diff options
Diffstat (limited to 'editors')
| -rw-r--r-- | editors/awk.c | 33 |
1 files changed, 25 insertions, 8 deletions
diff --git a/editors/awk.c b/editors/awk.c index d56d6330d..2c15f9e4e 100644 --- a/editors/awk.c +++ b/editors/awk.c @@ -1763,6 +1763,29 @@ static void fsrealloc(int size) nfields = size; } +static int regexec1_nonempty(const regex_t *preg, const char *s, regmatch_t pmatch[]) +{ + int r = regexec(preg, s, 1, pmatch, 0); + if (r == 0 && pmatch[0].rm_eo == 0) { + /* For example, happens when FS can match + * an empty string (awk -F ' *'). Logically, + * this should split into one-char fields. + * However, gawk 5.0.1 searches for first + * _non-empty_ separator string match: + */ + size_t ofs = 0; + do { + ofs++; + if (!s[ofs]) + return REG_NOMATCH; + regexec(preg, s + ofs, 1, pmatch, 0); + } while (pmatch[0].rm_eo == 0); + pmatch[0].rm_so += ofs; + pmatch[0].rm_eo += ofs; + } + return r; +} + static int awk_split(const char *s, node *spl, char **slist) { int n; @@ -1788,17 +1811,11 @@ static int awk_split(const char *s, node *spl, char **slist) regmatch_t pmatch[2]; // TODO: why [2]? [1] is enough... l = strcspn(s, c+2); /* len till next NUL or \n */ - if (regexec(icase ? spl->r.ire : spl->l.re, s, 1, pmatch, 0) == 0 + if (regexec1_nonempty(icase ? spl->r.ire : spl->l.re, s, pmatch) == 0 && pmatch[0].rm_so <= l ) { + /* if (pmatch[0].rm_eo == 0) ... - impossible */ l = pmatch[0].rm_so; - if (pmatch[0].rm_eo == 0) { - /* For example, happens when FS can match - * an empthy string (awk -F ' *') - */ - l++; - pmatch[0].rm_eo++; - } n++; /* we saw yet another delimiter */ } else { pmatch[0].rm_eo = l; |