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/cvs/rxvt-unicode/src/misc.C
Revision: 1.1
Committed: Mon Nov 24 17:28:08 2003 UTC (20 years, 6 months ago) by pcg
Content type: text/plain
Branch: MAIN
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# User Rev Content
1 pcg 1.1 /*--------------------------------*-C-*---------------------------------*
2     * File: misc.c
3     *----------------------------------------------------------------------*
4     * $Id: misc.C,v 1.1 2003/11/18 14:22:17 root Exp $
5     *
6     * All portions of code are copyright by their respective author/s.
7     * Copyright (c) 1996 mj olesen <olesen@me.QueensU.CA> Queen's Univ at Kingston
8     * Copyright (c) 1997,1998 Oezguer Kesim <kesim@math.fu-berlin.de>
9     * Copyright (c) 1998-2000 Geoff Wing <gcw@pobox.com>
10     *
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     #include "misc.intpro" /* PROTOS for internal routines */
29    
30     /* EXTPROTO */
31     char *
32     rxvt_r_basename(const char *str)
33     {
34     char *base = STRRCHR(str, '/');
35    
36     return (char *)(base ? base + 1 : str);
37     }
38    
39     /*
40     * Print an error message
41     */
42     /* EXTPROTO */
43     void
44     rxvt_print_error(const char *fmt,...)
45     {
46     va_list arg_ptr;
47    
48     va_start(arg_ptr, fmt);
49     fprintf(stderr, APL_NAME ": ");
50     vfprintf(stderr, fmt, arg_ptr);
51     fprintf(stderr, "\n");
52     va_end(arg_ptr);
53     }
54    
55     /*
56     * check that the first characters of S1 match S2
57     *
58     * No Match
59     * return: 0
60     * Match
61     * return: STRLEN (S2)
62     */
63     /* EXTPROTO */
64     int
65     rxvt_Str_match(const char *s1, const char *s2)
66     {
67     int n = STRLEN(s2);
68    
69     return ((STRNCMP(s1, s2, n) == 0) ? n : 0);
70     }
71    
72     /* EXTPROTO */
73     const char *
74     rxvt_Str_skip_space(const char *str)
75     {
76     if (str)
77     while (*str && isspace(*str))
78     str++;
79     return str;
80     }
81    
82     /*
83     * remove leading/trailing space and strip-off leading/trailing quotes.
84     * in place.
85     */
86     /* EXTPROTO */
87     char *
88     rxvt_Str_trim(char *str)
89     {
90     char *r, *s;
91     int n;
92    
93     if (!str || !*str) /* shortcut */
94     return str;
95    
96     /* skip leading spaces */
97     for (s = str; *s && isspace(*s); s++) ;
98     /* goto end of string */
99     for (n = 0, r = s; *r++; n++) ;
100     r -= 2;
101     /* dump return */
102     if (n > 0 && *r == '\n')
103     n--, r--;
104     /* backtrack along trailing spaces */
105     for (; n > 0 && isspace(*r); r--, n--) ;
106     /* skip matching leading/trailing quotes */
107     if (*s == '"' && *r == '"' && n > 1) {
108     s++;
109     n -= 2;
110     }
111     /* copy back over: forwards copy */
112     for (r = str; n; n--)
113     *r++ = *s++;
114     *r = '\0';
115    
116     return str;
117     }
118    
119     /*
120     * in-place interpretation of string:
121     *
122     * backslash-escaped: "\a\b\E\e\n\r\t", "\octal"
123     * Ctrl chars: ^@ .. ^_, ^?
124     *
125     * Emacs-style: "M-" prefix
126     *
127     * Also,
128     * "M-x" prefixed strings, append "\r" if needed
129     * "\E]" prefixed strings (XTerm escape sequence) append ST if needed
130     *
131     * returns the converted string length
132     */
133     /* EXTPROTO */
134     int
135     rxvt_Str_escaped(char *str)
136     {
137     char ch, *s, *d;
138     int i, num, append = 0;
139    
140     if (!str || !*str)
141     return 0;
142    
143     d = s = str;
144    
145     if (*s == 'M' && s[1] == '-') {
146     /* Emacs convenience, replace leading `M-..' with `\E..' */
147     *d++ = C0_ESC;
148     s += 2;
149     if (toupper(*s) == 'X')
150     /* append carriage-return for `M-xcommand' */
151     for (*d++ = 'x', append = '\r', s++; isspace(*s); s++) ;
152     }
153     for (; (ch = *s++);) {
154     if (ch == '\\') {
155     ch = *s++;
156     if (ch >= '0' && ch <= '7') { /* octal */
157     num = ch - '0';
158     for (i = 0; i < 2; i++, s++) {
159     ch = *s;
160     if (ch < '0' || ch > '7')
161     break;
162     num = num * 8 + ch - '0';
163     }
164     ch = (char)num;
165     } else if (ch == 'a')
166     ch = C0_BEL; /* bell */
167     else if (ch == 'b')
168     ch = C0_BS; /* backspace */
169     else if (ch == 'E' || ch == 'e')
170     ch = C0_ESC; /* escape */
171     else if (ch == 'n')
172     ch = '\n'; /* newline */
173     else if (ch == 'r')
174     ch = '\r'; /* carriage-return */
175     else if (ch == 't')
176     ch = C0_HT; /* tab */
177     } else if (ch == '^') {
178     ch = *s++;
179     ch = toupper(ch);
180     ch = (ch == '?' ? 127 : (ch - '@'));
181     }
182     *d++ = ch;
183     }
184    
185     /* ESC] is an XTerm escape sequence, must be terminated */
186     if (*str == '\0' && str[1] == C0_ESC && str[2] == ']')
187     append = CHAR_ST;
188    
189     /* add trailing character as required */
190     if (append && d[-1] != append)
191     *d++ = append;
192     *d = '\0';
193    
194     return (d - str);
195     }
196    
197     /*
198     * Split a comma-separated string into an array, stripping leading and
199     * trailing spaces (and paired quotes) from each entry. Empty strings
200     * are properly returned
201     * Caller should free each entry and array when done
202     */
203     /* EXTPROTO */
204     char **
205     rxvt_splitcommastring(const char *cs)
206     {
207     int l, n, p;
208     const char *s, *t;
209     char **ret;
210    
211     if ((s = cs) == NULL)
212     s = "";
213    
214     for (n = 1, t = s; *t; t++)
215     if (*t == ',')
216     n++;
217     ret = (char **)malloc((n + 1) * sizeof(char *));
218     ret[n] = NULL;
219    
220     for (l = 0, t = s; l < n; l++) {
221     for ( ; *t && *t != ','; t++) ;
222     p = t - s;
223     ret[l] = (char *)malloc(p + 1);
224     strncpy(ret[l], s, p);
225     ret[l][p] = '\0';
226     rxvt_Str_trim(ret[l]);
227     s = ++t;
228     }
229     return ret;
230     }
231    
232     /*----------------------------------------------------------------------*
233     * file searching
234     */
235    
236     /* #define DEBUG_SEARCH_PATH */
237    
238     #if defined (XPM_BACKGROUND) || (MENUBAR_MAX)
239     /*
240     * search for FILE in the current working directory, and within the
241     * colon-delimited PATHLIST, adding the file extension EXT if required.
242     *
243     * FILE is either semi-colon or zero terminated
244     */
245     /* INTPROTO */
246     char *
247     rxvt_File_search_path(const char *pathlist, const char *file, const char *ext)
248     {
249     int maxpath, len;
250     const char *p, *path;
251     char name[256];
252    
253     if (!access(file, R_OK)) /* found (plain name) in current directory */
254     return STRDUP(file);
255    
256     /* semi-colon delimited */
257     if ((p = STRCHR(file, ';')))
258     len = (p - file);
259     else
260     len = STRLEN(file);
261    
262     #ifdef DEBUG_SEARCH_PATH
263     getcwd(name, sizeof(name));
264     fprintf(stderr, "pwd: \"%s\"\n", name);
265     fprintf(stderr, "find: \"%.*s\"\n", len, file);
266     #endif
267    
268     /* leave room for an extra '/' and trailing '\0' */
269     maxpath = sizeof(name) - (len + (ext ? STRLEN(ext) : 0) + 2);
270     if (maxpath <= 0)
271     return NULL;
272    
273     /* check if we can find it now */
274     STRNCPY(name, file, len);
275     name[len] = '\0';
276    
277     if (!access(name, R_OK))
278     return STRDUP(name);
279     if (ext) {
280     STRCAT(name, ext);
281     if (!access(name, R_OK))
282     return STRDUP(name);
283     }
284     for (path = pathlist; path != NULL && *path != '\0'; path = p) {
285     int n;
286    
287     /* colon delimited */
288     if ((p = STRCHR(path, ':')) == NULL)
289     p = STRCHR(path, '\0');
290    
291     n = (p - path);
292     if (*p != '\0')
293     p++;
294    
295     if (n > 0 && n <= maxpath) {
296     STRNCPY(name, path, n);
297     if (name[n - 1] != '/')
298     name[n++] = '/';
299     name[n] = '\0';
300     STRNCAT(name, file, len);
301    
302     if (!access(name, R_OK))
303     return STRDUP(name);
304     if (ext) {
305     STRCAT(name, ext);
306     if (!access(name, R_OK))
307     return STRDUP(name);
308     }
309     }
310     }
311     return NULL;
312     }
313    
314     /* EXTPROTO */
315     char *
316     rxvt_File_find(const char *file, const char *ext, const char *path)
317     {
318     char *f;
319    
320     if (file == NULL || *file == '\0')
321     return NULL;
322    
323     /* search environment variables here too */
324     if ((f = rxvt_File_search_path(path, file, ext)) == NULL)
325     #ifdef PATH_ENV
326     if ((f = rxvt_File_search_path(getenv(PATH_ENV), file, ext)) == NULL)
327     #endif
328     f = rxvt_File_search_path(getenv("PATH"), file, ext);
329    
330     #ifdef DEBUG_SEARCH_PATH
331     if (f)
332     fprintf(stderr, "found: \"%s\"\n", f);
333     #endif
334    
335     return f;
336     }
337     #endif /* defined (XPM_BACKGROUND) || (MENUBAR_MAX) */
338    
339     /*----------------------------------------------------------------------*
340     * miscellaneous drawing routines
341     */
342    
343     /*
344     * Draw top/left and bottom/right border shadows around windows
345     */
346     #if defined(RXVT_SCROLLBAR) || defined(MENUBAR)
347     /* EXTPROTO */
348     void
349     rxvt_Draw_Shadow(Display *Xdisplay, Window win, GC topShadow, GC botShadow, int x, int y, int w, int h)
350     {
351     int shadow;
352    
353     shadow = (w == 0 || h == 0) ? 1 : SHADOW;
354     w += x - 1;
355     h += y - 1;
356     for (; shadow-- > 0; x++, y++, w--, h--) {
357     XDrawLine(Xdisplay, win, topShadow, x, y, w, y);
358     XDrawLine(Xdisplay, win, topShadow, x, y, x, h);
359     XDrawLine(Xdisplay, win, botShadow, w, h, w, y + 1);
360     XDrawLine(Xdisplay, win, botShadow, w, h, x + 1, h);
361     }
362     }
363     #endif
364    
365     /* button shapes */
366     #ifdef MENUBAR
367     /* EXTPROTO */
368     void
369     rxvt_Draw_Triangle(Display *Xdisplay, Window win, GC topShadow, GC botShadow, int x, int y, int w, int type)
370     {
371     switch (type) {
372     case 'r': /* right triangle */
373     XDrawLine(Xdisplay, win, topShadow, x, y, x, y + w);
374     XDrawLine(Xdisplay, win, topShadow, x, y, x + w, y + w / 2);
375     XDrawLine(Xdisplay, win, botShadow, x, y + w, x + w, y + w / 2);
376     break;
377    
378     case 'l': /* left triangle */
379     XDrawLine(Xdisplay, win, botShadow, x + w, y + w, x + w, y);
380     XDrawLine(Xdisplay, win, botShadow, x + w, y + w, x, y + w / 2);
381     XDrawLine(Xdisplay, win, topShadow, x, y + w / 2, x + w, y);
382     break;
383    
384     case 'd': /* down triangle */
385     XDrawLine(Xdisplay, win, topShadow, x, y, x + w / 2, y + w);
386     XDrawLine(Xdisplay, win, topShadow, x, y, x + w, y);
387     XDrawLine(Xdisplay, win, botShadow, x + w, y, x + w / 2, y + w);
388     break;
389    
390     case 'u': /* up triangle */
391     XDrawLine(Xdisplay, win, botShadow, x + w, y + w, x + w / 2, y);
392     XDrawLine(Xdisplay, win, botShadow, x + w, y + w, x, y + w);
393     XDrawLine(Xdisplay, win, topShadow, x, y + w, x + w / 2, y);
394     break;
395     #if 0
396     case 's': /* square */
397     XDrawLine(Xdisplay, win, topShadow, x + w, y, x, y);
398     XDrawLine(Xdisplay, win, topShadow, x, y, x, y + w);
399     XDrawLine(Xdisplay, win, botShadow, x, y + w, x + w, y + w);
400     XDrawLine(Xdisplay, win, botShadow, x + w, y + w, x + w, y);
401     break;
402     #endif
403     }
404     }
405     #endif
406     /*----------------------- end-of-file (C source) -----------------------*/