luxferre/bantam-cpp
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Replace nlohmann/json with native C++20 JSON engine, cut build RAM/time, fix 32-bit build, enable -O2 -march=native

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Luxferre
2026-10-14 08:36:39 +03:00
parent 3e70adeb8b
commit 39d7640a5a
11 changed files with 910 additions and 25919 deletions
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tools.cpp
+25 -16
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@@ -1,10 +1,10 @@
/* tools.cpp — bash/read/write tools and oversized result offloading. */
#include "bantam.hpp"
#include <algorithm>
#include <array>
#include <cstring>
#include <fstream>
#include <cerrno>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <dirent.h>
#include <fcntl.h>
#include <poll.h>
@@ -123,7 +123,11 @@ std::string read_file_or_dir(std::string_view path, int offset, int limit, int *
}
closedir(dir);
}
std::sort(raw_names.begin(), raw_names.end());
for (size_t i = 1; i < raw_names.size(); i++) {
for (size_t j = i; j > 0 && raw_names[j - 1] > raw_names[j]; j--) {
std::swap(raw_names[j - 1], raw_names[j]);
}
}
std::string b;
for (auto &nm : raw_names) {
std::string full = p + "/" + nm;
@@ -138,24 +142,29 @@ std::string read_file_or_dir(std::string_view path, int offset, int limit, int *
return b;
}
/* regular file */
std::ifstream f(p, std::ios::binary);
FILE *f = std::fopen(p.c_str(), "rb");
if (!f) { *style = 31; return sfmt("[tool error: read %s: %s]", p.c_str(), strerror(errno)); }
if (offset < 1) offset = 1;
if (limit <= 0) limit = 2000;
std::string b;
std::string line;
char *line_buf = nullptr;
size_t cap = 0;
ssize_t n;
int line_num = 0, read_count = 0;
while (std::getline(f, line)) {
while ((n = getline(&line_buf, &cap, f)) >= 0) {
line_num++;
if (line_num < offset) continue;
read_count++;
while (!line.empty() && (line.back() == '\n' || line.back() == '\r')) line.pop_back();
std::string_view lview = utf8_truncate(line, 2000);
size_t len = (size_t)n;
while (len > 0 && (line_buf[len - 1] == '\n' || line_buf[len - 1] == '\r')) len--;
std::string_view lview = utf8_truncate(std::string_view(line_buf, len), 2000);
str_appendf(b, "%d: ", line_num);
b.append(lview);
b += '\n';
if (read_count >= limit) break;
}
free(line_buf);
std::fclose(f);
if (!b.empty()) b.pop_back(); /* trailing newline */
*style = 2;
return b;
@@ -180,9 +189,10 @@ std::string write_file(std::string_view path, int offset, int del_bytes,
*err = 1;
return sfmt("[tool error: write %s: Is a directory]", p.c_str());
}
std::ifstream f(p, std::ios::binary);
if (!f) { *err = 1; return sfmt("[tool error: write %s: %s]", p.c_str(), strerror(errno)); }
data.assign((std::istreambuf_iterator<char>(f)), std::istreambuf_iterator<char>());
if (!read_file_str(p, data)) {
*err = 1;
return sfmt("[tool error: write %s: %s]", p.c_str(), strerror(errno));
}
} else {
auto slash = p.find_last_of('/');
if (slash != std::string::npos) mkdir_p(std::string_view(p).substr(0, slash));
@@ -201,10 +211,9 @@ std::string write_file(std::string_view path, int offset, int del_bytes,
nd.append(data, 0, prefix_len);
nd.append(content);
if (suffix_len) nd.append(data, end_del, suffix_len);
{
std::ofstream out(p, std::ios::binary | std::ios::trunc);
if (!out) { *err = 1; return sfmt("[tool error: write %s: %s]", p.c_str(), strerror(errno)); }
out.write(nd.data(), (std::streamsize)nd.size());
if (!write_file_str(p, nd)) {
*err = 1;
return sfmt("[tool error: write %s: %s]", p.c_str(), strerror(errno));
}
return sfmt("Successfully wrote %zu bytes to %s", clen, p.c_str());
}