fix all known regressions with sed and also make it simpler

diff --git a/editors/sed.c b/editors/sed.c
index 720d29a..28ee698 100644 (file)
--- a/editors/sed.c
+++ b/editors/sed.c
@@ -82,7 +82,7 @@ typedef struct sed_cmd_s {
        unsigned int in_match:1;        /* Next line also included in match? */
        unsigned int sub_p:1;           /* (s) print option */
 
-       int last_char;                  /* Last line written by (sw) had no '\n' */
+//     int sw_last_char;                  /* Last line written by (sw) had no '\n' */
 
        /* GENERAL FIELDS */
        char cmd;               /* The command char: abcdDgGhHilnNpPqrstwxy:={} */
@@ -717,6 +717,11 @@ static void add_input_file(FILE *file)
        bbg.input_file_list[bbg.input_file_count++] = file;
 }
 
+enum {
+       MASK_NO_EOL_CHAR = 0x100,
+       //MASK_FIRST_LINE = 0x200,
+};
+
 /* Get next line of input from bbg.input_file_list, flushing append buffer and
  * noting if we ran out of files without a newline on the last line we read.
  */
@@ -743,13 +748,13 @@ static char *get_next_line(int *last_char)
                        }
                        /* will be returned if last line in the file
                         * doesn't end with either '\n' or '\0' */
-                       lc |= 0x100;
+                       lc |= MASK_NO_EOL_CHAR;
                        break;
                }
                /* Close this file and advance to next one */
                fclose(bbg.input_file_list[bbg.current_input_file++]);
                /* "this is the first line from new input file" */
-               lc |= 0x200;
+               //lc |= MASK_FIRST_LINE;
        }
        *last_char = lc;
        return temp;
@@ -757,7 +762,7 @@ static char *get_next_line(int *last_char)
 
 /* Output line of text. */
 /* Note:
- * The tricks with 0x200 and last_puts_char are there to emulate gnu sed.
+ * The tricks with MASK_FIRST_LINE and last_puts_char are there to emulate gnu sed.
  * Without them, we had this:
  * echo -n thingy >z1
  * echo -n again >z2
@@ -769,14 +774,14 @@ static char *get_next_line(int *last_char)
  * bbox:
  * 00000000  74 68 7a 6e 67 79 61 67  61 7a 6e                 |thzngyagazn|
  */
-
-static int puts_maybe_newline(char *s, FILE *file, int prev_last_char, int last_char)
+static void puts_maybe_newline(char *s, FILE *file, int last_char)
 {
-       static char last_puts_char;
+       static char last_puts_char = '\n';
 
        /* Is this a first line from new file
-        * and old file didn't end with '\n'? */
-       if ((last_char & 0x200) && last_puts_char != '\n') {
+        * and old file didn't end with '\n' or '\0'? */
+//     if ((last_char & MASK_FIRST_LINE) && last_puts_char != '\n') {
+       if (last_puts_char != '\n' && last_puts_char != '\0') {
                fputc('\n', file);
                last_puts_char = '\n';
        }
@@ -784,7 +789,7 @@ static int puts_maybe_newline(char *s, FILE *file, int prev_last_char, int last_
        /* why 'x'? - just something which is not '\n' */
        if (s[0])
                last_puts_char = 'x';
-       if (!(last_char & 0x100)) { /* had trailing '\n' or '\0'? */
+       if (!(last_char & MASK_NO_EOL_CHAR)) { /* had trailing '\n' or '\0'? */
                last_char &= 0xff;
                fputc(last_char, file);
                last_puts_char = last_char;
@@ -795,18 +800,18 @@ static int puts_maybe_newline(char *s, FILE *file, int prev_last_char, int last_
                bb_error_msg_and_die(bb_msg_write_error);
        }
 
-       return last_char;
+       /* Seems to be unused */
+       /*return last_char;*/
 }
 
-#define sed_puts(s, n) \
-       (prev_last_char = puts_maybe_newline(s, bbg.nonstdout, prev_last_char, n))
+#define sed_puts(s, n) (puts_maybe_newline(s, bbg.nonstdout, n))
 
 /* Process all the lines in all the files */
 
 static void process_files(void)
 {
        char *pattern_space, *next_line;
-       int linenum = 0, prev_last_char = 0;
+       int linenum = 0;
        int last_char, next_last_char = 0;
        sed_cmd_t *sed_cmd;
        int substituted;
@@ -873,10 +878,13 @@ restart:
 
                /* Skip blocks of commands we didn't match. */
                if (sed_cmd->cmd == '{') {
-                       if (sed_cmd->invert ? matched : !matched)
-                               while (sed_cmd && sed_cmd->cmd != '}')
+                       if (sed_cmd->invert ? matched : !matched) {
+                               while (sed_cmd->cmd != '}') {
                                        sed_cmd = sed_cmd->next;
-                       if (!sed_cmd) bb_error_msg_and_die("unterminated {");
+                                       if (!sed_cmd)
+                                               bb_error_msg_and_die("unterminated {");
+                               }
+                       }
                        continue;
                }
 
@@ -902,7 +910,8 @@ restart:
 
                                if (tmp) {
                                        *tmp = '\0';
-                                       sed_puts(pattern_space, 1);
+                                       /* TODO: explain why '\n' below */
+                                       sed_puts(pattern_space, '\n');
                                        *tmp = '\n';
                                        break;
                                }
@@ -911,7 +920,11 @@ restart:
 
                        /* Write the current pattern space to output */
                        case 'p':
-                               sed_puts(pattern_space, last_char);
+                               /* NB: we print this _before_ the last line
+                                * (of current file) is printed. Even if
+                                * that line is nonterminated, we print
+                                * '\n' here (gnu sed does the same) */
+                               sed_puts(pattern_space, (last_char & 0x200) | '\n');
                                break;
                        /* Delete up through first newline */
                        case 'D':
@@ -940,9 +953,9 @@ restart:
                                        sed_puts(pattern_space, last_char);
                                /* handle w option */
                                if (sed_cmd->file)
-                                       sed_cmd->last_char = puts_maybe_newline(
+                                       /*sed_cmd->sw_last_char =*/ puts_maybe_newline(
                                                pattern_space, sed_cmd->file,
-                                               sed_cmd->last_char, last_char);
+                                               last_char);
                                break;
 
                        /* Append line to linked list to be printed later */
@@ -952,14 +965,14 @@ restart:
 
                        /* Insert text before this line */
                        case 'i':
-                               sed_puts(sed_cmd->string, 1);
+                               sed_puts(sed_cmd->string, '\n');
                                break;
 
                        /* Cut and paste text (replace) */
                        case 'c':
                                /* Only triggers on last line of a matching range. */
                                if (!sed_cmd->in_match)
-                                       sed_puts(sed_cmd->string, 0);
+                                       sed_puts(sed_cmd->string, MASK_NO_EOL_CHAR);
                                goto discard_line;
 
                        /* Read file, append contents to output */
@@ -982,9 +995,9 @@ restart:
 
                        /* Write pattern space to file. */
                        case 'w':
-                               sed_cmd->last_char = puts_maybe_newline(
+                               /*sed_cmd->sw_last_char =*/ puts_maybe_newline(
                                        pattern_space, sed_cmd->file,
-                                       sed_cmd->last_char, last_char);
+                                       last_char);
                                break;
 
                        /* Read next line from input */
@@ -1123,13 +1136,14 @@ restart:
        /*
         * exit point from sedding...
         */
-discard_commands:
+ discard_commands:
        /* we will print the line unless we were told to be quiet ('-n')
           or if the line was suppressed (ala 'd'elete) */
-       if (!bbg.be_quiet) sed_puts(pattern_space, last_char);
+       if (!bbg.be_quiet)
+               sed_puts(pattern_space, last_char);
 
        /* Delete and such jump here. */
-discard_line:
+ discard_line:
        flush_append();
        free(pattern_space);
 

diff --git a/testsuite/sed.tests b/testsuite/sed.tests
index 2a0d4ea..a386f17 100755 (executable)
--- a/testsuite/sed.tests
+++ b/testsuite/sed.tests
@@ -146,6 +146,11 @@ testing "sed match EOF" "sed -e '"'$p'"'" "hello\nthere\nthere" "" \
        "hello\nthere"
 testing "sed match EOF two files" "sed -e '"'$p'"' input -" \
        "one\ntwo\nthree\nfour\nfour" "one\ntwo" "three\nfour"
+# sed match EOF inline: gnu sed 4.1.5 outputs this:
+#00000000  6f 6e 65 0a 6f 6f 6b 0a  6f 6f 6b 0a 74 77 6f 0a  |one.ook.ook.two.|
+#00000010  0a 74 68 72 65 65 0a 6f  6f 6b 0a 6f 6f 6b 0a 66  |.three.ook.ook.f|
+#00000020  6f 75 72                                          |our|
+# which looks buggy to me.
 echo -ne "three\nfour" > input2
 testing "sed match EOF inline" \
        "sed -e '"'$i ook'"' -i input input2 && cat input input2" \