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_strdup (const char *str)
{
  return str ? strdup (str) : 0;
}

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

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

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

class rxvt_failure_exception rxvt_failure_exception;

void
rxvt_exit_failure ()
{
  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)
{
  int n = strlen (s2);

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

const char *
rxvt_Str_skip_space (const char *str)
{
  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)
{
  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)
{
  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)
{
  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)
{
  for (int i = 0; cs[i]; ++i)
    free (cs[i]);

  free (cs);
}

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

/* #define DEBUG_SEARCH_PATH */

#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)
{
  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);

#ifdef DEBUG_SEARCH_PATH
  getcwd (name, sizeof (name));
  fprintf (stderr, "pwd: \"%s\"\n", name);
  fprintf (stderr, "find: \"%.*s\"\n", len, file);
#endif

  /* 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)
{
  char           *f;

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

  f = rxvt_File_search_path (path, file, ext);

#ifdef DEBUG_SEARCH_PATH
  if (f)
    fprintf (stderr, "found: \"%s\"\n", f);
#endif

  return f;
}
#endif

// should not be used in interactive programs, for obvious reasons
void rxvt_usleep (int usecs)
{
#if HAVE_NANOSLEEP
  struct timespec ts;

  ts.tv_sec = 0;
  ts.tv_nsec = usecs * 1000;
  nanosleep (&ts, NULL);
#else                 
  /* use select for timing */
  struct timeval  tv;

  tv.tv_sec = 0;
  tv.tv_usec = usecs;
  select (0, NULL, NULL, NULL, &tv);
#endif                
}

/*----------------------- end-of-file (C source) -----------------------*/

Revision:	1.35
Committed:	Mon Jan 16 17:11:12 2006 UTC (20 years, 8 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-7_1
Changes since 1.34:	+0 -26 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	pcg	1.3	rxvt_strdup (const char *str)
169			{
170			return str ? strdup (str) : 0;
171			}
172
173	pcg	1.8	char *
174	pcg	1.7	rxvt_r_basename (const char *str)
175	pcg	1.1	{
176	root	1.15	char *base = strrchr (str, '/');
177	pcg	1.1
178	pcg	1.7	return (char *) (base ? base + 1 : str);
179	pcg	1.1	}
180
181			/*
182			* Print an error message
183			*/
184			void
185	pcg	1.12	rxvt_vlog (const char *fmt, va_list arg_ptr)
186			{
187			char msg[1024];
188
189			vsnprintf (msg, sizeof msg, fmt, arg_ptr);
190
191			if (GET_R && GET_R->log_hook)
192			(*GET_R->log_hook) (msg);
193			else
194			write (STDOUT_FILENO, msg, strlen (msg));
195			}
196
197			void
198			rxvt_log (const char *fmt,...)
199	pcg	1.1	{
200	pcg	1.8	va_list arg_ptr;
201	pcg	1.1
202	pcg	1.7	va_start (arg_ptr, fmt);
203	pcg	1.12	rxvt_vlog (fmt, arg_ptr);
204	pcg	1.7	va_end (arg_ptr);
205	pcg	1.1	}
206
207			/*
208	pcg	1.12	* Print an error message
209			*/
210			void
211			rxvt_warn (const char *fmt,...)
212			{
213			va_list arg_ptr;
214
215			rxvt_log ("%s: ", RESNAME);
216
217			va_start (arg_ptr, fmt);
218			rxvt_vlog (fmt, arg_ptr);
219			va_end (arg_ptr);
220			}
221
222			void
223			rxvt_fatal (const char *fmt,...)
224			{
225			va_list arg_ptr;
226
227			rxvt_log ("%s: ", RESNAME);
228
229			va_start (arg_ptr, fmt);
230			rxvt_vlog (fmt, arg_ptr);
231			va_end (arg_ptr);
232
233			rxvt_exit_failure ();
234			}
235
236			class rxvt_failure_exception rxvt_failure_exception;
237
238			void
239			rxvt_exit_failure ()
240			{
241			throw (rxvt_failure_exception);
242			}
243
244			/*
245	pcg	1.1	* check that the first characters of S1 match S2
246			*
247			* No Match
248			* return: 0
249			* Match
250	root	1.15	* return: strlen (S2)
251	pcg	1.1	*/
252			int
253	pcg	1.7	rxvt_Str_match (const char s1, const char s2)
254	pcg	1.1	{
255	root	1.15	int n = strlen (s2);
256	pcg	1.1
257	root	1.15	return ((strncmp (s1, s2, n) == 0) ? n : 0);
258	pcg	1.1	}
259
260	pcg	1.8	const char *
261	pcg	1.7	rxvt_Str_skip_space (const char *str)
262	pcg	1.1	{
263	pcg	1.5	if (str)
264	pcg	1.7	while (str && isspace (str))
265	pcg	1.5	str++;
266	pcg	1.8
267	pcg	1.5	return str;
268	pcg	1.1	}
269
270			/*
271			* remove leading/trailing space and strip-off leading/trailing quotes.
272			* in place.
273			*/
274			char *
275	pcg	1.7	rxvt_Str_trim (char *str)
276	pcg	1.1	{
277	pcg	1.8	char r, s;
278	pcg	1.1
279	pcg	1.5	if (!str \|\| !str) / shortcut */
280			return str;
281	pcg	1.1
282	pcg	1.5	/* skip leading spaces */
283	pcg	1.7	for (s = str; s && isspace (s); s++) ;
284	root	1.25
285	pcg	1.5	/* goto end of string */
286	root	1.25	r = s + strlen (s) - 1;
287
288			/* dump return and other trailing whitespace */
289			while (r > s && isspace (*r))
290			r--;
291
292			#if 0
293	pcg	1.5	/* skip matching leading/trailing quotes */
294			if (s == '"' && r == '"' && n > 1)
295			{
296			s++;
297			n -= 2;
298	pcg	1.1	}
299	root	1.25	#endif
300	pcg	1.8
301	root	1.25	memmove (str, s, r + 1 - s);
302			str[r + 1 - s] = 0;
303	pcg	1.1
304	pcg	1.5	return str;
305	pcg	1.1	}
306
307			/*
308			* in-place interpretation of string:
309			*
310			* backslash-escaped: "\a\b\E\e\n\r\t", "\octal"
311			* Ctrl chars: ^@ .. ^_, ^?
312			*
313			* Emacs-style: "M-" prefix
314			*
315			* Also,
316			* "M-x" prefixed strings, append "\r" if needed
317			* "\E]" prefixed strings (XTerm escape sequence) append ST if needed
318			*
319			* returns the converted string length
320			*/
321			int
322	pcg	1.7	rxvt_Str_escaped (char *str)
323	pcg	1.1	{
324	pcg	1.5	char ch, s, d;
325			int i, num, append = 0;
326	pcg	1.1
327	pcg	1.5	if (!str \|\| !*str)
328			return 0;
329	pcg	1.1
330	pcg	1.5	d = s = str;
331	pcg	1.1
332	pcg	1.5	if (*s == 'M' && s[1] == '-')
333			{
334			/* Emacs convenience, replace leading `M-..' with `\E..' */
335			*d++ = C0_ESC;
336			s += 2;
337	pcg	1.7	if (toupper (*s) == 'X')
338	pcg	1.5	/* append carriage-return for `M-xcommand' */
339	pcg	1.7	for (d++ = 'x', append = '\r', s++; isspace (s); s++) ;
340	pcg	1.1	}
341	pcg	1.5	for (; (ch = *s++);)
342			{
343			if (ch == '\\')
344			{
345			ch = *s++;
346			if (ch >= '0' && ch <= '7')
347			{ /* octal */
348			num = ch - '0';
349			for (i = 0; i < 2; i++, s++)
350			{
351			ch = *s;
352			if (ch < '0' \|\| ch > '7')
353			break;
354			num = num * 8 + ch - '0';
355			}
356			ch = (char)num;
357			}
358			else if (ch == 'a')
359			ch = C0_BEL; /* bell */
360			else if (ch == 'b')
361			ch = C0_BS; /* backspace */
362			else if (ch == 'E' \|\| ch == 'e')
363			ch = C0_ESC; /* escape */
364			else if (ch == 'n')
365			ch = '\n'; /* newline */
366			else if (ch == 'r')
367			ch = '\r'; /* carriage-return */
368			else if (ch == 't')
369			ch = C0_HT; /* tab */
370			}
371			else if (ch == '^')
372			{
373			ch = *s++;
374	pcg	1.7	ch = toupper (ch);
375	pcg	1.5	ch = (ch == '?' ? 127 : (ch - '@'));
376			}
377			*d++ = ch;
378	pcg	1.1	}
379
380	pcg	1.5	/* ESC] is an XTerm escape sequence, must be terminated */
381			if (*str == '\0' && str[1] == C0_ESC && str[2] == ']')
382			append = CHAR_ST;
383
384			/* add trailing character as required */
385			if (append && d[-1] != append)
386			*d++ = append;
387			*d = '\0';
388	pcg	1.1
389	pcg	1.5	return (d - str);
390	pcg	1.1	}
391
392			/*
393			* Split a comma-separated string into an array, stripping leading and
394	root	1.25	* trailing spaces from each entry. Empty strings are properly returned
395	pcg	1.1	* Caller should free each entry and array when done
396			*/
397			char **
398	pcg	1.7	rxvt_splitcommastring (const char *cs)
399	pcg	1.1	{
400	pcg	1.5	int l, n, p;
401			const char s, t;
402			char **ret;
403
404			if ((s = cs) == NULL)
405			s = "";
406
407			for (n = 1, t = s; *t; t++)
408			if (*t == ',')
409			n++;
410	root	1.25
411	pcg	1.7	ret = (char *)malloc ((n + 1) sizeof (char *));
412	pcg	1.5	ret[n] = NULL;
413
414			for (l = 0, t = s; l < n; l++)
415			{
416			for ( ; t && t != ','; t++) ;
417			p = t - s;
418	pcg	1.7	ret[l] = (char *)malloc (p + 1);
419			strncpy (ret[l], s, p);
420	pcg	1.5	ret[l][p] = '\0';
421	pcg	1.7	rxvt_Str_trim (ret[l]);
422	pcg	1.5	s = ++t;
423	pcg	1.1	}
424	root	1.25
425	pcg	1.5	return ret;
426	pcg	1.1	}
427
428	root	1.16	void
429			rxvt_freecommastring (char **cs)
430			{
431			for (int i = 0; cs[i]; ++i)
432			free (cs[i]);
433
434			free (cs);
435			}
436
437	pcg	1.1	/----------------------------------------------------------------------
438			* file searching
439			*/
440
441			/* #define DEBUG_SEARCH_PATH */
442
443	root	1.33	#ifdef XPM_BACKGROUND
444	pcg	1.1	/*
445			* search for FILE in the current working directory, and within the
446			* colon-delimited PATHLIST, adding the file extension EXT if required.
447			*
448			* FILE is either semi-colon or zero terminated
449			*/
450			char *
451	pcg	1.7	rxvt_File_search_path (const char pathlist, const char file, const char *ext)
452	pcg	1.1	{
453	pcg	1.5	int maxpath, len;
454			const char p, path;
455			char name[256];
456
457	pcg	1.7	if (!access (file, R_OK)) /* found (plain name) in current directory */
458	root	1.15	return strdup (file);
459	pcg	1.5
460			/* semi-colon delimited */
461	root	1.15	if ((p = strchr (file, ';')))
462	pcg	1.5	len = (p - file);
463			else
464	root	1.15	len = strlen (file);
465	pcg	1.1
466			#ifdef DEBUG_SEARCH_PATH
467	pcg	1.7	getcwd (name, sizeof (name));
468			fprintf (stderr, "pwd: \"%s\"\n", name);
469			fprintf (stderr, "find: \"%.*s\"\n", len, file);
470	pcg	1.1	#endif
471
472	pcg	1.5	/* leave room for an extra '/' and trailing '\0' */
473	root	1.15	maxpath = sizeof (name) - (len + (ext ? strlen (ext) : 0) + 2);
474	pcg	1.5	if (maxpath <= 0)
475			return NULL;
476
477			/* check if we can find it now */
478	root	1.15	strncpy (name, file, len);
479	pcg	1.5	name[len] = '\0';
480
481	pcg	1.7	if (!access (name, R_OK))
482	root	1.15	return strdup (name);
483	pcg	1.5	if (ext)
484			{
485	root	1.15	strcat (name, ext);
486	pcg	1.7	if (!access (name, R_OK))
487	root	1.15	return strdup (name);
488	pcg	1.1	}
489	pcg	1.5	for (path = pathlist; path != NULL && *path != '\0'; path = p)
490			{
491			int n;
492
493			/* colon delimited */
494	root	1.15	if ((p = strchr (path, ':')) == NULL)
495			p = strchr (path, '\0');
496	pcg	1.5
497			n = (p - path);
498			if (*p != '\0')
499			p++;
500
501			if (n > 0 && n <= maxpath)
502			{
503	root	1.15	strncpy (name, path, n);
504	pcg	1.5	if (name[n - 1] != '/')
505			name[n++] = '/';
506			name[n] = '\0';
507	root	1.15	strncat (name, file, len);
508	pcg	1.5
509	pcg	1.7	if (!access (name, R_OK))
510	root	1.15	return strdup (name);
511	pcg	1.5	if (ext)
512			{
513	root	1.15	strcat (name, ext);
514	pcg	1.7	if (!access (name, R_OK))
515	root	1.15	return strdup (name);
516	pcg	1.5	}
517			}
518	pcg	1.1	}
519	pcg	1.5	return NULL;
520	pcg	1.1	}
521
522			char *
523	pcg	1.7	rxvt_File_find (const char file, const char ext, const char *path)
524	pcg	1.1	{
525	pcg	1.5	char *f;
526	pcg	1.1
527	pcg	1.5	if (file == NULL \|\| *file == '\0')
528			return NULL;
529	pcg	1.1
530	root	1.32	f = rxvt_File_search_path (path, file, ext);
531	pcg	1.1
532			#ifdef DEBUG_SEARCH_PATH
533	pcg	1.5	if (f)
534	pcg	1.7	fprintf (stderr, "found: \"%s\"\n", f);
535	pcg	1.1	#endif
536
537	pcg	1.5	return f;
538	pcg	1.1	}
539	root	1.33	#endif
540	pcg	1.1
541	root	1.29	// should not be used in interactive programs, for obvious reasons
542	root	1.28	void rxvt_usleep (int usecs)
543			{
544			#if HAVE_NANOSLEEP
545			struct timespec ts;
546
547			ts.tv_sec = 0;
548			ts.tv_nsec = usecs * 1000;
549			nanosleep (&ts, NULL);
550			#else
551			/* use select for timing */
552			struct timeval tv;
553
554			tv.tv_sec = 0;
555			tv.tv_usec = usecs;
556			select (0, NULL, NULL, NULL, &tv);
557			#endif
558			}
559
560	pcg	1.1	/----------------------- end-of-file (C source) -----------------------/
561	root	1.28