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authorDenys Vlasenko <vda.linux@googlemail.com>2010-03-11 11:41:55 (GMT)
committer Denys Vlasenko <vda.linux@googlemail.com>2010-03-11 11:41:55 (GMT)
commit6ebdf7aa7bc2eac2b43601d5b9ec70af22e38af3 (patch)
tree7e4fda7c650f71ba2ac3d225cb208b35b211f544
parentda62b09ab1def06ed8844c4df7b7eacf05474284 (diff)
downloadbusybox-6ebdf7aa7bc2eac2b43601d5b9ec70af22e38af3.tar.gz
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awk: code shrink; style fixes
function old new delta next_token 932 862 -70 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
-rw-r--r--editors/awk.c112
1 files changed, 71 insertions, 41 deletions
diff --git a/editors/awk.c b/editors/awk.c
index 397d70f..829d8a4 100644
--- a/editors/awk.c
+++ b/editors/awk.c
@@ -674,10 +674,11 @@ static void skip_spaces(char **s)
*s = p;
}
+/* returns old *s, advances *s past word and terminating NUL */
static char *nextword(char **s)
{
char *p = *s;
- while (*(*s)++)
+ while (*(*s)++ != '\0')
continue;
return p;
}
@@ -686,12 +687,12 @@ static char nextchar(char **s)
{
char c, *pps;
- c = *((*s)++);
+ c = *(*s)++;
pps = *s;
if (c == '\\')
c = bb_process_escape_sequence((const char**)s);
if (c == '\\' && *s == pps)
- c = *((*s)++);
+ c = *(*s)++;
return c;
}
@@ -963,7 +964,7 @@ static uint32_t next_token(uint32_t expected)
/* Initialized to TC_OPTERM: */
#define ltclass (G.next_token__ltclass)
- char *p, *pp, *s;
+ char *p, *s;
const char *tl;
uint32_t tc;
const uint32_t *ti;
@@ -996,9 +997,11 @@ static uint32_t next_token(uint32_t expected)
/* it's a string */
t_string = s = ++p;
while (*p != '\"') {
+ char *pp = p;
if (*p == '\0' || *p == '\n')
syntax_error(EMSG_UNEXP_EOS);
- *(s++) = nextchar(&p);
+ *s++ = nextchar(&pp);
+ p = pp;
}
p++;
*s = '\0';
@@ -1012,12 +1015,14 @@ static uint32_t next_token(uint32_t expected)
syntax_error(EMSG_UNEXP_EOS);
*s = *p++;
if (*s++ == '\\') {
- pp = p;
- *(s-1) = bb_process_escape_sequence((const char **)&p);
- if (*pp == '\\')
+ char *pp = p;
+ s[-1] = bb_process_escape_sequence((const char **)&pp);
+ if (*p == '\\')
*s++ = '\\';
- if (p == pp)
+ if (pp == p)
*s++ = *p++;
+ else
+ p = pp;
}
}
p++;
@@ -1026,8 +1031,10 @@ static uint32_t next_token(uint32_t expected)
} else if (*p == '.' || isdigit(*p)) {
/* it's a number */
- t_double = my_strtod(&p);
- if (*p == '.')
+ char *pp = p;
+ t_double = my_strtod(&pp);
+ p = pp;
+ if (*pp == '.')
syntax_error(EMSG_UNEXP_TOKEN);
tc = TC_NUMBER;
@@ -1037,7 +1044,7 @@ static uint32_t next_token(uint32_t expected)
tc = 0x00000001;
ti = tokeninfo;
while (*tl) {
- l = *(tl++);
+ l = *tl++;
if (l == NTCC) {
tc <<= 1;
continue;
@@ -1066,10 +1073,10 @@ static uint32_t next_token(uint32_t expected)
syntax_error(EMSG_UNEXP_TOKEN);
t_string = --p;
- while (isalnum_(*(++p))) {
- *(p-1) = *p;
+ while (isalnum_(*++p)) {
+ p[-1] = *p;
}
- *(p-1) = '\0';
+ p[-1] = '\0';
tc = TC_VARIABLE;
/* also consume whitespace between functionname and bracket */
if (!(expected & TC_VARIABLE) || (expected & TC_ARRAY))
@@ -1332,7 +1339,8 @@ static void chain_group(void)
if (c & TC_GRPSTART) {
while (next_token(TC_GRPSEQ | TC_GRPTERM) != TC_GRPTERM) {
- if (t_tclass & TC_NEWLINE) continue;
+ if (t_tclass & TC_NEWLINE)
+ continue;
rollback_token();
chain_group();
}
@@ -1628,7 +1636,8 @@ static int awk_split(const char *s, node *spl, char **slist)
c[0] = toupper(c[0]);
c[1] = tolower(c[1]);
}
- if (*s1) n++;
+ if (*s1)
+ n++;
while ((s1 = strpbrk(s1, c))) {
*s1++ = '\0';
n++;
@@ -1638,7 +1647,8 @@ static int awk_split(const char *s, node *spl, char **slist)
/* space split */
while (*s) {
s = skip_whitespace(s);
- if (!*s) break;
+ if (!*s)
+ break;
n++;
while (*s && !isspace(*s))
*s1++ = *s++;
@@ -1836,7 +1846,8 @@ static int awk_getline(rstream *rsm, var *v)
}
} else if (c != '\0') {
s = strchr(b+pp, c);
- if (!s) s = memchr(b+pp, '\0', p - pp);
+ if (!s)
+ s = memchr(b+pp, '\0', p - pp);
if (s) {
so = eo = s-b;
eo++;
@@ -1931,7 +1942,7 @@ static char *awk_printf(node *n)
i = 0;
while (*f) {
s = f;
- while (*f && (*f != '%' || *(++f) == '%'))
+ while (*f && (*f != '%' || *++f == '%'))
f++;
while (*f && !isalpha(*f)) {
if (*f == '*')
@@ -1942,7 +1953,8 @@ static char *awk_printf(node *n)
incr = (f - s) + MAXVARFMT;
b = qrealloc(b, incr + i, &bsize);
c = *f;
- if (c != '\0') f++;
+ if (c != '\0')
+ f++;
c1 = *f;
*f = '\0';
arg = evaluate(nextarg(&n), v);
@@ -1961,7 +1973,8 @@ static char *awk_printf(node *n)
*f = c1;
/* if there was an error while sprintf, return value is negative */
- if (i < j) i = j;
+ if (i < j)
+ i = j;
}
b = xrealloc(b, i + 1);
@@ -1987,8 +2000,10 @@ static int awk_sub(node *rn, const char *repl, int nm, var *src, var *dest, int
regex_t sreg, *re;
re = as_regex(rn, &sreg);
- if (!src) src = intvar[F0];
- if (!dest) dest = intvar[F0];
+ if (!src)
+ src = intvar[F0];
+ if (!dest)
+ dest = intvar[F0];
i = di = 0;
sp = getvar_s(src);
@@ -2100,8 +2115,10 @@ static NOINLINE var *exec_builtin(node *op, var *res)
av[2] = av[3] = NULL;
for (i = 0; i < 4 && op; i++) {
an[i] = nextarg(&op);
- if (isr & 0x09000000) av[i] = evaluate(an[i], &tv[i]);
- if (isr & 0x08000000) as[i] = getvar_s(av[i]);
+ if (isr & 0x09000000)
+ av[i] = evaluate(an[i], &tv[i]);
+ if (isr & 0x08000000)
+ as[i] = getvar_s(av[i]);
isr >>= 1;
}
@@ -2140,10 +2157,13 @@ static NOINLINE var *exec_builtin(node *op, var *res)
case B_ss:
l = strlen(as[0]);
i = getvar_i(av[1]) - 1;
- if (i > l) i = l;
- if (i < 0) i = 0;
+ if (i > l)
+ i = l;
+ if (i < 0)
+ i = 0;
n = (nargs > 2) ? getvar_i(av[2]) : l-i;
- if (n < 0) n = 0;
+ if (n < 0)
+ n = 0;
s = xstrndup(as[0]+i, n);
setvar_p(res, s);
break;
@@ -2193,7 +2213,8 @@ static NOINLINE var *exec_builtin(node *op, var *res)
if (ll > 0 && l >= 0) {
if (!icase) {
s = strstr(as[0], as[1]);
- if (s) n = (s - as[0]) + 1;
+ if (s)
+ n = (s - as[0]) + 1;
} else {
/* this piece of code is terribly slow and
* really should be rewritten
@@ -2239,7 +2260,8 @@ static NOINLINE var *exec_builtin(node *op, var *res)
setvar_i(newvar("RSTART"), pmatch[0].rm_so);
setvar_i(newvar("RLENGTH"), pmatch[0].rm_eo - pmatch[0].rm_so);
setvar_i(res, pmatch[0].rm_so);
- if (re == &sreg) regfree(re);
+ if (re == &sreg)
+ regfree(re);
break;
case B_ge:
@@ -2305,11 +2327,16 @@ static var *evaluate(node *op, var *res)
/* execute inevitable things */
op1 = op->l.n;
- if (opinfo & OF_RES1) X.v = L.v = evaluate(op1, v1);
- if (opinfo & OF_RES2) R.v = evaluate(op->r.n, v1+1);
- if (opinfo & OF_STR1) L.s = getvar_s(L.v);
- if (opinfo & OF_STR2) R.s = getvar_s(R.v);
- if (opinfo & OF_NUM1) L.d = getvar_i(L.v);
+ if (opinfo & OF_RES1)
+ X.v = L.v = evaluate(op1, v1);
+ if (opinfo & OF_RES2)
+ R.v = evaluate(op->r.n, v1+1);
+ if (opinfo & OF_STR1)
+ L.s = getvar_s(L.v);
+ if (opinfo & OF_STR2)
+ R.s = getvar_s(R.v);
+ if (opinfo & OF_NUM1)
+ L.d = getvar_i(L.v);
switch (XC(opinfo & OPCLSMASK)) {
@@ -2384,7 +2411,8 @@ static var *evaluate(node *op, var *res)
fputs(getvar_s(L.v), X.F);
}
- if (op1) fputs(getvar_s(intvar[OFS]), X.F);
+ if (op1)
+ fputs(getvar_s(intvar[OFS]), X.F);
}
}
fputs(getvar_s(intvar[ORS]), X.F);
@@ -2463,7 +2491,8 @@ static var *evaluate(node *op, var *res)
re_cont:
X.re = as_regex(op1, &sreg);
R.i = regexec(X.re, L.s, 0, NULL, 0);
- if (X.re == &sreg) regfree(X.re);
+ if (X.re == &sreg)
+ regfree(X.re);
setvar_i(res, (R.i == 0) ^ (opn == '!'));
break;
@@ -2523,7 +2552,8 @@ static var *evaluate(node *op, var *res)
}
}
} else {
- if (!iF) iF = next_input_file();
+ if (!iF)
+ iF = next_input_file();
X.rsm = iF;
}
@@ -2822,10 +2852,10 @@ static int is_assignment(const char *expr)
return FALSE;
}
- *(s++) = '\0';
+ *s++ = '\0';
s0 = s1 = s;
while (*s)
- *(s1++) = nextchar(&s);
+ *s1++ = nextchar(&s);
*s1 = '\0';
setvar_u(newvar(exprc), s0);