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122 lines
2.5 KiB
C++
122 lines
2.5 KiB
C++
#include "c4/yml/common.hpp"
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#ifndef RYML_NO_DEFAULT_CALLBACKS
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# include <stdlib.h>
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# include <stdio.h>
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#endif // RYML_NO_DEFAULT_CALLBACKS
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namespace c4 {
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namespace yml {
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C4_SUPPRESS_WARNING_GCC_CLANG_WITH_PUSH("-Wold-style-cast")
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namespace {
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Callbacks s_default_callbacks;
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} // anon namespace
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#ifndef RYML_NO_DEFAULT_CALLBACKS
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void report_error_impl(const char* msg, size_t length, Location loc, FILE *f)
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{
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if(!f)
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f = stderr;
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if(loc)
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{
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if(!loc.name.empty())
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{
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fwrite(loc.name.str, 1, loc.name.len, f);
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fputc(':', f);
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}
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fprintf(f, "%zu:", loc.line);
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if(loc.col)
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fprintf(f, "%zu:", loc.col);
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if(loc.offset)
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fprintf(f, " (%zuB):", loc.offset);
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}
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fprintf(f, "%.*s\n", (int)length, msg);
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fflush(f);
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}
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void error_impl(const char* msg, size_t length, Location loc, void * /*user_data*/)
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{
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report_error_impl(msg, length, loc, nullptr);
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::abort();
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}
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void* allocate_impl(size_t length, void * /*hint*/, void * /*user_data*/)
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{
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void *mem = ::malloc(length);
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if(mem == nullptr)
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{
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const char msg[] = "could not allocate memory";
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error_impl(msg, sizeof(msg)-1, {}, nullptr);
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}
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return mem;
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}
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void free_impl(void *mem, size_t /*length*/, void * /*user_data*/)
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{
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::free(mem);
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}
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#endif // RYML_NO_DEFAULT_CALLBACKS
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Callbacks::Callbacks()
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:
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m_user_data(nullptr),
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#ifndef RYML_NO_DEFAULT_CALLBACKS
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m_allocate(allocate_impl),
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m_free(free_impl),
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m_error(error_impl)
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#else
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m_allocate(nullptr),
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m_free(nullptr),
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m_error(nullptr)
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#endif
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{
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}
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Callbacks::Callbacks(void *user_data, pfn_allocate alloc_, pfn_free free_, pfn_error error_)
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:
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m_user_data(user_data),
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#ifndef RYML_NO_DEFAULT_CALLBACKS
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m_allocate(alloc_ ? alloc_ : allocate_impl),
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m_free(free_ ? free_ : free_impl),
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m_error(error_ ? error_ : error_impl)
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#else
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m_allocate(alloc_),
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m_free(free_),
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m_error(error_)
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#endif
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{
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C4_CHECK(m_allocate);
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C4_CHECK(m_free);
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C4_CHECK(m_error);
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}
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void set_callbacks(Callbacks const& c)
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{
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s_default_callbacks = c;
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}
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Callbacks const& get_callbacks()
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{
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return s_default_callbacks;
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}
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void reset_callbacks()
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{
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set_callbacks(Callbacks());
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}
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void error(const char *msg, size_t msg_len, Location loc)
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{
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s_default_callbacks.m_error(msg, msg_len, loc, s_default_callbacks.m_user_data);
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}
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C4_SUPPRESS_WARNING_GCC_CLANG_POP
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} // namespace yml
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} // namespace c4
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