From 46a0be5304fb44e07e5066540f8e4061a3ecc438 Mon Sep 17 00:00:00 2001
From: Leonid Lisovskiy <lly.dev@gmail.com>
Date: Mon, 21 Sep 2009 04:08:08 +0200
Subject: awk: implement mktime
function old new delta
exec_builtin - 1466 +1466
do_mktime - 116 +116
tokenlist 441 448 +7
tokeninfo 396 400 +4
evaluate 5395 3755 -1640
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 2/1 up/down: 1593/-1640) Total: -47 bytes
Signed-off-by: Leonid Lisovskiy <lly.dev@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
---
editors/awk.c | 40 ++++++++++++++++++++++++++++++++++++----
1 file changed, 36 insertions(+), 4 deletions(-)
(limited to 'editors')
diff --git a/editors/awk.c b/editors/awk.c
index cb98a67b6..aa2fd484c 100644
--- a/editors/awk.c
+++ b/editors/awk.c
@@ -250,7 +250,7 @@ enum {
/* builtins */
enum {
- B_a2, B_ix, B_ma, B_sp, B_ss, B_ti, B_lo, B_up,
+ B_a2, B_ix, B_ma, B_sp, B_ss, B_ti, B_mt, B_lo, B_up,
B_ge, B_gs, B_su,
B_an, B_co, B_ls, B_or, B_rs, B_xo,
};
@@ -299,7 +299,7 @@ static const char tokenlist[] ALIGN1 =
"\4rand" "\3sin" "\4sqrt" "\5srand"
"\6gensub" "\4gsub" "\5index" "\6length"
"\5match" "\5split" "\7sprintf" "\3sub"
- "\6substr" "\7systime" "\10strftime"
+ "\6substr" "\7systime" "\10strftime" "\6mktime"
"\7tolower" "\7toupper" NTC
"\7getline" NTC
"\4func" "\10function" NTC
@@ -353,7 +353,7 @@ static const uint32_t tokeninfo[] = {
OC_FBLTIN|F_rn, OC_FBLTIN|Nx|F_si, OC_FBLTIN|Nx|F_sq, OC_FBLTIN|Nx|F_sr,
OC_B|B_ge|P(0xd6), OC_B|B_gs|P(0xb6), OC_B|B_ix|P(0x9b), OC_FBLTIN|Sx|F_le,
OC_B|B_ma|P(0x89), OC_B|B_sp|P(0x8b), OC_SPRINTF, OC_B|B_su|P(0xb6),
- OC_B|B_ss|P(0x8f), OC_FBLTIN|F_ti, OC_B|B_ti|P(0x0b),
+ OC_B|B_ss|P(0x8f), OC_FBLTIN|F_ti, OC_B|B_ti|P(0x0b), OC_B|B_mt|P(0x0b),
OC_B|B_lo|P(0x49), OC_B|B_up|P(0x49),
OC_GETLINE|SV|P(0),
0, 0,
@@ -2001,7 +2001,35 @@ static int awk_sub(node *rn, const char *repl, int nm, var *src, var *dest, int
return i;
}
-static var *exec_builtin(node *op, var *res)
+static NOINLINE int do_mktime(const char *ds)
+{
+ struct tm then;
+ int count;
+
+ /*memset(&then, 0, sizeof(then)); - not needed */
+ then.tm_isdst = -1; /* default is unknown */
+
+ /* manpage of mktime says these fields are ints,
+ * so we can sscanf stuff directly into them */
+ count = sscanf(ds, "%u %u %u %u %u %u %d",
+ &then.tm_year, &then.tm_mon, &then.tm_mday,
+ &then.tm_hour, &then.tm_min, &then.tm_sec,
+ &then.tm_isdst);
+
+ if (count < 6
+ || (unsigned)then.tm_mon < 1
+ || (unsigned)then.tm_year < 1900
+ ) {
+ return -1;
+ }
+
+ then.tm_mon -= 1;
+ then.tm_year -= - 1900;
+
+ return mktime(&then);
+}
+
+static NOINLINE var *exec_builtin(node *op, var *res)
{
#define tspl (G.exec_builtin__tspl)
@@ -2150,6 +2178,10 @@ static var *exec_builtin(node *op, var *res)
setvar_s(res, g_buf);
break;
+ case B_mt:
+ setvar_i(res, do_mktime(as[0]));
+ break;
+
case B_ma:
re = as_regex(an[1], &sreg);
n = regexec(re, as[0], 1, pmatch, 0);
--
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