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dc: make "dc -1.23 ..." work

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function                                             old     new   delta
stack_machine                                         97     103      +6
dc_main                                              121     110     -11
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/2 up/down: 9/-58)             Total: -49 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2009-12-30 18:37:08 +01:00
parent 6879a7ae43
commit bd1de181ad
1 changed files with 8 additions and 9 deletions
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17
miscutils/dc.c
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@ -191,24 +191,21 @@ static void stack_machine(const char *argument)
double d; double d;
const struct op *o = operators; const struct op *o = operators;
if (argument == 0)
return;
d = strtod(argument, &endPointer); d = strtod(argument, &endPointer);
if (endPointer != argument) { if (endPointer != argument && *endPointer == '\0') {
push(d); push(d);
return; return;
} }
while (o->name[0]) { while (o->function) {
if (strcmp(o->name, argument) == 0) { if (strcmp(o->name, argument) == 0) {
o->function(); o->function();
return; return;
} }
o++; o++;
} }
bb_error_msg_and_die("%s: syntax error", argument); bb_error_msg_and_die("syntax error at '%s'", argument);
} }
/* return pointer to next token in buffer and set *buffer to one char /* return pointer to next token in buffer and set *buffer to one char
@ -239,15 +236,17 @@ int dc_main(int argc UNUSED_PARAM, char **argv)
cursor = line; cursor = line;
while (1) { while (1) {
token = get_token(&cursor); token = get_token(&cursor);
if (!token) break; if (!token)
break;
*cursor++ = '\0'; *cursor++ = '\0';
stack_machine(token); stack_machine(token);
} }
free(line); free(line);
} }
} else { } else {
if (argv[0][0] == '-') // why? it breaks "dc -2 2 * p"
bb_show_usage(); //if (argv[0][0] == '-')
// bb_show_usage();
do { do {
stack_machine(*argv); stack_machine(*argv);
} while (*++argv); } while (*++argv);