Add reproducer for #794

1 files changed, 81 insertions, 0 deletions

diff --git a/testsuite/gna/issue794/example.vhdl b/testsuite/gna/issue794/example.vhdl
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+use std.textio.all;
+-- Original Source: https://github.com/ricardo-jasinski/vhdl-csv-file-reader/
+-- Original Author: Ricardo Jasinski
+-- Define operations to read formatted data from a comma-separated-values file
+-- (CSV file). To use this package:
+--    1. Create a csv_file_reader:      variable csv: csv_file_reader_type;
+--    2. Open a csv file:               csv.initialize("c:\file.csv");
+--    3. Read one line at a time:       csv.readline;
+--    4. Start reading values:          my_integer := csv.read_integer;
+--    5. To read more values in the same line, call any of the read_* functions
+--    6. To move to the next line, call csv.readline() again
+package crashExample is
+    type csv_file_reader_type is protected
+        -- Open the CSV text file to be used for subsequent read operations
+        procedure initialize(file_pathname: string);
+        -- True when the end of the CSV file was reached
+        impure function end_of_file return boolean;
+        -- Release (close) the associated CSV file
+        procedure dispose;
+        -- Read one line from the csv file, and keep it in the cache
+        procedure readline;
+        -- Read a string from the csv file, until a separator character ',' is found
+        impure function read_string return string;
+    end protected;
+end;
+
+package body crashExample is
+
+    type csv_file_reader_type is protected body
+        file my_csv_file: text;
+        -- cache one line at a time for read operations
+        variable current_line: line;
+        -- true when end of file was reached and there are no more lines to read
+        variable end_of_file_reached: boolean;
+        
+        -- Maximum string length for read operations
+        constant LINE_LENGTH_MAX: integer := 256;
+
+        -- Open the CSV text file to be used for subsequent read operations
+        procedure initialize(file_pathname: string) is begin
+            file_open(my_csv_file, file_pathname, READ_MODE);
+            end_of_file_reached := false;
+        end;
+
+        -- True when the end of the CSV file was reached
+        impure function end_of_file return boolean is begin
+            return end_of_file_reached;
+        end;
+        
+        -- Release (close) the associated CSV file
+        procedure dispose is begin
+            file_close(my_csv_file);
+        end;
+        
+        -- Read one line from the csv file, and keep it in the cache
+        procedure readline is begin
+            readline(my_csv_file, current_line);
+            end_of_file_reached := endfile(my_csv_file);
+        end;
+ 
+        -- Read a string from the csv file, until a separator character ',' is found
+        impure function read_string return string is
+            variable return_string: string(1 to LINE_LENGTH_MAX);
+            variable read_char: character;
+            variable read_ok: boolean := true;
+            variable index: integer := 1;
+        begin
+        	read(current_line, read_char, read_ok);
+        	while read_ok loop
+                if read_char = ',' then
+                    return return_string;
+                else
+                    return_string(index) := read_char;
+                    index := index + 1;
+                end if;
+                read(current_line, read_char, read_ok);
+            end loop;
+        end;
+    end protected body;
+
+end;