static int unicode_case1()

in src/couch_quickjs/quickjs/libunicode.c [549:610]

• 58 lines of code
• 20 McCabe index (conditional complexity)

static int unicode_case1(CharRange *cr, int case_mask)
{
#define MR(x) (1 << RUN_TYPE_ ## x)
    const uint32_t tab_run_mask[3] = {
        MR(U) | MR(UF) | MR(UL) | MR(LSU) | MR(U2L_399_EXT2) | MR(UF_D20) |
        MR(UF_D1_EXT) | MR(U_EXT) | MR(UF_EXT2) | MR(UF_EXT3),

        MR(L) | MR(LF) | MR(UL) | MR(LSU) | MR(U2L_399_EXT2) | MR(LF_EXT) | MR(LF_EXT2),

        MR(UF) | MR(LF) | MR(UL) | MR(LSU) | MR(U2L_399_EXT2) | MR(LF_EXT) | MR(LF_EXT2) | MR(UF_D20) | MR(UF_D1_EXT) | MR(LF_EXT) | MR(UF_EXT2) | MR(UF_EXT3),
    };
#undef MR
    uint32_t mask, v, code, type, len, i, idx;

    if (case_mask == 0)
        return 0;
    mask = 0;
    for(i = 0; i < 3; i++) {
        if ((case_mask >> i) & 1)
            mask |= tab_run_mask[i];
    }
    for(idx = 0; idx < countof(case_conv_table1); idx++) {
        v = case_conv_table1[idx];
        type = (v >> (32 - 17 - 7 - 4)) & 0xf;
        code = v >> (32 - 17);
        len = (v >> (32 - 17 - 7)) & 0x7f;
        if ((mask >> type) & 1) {
            //            printf("%d: type=%d %04x %04x\n", idx, type, code, code + len - 1);
            switch(type) {
            case RUN_TYPE_UL:
                if ((case_mask & CASE_U) && (case_mask & (CASE_L | CASE_F)))
                    goto def_case;
                code += ((case_mask & CASE_U) != 0);
                for(i = 0; i < len; i += 2) {
                    if (cr_add_interval(cr, code + i, code + i + 1))
                        return -1;
                }
                break;
            case RUN_TYPE_LSU:
                if ((case_mask & CASE_U) && (case_mask & (CASE_L | CASE_F)))
                    goto def_case;
                if (!(case_mask & CASE_U)) {
                    if (cr_add_interval(cr, code, code + 1))
                        return -1;
                }
                if (cr_add_interval(cr, code + 1, code + 2))
                    return -1;
                if (case_mask & CASE_U) {
                    if (cr_add_interval(cr, code + 2, code + 3))
                        return -1;
                }
                break;
            default:
            def_case:
                if (cr_add_interval(cr, code, code + len))
                    return -1;
                break;
            }
        }
    }
    return 0;
}