display.h
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// sherpa-onnx/csrc/display.h
//
// Copyright (c) 2022-2023 Xiaomi Corporation
#ifndef SHERPA_ONNX_CSRC_DISPLAY_H_
#define SHERPA_ONNX_CSRC_DISPLAY_H_
#include <stdio.h>
#include <string>
namespace sherpa_onnx {
class Display {
public:
void Print(int32_t segment_id, const std::string &s) {
#ifdef _MSC_VER
fprintf(stderr, "%d:%s\n", segment_id, s.c_str());
return;
#endif
if (last_segment_ == segment_id) {
Clear();
} else {
if (last_segment_ != -1) {
fprintf(stderr, "\n\r");
}
last_segment_ = segment_id;
num_previous_lines_ = 0;
}
fprintf(stderr, "\r%d:", segment_id);
int32_t i = 0;
for (size_t n = 0; n < s.size();) {
if (s[n] > 0 && s[n] < 0x7f) {
fprintf(stderr, "%c", s[n]);
++n;
} else {
// Each Chinese character occupies 3 bytes for UTF-8 encoding.
std::string tmp(s.begin() + n, s.begin() + n + 3);
fprintf(stderr, "%s", tmp.data());
n += 3;
}
++i;
if (i >= max_word_per_line_ && n + 1 < s.size() &&
(s[n] == ' ' || s[n] < 0)) {
fprintf(stderr, "\n\r ");
++num_previous_lines_;
i = 0;
}
}
}
private:
// Clear the output for the current segment
void Clear() {
ClearCurrentLine();
while (num_previous_lines_ > 0) {
GoUpOneLine();
ClearCurrentLine();
--num_previous_lines_;
}
}
// Clear the current line
void ClearCurrentLine() const { fprintf(stderr, "\33[2K\r"); }
// Move the cursor to the previous line
void GoUpOneLine() const { fprintf(stderr, "\033[1A\r"); }
private:
int32_t max_word_per_line_ = 60;
int32_t num_previous_lines_ = 0;
int32_t last_segment_ = -1;
};
} // namespace sherpa_onnx
#endif // SHERPA_ONNX_CSRC_DISPLAY_H_