218 for (coefi = Ss; coefi <= Se; coefi++) {
219 if (last_bitpos_ptr[coefi] < 0) {
220 /* first scan of this coefficient */
221 if (Ah != 0)
222 ERREXIT1(cinfo, JERR_BAD_PROG_SCRIPT, scanno);
223 } else {
224 /* not first scan */
225 if (Ah != last_bitpos_ptr[coefi] || Al != Ah-1)
226 ERREXIT1(cinfo, JERR_BAD_PROG_SCRIPT, scanno);
227 }
228 last_bitpos_ptr[coefi] = Al;
229 }
230 }
231 #endif
232 } else {
233 /* For sequential JPEG, all progression parameters must be these: */
234 if (Ss != 0 || Se != DCTSIZE2-1 || Ah != 0 || Al != 0)
235 ERREXIT1(cinfo, JERR_BAD_PROG_SCRIPT, scanno);
236 /* Make sure components are not sent twice */
237 for (ci = 0; ci < ncomps; ci++) {
238 thisi = scanptr->component_index[ci];
239 if (component_sent[thisi])
240 ERREXIT1(cinfo, JERR_BAD_SCAN_SCRIPT, scanno);
241 component_sent[thisi] = TRUE;
242 }
243 }
244 }
245
246 /* Now verify that everything got sent. */
247 if (cinfo->progressive_mode) {
248 #ifdef C_PROGRESSIVE_SUPPORTED
249 /* For progressive mode, we only check that at least some DC data
250 * got sent for each component; the spec does not require that all bits
251 * of all coefficients be transmitted. Would it be wiser to enforce
252 * transmission of all coefficient bits??
253 */
254 for (ci = 0; ci < cinfo->num_components; ci++) {
255 if (last_bitpos[ci][0] < 0)
256 ERREXIT(cinfo, JERR_MISSING_DATA);
257 }
258 #endif
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218 for (coefi = Ss; coefi <= Se; coefi++) {
219 if (last_bitpos_ptr[coefi] < 0) {
220 /* first scan of this coefficient */
221 if (Ah != 0)
222 ERREXIT1(cinfo, JERR_BAD_PROG_SCRIPT, scanno);
223 } else {
224 /* not first scan */
225 if (Ah != last_bitpos_ptr[coefi] || Al != Ah-1)
226 ERREXIT1(cinfo, JERR_BAD_PROG_SCRIPT, scanno);
227 }
228 last_bitpos_ptr[coefi] = Al;
229 }
230 }
231 #endif
232 } else {
233 /* For sequential JPEG, all progression parameters must be these: */
234 if (Ss != 0 || Se != DCTSIZE2-1 || Ah != 0 || Al != 0)
235 ERREXIT1(cinfo, JERR_BAD_PROG_SCRIPT, scanno);
236 /* Make sure components are not sent twice */
237 for (ci = 0; ci < ncomps; ci++) {
238 #ifdef __GNUC__
239 #pragma GCC diagnostic ignored "-Warray-bounds"
240 #endif
241 thisi = scanptr->component_index[ci];
242
243 if (component_sent[thisi])
244 ERREXIT1(cinfo, JERR_BAD_SCAN_SCRIPT, scanno);
245 component_sent[thisi] = TRUE;
246 }
247 }
248 }
249
250 /* Now verify that everything got sent. */
251 if (cinfo->progressive_mode) {
252 #ifdef C_PROGRESSIVE_SUPPORTED
253 /* For progressive mode, we only check that at least some DC data
254 * got sent for each component; the spec does not require that all bits
255 * of all coefficients be transmitted. Would it be wiser to enforce
256 * transmission of all coefficient bits??
257 */
258 for (ci = 0; ci < cinfo->num_components; ci++) {
259 if (last_bitpos[ci][0] < 0)
260 ERREXIT(cinfo, JERR_MISSING_DATA);
261 }
262 #endif
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