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update all unit tests, fix bug with unterminated escape, updated multiline parsing, refactored some code, removed unused code

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ado
2021-02-21 02:49:23 +01:00
parent 2dbc21780f
commit 1af0e75788
9 changed files with 422 additions and 281 deletions
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144
include/ss/splitter.hpp
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@@ -9,9 +9,6 @@
#include <string>
#include <vector>
// TODO remove
#include <iostream>
namespace ss {
template <typename... Ts>
@@ -21,6 +18,7 @@ private:
using trim_left = typename setup<Ts...>::trim_left;
using trim_right = typename setup<Ts...>::trim_right;
using escape = typename setup<Ts...>::escape;
using multiline = typename setup<Ts...>::multiline;
constexpr static auto string_error = setup<Ts...>::string_error;
constexpr static auto is_const_line = !quote::enabled && !escape::enabled;
@@ -50,7 +48,9 @@ public:
const split_data& split(line_ptr_type new_line,
const std::string& delimiter = default_delimiter) {
split_data_.clear();
return resplit(new_line, -1, delimiter);
line_ = new_line;
begin_ = line_;
return split_impl_select_delim(delimiter);
}
private:
@@ -58,6 +58,11 @@ private:
// resplit
////////////////
// number of characters the end of line is shifted backwards
size_t size_shifted() const {
return escaped_;
}
void adjust_ranges(const char* old_line) {
for (auto& [begin, end] : split_data_) {
begin = begin - old_line + line_;
@@ -68,33 +73,35 @@ private:
const split_data& resplit(
line_ptr_type new_line, ssize_t new_size,
const std::string& delimiter = default_delimiter) {
line_ = new_line;
// resplitting, continue from last slice
if constexpr (quote::enabled) {
if (!split_data_.empty() && unterminated_quote()) {
const auto& last = std::prev(split_data_.end());
const auto [old_line, old_begin] = *last;
size_t begin = old_begin - old_line - 1;
split_data_.pop_back();
adjust_ranges(old_line);
// safety measure
if (new_size != -1 && static_cast<size_t>(new_size) < begin) {
set_error_invalid_resplit();
return split_data_;
}
std::cout << "======================" << std::endl;
std::cout << "resplitting" << std::endl;
resplitting_ = true;
begin_ = line_ + begin;
size_t end = end_ - old_line - escaped_;
end_ = line_ + end;
curr_ = end_;
}
if (!quote::enabled || !multiline::enabled || split_data_.empty() ||
!unterminated_quote()) {
set_error_invalid_resplit();
return split_data_;
}
const auto [old_line, old_begin] = *std::prev(split_data_.end());
size_t begin = old_begin - old_line - 1;
// safety measure
if (new_size != -1 && static_cast<size_t>(new_size) < begin) {
set_error_invalid_resplit();
return split_data_;
}
// if unterminated quote, the last element is junk
split_data_.pop_back();
line_ = new_line;
adjust_ranges(old_line);
begin_ = line_ + begin;
end_ = line_ - old_line + end_ - escaped_;
curr_ = end_;
resplitting_ = true;
return split_impl_select_delim(delimiter);
}
@@ -129,6 +136,15 @@ private:
}
}
void set_error_unterminated_escape() {
if constexpr (string_error) {
error_.clear();
error_.append("unterminated escape at the end of the line");
} else {
error_ = true;
}
}
void set_error_unterminated_quote() {
unterminated_quote_ = true;
if constexpr (string_error) {
@@ -215,25 +231,14 @@ private:
// shifting
////////////////
void shift_and_set_current() {
if constexpr (!is_const_line) {
if (escaped_ > 0) {
std::copy_n(curr_ + escaped_, end_ - curr_ - escaped_, curr_);
curr_ = end_ - escaped_;
return;
}
}
curr_ = end_;
}
void shift_and_push() {
shift_and_set_current();
split_data_.emplace_back(begin_, curr_);
}
void shift_if_escaped(line_ptr_type& curr) {
if constexpr (escape::enabled) {
if (escape::match(*curr)) {
if (curr[1] == '\0') {
set_error_unterminated_escape();
done_ = true;
return;
}
shift_and_jump_escape();
}
}
@@ -252,6 +257,22 @@ private:
begin_ = end_ + n;
}
void shift_and_push() {
shift_and_set_current();
split_data_.emplace_back(begin_, curr_);
}
void shift_and_set_current() {
if constexpr (!is_const_line) {
if (escaped_ > 0) {
std::copy_n(curr_ + escaped_, end_ - curr_ - escaped_, curr_);
curr_ = end_ - escaped_;
return;
}
}
curr_ = end_;
}
////////////////
// split impl
////////////////
@@ -273,10 +294,6 @@ private:
template <typename Delim>
const split_data& split_impl(const Delim& delim) {
if (split_data_.empty()) {
begin_ = line_;
}
trim_left_if_enabled(begin_);
for (done_ = false; !done_; read(delim))
@@ -293,11 +310,13 @@ private:
void read(const Delim& delim) {
escaped_ = 0;
if constexpr (quote::enabled) {
if (resplitting_) {
resplitting_ = false;
++begin_;
read_quoted(delim);
return;
if constexpr (multiline::enabled) {
if (resplitting_) {
resplitting_ = false;
++begin_;
read_quoted(delim);
return;
}
}
if (quote::match(*begin_)) {
curr_ = end_ = ++begin_;
@@ -336,19 +355,27 @@ private:
template <typename Delim>
void read_quoted(const Delim& delim) {
if constexpr (quote::enabled) {
std::cout << "start loop: " << std::endl;
while (true) {
std::cout << "- " << *end_ << std::endl;
if (!quote::match(*end_)) {
if constexpr (escape::enabled) {
if (escape::match(*end_)) {
if (end_[1] == '\0') {
// eol, unterminated escape
// eg: ... "hel\\0
set_error_unterminated_escape();
done_ = true;
break;
}
// not eol
shift_and_jump_escape();
++end_;
continue;
}
}
// not escaped
// unterminated quote error
// eol, unterminated quote error
// eg: ..."hell\0 -> quote not terminated
if (*end_ == '\0') {
shift_and_set_current();
@@ -357,9 +384,13 @@ private:
done_ = true;
break;
}
// not eol
++end_;
continue;
}
// quote found
// ...
auto [width, valid] = match_delimiter(end_ + 1, delim);
@@ -368,6 +399,7 @@ private:
shift_push_and_start_next(width + 1);
break;
}
// not delimiter
// double quote
// eg: ...,"hel""lo",... -> hel"lo
@@ -376,8 +408,8 @@ private:
++end_;
continue;
}
// not double quote
// not a delimiter
if (width == 0) {
// eol
// eg: ...,"hello" \0 -> hello