Function lex_string_literal

src/cypher/cypher.c:92–129

Parse a string literal (with escape handling) into the token list. * *pos points at the character after the opening quote; updated past closing quote. */

/* Parse a string literal (with escape handling) into the token list.
 * *pos points at the character after the opening quote; updated past closing quote. */
static void lex_string_literal(const char *input, int len, int *pos, char quote,
                               cbm_lex_result_t *out) {
    int start = *pos;
    char buf[CBM_SZ_4K];
    int blen = 0;
    const int max_blen = CBM_SZ_4K - 1;
    while (*pos < len && input[*pos] != quote) {
        if (input[*pos] == '\\' && *pos + SKIP_ONE < len) {
            (*pos)++;
            if (blen < max_blen) {
                switch (input[*pos]) {
                case 'n':
                    buf[blen++] = '\n';
                    break;
                case 't':
                    buf[blen++] = '\t';
                    break;
                case '\\':
                    buf[blen++] = '\\';
                    break;
                default:
                    buf[blen++] = input[*pos];
                    break;
                }
            }
        } else {
            if (blen < max_blen) {
                buf[blen++] = input[*pos];
            }
        }
        (*pos)++;
    }
    buf[blen] = '\0';
    if (*pos < len) {
        (*pos)++; /* skip closing quote */
    }
    lex_push(out, TOK_STRING, buf, start - SKIP_ONE);
}

/* Keyword table (case-insensitive lookup) */
typedef struct {