/* * Example of using libxlsxwriter for writing large files in constant memory * mode. * * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org * */ #include "xlsxwriter.h" int main() { lxw_row_t row; lxw_col_t col; lxw_row_t max_row = 1000; lxw_col_t max_col = 50; /* Set the worksheet options. */ lxw_workbook_options options = {.constant_memory = LXW_TRUE, .tmpdir = NULL, .use_zip64 = LXW_FALSE}; /* Create a new workbook with options. */ lxw_workbook *workbook = workbook_new_opt("constant_memory.xlsx", &options); lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL); for (row = 0; row < max_row; row++) { for (col = 0; col < max_col; col++) { worksheet_write_number(worksheet, row, col, 123.45, NULL); } } return workbook_close(workbook); }