	*
5			* String functions.
6			*/
7
8	pippijn	1.4	static char const rcsid[] = "$Id: string.C,v 1.3 2007-07-21 13:23:22 pippijn Exp $";
9	pippijn	1.1
10	pippijn	1.4	#include "atheme.h"
11
12			char *
13			sstrdup (char const * const s)
14			{
15			char *t;
16			size_t len;
17
18			if (s == NULL)
19			return NULL;
20
21			t = alloc<char> (len = strlen (s) + 1);
22
23			strlcpy (t, s, len);
24			return t;
25			}
26
27			char *
28			sstrndup (char const *s, int len)
29			{
30			char *t;
31
32			if (s == NULL)
33			return NULL;
34	pippijn	1.1
35	pippijn	1.4	t = alloc<char> (len + 1);
36
37			strlcpy (t, s, len);
38			return t;
39			}
40	pippijn	1.1
41			void
42			assign (char dst, char const src, size_t maxlen)
43			{
44			if (!src)
45			src = "";
46
47			size_t len = strlen (src);
48
49			if (len >= maxlen - 1)
50			{
51			if (maxlen <= 4)
52			{
53			memset (dst, '.', maxlen - 1);
54			dst [maxlen - 1] = 0;
55			}
56			else
57			{
58			memcpy (dst, src, maxlen - 4);
59			memcpy (dst + maxlen - 4, "...", 4);
60			}
61			}
62			else
63			memcpy (dst, src, len + 1);
64			}
65
66			#ifndef HAVE_STRLCAT
67			/* These functions are taken from Linux. */
68			size_t
69			strlcat (char dest, char const src, size_t count)
70			{
71			size_t dsize = strlen (dest);
72			size_t len = strlen (src);
73			size_t res = dsize + len;
74
75			dest += dsize;
76			count -= dsize;
77			if (len >= count)
78			len = count - 1;
79			memcpy (dest, src, len);
80			dest[len] = 0;
81			return res;
82			}
83			#endif
84
85			#ifndef HAVE_STRLCPY
86			size_t
87			strlcpy (char dest, char const src, size_t size)
88			{
89			size_t ret = strlen (src);
90
91			if (size)
92			{
93			size_t len = (ret >= size) ? size - 1 : ret;
94			memcpy (dest, src, len);
95			dest[len] = '\0';
96			}
97			return ret;
98			}
99			#endif
100
101			/* removes unwanted chars from a line */
102			char const *
103			strip (char *line)
104			{
105			char *c = 0;
106
107			if (line)
108			{
109			if ((c = strchr (line, '\n')))
110			*c = '\0';
111			if ((c = strchr (line, '\r')))
112			*c = '\0';
113			if ((c = strchr (line, '\1')))
114			*c = '\0';
115			}
116
117			return c;
118			}
119
120			int
121	pippijn	1.4	dynstr::append (char c)
122	pippijn	1.1	{
123			if (size - pos <= 1)
124			{
125			size_t new_size = std::max (size * 2, pos + 9);
126			size = new_size;
127			m_rep = new char[new_size];
128			}
129			m_rep[pos] = c;
130			m_rep[++pos] = '\0';
131
132			return size;
133			}
134
135			int
136	pippijn	1.4	dynstr::append_nonul (char c)
137	pippijn	1.1	{
138			if (size - pos <= 1)
139			{
140			size_t new_size = std::max (size * 2, pos + 9);
141			size = new_size;
142			m_rep = new char[new_size];
143			}
144			m_rep[pos++] = c;
145
146			return size;
147			}
148
149			int
150	pippijn	1.4	dynstr::append (char const *src, size_t len)
151	pippijn	1.1	{
152	pippijn	1.4	if (size - pos <= len)
153	pippijn	1.1	{
154	pippijn	1.4	size_t new_size = std::max (size * 2, pos + len + 8);
155			size = new_size;
156	pippijn	1.1	m_rep = new char[new_size];
157			}
158	pippijn	1.4	memcpy (m_rep + pos, src, len);
159			pos += len;
160	pippijn	1.1	m_rep[pos] = '\0';
161
162	pippijn	1.4	return len;
163	pippijn	1.1	}
164
165			int
166	pippijn	1.4	dynstr::append_nonul (char const *src, size_t len)
167	pippijn	1.1	{
168	pippijn	1.4	if (size - pos <= len)
169	pippijn	1.1	{
170	pippijn	1.4	size_t new_size = std::max (size * 2, pos + len + 8);
171			size = new_size;
172	pippijn	1.1	m_rep = new char[new_size];
173			}
174	pippijn	1.4	memcpy (m_rep + pos, src, len);
175			pos += len;
176	pippijn	1.1
177	pippijn	1.4	return len;
178	pippijn	1.1	}
179
180			int
181	pippijn	1.4	dynstr::append_unguarded (char c)
182	pippijn	1.1	{
183			m_rep[pos] = c;
184			m_rep[++pos] = '\0';
185
186			return size;
187			}
188
189			int
190	pippijn	1.4	dynstr::append_unguarded_nonul (char c)
191	pippijn	1.1	{
192			m_rep[pos++] = c;
193
194			return size;
195			}
196
197			int
198	pippijn	1.4	dynstr::append_unguarded (char const *src, size_t len)
199	pippijn	1.1	{
200	pippijn	1.4	memcpy (m_rep + pos, src, len);
201			pos += len;
202	pippijn	1.1	m_rep[pos] = '\0';
203
204	pippijn	1.4	return len;
205	pippijn	1.1	}
206
207			int
208	pippijn	1.4	dynstr::append_unguarded_nonul (char const *src, size_t len)
209	pippijn	1.1	{
210	pippijn	1.4	memcpy (m_rep + pos, src, len);
211			pos += len;
212	pippijn	1.1
213	pippijn	1.4	return len;
214	pippijn	1.1	}