diff options
Diffstat (limited to 'Src/hist.c')
| -rw-r--r-- | Src/hist.c | 150 |
1 files changed, 113 insertions, 37 deletions
diff --git a/Src/hist.c b/Src/hist.c index 87bfde882..f1bae14f4 100644 --- a/Src/hist.c +++ b/Src/hist.c @@ -876,7 +876,18 @@ hbegin(int dohist) stophist = (!interact || unset(SHINSTDIN)) ? 2 : 0; else stophist = 0; - if (stophist == 2 || (inbufflags & INP_ALIAS)) { + /* + * pws: We used to test for "|| (inbufflags & INP_ALIAS)" + * in this test, but at this point we don't have input + * set up up so this can trigger unnecessarily. + * I don't see how the test at this point could ever be + * useful, since we only get here when we're initialising + * the history mechanism, before we've done any input. + * + * (I also don't see any point where this function is called with + * dohist=0.) + */ + if (stophist == 2) { chline = hptr = NULL; hlinesz = 0; chwords = NULL; @@ -3090,7 +3101,10 @@ histsplitwords(char *lineptr, short **wordsp, int *nwordsp, int *nwordposp, wordnode; incnode(wordnode)) { char *word = getdata(wordnode); + char *lptr, *wptr = word; + int loop_next = 0, skipping; + /* Skip stuff at the start of the word */ for (;;) { /* * Not really an oddity: "\\\n" is @@ -3098,57 +3112,119 @@ histsplitwords(char *lineptr, short **wordsp, int *nwordsp, int *nwordposp, */ if (inblank(*lineptr)) lineptr++; - else if (lineptr[0] == '\\' && lineptr[1] == '\n') + else if (lineptr[0] == '\\' && lineptr[1] == '\n') { + /* + * Optimisation: we handle this in the loop below, + * too. + */ lineptr += 2; - else + } else break; } - if (!strpfx(word, lineptr)) { - int bad = 0; - /* - * Oddity 1: newlines turn into semicolons. - */ - if (!strcmp(word, ";")) - continue; - while (*lineptr) { - if (!*word) { - bad = 1; + lptr = lineptr; + /* + * Skip chunks of word with possible intervening + * backslash-newline. + * + * To get round C's annoying lack of ability to + * reference the outer loop, we'll break from this + * one with + * loop_next = 0: carry on as normal + * loop_next = 1: break from outer loop + * loop_next = 2: continue round outer loop. + */ + do { + skipping = 0; + if (strpfx(wptr, lptr)) { + /* + * Normal case: word from lexer matches start of + * string from line. Just advance over it. + */ + int len; + if (!strcmp(wptr, ";") && strpfx(";;", lptr)) { + /* + * Don't get confused between a semicolon that's + * probably really a newline and a double + * semicolon that's terminating a case. + */ + loop_next = 2; break; } + len = strlen(wptr); + lptr += len; + wptr += len; + } else { /* - * Oddity 2: !'s turn into |'s. + * Didn't get to the end of the word. + * See what's amiss. */ - if (*lineptr == *word || - (*lineptr == '!' && *word == '|')) { - lineptr++; - word++; - } else { - bad = 1; + int bad = 0; + /* + * Oddity 1: newlines turn into semicolons. + */ + if (!strcmp(wptr, ";")) + { + loop_next = 2; break; } - } - if (bad) { + while (*lptr) { + if (!*wptr) { + /* + * End of the word before the end of the + * line: not good. + */ + bad = 1; + loop_next = 1; + break; + } + /* + * Oddity 2: !'s turn into |'s. + */ + if (*lptr == *wptr || + (*lptr == '!' && *wptr == '|')) { + lptr++; + wptr++; + } else if (lptr[0] == '\\' && + lptr[1] == '\n') { + /* + * \\\n can occur in the middle of a word; + * wptr is already pointing at this, we + * just need to skip over the break + * in lptr and look at the next chunk. + */ + lptr += 2; + skipping = 1; + break; + } else { + bad = 1; + loop_next = 1; + break; + } + } + if (bad) { #ifdef DEBUG - dputs(ERRMSG("bad wordsplit reading history: " - "%s\nat: %s\nword: %s"), - start, lineptr, word); + dputs(ERRMSG("bad wordsplit reading history: " + "%s\nat: %s\nword: %s"), + start, lineptr, word); #endif - lineptr = start; - nwordpos = 0; - uselex = 0; - break; + lineptr = start; + nwordpos = 0; + uselex = 0; + loop_next = 1; + } } - } else if (!strcmp(word, ";") && strpfx(";;", lineptr)) { - /* - * Don't get confused between a semicolon that's - * probably really a newline and a double - * semicolon that's terminating a case. - */ + } while (skipping); + if (loop_next) { + if (loop_next == 1) + break; continue; } + /* Record position of current word... */ words[nwordpos++] = lineptr - start; - lineptr += strlen(word); - words[nwordpos++] = lineptr - start; + words[nwordpos++] = lptr - start; + + /* ready for start of next word. */ + lineptr = lptr; } } if (!uselex) { |