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C API: Keep the structure flat

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See https://github.com/NixOS/nix/pull/10329
This commit is contained in:
José Luis Lafuente 2024-03-28 19:00:04 +01:00
parent d96b52bd8b
commit c57de60522
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26 changed files with 50 additions and 32 deletions
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148
src/libutil/c/nix_api_util.cc
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@ -1,148 +0,0 @@
#include "nix_api_util.h"
#include "config.hh"
#include "error.hh"
#include "nix_api_util_internal.h"
#include "util.hh"
#include <cxxabi.h>
#include <typeinfo>
nix_c_context * nix_c_context_create()
{
return new nix_c_context();
}
void nix_c_context_free(nix_c_context * context)
{
delete context;
}
nix_err nix_context_error(nix_c_context * context)
{
if (context == nullptr) {
throw;
}
try {
throw;
} catch (nix::Error & e) {
/* Storing this exception is annoying, take what we need here */
context->last_err = e.what();
context->info = e.info();
int status;
const char * demangled = abi::__cxa_demangle(typeid(e).name(), 0, 0, &status);
if (demangled) {
context->name = demangled;
// todo: free(demangled);
} else {
context->name = typeid(e).name();
}
context->last_err_code = NIX_ERR_NIX_ERROR;
return context->last_err_code;
} catch (const std::exception & e) {
context->last_err = e.what();
context->last_err_code = NIX_ERR_UNKNOWN;
return context->last_err_code;
}
// unreachable
}
nix_err nix_set_err_msg(nix_c_context * context, nix_err err, const char * msg)
{
if (context == nullptr) {
// todo last_err_code
throw nix::Error("Nix C api error: %s", msg);
}
context->last_err_code = err;
context->last_err = msg;
return err;
}
const char * nix_version_get()
{
return PACKAGE_VERSION;
}
// Implementations
nix_err nix_setting_get(nix_c_context * context, const char * key, void * callback, void * user_data)
{
if (context)
context->last_err_code = NIX_OK;
try {
std::map<std::string, nix::AbstractConfig::SettingInfo> settings;
nix::globalConfig.getSettings(settings);
if (settings.contains(key)) {
return call_nix_observe_string(settings[key].value, callback, user_data);
} else {
return nix_set_err_msg(context, NIX_ERR_KEY, "Setting not found");
}
}
NIXC_CATCH_ERRS
}
nix_err nix_setting_set(nix_c_context * context, const char * key, const char * value)
{
if (context)
context->last_err_code = NIX_OK;
if (nix::globalConfig.set(key, value))
return NIX_OK;
else {
return nix_set_err_msg(context, NIX_ERR_KEY, "Setting not found");
}
}
nix_err nix_libutil_init(nix_c_context * context)
{
if (context)
context->last_err_code = NIX_OK;
try {
nix::initLibUtil();
return NIX_OK;
}
NIXC_CATCH_ERRS
}
const char * nix_err_msg(nix_c_context * context, const nix_c_context * read_context, unsigned int * n)
{
if (context)
context->last_err_code = NIX_OK;
if (read_context->last_err) {
if (n)
*n = read_context->last_err->size();
return read_context->last_err->c_str();
}
nix_set_err_msg(context, NIX_ERR_UNKNOWN, "No error message");
return nullptr;
}
nix_err nix_err_name(nix_c_context * context, const nix_c_context * read_context, void * callback, void * user_data)
{
if (context)
context->last_err_code = NIX_OK;
if (read_context->last_err_code != NIX_ERR_NIX_ERROR) {
return nix_set_err_msg(context, NIX_ERR_UNKNOWN, "Last error was not a nix error");
}
return call_nix_observe_string(read_context->name, callback, user_data);
}
nix_err nix_err_info_msg(nix_c_context * context, const nix_c_context * read_context, void * callback, void * user_data)
{
if (context)
context->last_err_code = NIX_OK;
if (read_context->last_err_code != NIX_ERR_NIX_ERROR) {
return nix_set_err_msg(context, NIX_ERR_UNKNOWN, "Last error was not a nix error");
}
return call_nix_observe_string(read_context->info->msg.str(), callback, user_data);
}
nix_err nix_err_code(const nix_c_context * read_context)
{
return read_context->last_err_code;
}
// internal
nix_err call_nix_observe_string(const std::string str, void * callback, void * user_data)
{
((nix_observe_string) callback)(str.c_str(), str.size(), user_data);
return NIX_OK;
}