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Minor cleanup in number parsing

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Signed-off-by: David Oberhollenzer <david.oberhollenzer@tele2.at>
This commit is contained in:
David Oberhollenzer 2018-11-24 14:02:17 +01:00
parent 1d6b5e58ab
commit a4791171cd
1 changed files with 16 additions and 20 deletions
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36
rdcron.c
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@ -99,42 +99,39 @@ static const struct {
static char *readnum(char *line, int *out, int minval, int maxval,
const enum_map_t *mnemonic, rdline_t *rd)
{
int i, temp, value = 0;
int i, value = 0;
const enum_map_t *ev;
if (!isdigit(*line)) {
if (!mnemonic)
goto fail_mn;
for (i = 0; isalnum(line[i]); ++i)
if (isalpha(line[0]) && mnemonic != NULL) {
for (i = 0; isalpha(line[i]); ++i)
;
if (i == 0)
goto fail_mn;
temp = line[i];
line[i] = '\0';
for (ev = mnemonic; ev->name != NULL; ++ev) {
if (strcmp(line, ev->name) == 0)
if (strncmp(line, ev->name, i) == 0 &&
ev->name[i] == '\0')
break;
}
if (ev->name == NULL) {
rdline_complain(rd, "unexpected '%s'", line);
rdline_complain(rd, "unexpected '%.*s'", i, line);
return NULL;
}
line[i] = temp;
*out = ev->value;
return line + i;
}
if (!isdigit(line[0]))
goto fail_mn;
while (isdigit(*line)) {
i = ((*(line++)) - '0');
if (value > (maxval - i) / 10)
if (value > INT_MAX / 10)
goto fail_of;
value = value * 10 + i;
value = value * 10 + *(line++) - '0';
}
if (value > maxval)
goto fail_of;
if (value < minval)
goto fail_uf;
@ -155,7 +152,7 @@ static char *readfield(char *line, uint64_t *out, int minval, int maxval,
const enum_map_t *mnemonic, rdline_t *rd)
{
int value, endvalue, step;
uint64_t v = 0;
*out = 0;
next:
if (*line == '*') {
++line;
@ -188,7 +185,7 @@ next:
}
while (value <= endvalue) {
v |= 1UL << (unsigned long)(value - minval);
*out |= 1UL << (unsigned long)(value - minval);
value += step;
}
@ -202,7 +199,6 @@ next:
while (isspace(*line))
++line;
*out = v;
return line;
fail:
rdline_complain(rd, "invalid time range expression");