| 190 | } |
| 191 | |
| 192 | double getHexConstant() { |
| 193 | try { |
| 194 | token = st.nextToken(); |
| 195 | } catch (Exception e) { |
| 196 | return 0.0; |
| 197 | } |
| 198 | if (st.ttype != StreamTokenizer.TT_WORD) { |
| 199 | st.pushBack(); |
| 200 | return 0.0; |
| 201 | } |
| 202 | if (!st.sval.startsWith("x")) { |
| 203 | st.pushBack(); |
| 204 | return 0.0; |
| 205 | } |
| 206 | String s = st.sval.substring(1, st.sval.length()); |
| 207 | double n = 0.0; |
| 208 | try { |
| 209 | n = Long.parseLong(s, 16); |
| 210 | } catch (NumberFormatException e) { |
| 211 | st.pushBack(); |
| 212 | n = 0.0; |
| 213 | } |
| 214 | return n; |
| 215 | } |
| 216 | |
| 217 | boolean tryScientificNotation() { |
| 218 | String sval = "" + tokenValue; |