cvs/diff/io.c

79 /* Get ready to read the current file.
84 sip (current, skip_test)
85      struct file_data *current;
89   if (current->desc < 0)
92       current->bufsize = sizeof (word);
93       current->buffer = xmalloc (current->bufsize);
97       current->bufsize = STAT_BLOCKSIZE (current->stat);
98       current->buffer = xmalloc (current->bufsize);
104 	  int oldmode = setmode (current->desc, O_BINARY);
106 	  ssize_t n = read (current->desc, current->buffer, current->bufsize);
108 	    pfatal_with_name (current->name);
109 	  current->buffered_chars = n;
113 	      if (lseek (current->desc, - (off_t) n, SEEK_CUR) == -1)
114 		pfatal_with_name (current->name);
115 	      setmode (current->desc, oldmode);
116 	      current->buffered_chars = 0;
119 	  return binary_file_p (current->buffer, n);
123   current->buffered_chars = 0;
127 /* Slurp the rest of the current file completely into memory.  */
130 slurp (current)
131      struct file_data *current;
135   if (current->desc < 0)
138   else if (S_ISREG (current->stat.st_mode))
144       cc = current->stat.st_size + 1 + sizeof (word);
145       if (current->bufsize < cc)
147 	  current->bufsize = cc;
148 	  current->buffer = xrealloc (current->buffer, cc);
151       if (current->buffered_chars < current->stat.st_size)
153 	  cc = read (current->desc,
154 		     current->buffer + current->buffered_chars,
155 		     current->stat.st_size - current->buffered_chars);
157 	    pfatal_with_name (current->name);
158 	  current->buffered_chars += cc;
162   else if (always_text_flag || current->buffered_chars != 0)
166 	  if (current->buffered_chars == current->bufsize)
168 	      current->bufsize = current->bufsize * 2;
169 	      current->buffer = xrealloc (current->buffer, current->bufsize);
171 	  cc = read (current->desc,
172 		     current->buffer + current->buffered_chars,
173 		     current->bufsize - current->buffered_chars);
177 	    pfatal_with_name (current->name);
178 	  current->buffered_chars += cc;
181       current->bufsize = current->buffered_chars + 1 + sizeof (word);
182       current->buffer = xrealloc (current->buffer, current->bufsize);
191 find_and_hash_each_line (current)
192      struct file_data *current;
195   unsigned char const *p = (unsigned char const *) current->prefix_end;
201   char const **linbuf = current->linbuf;
202   int alloc_lines = current->alloc_lines;
204   int linbuf_base = current->linbuf_base;
209   char const *suffix_begin = current->suffix_begin;
210   char const *bufend = current->buffer + current->buffered_chars;
288 	  && current->missing_newline
347   current->buffered_lines = line;
378   current->linbuf = linbuf;
379   current->valid_lines = line;
380   current->alloc_lines = alloc_lines;
381   current->equivs = cureqs;
393 prepare_text_end (current)
394      struct file_data *current;
396   size_t buffered_chars = current->buffered_chars;
397   char *p = current->buffer;
400     current->missing_newline = 0;
404       current->buffered_chars = buffered_chars;
405       current->missing_newline = 1;