(detect_coding_iso2022): Handle ESC N and ESC O

correctly.  They are for SS2 and SS3 respectively.
(ccl_coding_driver): Fix previous change.

1 files changed, 11 insertions, 27 deletions

diff --git a/src/coding.c b/src/coding.c
index dba64143bdb..89e82678a2d 100644
--- a/src/coding.c
+++ b/src/coding.c
@@ -733,33 +733,14 @@ detect_coding_iso2022 (src, src_end)
                 /* Invalid designation sequence.  Just ignore.  */
                 break;
             }
-          else if (c == 'N' || c == 'n')
+          else if (c == 'N' || c == 'O')
             {
-              if (shift_out == 0
-                  && (reg[1] >= 0
-                      || SHIFT_OUT_OK (CODING_CATEGORY_IDX_ISO_7_ELSE)
-                      || SHIFT_OUT_OK (CODING_CATEGORY_IDX_ISO_8_ELSE)))
-                {
-                  /* Locking shift out.  */
-                  mask &= ~CODING_CATEGORY_MASK_ISO_7BIT;
-                  mask_found |= CODING_CATEGORY_MASK_ISO_SHIFT;
-                  shift_out = 1;
-                }
-              break;
-            }
-          else if (c == 'O' || c == 'o')
-            {
-              if (shift_out == 1)
-                {
-                  /* Locking shift in.  */
-                  mask &= ~CODING_CATEGORY_MASK_ISO_7BIT;
-                  mask_found |= CODING_CATEGORY_MASK_ISO_SHIFT;
-                  shift_out = 0;
-                }
+              /* ESC <Fe> for SS2 or SS3.  */
+              mask &= CODING_CATEGORY_MASK_ISO_7_ELSE;
               break;
             }
           else if (c == '0' || c == '1' || c == '2')
-            /* Start/end composition.  Just ignore.  */
+            /* ESC <Fp> for start/end composition.  Just ignore.  */
             break;
           else
             /* Invalid escape sequence.  Just ignore.  */
@@ -775,9 +756,13 @@ detect_coding_iso2022 (src, src_end)
             mask_found |= CODING_CATEGORY_MASK_ISO_7_TIGHT;
           else
             mask &= ~CODING_CATEGORY_MASK_ISO_7_TIGHT;
-          if (! CHARSET_OK (CODING_CATEGORY_IDX_ISO_7_ELSE, charset))
+          if (CHARSET_OK (CODING_CATEGORY_IDX_ISO_7_ELSE, charset))
+            mask_found |= CODING_CATEGORY_MASK_ISO_7_ELSE;
+          else
             mask &= ~CODING_CATEGORY_MASK_ISO_7_ELSE;
-          if (! CHARSET_OK (CODING_CATEGORY_IDX_ISO_8_ELSE, charset))
+          if (CHARSET_OK (CODING_CATEGORY_IDX_ISO_8_ELSE, charset))
+            mask_found |= CODING_CATEGORY_MASK_ISO_8_ELSE;
+          else
             mask &= ~CODING_CATEGORY_MASK_ISO_8_ELSE;
           break;
 
@@ -3623,8 +3608,7 @@ ccl_coding_driver (coding, source, destination, src_bytes, dst_bytes, encodep)
     = encodep ? &coding->spec.ccl.encoder : &coding->spec.ccl.decoder;
   int result;
 
-  if (encodep)
-    ccl->last_block = coding->mode & CODING_MODE_LAST_BLOCK;
+  ccl->last_block = coding->mode & CODING_MODE_LAST_BLOCK;
 
   coding->produced = ccl_driver (ccl, source, destination,
                                  src_bytes, dst_bytes, &(coding->consumed));