total_keycode_name_size.cpp

#include <cstring>
#include <cstdlib>
#include <cstdio>

const int VK_MAX = 0xFF;
const int VK_ASCII_LETTER_MIN = 0x41;
const int VK_ASCII_LETTER_MAX = 0x5A;
const int VK_ASCII_NUMBER_MIN = 0x30;
const int VK_ASCII_NUMBER_MAX = 0x39;
extern const char *keycode_names[];

int main(int argc, char **argv) {
    FILE *out = stdout;

    if(argc == 2 || argc > 3) {
        fprintf(stderr, "Usage: total_keycode_name_size [<output_file> <define_name>]\n");
        return EXIT_FAILURE;
    } else if(argc == 3) {
        out = fopen(argv[1], "w");
        if(out == nullptr) {
            perror("fopen");
            return EXIT_FAILURE;
        }
        fprintf(out, "// Auto-generated by total_keycode_name_size.cpp\n// Words: ");
    }

    size_t total = 0;
    for(int x = 0;x < VK_MAX;x++) {
        if((x >= VK_ASCII_LETTER_MIN && x <= VK_ASCII_LETTER_MAX) || (x >= VK_ASCII_NUMBER_MIN && x <= VK_ASCII_NUMBER_MAX)) {
            fprintf(out, "%c ", (char)x);
            // 1 char + 1 space
            total += 2;
        } else if (keycode_names[x] != nullptr) {
            // strlen + 1 space
            fprintf(out, "%s ", keycode_names[x]);
            total += strlen(keycode_names[x]) + 1;
        } else {
            fprintf(out, "0x%02X ", x);
            // 0x + 2 hex digits + 1 space
            total += 5;
        }
    }

    if(argc == 3) {
        fprintf(out, "\n#define %s %zu\n", argv[2], total);
        fclose(out);
    } else {
        fprintf(out, "\n%zu\n", total);
    }
}