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Diffstat (limited to 'testsuite/gna/issue795/file_reader_pkg.vhdl')
| -rw-r--r-- | testsuite/gna/issue795/file_reader_pkg.vhdl | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/testsuite/gna/issue795/file_reader_pkg.vhdl b/testsuite/gna/issue795/file_reader_pkg.vhdl new file mode 100644 index 000000000..99e167ac9 --- /dev/null +++ b/testsuite/gna/issue795/file_reader_pkg.vhdl @@ -0,0 +1,205 @@ +library ieee; +--! Standard packages +use ieee.Std_logic_1164.all; +use ieee.Numeric_std.all; +--! Implicit use of std libary +--library std; +use std.textio.all; +-- +-- unit name: csv_file_reader package +-- +--! @brief Package contains functions to read CSV file +--! +--! @author Ricardo Jasinski +--! +--! @version 2.0 +--! +--! @details +--! CSV Reader package taken from Web +--! Latest commit 4e2d20f on 10 Sep 2013 +--! Public license - no guarrentee +--! https://github.com/ricardo-jasinski/vhdl-csv-file-reader +--! +--! Modifications by CL add to include function to read HEX numberes +-- 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 csv_file_reader_pkg is + -- Maximum string length for read operations + constant LINE_LENGTH_MAX : integer := 256; + -- file reader type + type csv_file_reader_type is protected + -- Open the CSV text file to be used for subsequent read operations + procedure initialize(file_pathname : string); + -- 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 and convert it to an integer + impure function read_integer return integer; + -- Read a string from the csv file as an hex number and convert it to an integer + -- convert to a unsigned integer depending if MSB is set + impure function read_hex return integer; + -- Read a string from the csv file and convert it to real + impure function read_real return real; + -- Read a string from the csv file and convert it to boolean + impure function read_boolean return boolean; + -- Read a string with a numeric value from the csv file and convert it to a boolean + impure function read_integer_as_boolean return boolean; + -- Read a string from the csv file, until a separator character ',' is found + impure function read_string return string; + -- True when the end of the CSV file was reached + impure function end_of_file return boolean; + end protected; +end; + +package body csv_file_reader_pkg 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; + + -- 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; + + -- 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; + + -- 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; + + -- Skip a separator (comma character) in the current line + procedure skip_separator is + variable dummy_string : string(1 to LINE_LENGTH_MAX); + begin + dummy_string := read_string; + end; + + -- Read a string from the csv file and convert it to integer + impure function read_integer return integer is + variable read_value : integer; + begin + -- read(current_line, read_value); + skip_separator; + return read_value; + end; + + -- Read a string from the csv file and assume it is Hex value + impure function read_hex return integer is + variable return_integer : integer := 0; + variable char_val : integer := 0; + variable read_char : character; + variable read_ok : boolean := true; + begin + -- read(current_line, read_char, read_ok); + while read_ok loop + if read_char = ',' then + return return_integer; + else + return_integer := return_integer * 16; + if read_char >= 'a' and read_char <= 'f' then + char_val := (character'pos(read_char) - character'pos('a')) + 10; + elsif read_char >= 'A' and read_char <= 'F' then + char_val := (character'pos(read_char) - character'pos('A')) + 10; + else + char_val := (character'pos(read_char) - character'pos('0')); + end if; + return_integer := return_integer + char_val; + end if; + -- read(current_line, read_char, read_ok); + end loop; + return read_integer; + end; + + -- Read a string from the csv file and convert it to real + impure function read_real return real is + variable read_value : real; + begin + read(current_line, read_value); + skip_separator; + return read_value; + end; + + -- Read a string from the csv file and convert it to boolean + impure function read_boolean return boolean is + begin + return boolean'value(read_string); + end; + + impure function read_integer_as_boolean return boolean is + begin + return (read_integer /= 0); + end; + + -- Read a string from the csv file, until a separator character ',' is found + -- Delimeter "" used if first and last char + 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 read_delim : boolean := false; + variable index : integer := 0; + begin + read(current_line, read_char, read_ok); + while read_ok loop + case index is + when 0 => + if read_char = ',' then + return return_string; + elsif read_char = '"' then + index := 1; + read_delim := true; + else + return_string(1) := read_char; + index := 2; + end if; + when -1 => + if read_char = ',' then + return return_string; + else + read_delim := false; + end if; + when others => + if read_delim and read_char = '"' then + index := -1; + read_delim := false; + elsif not read_delim and read_char = ',' then + return return_string; + else + return_string(index) := read_char; + index := index + 1; + end if; + end case; + read(current_line, read_char, read_ok); + end loop; + return "Exit"; + end; + end protected body; + +end; + |