host_str_conv.cpp

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#include "host_str_conv.h"
 
#include "plugin_manager/host_api.h"
#include "cdc_views/RenderHelpers.h"
#include "cdc_core/Cp437.h"
 
#include <cstring>
 
namespace cdc::plugin_manager {
 
std::string toDisplay(const char* utf8)
{
    if (!utf8 || !*utf8) return std::string();
    size_t cap = std::strlen(utf8) + 1;
    std::string out;
    out.resize(cap);
    cdc::ui::render::decodeWebText(utf8, &out[0], cap, cdc::ui::render::DisplayTarget::Cp437);
    out.resize(std::strlen(out.c_str()));
    return out;
}
 
int copyUtf8(const char* cp437, char* out, size_t out_size)
{
    if (!out || out_size == 0) return HOST_ERR_INVALID_ARG;
    std::string u = cp437 ? cdc::core::cp437::toUtf8(cp437) : std::string();
    size_t n = u.size();
    if (n >= out_size) {
        n = out_size - 1;
        // Back off so the buffer never ends inside a multi-byte UTF-8 sequence.
        while (n > 0 && (static_cast<unsigned char>(u[n]) & 0xC0) == 0x80) --n;
    }
    std::memcpy(out, u.data(), n);
    out[n] = '\0';
    return static_cast<int>(n);
}
 
}  // namespace cdc::plugin_manager