/* PSPP - a program for statistical analysis.
- Copyright (C) 2023 Free Software Foundation, Inc.
-
- This program is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>. */
-
-use anyhow::{anyhow, Result};
+ * Copyright (C) 2023 Free Software Foundation, Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+use anyhow::Result;
use clap::Parser;
-use hexplay::HexViewBuilder;
-use num::{Float, Num};
-use std::{fmt, num::FpCategory};
+use pspp::{raw::{Reader, Record}, locale_charset::locale_charset};
use std::fs::File;
-use std::io::prelude::*;
use std::io::BufReader;
use std::path::{Path, PathBuf};
+use std::str;
/// A utility to dissect SPSS system files.
#[derive(Parser, Debug)]
struct Args {
/// Maximum number of cases to print.
#[arg(long = "data", default_value_t = 0)]
- max_cases: usize,
+ max_cases: u64,
/// Files to dissect.
#[arg(required = true)]
- files: Vec<PathBuf>
+ files: Vec<PathBuf>,
}
fn main() -> Result<()> {
+ println!("locale_charset={}", locale_charset());
let Args { max_cases, files } = Args::parse();
for file in files {
- Dissector::new(file)?;
+ dissect(&file, max_cases)?;
}
Ok(())
}
-#[derive(Copy, Clone, Debug)]
-enum Compression {
- Simple,
- ZLib
-}
-
-#[derive(Copy, Clone, Debug)]
-enum Endianness {
- BigEndian,
- LittleEndian
-}
-use Endianness::*;
-
-trait Parse<T, const N: usize> {
- fn parse(self, bytes: [u8; N]) -> T;
-}
-impl Parse<u64, 8> for Endianness {
- fn parse(self, bytes: [u8; 8]) -> u64 {
- match self {
- BigEndian => u64::from_be_bytes(bytes),
- LittleEndian => u64::from_le_bytes(bytes)
- }
- }
-}
-impl Parse<u32, 4> for Endianness {
- fn parse(self, bytes: [u8; 4]) -> u32 {
- match self {
- BigEndian => u32::from_be_bytes(bytes),
- LittleEndian => u32::from_le_bytes(bytes)
- }
- }
-}
-impl Parse<u16, 2> for Endianness {
- fn parse(self, bytes: [u8; 2]) -> u16 {
- match self {
- BigEndian => u16::from_be_bytes(bytes),
- LittleEndian => u16::from_le_bytes(bytes)
- }
- }
-}
-impl Parse<u8, 1> for Endianness {
- fn parse(self, bytes: [u8; 1]) -> u8 {
- match self {
- BigEndian => u8::from_be_bytes(bytes),
- LittleEndian => u8::from_le_bytes(bytes)
- }
- }
-}
-impl Parse<i64, 8> for Endianness {
- fn parse(self, bytes: [u8; 8]) -> i64 {
- match self {
- BigEndian => i64::from_be_bytes(bytes),
- LittleEndian => i64::from_le_bytes(bytes)
- }
- }
-}
-impl Parse<i32, 4> for Endianness {
- fn parse(self, bytes: [u8; 4]) -> i32 {
- match self {
- BigEndian => i32::from_be_bytes(bytes),
- LittleEndian => i32::from_le_bytes(bytes)
- }
- }
-}
-impl Parse<i16, 2> for Endianness {
- fn parse(self, bytes: [u8; 2]) -> i16 {
- match self {
- BigEndian => i16::from_be_bytes(bytes),
- LittleEndian => i16::from_le_bytes(bytes)
- }
- }
-}
-impl Parse<i8, 1> for Endianness {
- fn parse(self, bytes: [u8; 1]) -> i8 {
- match self {
- BigEndian => i8::from_be_bytes(bytes),
- LittleEndian => i8::from_le_bytes(bytes)
- }
- }
-}
-impl Parse<f64, 8> for Endianness {
- fn parse(self, bytes: [u8; 8]) -> f64 {
- match self {
- BigEndian => f64::from_be_bytes(bytes),
- LittleEndian => f64::from_le_bytes(bytes)
- }
- }
-}
-
-fn read_bytes<const N: usize>(r: &mut BufReader<File>) -> Result<[u8; N]> {
- let mut buf = [0; N];
- r.read_exact(&mut buf)?;
- Ok(buf)
-}
-
-fn read_vec(r: &mut BufReader<File>, n: usize) -> Result<Vec<u8>> {
- let mut vec = Vec::with_capacity(n);
- vec.resize(n, 0);
- r.read_exact(&mut vec)?;
- Ok(vec)
-}
-
-trait ReadSwap<T> {
- fn read_swap(&mut self) -> Result<T>;
-}
-
-impl ReadSwap<u32> for Dissector {
- fn read_swap(&mut self) -> Result<u32> {
- Ok(self.endianness.parse(read_bytes(&mut self.r)?))
- }
-}
-impl ReadSwap<u8> for Dissector {
- fn read_swap(&mut self) -> Result<u8> {
- Ok(self.endianness.parse(read_bytes(&mut self.r)?))
- }
-}
-
-impl ReadSwap<i32> for Dissector {
- fn read_swap(&mut self) -> Result<i32> {
- Ok(self.endianness.parse(read_bytes(&mut self.r)?))
- }
-}
-
-impl ReadSwap<f64> for Dissector {
- fn read_swap(&mut self) -> Result<f64> {
- Ok(self.endianness.parse(read_bytes(&mut self.r)?))
- }
-}
-
-struct Dissector {
- filename: String,
- r: BufReader<File>,
- compression: Option<Compression>,
- endianness: Endianness,
- fp_format: Endianness,
- bias: f64,
- n_variable_records: usize,
- n_variables: usize,
- var_widths: Vec<i32>,
-}
-
-fn detect_endianness(layout_code: [u8; 4]) -> Option<Endianness> {
- for endianness in [BigEndian, LittleEndian] {
- match endianness.parse(layout_code) {
- 2 | 3 => return Some(endianness),
- _ => ()
- }
- }
- None
-}
-
-fn detect_fp_format(bias: [u8; 8]) -> Option<Endianness> {
- for endianness in [BigEndian, LittleEndian] {
- let value: f64 = endianness.parse(bias);
- if value == 100.0 {
- return Some(endianness)
- }
- }
- None
-}
-
-fn trim_end(mut s: Vec<u8>, c: u8) -> Vec<u8> {
- while s.last() == Some(&c) {
- s.pop();
- }
- s
-}
-
-fn slice_trim_end(mut s: &[u8], c: u8) -> &[u8] {
- while s.last() == Some(&c) {
- s = s.split_last().unwrap().1;
- }
- s
-}
-
-fn format_name(type_: u32) -> &'static str {
- match type_ {
- 1 => "A",
- 2 => "AHEX",
- 3 => "COMMA",
- 4 => "DOLLAR",
- 5 => "F",
- 6 => "IB",
- 7 => "PIBHEX",
- 8 => "P",
- 9 => "PIB",
- 10 => "PK",
- 11 => "RB",
- 12 => "RBHEX",
- 15 => "Z",
- 16 => "N",
- 17 => "E",
- 20 => "DATE",
- 21 => "TIME",
- 22 => "DATETIME",
- 23 => "ADATE",
- 24 => "JDATE",
- 25 => "DTIME",
- 26 => "WKDAY",
- 27 => "MONTH",
- 28 => "MOYR",
- 29 => "QYR",
- 30 => "WKYR",
- 31 => "PCT",
- 32 => "DOT",
- 33 => "CCA",
- 34 => "CCB",
- 35 => "CCC",
- 36 => "CCD",
- 37 => "CCE",
- 38 => "EDATE",
- 39 => "SDATE",
- 40 => "MTIME",
- 41 => "YMDHMS",
- _ => "invalid"
- }
-}
-
-fn round_up<T: Num + Copy>(x: T, y: T) -> T
-{
- (x + (y - T::one())) / y * y
-}
-
-struct UntypedValue {
- raw: [u8; 8],
- endianness: Endianness
-}
+fn dissect(file_name: &Path, max_cases: u64) -> Result<()> {
+ let reader = File::open(file_name)?;
+ let reader = BufReader::new(reader);
+ let mut reader = Reader::new(reader)?;
+ let records: Vec<Record> = reader.collect_headers()?;
-impl UntypedValue {
- fn new(raw: [u8; 8], endianness: Endianness) -> UntypedValue {
- UntypedValue { raw, endianness }
- }
-}
-
-impl fmt::Display for UntypedValue {
- fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
- let numeric: f64 = self.endianness.parse(self.raw);
- let n_printable = self.raw.iter().take_while(|&&x| x == b' ' || x.is_ascii_graphic()).count();
- let printable_prefix = std::str::from_utf8(&self.raw[0..n_printable]).unwrap();
- write!(f, "{numeric}/\"{printable_prefix}\"")
- }
-}
-
-struct HexFloat<T: Float>(T);
-
-impl<T: Float> fmt::Display for HexFloat<T> {
- fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
- let sign = if self.0.is_sign_negative() { "-" } else { "" };
- match self.0.classify() {
- FpCategory::Nan => return write!(f, "NaN"),
- FpCategory::Infinite => return write!(f, "{sign}Infinity"),
- FpCategory::Zero => return write!(f, "{sign}0.0"),
- _ => (),
+ for record in records {
+ println!("{record:?}");
+ if let Record::EndOfHeaders(_) = record {
+ break;
};
- let (significand, mut exponent, _) = self.0.integer_decode();
- let mut hex_sig = format!("{:x}", significand);
- while hex_sig.ends_with('0') {
- hex_sig.pop();
- exponent += 4;
- }
- match hex_sig.len() {
- 0 => write!(f, "{sign}0.0"),
- 1 => write!(f, "{sign}0x{hex_sig}.0p{exponent}"),
- len => write!(f, "{sign}0x{}.{}p{}",
- hex_sig.chars().nth(0).unwrap(),
- &hex_sig[1..],
- exponent + 4 * (len as i16 - 1))
- }
}
-}
-#[cfg(test)]
-mod hex_float_tests {
- use crate::HexFloat;
- use num::Float;
-
- #[test]
- fn test() {
- assert_eq!(format!("{}", HexFloat(1.0)), "0x1.0p0");
- assert_eq!(format!("{}", HexFloat(123.0)), "0x1.ecp6");
- assert_eq!(format!("{}", HexFloat(1.0 / 16.0)), "0x1.0p-4");
- assert_eq!(format!("{}", HexFloat(f64::infinity())), "Infinity");
- assert_eq!(format!("{}", HexFloat(f64::neg_infinity())), "-Infinity");
- assert_eq!(format!("{}", HexFloat(f64::nan())), "NaN");
- assert_eq!(format!("{}", HexFloat(0.0)), "0.0");
- assert_eq!(format!("{}", HexFloat(f64::neg_zero())), "-0.0");
- }
-}
-
-impl Dissector {
- fn new<P: AsRef<Path>>(filename: P) -> Result<Dissector> {
- let mut r = BufReader::new(File::open(&filename)?);
- let filename = filename.as_ref().to_string_lossy().into_owned();
- let rec_type: [u8; 4] = read_bytes(&mut r)?;
- let zmagic = match &rec_type {
- b"$FL2" => false,
- b"$FL3" => true,
- _ => Err(anyhow!("This is not an SPSS system file."))?
- };
-
- let eye_catcher: [u8; 60] = read_bytes(&mut r)?;
- let layout_code: [u8; 4] = read_bytes(&mut r)?;
- let endianness = detect_endianness(layout_code)
- .ok_or_else(|| anyhow!("This is not an SPSS system file."))?;
- let layout_code: u32 = endianness.parse(layout_code);
- let _nominal_case_size: [u8; 4] = read_bytes(&mut r)?;
- let compressed: u32 = endianness.parse(read_bytes(&mut r)?);
- let compression = match (zmagic, compressed) {
- (false, 0) => None,
- (false, 1) => Some(Compression::Simple),
- (true, 2) => Some(Compression::ZLib),
- _ => Err(anyhow!("{} file header has invalid compression value {compressed}.",
- if zmagic { "ZSAV" } else { "SAV" }))?,
- };
-
- let weight_index: u32 = endianness.parse(read_bytes(&mut r)?);
- let n_cases: u32 = endianness.parse(read_bytes(&mut r)?);
-
- let bias: [u8; 8] = read_bytes(&mut r)?;
- let fp_format = detect_fp_format(bias)
- .unwrap_or_else(|| { eprintln!("Compression bias is not the usual value of 100, or system file uses unrecognized floating-point format."); endianness });
- let bias: f64 = fp_format.parse(bias);
-
- let mut d = Dissector {
- filename,
- r,
- compression,
- endianness,
- fp_format,
- bias,
- n_variable_records: 0,
- n_variables: 0,
- var_widths: Vec::new(),
- };
-
- let creation_date: [u8; 9] = read_bytes(&mut d.r)?;
- let creation_time: [u8; 8] = read_bytes(&mut d.r)?;
- let file_label: [u8; 64] = read_bytes(&mut d.r)?;
- let file_label = trim_end(Vec::from(file_label), b' ');
- d.skip_bytes(3)?;
-
- println!("File header record:");
- println!("{:>17}: {}", "Product name", String::from_utf8_lossy(&eye_catcher));
- println!("{:>17}: {}", "Layout code", layout_code);
- println!("{:>17}: {} ({})", "Compressed", compressed, match compression {
- None => "no compression",
- Some(Compression::Simple) => "simple compression",
- Some(Compression::ZLib) => "ZLIB compression",
- });
- println!("{:>17}: {}", "Weight index", weight_index);
- println!("{:>17}: {}", "Number of cases", n_cases);
- println!("{:>17}: {}", "Compression bias", bias);
- println!("{:>17}: {}", "Creation date", String::from_utf8_lossy(&creation_date));
- println!("{:>17}: {}", "Creation time", String::from_utf8_lossy(&creation_time));
- println!("{:>17}: \"{}\"", "File label", String::from_utf8_lossy(&file_label));
-
- loop {
- let rec_type: u32 = d.read_swap()?;
- match rec_type {
- 2 => d.read_variable_record()?,
- 3 => d.read_value_label_record()?,
- 4 => Err(anyhow!("Misplaced type 4 record."))?,
- 6 => d.read_document_record()?,
- 7 => d.read_extension_record()?,
- 999 => break,
- _ => Err(anyhow!("Unrecognized record type {rec_type}."))?
- }
- }
-
- let pos = d.r.stream_position()?;
- println!("{:08x}: end-of-dictionary record (first byte of data at {:0x})", pos, pos + 4);
-
- Ok(d)
- }
-
- fn read_extension_record(&mut self) -> Result<()> {
- let offset = self.r.stream_position()?;
- let subtype: u32 = self.read_swap()?;
- let size: u32 = self.read_swap()?;
- let count: u32 = self.read_swap()?;
- println!("{offset:08x}: Record 7, subtype {subtype}, size={size}, count={count}");
- match subtype {
- 3 => self.read_machine_integer_info(size, count),
- 4 => self.read_machine_float_info(size, count),
- _ => self.read_unknown_extension(subtype, size, count),
- }
- }
-
- fn warn(&mut self, s: String) -> Result<()> {
- println!("\"{}\" near offset 0x{:08x}: {s}", self.filename, self.r.stream_position()?);
- Ok(())
- }
-
- fn skip_bytes(&mut self, mut n: u64) -> Result<()> {
- let mut buf = [0; 1024];
- while n > 0 {
- let chunk = u64::min(n, buf.len() as u64);
- self.r.read_exact(&mut buf[0..chunk as usize])?;
- n -= chunk;
- }
- Ok(())
- }
-
- fn read_unknown_extension(&mut self, subtype: u32, size: u32, count: u32) -> Result<()> {
- self.warn(format!("Unrecognized record type 7, subtype {subtype}."))?;
- if size == 0 || count > 65536 / size {
- self.skip_bytes(size as u64 * count as u64)?;
- } else if size != 1 {
- let mut offset = 0;
- for _ in 0..count {
- let vec = read_vec(&mut self.r, size as usize)?;
- println!("{}", HexViewBuilder::new(&vec).address_offset(offset).finish());
- offset += size as usize;
- }
- }
- Ok(())
- }
-
- fn read_variable_record(&mut self) -> Result<()> {
- self.n_variable_records += 1;
- println!("{:08x}: variable record {}", self.r.stream_position()?, self.n_variable_records);
- let width: i32 = self.read_swap()?;
- let has_variable_label: u32 = self.read_swap()?;
- let missing_value_code: i32 = self.read_swap()?;
- let print_format: u32 = self.read_swap()?;
- let write_format: u32 = self.read_swap()?;
- let name: [u8; 8] = read_bytes(&mut self.r)?;
- let name: Vec<u8> = trim_end(Vec::from(name), b'\0');
-
- if width >= 0 {
- self.n_variables += 1;
- }
- self.var_widths.push(width);
-
- println!("\tWidth: {width} ({})", match width {
- _ if width > 0 => "string",
- _ if width == 0 => "numeric",
- _ => "long string continuation record"
- });
-
- println!("\tVariable label: {has_variable_label}");
- println!("\tMissing values code: {missing_value_code} ({})",
- match missing_value_code {
- 0 => "no missing values",
- 1 => "one missing value",
- 2 => "two missing values",
- 3 => "three missing values",
- -2 => "one missing value range",
- -3 => "one missing value, one range",
- _ => "bad value"
- });
- for (which, format) in [("Print", print_format),
- ("Worite", write_format)] {
- let type_ = format_name(format >> 16);
- let w = (format >> 8) & 0xff;
- let d = format & 0xff;
- println!("\t{which} format: {format:06x} ({type_}{w}.{d})");
- }
- println!("\tName: {}", String::from_utf8_lossy(&name));
-
- // Read variable label.
- match has_variable_label {
- 0 => (),
- 1 => {
- let offset = self.r.stream_position()?;
- let len: u32 = self.read_swap()?;
- let read_len = len.min(65535) as usize;
- let label = read_vec(&mut self.r, read_len)?;
- println!("\t{offset:08x} Variable label: \"{}\"", String::from_utf8_lossy(&label));
-
- self.skip_bytes((round_up(len, 4) - len).into())?;
- },
- _ => Err(anyhow!("Variable label indicator field is not 0 or 1."))?,
+ for _ in 0..max_cases {
+ let Some(Ok(Record::Case(data))) = reader.next() else {
+ break;
};
-
- // Read missing values.
- if missing_value_code != 0 {
- print!("\t{:08x} Missing values:", self.r.stream_position()?);
- if width == 0 {
- let (has_range, n_individual) = match missing_value_code {
- -3 => (true, 1),
- -2 => (true, 0),
- 1 | 2 | 3 => (false, missing_value_code),
- _ => Err(anyhow!("Numeric missing value indicator field is not -3, -2, 0, 1, 2, or 3."))?,
- };
- if has_range {
- let low: f64 = self.read_swap()?;
- let high: f64 = self.read_swap()?;
- print!(" {low}...{high}");
- }
- for _ in 0..n_individual {
- let value: f64 = self.read_swap()?;
- print!(" {value}");
- }
- } else if width > 0 {
- if missing_value_code < 1 || missing_value_code > 3 {
- Err(anyhow!("String missing value indicator field is not 0, 1, 2, or 3."))?;
- }
- for _ in 0..missing_value_code {
- let string: [u8; 8] = read_bytes(&mut self.r)?;
- let string: Vec<u8> = trim_end(Vec::from(string), b'\0');
- println!(" {}", String::from_utf8_lossy(&string));
- }
- }
- println!();
- }
-
- Ok(())
- }
-
- fn read_value_label_record(&mut self) -> Result<()> {
- println!("{:08x}: value labels record", self.r.stream_position()?);
-
- // Read the labels.
- let n_labels: u32 = self.read_swap()?;
- for _ in 0..n_labels {
- let raw: [u8; 8] = read_bytes(&mut self.r)?;
- let value = UntypedValue::new(raw, self.fp_format);
- let label_len: u8 = self.read_swap()?;
- let padded_len = round_up(label_len as usize + 1, 8);
-
- let mut label = read_vec(&mut self.r, padded_len)?;
- label.truncate(label_len as usize);
- let label = String::from_utf8_lossy(&label);
-
- println!("\t{value}: {label}");
- }
-
- // Read the type-4 record with the corresponding variable indexes.
- let rec_type: u32 = self.read_swap()?;
- if rec_type != 4 {
- Err(anyhow!("Variable index record (type 4) does not immediately \
- follow value label record (type 3) as it should."))?;
- }
-
- println!("\t{:08x}: apply to variables", self.r.stream_position()?);
- let n_vars: u32 = self.read_swap()?;
- for _ in 0..n_vars {
- let index: u32 = self.read_swap()?;
- print!(" {index}");
- }
- println!();
-
- Ok(())
- }
-
- fn read_document_record(&mut self) -> Result<()> {
- println!("{:08x}: document record", self.r.stream_position()?);
- let n_lines: u32 = self.read_swap()?;
- println!("\t{n_lines} lines of documents");
-
- for i in 0..n_lines {
- print!("\t{:08x}: ", self.r.stream_position()?);
- let line: [u8; 64] = read_bytes(&mut self.r)?;
- let line = trim_end(Vec::from(line), b' ');
- println!("line {i}: \"{}\"", String::from_utf8_lossy(&line));
- }
- Ok(())
- }
-
- fn read_machine_integer_info(&mut self, size: u32, count: u32) -> Result<()> {
- let offset = self.r.stream_position()?;
- let version_major: u32 = self.read_swap()?;
- let version_minor: u32 = self.read_swap()?;
- let version_revision: u32 = self.read_swap()?;
- let machine_code: u32 = self.read_swap()?;
- let float_representation: u32 = self.read_swap()?;
- let compression_code: u32 = self.read_swap()?;
- let integer_representation: u32 = self.read_swap()?;
- let character_code: u32 = self.read_swap()?;
-
- println!("{offset:08x}: machine integer info");
- if size != 4 || count != 8 {
- Err(anyhow!("Bad size ({size}) or count ({count}) field on record type 7, subtype 3"))?;
- }
- println!("\tVersion: {version_major}.{version_minor}.{version_revision}");
- println!("\tMachine code: {machine_code}");
- println!("\tFloating point representation: {float_representation} ({})",
- match float_representation {
- 1 => "IEEE 754",
- 2 => "IBM 370",
- 3 => "DEC VAX",
- _ => "unknown"
- });
- println!("\tCompression code: {compression_code}");
- println!("\tEndianness: {integer_representation} ({})",
- match integer_representation {
- 1 => "big",
- 2 => "little",
- _ => "unknown"
- });
- println!("\tCharacter code: {character_code}");
- Ok(())
- }
-
- fn read_machine_float_info(&mut self, size: u32, count: u32) -> Result<()> {
- let offset = self.r.stream_position()?;
- let sysmis: f64 = self.read_swap()?;
- let highest: f64 = self.read_swap()?;
- let lowest: f64 = self.read_swap()?;
-
- println!("{offset:08x}: machine float info");
- if size != 4 || count != 8 {
- Err(anyhow!("Bad size ({size}) or count ({count}) field on extension 4."))?;
- }
-
- println!("\tsysmis: {sysmis} ({})", HexFloat(sysmis));
- println!("\thighest: {highest} ({})", HexFloat(highest));
- println!("\tlowest: {lowest} ({})", HexFloat(lowest));
- Ok(())
- }
-
- fn read_variable_sets(&mut self, size: u32, count: u32) -> Result<()> {
- println!("{:08x}: variable sets", self.r.stream_position()?);
- let mut text = self.open_text_record(size, count)?;
- loop {
- while text.match_byte(b'\n') {
- continue;
- }
- let set = match text.tokenize(b'=') {
- Some(set) => String::from_utf8_lossy(&set).into_owned(),
- None => break,
- };
-
- // Always present even for an empty set.
- text.match_byte(b' ');
-
- match text.tokenize(b'\n') {
- None => println!("\tset \"{set}\" is empty"),
- Some(variables) => {
- println!("\tset \"{set}\" contains \"{}\"", String::from_utf8_lossy(variables).trim_end_matches('\r'));
- },
- };
-
- }
- Ok(())
- }
-
- fn read_extra_product_info(&mut self, size: u32, count: u32) -> Result<()> {
- print!("{:08x}: extra product info", self.r.stream_position()?);
- let mut text = self.open_text_record(size, count)?;
-
- }
-
- fn open_text_record(&mut self, size: u32, count: u32) -> Result<TextRecord> {
- let n_bytes = match u32::checked_mul(size, count) {
- Some(n) => n,
- None => Err(anyhow!("Extension record too large."))?
- };
- Ok(TextRecord::new(read_vec(&mut self.r, n_bytes as usize)?))
- }
-}
-
-struct TextRecord {
- buffer: Vec<u8>,
- pos: usize
-}
-
-impl TextRecord {
- fn new(buffer: Vec<u8>) -> TextRecord {
- TextRecord { buffer, pos: 0 }
- }
-
- fn tokenize<'a>(&'a mut self, delimiter: u8) -> Option<&'a [u8]> {
- let mut start = self.pos;
- while self.pos < self.buffer.len() && self.buffer[self.pos] != delimiter && self.buffer[self.pos] != 0 {
- self.pos += 1
- }
- if start == self.pos {
- None
- } else {
- Some(&self.buffer[start..self.pos])
- }
- }
-
- fn match_byte(&mut self, c: u8) -> bool {
- if self.pos < self.buffer.len() && self.buffer[self.pos] == c {
- self.pos += 1;
- true
- } else {
- false
- }
+ println!("{:?}", data);
}
+ Ok(())
}
projects / pspp / blobdiff