source: text.c @ e3d9c77

barnowl_perlaimdebianowlrelease-1.10release-1.4release-1.5release-1.6release-1.7release-1.8release-1.9
Last change on this file since e3d9c77 was e3d9c77, checked in by James M. Kretchmar <kretch@mit.edu>, 21 years ago
Write owl_text_quote Moved some functions between util.c, text.c and zephyr.c
  • Property mode set to 100644
File size: 7.9 KB
RevLine 
[7d4fbcd]1#include <stdio.h>
2#include <string.h>
3#include <stdlib.h>
4#include "owl.h"
5
[1aee7d9]6static const char fileIdent[] = "$Id$";
7
[ab31454]8int owl_text_truncate_lines(char *out, char *in, int aline, int lines)
9{
[7d4fbcd]10  /* start with line aline (where the first line is 1) and print
11   *  'lines' lines
12   */
13  char *ptr1, *ptr2;
14  int i;
15
16  strcpy(out, "");
17 
18  if (aline==0) aline=1; /* really illegal use */
19
20  /* find the starting line */
21  ptr1=in;
22  if (aline!=1) {
23     for (i=0; i<aline-1; i++) {
24      ptr1=strchr(ptr1, '\n');
25      if (!ptr1) return(-1);
26      ptr1++;
27    }
28  }
29  /* ptr1 now holds the starting point */
30
31  /* copy in the next 'lines' lines */
32  if (lines<1) return(-1);
33 
34  for (i=0; i<lines; i++) {
35    ptr2=strchr(ptr1, '\n');
36    if (!ptr2) {
37      strcat(out, ptr1);
38      return(-1);
39    }
40    strncat(out, ptr1, ptr2-ptr1+1);
41    ptr1=ptr2+1;
42  }
43  return(0);
44}
45
[ab31454]46void owl_text_truncate_cols(char *out, char *in, int acol, int bcol)
47{
[7d4fbcd]48  char *ptr1, *ptr2, *tmpbuff, *last;
49  int len;
50 
51  /* the first column is column 0 */
52
53  /* the message is expected to end in a new line for now */
54
55  tmpbuff=owl_malloc(strlen(in)+20);
56
57  strcpy(tmpbuff, "");
58  last=in+strlen(in)-1;
59  ptr1=in;
60  while (ptr1<last) {
61    ptr2=strchr(ptr1, '\n');
62    if (!ptr2) {
63      /* but this shouldn't happen if we end in a \n */
64      break;
65    }
66   
67    if (ptr2==ptr1) {
68      strcat(tmpbuff, "\n");
69      ptr1++;
70      continue;
71    }
72
73    /* we need to check that we won't run over here */
74    if ( (ptr2-ptr1) < (bcol-acol) ) {
75      len=ptr2-(ptr1+acol);
76    } else {
77      len=bcol-acol;
78    }
79    if ((ptr1+len)>=last) {
80      len-=last-(ptr1+len);
81    }
82
83    strncat(tmpbuff, ptr1+acol, len);
84    strcat(tmpbuff, "\n");
85
86    ptr1=ptr2+1;
87  }
88  strcpy(out, tmpbuff);
89  owl_free(tmpbuff);
90}
91
92
[ab31454]93void owl_text_indent(char *out, char *in, int n)
94{
[7d4fbcd]95  char *ptr1, *ptr2, *last;
96  int i;
97
98  strcpy(out, "");
99
100  last=in+strlen(in)-1;
101  ptr1=in;
102  while (ptr1<=last) {
103    for (i=0; i<n; i++) {
104      strcat(out, " ");
105    }
106    ptr2=strchr(ptr1, '\n');
107    if (!ptr2) {
108      strcat(out, ptr1);
109      break;
110    } else {
111      strncat(out, ptr1, ptr2-ptr1+1);
112    }
113    ptr1=ptr2+1;
114  }
115}
116
[ab31454]117int owl_text_num_lines(char *in)
118{
[7d4fbcd]119  int lines, i;
120
121  lines=0;
122  for (i=0; in[i]!='\0'; i++) {
123    if (in[i]=='\n') lines++;
124  }
125
126  /* if the last char wasn't a \n there's one more line */
127  if (in[i-1]!='\n') lines++;
128
129  return(lines);
130}
131
[3abf28b]132
133/* caller must free the return */
[ab31454]134char *owl_text_htmlstrip(char *in)
135{
[8d24696]136  char *ptr1, *end, *ptr2, *ptr3, *out, *out2;
[3abf28b]137
138  out=owl_malloc(strlen(in)+30);
139  strcpy(out, "");
140
141  ptr1=in;
142  end=in+strlen(in);
143 
144  while(ptr1<end) {
145    /* look for an open bracket */
146    ptr2=strchr(ptr1, '<');
147
[dafd919]148    /* if none, copy in from here to end and exit */
[3abf28b]149    if (ptr2==NULL) {
150      strcat(out, ptr1);
[8d24696]151      break;
[3abf28b]152    }
153
154    /* otherwise copy in everything before the open bracket */
155    if (ptr2>ptr1) {
156      strncat(out, ptr1, ptr2-ptr1);
157    }
158
159    /* find the close bracket */
160    ptr3=strchr(ptr2, '>');
161   
162    /* if there is no close, copy as you are and exit */
163    if (!ptr3) {
164      strcat(out, ptr2);
[8d24696]165      break;
[3abf28b]166    }
167
168    /* look for things we know */
169    if (!strncasecmp(ptr2, "<BODY ", 6) ||
[dafd919]170        !strncasecmp(ptr2, "<FONT", 5) ||
[3abf28b]171        !strncasecmp(ptr2, "<HTML", 5) ||
172        !strncasecmp(ptr2, "</FONT", 6) ||
173        !strncasecmp(ptr2, "</HTML", 6) ||
174        !strncasecmp(ptr2, "</BODY", 6)) {
175
176      /* advance to beyond the angle brakcet and go again */
177      ptr1=ptr3+1;
178      continue;
179    }
[75e3879]180    if (!strncasecmp(ptr2, "<BR>", 4)) {
181      strcat(out, "\n");
182      ptr1=ptr3+1;
183      continue;
184    }
[3abf28b]185
186    /* if it wasn't something we know, copy to the > and  go again */
[75e3879]187    strncat(out, ptr2, ptr3-ptr2+1);
[3abf28b]188    ptr1=ptr3+1;
189  }
[8d24696]190
[e3d9c77]191  out2=owl_text_substitute(out, "&lt;", "<");
[8d24696]192  owl_free(out);
[e3d9c77]193  out=owl_text_substitute(out2, "&gt;", ">");
[8d24696]194  owl_free(out2);
[e3d9c77]195  out2=owl_text_substitute(out, "&amp;", "&");
[8d24696]196  owl_free(out);
[e3d9c77]197  out=owl_text_substitute(out2, "&quot;", "\"");
[8d24696]198  owl_free(out2);
[e3d9c77]199  out2=owl_text_substitute(out, "&nbsp;", " ");
[8d24696]200  owl_free(out);
[e3d9c77]201  out=owl_text_substitute(out2, "&ensp;", "  ");
[8d24696]202  owl_free(out2);
[e3d9c77]203  out2=owl_text_substitute(out, "&emsp;", "   ");
[8d24696]204  owl_free(out);
[e3d9c77]205  out=owl_text_substitute(out2, "&endash;", "--");
[8d24696]206  owl_free(out2);
[e3d9c77]207  out2=owl_text_substitute(out, "&emdash;", "---");
[8d24696]208  owl_free(out);
209
210  return(out2);
[3abf28b]211}
[ab31454]212
213/* caller must free the return */
214char *owl_text_wordwrap(char *in, int col)
215{
216  char *out;
217  int cur, lastspace, len, lastnewline;
218
219  out=owl_strdup(in);
220  len=strlen(in);
221  cur=0;
222  lastspace=-1;
223  lastnewline=-1;
224
225  while (cur<(len-1)) {
226    if (out[cur]==' ') {
227      lastspace=cur;
228      cur++;
229      continue;
230    } else if (out[cur]=='\n') {
231      lastnewline=cur;
232      cur++;
233      continue;
234    }
235
236    /* do we need to wrap? */
237    if ( (cur-(lastnewline+1)) > col ) {
238      if (lastspace==-1 ||
239          (lastnewline>0 && (lastspace<=lastnewline))) {
240        /* we can't help, sorry */
241        cur++;
242        continue;
243      }
244
245      /* turn the last space into a newline */
246      out[lastspace]='\n';
247      lastnewline=lastspace;
248      lastspace=-1;
249      cur++;
250      continue;
251    }
252
253    cur++;
254    continue;
255  }
256  return(out);
257}
[e3d9c77]258
259/* exactly like strstr but case insensitive */
260char *stristr(char *a, char *b)
261{
262  char *x, *y, *ret;
263
264  if ((x=owl_strdup(a))==NULL) return(NULL);
265  if ((y=owl_strdup(b))==NULL) return(NULL);
266  downstr(x);
267  downstr(y);
268  ret=strstr(x, y);
269  if (ret==NULL) {
270    owl_free(x);
271    owl_free(y);
272    return(NULL);
273  }
274  ret=ret-x+a;
275  owl_free(x);
276  owl_free(y);
277  return(ret);
278}
279
280/* return 1 if a string is only whitespace, otherwise 0 */
281int only_whitespace(char *s)
282{
283  int i;
284  for (i=0; s[i]; i++) {
285    if (!isspace((int) s[i])) return(0);
286  }
287  return(1);
288}
289
290char *owl_getquoting(char *line)
291{
292  if (line[0]=='\0') return("'");
293  if (strchr(line, '\'')) return("\"");
294  if (strchr(line, '"')) return("'");
295  if (strchr(line, ' ')) return("'");
296  return("");
297}
298
299/* Return a string with any occurances of 'from' replaced with 'to'.
300 * Does not currently handle backslash quoting, but may in the future.
301 * Caller must free returned string.
302 */
303char *owl_text_substitute(char *in, char *from, char *to)
304{
305 
306  char *out;
307  int   outlen, tolen, fromlen, inpos=0, outpos=0;
308
309  if (!*from) return owl_strdup(in);
310
311  outlen = strlen(in)+1;
312  tolen  = strlen(to);
313  fromlen  = strlen(from);
314  out = malloc(outlen);
315
316  while (in[inpos]) {
317    if (!strncmp(in+inpos, from, fromlen)) {
318      outlen += tolen;
319      out = owl_realloc(out, outlen);
320      strcpy(out+outpos, to);
321      inpos += fromlen;
322      outpos += tolen;
323    } else {
324      out[outpos] = in[inpos];
325      inpos++; outpos++;
326    }
327  }
328  out[outpos] = '\0';
329  return(out);
330}
331
332/* replace all instances of character a in buff with the character
333 * b.  buff must be null terminated.
334 */
335void owl_text_tr(char *buff, char a, char b)
336{
337  int i;
338
339  owl_function_debugmsg("In: %s", buff);
340  for (i=0; buff[i]!='\0'; i++) {
341    if (buff[i]==a) buff[i]=b;
342  }
343  owl_function_debugmsg("Out: %s", buff);
344}
345
346/* Return a string which is like 'in' except that every instance of
347 * any character in 'toquote' found in 'in' is preceeded by the string
348 * 'quotestr'.  For example, owl_text_quote(in, "+*.", "\") would
349 * place a backslash before every '+', '*' or '.' in 'in'.  It is
350 * permissable for a character in 'quotestr' to be in 'toquote'.
351 * On success returns the string, on error returns NULL.
352 */
353char *owl_text_quote(char *in, char *toquote, char *quotestr)
354{
355  int i, x, r, place;
356  int in_len, toquote_len, quotestr_len;
357  char *out;
358
359  in_len=strlen(in);
360  toquote_len=strlen(toquote);
361  quotestr_len=strlen(quotestr);
362  out=owl_malloc((in_len*quotestr_len)+30);
363  place=0;
364  for (i=0; i<in_len; i++) {
365
366    /* check if it's a character that needs quoting */
367    for (x=0; x<toquote_len; x++) {
368      if (in[i]==toquote[x]) {
369        /* quote it */
370        for (r=0; r<quotestr_len; r++) {
371          out[place+r]=quotestr[r];
372        }
373        place+=quotestr_len;
374        break;
375      }
376    }
377
378    /* either way, we now copy over the character */
379    out[place]=in[i];
380    place++;
381  }
382  out[place]='\0';
383  return(out);
384}
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