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Switched to Syntax Highlighting
Line 26:
Line 26:
:unsigned long i;+:unsigned long num_lines, num_rows, lines_to_skip;+:unsigned long row,column;+:FILE *fp;+
−:[errorString setString:@"no error"];+
−:fp = fopen([filename cStringUsingEncoding:NSASCIIStringEncoding],"r");+
−:// set up a line buffer+:LineBuffer *line = NewLineBuffer(1000);+
−:// how many lines in the file+:num_lines = CountLinesInFile(line,fp); +:// count lines rewinds the file, so we're back at the beginning..+:lines_to_skip = NUM_HEADER_LINES;+:num_rows = num_lines – lines_to_skip;+
−:// skip the header lines, if they exist+:for (i=0;i<lines_to_skip;i++) GetNextLine(line,fp); +
−:// read in all the rows and columns+:column = 0;+:for(row=0;row<num_rows;row++) {+::if (GetNextLine(line,fp)) {+:::while (GetNextTabField(line, tabtext)) {+
−::::SetRowColumnText(row,column,tabtext);+::::column++;+:::}+::}+:}+
−:// all the rows have been read in+:// done reading from the file, so dispose of file stuff+:fclose(fp);+:DisposeLineBuffer(line);+
−:return(TRUE);+<blockquote>
−<tt> typedef struct {
+:unsigned long max; // maximum size of the line (i.e. size of buffer pointed to by text)+:char *text; // the buffer that contains the last line read from the file+:char *textptr; // for internal use; a ptr to the start of the next tab field+:char *textend; // for internal use; a pointer to the end of the line+:unsigned long length; // the length of the line, ie. the number of characters that were read in from the file+:char *buffer_ptr; // points to start of next line in a buffer -- initialized by SetBuffer+:unsigned long buffer_size; // the total number of characters in the buffer -- initialized by SetBuffer+} LineBuffer;
−</tt>
−</blockquote>
==Example Code==
==Example Code==
−<tt>
+<syntaxhighlight lang=objective-c>
−- (BOOL)readFile:(NSString *)filename returnError:(NSMutableString *)errorString
- (BOOL)readFile:(NSString *)filename returnError:(NSMutableString *)errorString
{
{
− unsigned long i;
− unsigned long num_lines, num_rows, lines_to_skip;
− unsigned long row,column;
− FILE *fp;
[errorString setString:@"no error"];
fp = fopen([filename cStringUsingEncoding:NSASCIIStringEncoding],"r");
// set up a line buffer
− LineBuffer *line = NewLineBuffer(1000);
// how many lines in the file
− num_lines = CountLinesInFile(line,fp);
− // count lines rewinds the file, so we're back at the beginning..
− lines_to_skip = NUM_HEADER_LINES;
− num_rows = num_lines – lines_to_skip;
// skip the header lines, if they exist
− for (i=0;i<lines_to_skip;i++) GetNextLine(line,fp);
// read in all the rows and columns
− column = 0;
− for(row=0;row<num_rows;row++) {
− if (GetNextLine(line,fp)) {
− while (GetNextTabField(line, tabtext)) {
SetRowColumnText(row,column,tabtext);
− column++;
− }
− }
− }
// all the rows have been read in
− // done reading from the file, so dispose of file stuff
− fclose(fp);
− DisposeLineBuffer(line);
return(TRUE);
}
}
−</tt>
+</syntaxhighlight>
==LineBuffer data structure==
==LineBuffer data structure==
−<syntaxhighlight lang=objective-c>
+typedef struct {
− unsigned long max; // maximum size of the line (i.e. size of buffer pointed to by text)
− char *text; // the buffer that contains the last line read from the file
− char *textptr; // for internal use; a ptr to the start of the next tab field
− char *textend; // for internal use; a pointer to the end of the line
− unsigned long length; // the length of the line, ie. the number of characters that were read in from the file
− char *buffer_ptr; // points to start of next line in a buffer -- initialized by SetBuffer
− unsigned long buffer_size; // the total number of characters in the buffer -- initialized by SetBuffer
+} LineBuffer;
+</syntaxhighlight>
−==Routines==
==Routines==