rxvt-unicode/src/misc.C

/*--------------------------------*-C-*---------------------------------*
 * File:        misc.C
 *----------------------------------------------------------------------*
 *
 * All portions of code are copyright by their respective author/s.
 * Copyright (c) 1996      mj olesen <olesen@me.QueensU.CA> Queen's Univ at Kingston
 * Copyright (c) 1997,1998 Oezguer Kesim <kesim@math.fu-berlin.de>
 * Copyright (c) 1998-2000 Geoff Wing <gcw@pobox.com>
 * Copyright (c) 2003-2004 Marc Lehmann <pcg@goof.com>
 *
 * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
 *----------------------------------------------------------------------*/

#include "../config.h"          /* NECESSARY */
#include "rxvt.h"               /* NECESSARY */

char *
rxvt_wcstombs (const wchar_t *str, int len)
{
  if (len < 0) len = wcslen (str);

  mbstate mbs;
  char *r = (char *)rxvt_malloc (len * MB_CUR_MAX + 1);

  char *dst = r;
  while (len--)
    {
      ssize_t l = wcrtomb (dst, *str++, mbs);

      if (l < 0)
        *dst++ = '?';
      else
        dst += l;
    }

  *dst++ = 0;

  return (char *)rxvt_realloc (r, dst - r);
}

wchar_t *
rxvt_mbstowcs (const char *str, int len)
{
  if (len < 0) len = strlen (str);

  wchar_t *r = (wchar_t *)rxvt_malloc ((len + 1) * sizeof (wchar_t));

  if ((ssize_t)mbstowcs (r, str, len + 1) < 0)
    *r = 0;

  return r;
}

char *
rxvt_wcstoutf8 (const wchar_t *str, int len)
{
  if (len < 0) len = wcslen (str);

  char *r = (char *)rxvt_malloc (len * 4 + 1);
  char *p = r;

  while (len--)
    {
      unicode_t w = *str++ & UNICODE_MASK;

      if      (w < 0x000080)
        *p++ = w;
      else if (w < 0x000800)
        *p++ = 0xc0 | ( w >>  6),
        *p++ = 0x80 | ( w        & 0x3f);
      else if (w < 0x010000)
        *p++ = 0xe0 | ( w >> 12       ),
        *p++ = 0x80 | ((w >>  6) & 0x3f),
        *p++ = 0x80 | ( w        & 0x3f);
      else if (w < 0x110000)
        *p++ = 0xf0 | ( w >> 18),
        *p++ = 0x80 | ((w >> 12) & 0x3f),
        *p++ = 0x80 | ((w >>  6) & 0x3f),
        *p++ = 0x80 | ( w        & 0x3f);
      else
        *p++ = '?';
    }

  *p++ = 0;

  return (char *)rxvt_realloc (r, p - r);
}

wchar_t *
rxvt_utf8towcs (const char *str, int len)
{
  if (len < 0) len = strlen (str);

  wchar_t *r = (wchar_t *)rxvt_malloc ((len + 1) * sizeof (wchar_t)),
          *p = r;

  unsigned char *s = (unsigned char *)str,
                *e = s + len;

  for (;;)
    {
      len = e - s;

      if (len == 0)
        break;
      else if (s[0] < 0x80)
        *p++ = *s++;
      else if (len >= 2
               && s[0] >= 0xc2 && s[0] <= 0xdf 
               && (s[1] & 0xc0) == 0x80)
        {
          *p++ = ((s[0] & 0x1f) << 6)
               |  (s[1] & 0x3f);
          s += 2;
        }
      else if (len >= 3
               && (   (s[0] == 0xe0                 && s[1] >= 0xa0 && s[1] <= 0xbf)
                   || (s[0] >= 0xe1 && s[0] <= 0xec && s[1] >= 0x80 && s[1] <= 0xbf)
                   || (s[0] == 0xed                 && s[1] >= 0x80 && s[1] <= 0x9f)
                   || (s[0] >= 0xee && s[0] <= 0xef && s[1] >= 0x80 && s[1] <= 0xbf)
                  )
               && (s[2] & 0xc0) == 0x80)
        {
          *p++ = ((s[0] & 0x0f) << 12)
               | ((s[1] & 0x3f) <<  6)
               |  (s[2] & 0x3f);
          s += 3;
        }
      else if (len >= 4
               && (   (s[0] == 0xf0                 && s[1] >= 0x90 && s[1] <= 0xbf)
                   || (s[0] >= 0xf1 && s[0] <= 0xf3 && s[1] >= 0x80 && s[1] <= 0xbf)
                   || (s[0] == 0xf4                 && s[1] >= 0x80 && s[1] <= 0x8f)
                  )
               && (s[2] & 0xc0) == 0x80
               && (s[3] & 0xc0) == 0x80)
        {
          *p++ = ((s[0] & 0x07) << 18) 
               | ((s[1] & 0x3f) << 12) 
               | ((s[2] & 0x3f) <<  6) 
               |  (s[3] & 0x3f);
          s += 4;
        }
      else
        {
          *p++ = 0xfffd;
          s++;
        }
    }

  *p = 0;

  return r;
}

char *
rxvt_r_basename (const char *str) NOTHROW
{
  char *base = strrchr (str, '/');

  return (char *) (base ? base + 1 : str);
}

/*
 * Print an error message
 */
void
rxvt_vlog (const char *fmt, va_list arg_ptr) NOTHROW
{
  char msg[1024];

  vsnprintf (msg, sizeof msg, fmt, arg_ptr);

  if (GET_R && GET_R->log_hook)
    (*GET_R->log_hook) (msg);
  else
    write (STDOUT_FILENO, msg, strlen (msg));
}

void
rxvt_log (const char *fmt,...) NOTHROW
{
  va_list arg_ptr;

  va_start (arg_ptr, fmt);
  rxvt_vlog (fmt, arg_ptr);
  va_end (arg_ptr);
}

/*
 * Print an error message
 */
void
rxvt_warn (const char *fmt,...) NOTHROW
{
  va_list arg_ptr;

  rxvt_log ("%s: ", RESNAME);

  va_start (arg_ptr, fmt);
  rxvt_vlog (fmt, arg_ptr);
  va_end (arg_ptr);
}

void
rxvt_fatal (const char *fmt,...) THROW ((class rxvt_failure_exception))
{
  va_list arg_ptr;

  rxvt_log ("%s: ", RESNAME);

  va_start (arg_ptr, fmt);
  rxvt_vlog (fmt, arg_ptr);
  va_end (arg_ptr);

  rxvt_exit_failure ();
}

void
rxvt_exit_failure () THROW ((class rxvt_failure_exception))
{
  static class rxvt_failure_exception rxvt_failure_exception;
  throw (rxvt_failure_exception);
}

/*
 * check that the first characters of S1 match S2
 *
 * No Match
 *      return: 0
 * Match
 *      return: strlen (S2)
 */
int
rxvt_Str_match (const char *s1, const char *s2) NOTHROW
{
  int n = strlen (s2);

  return ((strncmp (s1, s2, n) == 0) ? n : 0);
}

const char *
rxvt_Str_skip_space (const char *str) NOTHROW
{
  if (str)
    while (*str && isspace (*str))
      str++;

  return str;
}

/*
 * remove leading/trailing space and strip-off leading/trailing quotes.
 * in place.
 */
char           *
rxvt_Str_trim (char *str) NOTHROW
{
  char *r, *s;

  if (!str || !*str)            /* shortcut */
    return str;

  /* skip leading spaces */
  for (s = str; *s && isspace (*s); s++) ;

  /* goto end of string */
  r = s + strlen (s) - 1;

  /* dump return and other trailing whitespace */
  while (r > s && isspace (*r))
    r--;

#if 0
  /* skip matching leading/trailing quotes */
  if (*s == '"' && *r == '"' && n > 1)
    {
      s++;
      n -= 2;
    }
#endif

  memmove (str, s, r + 1 - s);
  str[r + 1 - s] = 0;

  return str;
}

/*
 * in-place interpretation of string:
 *
 *      backslash-escaped:      "\a\b\E\e\n\r\t", "\octal"
 *      Ctrl chars:     ^@ .. ^_, ^?
 *
 *      Emacs-style:    "M-" prefix
 *
 * Also,
 *      "M-x" prefixed strings, append "\r" if needed
 *      "\E]" prefixed strings (XTerm escape sequence) append ST if needed
 *
 * returns the converted string length
 */
int
rxvt_Str_escaped (char *str) NOTHROW
{
  char            ch, *s, *d;
  int             i, num, append = 0;

  if (!str || !*str)
    return 0;

  d = s = str;

  if (*s == 'M' && s[1] == '-')
    {
      /* Emacs convenience, replace leading `M-..' with `\E..' */
      *d++ = C0_ESC;
      s += 2;
      if (toupper (*s) == 'X')
        /* append carriage-return for `M-xcommand' */
        for (*d++ = 'x', append = '\r', s++; isspace (*s); s++) ;
    }
  for (; (ch = *s++);)
    {
      if (ch == '\\')
        {
          ch = *s++;
          if (ch >= '0' && ch <= '7')
            {   /* octal */
              num = ch - '0';
              for (i = 0; i < 2; i++, s++)
                {
                  ch = *s;
                  if (ch < '0' || ch > '7')
                    break;
                  num = num * 8 + ch - '0';
                }
              ch = (char)num;
            }
          else if (ch == 'a')
            ch = C0_BEL;        /* bell */
          else if (ch == 'b')
            ch = C0_BS; /* backspace */
          else if (ch == 'E' || ch == 'e')
            ch = C0_ESC;        /* escape */
          else if (ch == 'n')
            ch = '\n';  /* newline */
          else if (ch == 'r')
            ch = '\r';  /* carriage-return */
          else if (ch == 't')
            ch = C0_HT; /* tab */
        }
      else if (ch == '^')
        {
          ch = *s++;
          ch = toupper (ch);
          ch = (ch == '?' ? 127 : (ch - '@'));
        }
      *d++ = ch;
    }

  /* ESC] is an XTerm escape sequence, must be terminated */
  if (*str == '\0' && str[1] == C0_ESC && str[2] == ']')
    append = CHAR_ST;

  /* add trailing character as required */
  if (append && d[-1] != append)
    *d++ = append;
  *d = '\0';

  return (d - str);
}

/*
 * Split a comma-separated string into an array, stripping leading and
 * trailing spaces from each entry.  Empty strings are properly returned
 * Caller should free each entry and array when done
 */
char          **
rxvt_splitcommastring (const char *cs) NOTHROW
{
  int             l, n, p;
  const char     *s, *t;
  char          **ret;

  if ((s = cs) == NULL)
    s = "";

  for (n = 1, t = s; *t; t++)
    if (*t == ',')
      n++;

  ret = (char **)malloc ((n + 1) * sizeof (char *));
  ret[n] = NULL;

  for (l = 0, t = s; l < n; l++)
    {
      for ( ; *t && *t != ','; t++) ;
      p = t - s;
      ret[l] = (char *)malloc (p + 1);
      strncpy (ret[l], s, p);
      ret[l][p] = '\0';
      rxvt_Str_trim (ret[l]);
      s = ++t;
    }

  return ret;
}

void
rxvt_freecommastring (char **cs) NOTHROW
{
  for (int i = 0; cs[i]; ++i)
    free (cs[i]);

  free (cs);
}

/*----------------------------------------------------------------------*
 * file searching
 */

#ifdef XPM_BACKGROUND
/*
 * search for FILE in the current working directory, and within the
 * colon-delimited PATHLIST, adding the file extension EXT if required.
 *
 * FILE is either semi-colon or zero terminated
 */
char *
rxvt_File_search_path (const char *pathlist, const char *file, const char *ext) NOTHROW
{
  int             maxpath, len;
  const char     *p, *path;
  char            name[256];

  if (!access (file, R_OK))     /* found (plain name) in current directory */
    return strdup (file);

  /* semi-colon delimited */
  if ((p = strchr (file, ';')))
    len = (p - file);
  else
    len = strlen (file);

  /* leave room for an extra '/' and trailing '\0' */
  maxpath = sizeof (name) - (len + (ext ? strlen (ext) : 0) + 2);
  if (maxpath <= 0)
    return NULL;

  /* check if we can find it now */
  strncpy (name, file, len);
  name[len] = '\0';

  if (!access (name, R_OK))
    return strdup (name);
  if (ext)
    {
      strcat (name, ext);
      if (!access (name, R_OK))
        return strdup (name);
    }
  for (path = pathlist; path != NULL && *path != '\0'; path = p)
    {
      int             n;

      /* colon delimited */
      if ((p = strchr (path, ':')) == NULL)
        p = strchr (path, '\0');

      n = (p - path);
      if (*p != '\0')
        p++;

      if (n > 0 && n <= maxpath)
        {
          strncpy (name, path, n);
          if (name[n - 1] != '/')
            name[n++] = '/';
          name[n] = '\0';
          strncat (name, file, len);

          if (!access (name, R_OK))
            return strdup (name);
          if (ext)
            {
              strcat (name, ext);
              if (!access (name, R_OK))
                return strdup (name);
            }
        }
    }
  return NULL;
}

char *
rxvt_File_find (const char *file, const char *ext, const char *path) NOTHROW
{
  char           *f;

  if (file == NULL || *file == '\0')
    return NULL;

  f = rxvt_File_search_path (path, file, ext);

  return f;
}
#endif


Revision:	1.38
Committed:	Tue Jan 24 19:40:12 2006 UTC (18 years, 4 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-7_3a, rel-7_3, rel-7_6, rel-7_5, rel-7_4
Changes since 1.37:	+2 -15 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	pcg	1.1	/---------------------------------C----------------------------------
2	pcg	1.13	* File: misc.C
3	pcg	1.1	----------------------------------------------------------------------
4			*
5			* All portions of code are copyright by their respective author/s.
6			* Copyright (c) 1996 mj olesen <olesen@me.QueensU.CA> Queen's Univ at Kingston
7			* Copyright (c) 1997,1998 Oezguer Kesim <kesim@math.fu-berlin.de>
8			* Copyright (c) 1998-2000 Geoff Wing <gcw@pobox.com>
9	pcg	1.8	* Copyright (c) 2003-2004 Marc Lehmann <pcg@goof.com>
10	pcg	1.1	*
11			* This program is free software; you can redistribute it and/or modify
12			* it under the terms of the GNU General Public License as published by
13			* the Free Software Foundation; either version 2 of the License, or
14			* (at your option) any later version.
15			*
16			* This program is distributed in the hope that it will be useful,
17			* but WITHOUT ANY WARRANTY; without even the implied warranty of
18			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19			* GNU General Public License for more details.
20			*
21			* You should have received a copy of the GNU General Public License
22			* along with this program; if not, write to the Free Software
23			* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24			----------------------------------------------------------------------/
25
26			#include "../config.h" /* NECESSARY */
27			#include "rxvt.h" /* NECESSARY */
28
29	pcg	1.3	char *
30	pcg	1.10	rxvt_wcstombs (const wchar_t *str, int len)
31			{
32	root	1.19	if (len < 0) len = wcslen (str);
33
34	pcg	1.10	mbstate mbs;
35			char r = (char )rxvt_malloc (len * MB_CUR_MAX + 1);
36
37			char *dst = r;
38			while (len--)
39			{
40	root	1.24	ssize_t l = wcrtomb (dst, *str++, mbs);
41	root	1.31
42	pcg	1.10	if (l < 0)
43			*dst++ = '?';
44			else
45			dst += l;
46			}
47
48			*dst++ = 0;
49
50	root	1.24	return (char *)rxvt_realloc (r, dst - r);
51	pcg	1.10	}
52
53	root	1.19	wchar_t *
54			rxvt_mbstowcs (const char *str, int len)
55			{
56			if (len < 0) len = strlen (str);
57
58			wchar_t r = (wchar_t )rxvt_malloc ((len + 1) * sizeof (wchar_t));
59
60	root	1.24	if ((ssize_t)mbstowcs (r, str, len + 1) < 0)
61	root	1.19	*r = 0;
62
63			return r;
64			}
65
66			char *
67			rxvt_wcstoutf8 (const wchar_t *str, int len)
68			{
69			if (len < 0) len = wcslen (str);
70
71			char r = (char )rxvt_malloc (len * 4 + 1);
72			char *p = r;
73
74			while (len--)
75			{
76	root	1.22	unicode_t w = *str++ & UNICODE_MASK;
77	root	1.19
78			if (w < 0x000080)
79			*p++ = w;
80			else if (w < 0x000800)
81			*p++ = 0xc0 \| ( w >> 6),
82			*p++ = 0x80 \| ( w & 0x3f);
83			else if (w < 0x010000)
84			*p++ = 0xe0 \| ( w >> 12 ),
85			*p++ = 0x80 \| ((w >> 6) & 0x3f),
86			*p++ = 0x80 \| ( w & 0x3f);
87			else if (w < 0x110000)
88			*p++ = 0xf0 \| ( w >> 18),
89			*p++ = 0x80 \| ((w >> 12) & 0x3f),
90			*p++ = 0x80 \| ((w >> 6) & 0x3f),
91			*p++ = 0x80 \| ( w & 0x3f);
92			else
93			*p++ = '?';
94			}
95
96	root	1.24	*p++ = 0;
97	root	1.19
98	root	1.24	return (char *)rxvt_realloc (r, p - r);
99	root	1.19	}
100
101			wchar_t *
102			rxvt_utf8towcs (const char *str, int len)
103			{
104			if (len < 0) len = strlen (str);
105
106	root	1.21	wchar_t r = (wchar_t )rxvt_malloc ((len + 1) * sizeof (wchar_t)),
107			*p = r;
108	root	1.19
109	root	1.21	unsigned char s = (unsigned char )str,
110			*e = s + len;
111	root	1.19
112	root	1.21	for (;;)
113	root	1.19	{
114	root	1.21	len = e - s;
115
116			if (len == 0)
117			break;
118			else if (s[0] < 0x80)
119			p++ = s++;
120			else if (len >= 2
121	root	1.19	&& s[0] >= 0xc2 && s[0] <= 0xdf
122			&& (s[1] & 0xc0) == 0x80)
123			{
124			*p++ = ((s[0] & 0x1f) << 6)
125			\| (s[1] & 0x3f);
126	root	1.21	s += 2;
127	root	1.19	}
128	root	1.21	else if (len >= 3
129	root	1.19	&& ( (s[0] == 0xe0 && s[1] >= 0xa0 && s[1] <= 0xbf)
130			\|\| (s[0] >= 0xe1 && s[0] <= 0xec && s[1] >= 0x80 && s[1] <= 0xbf)
131			\|\| (s[0] == 0xed && s[1] >= 0x80 && s[1] <= 0x9f)
132			\|\| (s[0] >= 0xee && s[0] <= 0xef && s[1] >= 0x80 && s[1] <= 0xbf)
133			)
134			&& (s[2] & 0xc0) == 0x80)
135			{
136			*p++ = ((s[0] & 0x0f) << 12)
137			\| ((s[1] & 0x3f) << 6)
138			\| (s[2] & 0x3f);
139	root	1.21	s += 3;
140	root	1.19	}
141	root	1.21	else if (len >= 4
142	root	1.19	&& ( (s[0] == 0xf0 && s[1] >= 0x90 && s[1] <= 0xbf)
143			\|\| (s[0] >= 0xf1 && s[0] <= 0xf3 && s[1] >= 0x80 && s[1] <= 0xbf)
144			\|\| (s[0] == 0xf4 && s[1] >= 0x80 && s[1] <= 0x8f)
145			)
146			&& (s[2] & 0xc0) == 0x80
147			&& (s[3] & 0xc0) == 0x80)
148			{
149			*p++ = ((s[0] & 0x07) << 18)
150			\| ((s[1] & 0x3f) << 12)
151			\| ((s[2] & 0x3f) << 6)
152			\| (s[3] & 0x3f);
153	root	1.21	s += 4;
154	root	1.19	}
155			else
156			{
157			*p++ = 0xfffd;
158	root	1.21	s++;
159	root	1.19	}
160			}
161
162			*p = 0;
163
164			return r;
165			}
166
167	pcg	1.10	char *
168	root	1.36	rxvt_r_basename (const char *str) NOTHROW
169	pcg	1.1	{
170	root	1.15	char *base = strrchr (str, '/');
171	pcg	1.1
172	pcg	1.7	return (char *) (base ? base + 1 : str);
173	pcg	1.1	}
174
175			/*
176			* Print an error message
177			*/
178			void
179	root	1.36	rxvt_vlog (const char *fmt, va_list arg_ptr) NOTHROW
180	pcg	1.12	{
181			char msg[1024];
182
183			vsnprintf (msg, sizeof msg, fmt, arg_ptr);
184
185			if (GET_R && GET_R->log_hook)
186			(*GET_R->log_hook) (msg);
187			else
188			write (STDOUT_FILENO, msg, strlen (msg));
189			}
190
191			void
192	root	1.36	rxvt_log (const char *fmt,...) NOTHROW
193	pcg	1.1	{
194	pcg	1.8	va_list arg_ptr;
195	pcg	1.1
196	pcg	1.7	va_start (arg_ptr, fmt);
197	pcg	1.12	rxvt_vlog (fmt, arg_ptr);
198	pcg	1.7	va_end (arg_ptr);
199	pcg	1.1	}
200
201			/*
202	pcg	1.12	* Print an error message
203			*/
204			void
205	root	1.36	rxvt_warn (const char *fmt,...) NOTHROW
206	pcg	1.12	{
207			va_list arg_ptr;
208
209			rxvt_log ("%s: ", RESNAME);
210
211			va_start (arg_ptr, fmt);
212			rxvt_vlog (fmt, arg_ptr);
213			va_end (arg_ptr);
214			}
215
216			void
217	root	1.36	rxvt_fatal (const char *fmt,...) THROW ((class rxvt_failure_exception))
218	pcg	1.12	{
219			va_list arg_ptr;
220
221			rxvt_log ("%s: ", RESNAME);
222
223			va_start (arg_ptr, fmt);
224			rxvt_vlog (fmt, arg_ptr);
225			va_end (arg_ptr);
226
227			rxvt_exit_failure ();
228			}
229
230			void
231	root	1.36	rxvt_exit_failure () THROW ((class rxvt_failure_exception))
232	pcg	1.12	{
233	root	1.36	static class rxvt_failure_exception rxvt_failure_exception;
234	pcg	1.12	throw (rxvt_failure_exception);
235			}
236
237			/*
238	pcg	1.1	* check that the first characters of S1 match S2
239			*
240			* No Match
241			* return: 0
242			* Match
243	root	1.15	* return: strlen (S2)
244	pcg	1.1	*/
245			int
246	root	1.36	rxvt_Str_match (const char s1, const char s2) NOTHROW
247	pcg	1.1	{
248	root	1.15	int n = strlen (s2);
249	pcg	1.1
250	root	1.15	return ((strncmp (s1, s2, n) == 0) ? n : 0);
251	pcg	1.1	}
252
253	pcg	1.8	const char *
254	root	1.36	rxvt_Str_skip_space (const char *str) NOTHROW
255	pcg	1.1	{
256	pcg	1.5	if (str)
257	pcg	1.7	while (str && isspace (str))
258	pcg	1.5	str++;
259	pcg	1.8
260	pcg	1.5	return str;
261	pcg	1.1	}
262
263			/*
264			* remove leading/trailing space and strip-off leading/trailing quotes.
265			* in place.
266			*/
267			char *
268	root	1.36	rxvt_Str_trim (char *str) NOTHROW
269	pcg	1.1	{
270	pcg	1.8	char r, s;
271	pcg	1.1
272	pcg	1.5	if (!str \|\| !str) / shortcut */
273			return str;
274	pcg	1.1
275	pcg	1.5	/* skip leading spaces */
276	pcg	1.7	for (s = str; s && isspace (s); s++) ;
277	root	1.25
278	pcg	1.5	/* goto end of string */
279	root	1.25	r = s + strlen (s) - 1;
280
281			/* dump return and other trailing whitespace */
282			while (r > s && isspace (*r))
283			r--;
284
285			#if 0
286	pcg	1.5	/* skip matching leading/trailing quotes */
287			if (s == '"' && r == '"' && n > 1)
288			{
289			s++;
290			n -= 2;
291	pcg	1.1	}
292	root	1.25	#endif
293	pcg	1.8
294	root	1.25	memmove (str, s, r + 1 - s);
295			str[r + 1 - s] = 0;
296	pcg	1.1
297	pcg	1.5	return str;
298	pcg	1.1	}
299
300			/*
301			* in-place interpretation of string:
302			*
303			* backslash-escaped: "\a\b\E\e\n\r\t", "\octal"
304			* Ctrl chars: ^@ .. ^_, ^?
305			*
306			* Emacs-style: "M-" prefix
307			*
308			* Also,
309			* "M-x" prefixed strings, append "\r" if needed
310			* "\E]" prefixed strings (XTerm escape sequence) append ST if needed
311			*
312			* returns the converted string length
313			*/
314			int
315	root	1.36	rxvt_Str_escaped (char *str) NOTHROW
316	pcg	1.1	{
317	pcg	1.5	char ch, s, d;
318			int i, num, append = 0;
319	pcg	1.1
320	pcg	1.5	if (!str \|\| !*str)
321			return 0;
322	pcg	1.1
323	pcg	1.5	d = s = str;
324	pcg	1.1
325	pcg	1.5	if (*s == 'M' && s[1] == '-')
326			{
327			/* Emacs convenience, replace leading `M-..' with `\E..' */
328			*d++ = C0_ESC;
329			s += 2;
330	pcg	1.7	if (toupper (*s) == 'X')
331	pcg	1.5	/* append carriage-return for `M-xcommand' */
332	pcg	1.7	for (d++ = 'x', append = '\r', s++; isspace (s); s++) ;
333	pcg	1.1	}
334	pcg	1.5	for (; (ch = *s++);)
335			{
336			if (ch == '\\')
337			{
338			ch = *s++;
339			if (ch >= '0' && ch <= '7')
340			{ /* octal */
341			num = ch - '0';
342			for (i = 0; i < 2; i++, s++)
343			{
344			ch = *s;
345			if (ch < '0' \|\| ch > '7')
346			break;
347			num = num * 8 + ch - '0';
348			}
349			ch = (char)num;
350			}
351			else if (ch == 'a')
352			ch = C0_BEL; /* bell */
353			else if (ch == 'b')
354			ch = C0_BS; /* backspace */
355			else if (ch == 'E' \|\| ch == 'e')
356			ch = C0_ESC; /* escape */
357			else if (ch == 'n')
358			ch = '\n'; /* newline */
359			else if (ch == 'r')
360			ch = '\r'; /* carriage-return */
361			else if (ch == 't')
362			ch = C0_HT; /* tab */
363			}
364			else if (ch == '^')
365			{
366			ch = *s++;
367	pcg	1.7	ch = toupper (ch);
368	pcg	1.5	ch = (ch == '?' ? 127 : (ch - '@'));
369			}
370			*d++ = ch;
371	pcg	1.1	}
372
373	pcg	1.5	/* ESC] is an XTerm escape sequence, must be terminated */
374			if (*str == '\0' && str[1] == C0_ESC && str[2] == ']')
375			append = CHAR_ST;
376
377			/* add trailing character as required */
378			if (append && d[-1] != append)
379			*d++ = append;
380			*d = '\0';
381	pcg	1.1
382	pcg	1.5	return (d - str);
383	pcg	1.1	}
384
385			/*
386			* Split a comma-separated string into an array, stripping leading and
387	root	1.25	* trailing spaces from each entry. Empty strings are properly returned
388	pcg	1.1	* Caller should free each entry and array when done
389			*/
390			char **
391	root	1.36	rxvt_splitcommastring (const char *cs) NOTHROW
392	pcg	1.1	{
393	pcg	1.5	int l, n, p;
394			const char s, t;
395			char **ret;
396
397			if ((s = cs) == NULL)
398			s = "";
399
400			for (n = 1, t = s; *t; t++)
401			if (*t == ',')
402			n++;
403	root	1.25
404	pcg	1.7	ret = (char *)malloc ((n + 1) sizeof (char *));
405	pcg	1.5	ret[n] = NULL;
406
407			for (l = 0, t = s; l < n; l++)
408			{
409			for ( ; t && t != ','; t++) ;
410			p = t - s;
411	pcg	1.7	ret[l] = (char *)malloc (p + 1);
412			strncpy (ret[l], s, p);
413	pcg	1.5	ret[l][p] = '\0';
414	pcg	1.7	rxvt_Str_trim (ret[l]);
415	pcg	1.5	s = ++t;
416	pcg	1.1	}
417	root	1.25
418	pcg	1.5	return ret;
419	pcg	1.1	}
420
421	root	1.16	void
422	root	1.36	rxvt_freecommastring (char **cs) NOTHROW
423	root	1.16	{
424			for (int i = 0; cs[i]; ++i)
425			free (cs[i]);
426
427			free (cs);
428			}
429
430	pcg	1.1	/----------------------------------------------------------------------
431			* file searching
432			*/
433
434	root	1.33	#ifdef XPM_BACKGROUND
435	pcg	1.1	/*
436			* search for FILE in the current working directory, and within the
437			* colon-delimited PATHLIST, adding the file extension EXT if required.
438			*
439			* FILE is either semi-colon or zero terminated
440			*/
441	root	1.38	char *
442	root	1.36	rxvt_File_search_path (const char pathlist, const char file, const char *ext) NOTHROW
443	pcg	1.1	{
444	pcg	1.5	int maxpath, len;
445			const char p, path;
446			char name[256];
447
448	pcg	1.7	if (!access (file, R_OK)) /* found (plain name) in current directory */
449	root	1.15	return strdup (file);
450	pcg	1.5
451			/* semi-colon delimited */
452	root	1.15	if ((p = strchr (file, ';')))
453	pcg	1.5	len = (p - file);
454			else
455	root	1.15	len = strlen (file);
456	pcg	1.1
457	pcg	1.5	/* leave room for an extra '/' and trailing '\0' */
458	root	1.15	maxpath = sizeof (name) - (len + (ext ? strlen (ext) : 0) + 2);
459	pcg	1.5	if (maxpath <= 0)
460			return NULL;
461
462			/* check if we can find it now */
463	root	1.15	strncpy (name, file, len);
464	pcg	1.5	name[len] = '\0';
465
466	pcg	1.7	if (!access (name, R_OK))
467	root	1.15	return strdup (name);
468	pcg	1.5	if (ext)
469			{
470	root	1.15	strcat (name, ext);
471	pcg	1.7	if (!access (name, R_OK))
472	root	1.15	return strdup (name);
473	pcg	1.1	}
474	pcg	1.5	for (path = pathlist; path != NULL && *path != '\0'; path = p)
475			{
476			int n;
477
478			/* colon delimited */
479	root	1.15	if ((p = strchr (path, ':')) == NULL)
480			p = strchr (path, '\0');
481	pcg	1.5
482			n = (p - path);
483			if (*p != '\0')
484			p++;
485
486			if (n > 0 && n <= maxpath)
487			{
488	root	1.15	strncpy (name, path, n);
489	pcg	1.5	if (name[n - 1] != '/')
490			name[n++] = '/';
491			name[n] = '\0';
492	root	1.15	strncat (name, file, len);
493	pcg	1.5
494	pcg	1.7	if (!access (name, R_OK))
495	root	1.15	return strdup (name);
496	pcg	1.5	if (ext)
497			{
498	root	1.15	strcat (name, ext);
499	pcg	1.7	if (!access (name, R_OK))
500	root	1.15	return strdup (name);
501	pcg	1.5	}
502			}
503	pcg	1.1	}
504	pcg	1.5	return NULL;
505	pcg	1.1	}
506
507	root	1.38	char *
508	root	1.36	rxvt_File_find (const char file, const char ext, const char *path) NOTHROW
509	pcg	1.1	{
510	pcg	1.5	char *f;
511	pcg	1.1
512	pcg	1.5	if (file == NULL \|\| *file == '\0')
513			return NULL;
514	pcg	1.1
515	root	1.32	f = rxvt_File_search_path (path, file, ext);
516	pcg	1.1
517	pcg	1.5	return f;
518	pcg	1.1	}
519	root	1.33	#endif
520	pcg	1.1
521	root	1.28