647 lines
17 KiB
C
647 lines
17 KiB
C
/*
|
||
* evaluate the dc language, from a FILE* or a string
|
||
*
|
||
* Copyright (C) 1994, 1997 Free Software Foundation, Inc.
|
||
*
|
||
* This program is free software; you can redistribute it and/or modify
|
||
* it under the terms of the GNU General Public License as published by
|
||
* the Free Software Foundation; either version 2, or (at your option)
|
||
* any later version.
|
||
*
|
||
* This program is distributed in the hope that it will be useful,
|
||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
* GNU General Public License for more details.
|
||
*
|
||
* You should have received a copy of the GNU General Public License
|
||
* along with this program; if not, you can either send email to this
|
||
* program's author (see below) or write to: The Free Software Foundation,
|
||
* Inc.; 675 Mass Ave. Cambridge, MA 02139, USA.
|
||
*/
|
||
|
||
/* This is the only module which knows about the dc input language */
|
||
|
||
#include "config.h"
|
||
|
||
#include <stdio.h>
|
||
#ifdef HAVE_STRING_H
|
||
# include <string.h> /* memchr */
|
||
#else
|
||
# ifdef HAVE_MEMORY_H
|
||
# include <memory.h> /* memchr, maybe */
|
||
# else
|
||
# ifdef HAVE_STRINGS_H
|
||
# include <strings.h> /* memchr, maybe */
|
||
# endif
|
||
#endif
|
||
#endif
|
||
#include "dc.h"
|
||
#include "dc-proto.h"
|
||
|
||
typedef enum {
|
||
DC_OKAY = DC_SUCCESS, /* no further intervention needed for this command */
|
||
DC_EATONE, /* caller needs to eat the lookahead char */
|
||
DC_QUIT, /* quit out of unwind_depth levels of evaluation */
|
||
|
||
/* with the following return values, the caller does not have to
|
||
* fret about stdin_lookahead's value
|
||
*/
|
||
DC_INT, /* caller needs to parse a dc_num from input stream */
|
||
DC_STR, /* caller needs to parse a dc_str from input stream */
|
||
DC_SYSTEM, /* caller needs to run a system() on next input line */
|
||
DC_COMMENT, /* caller needs to skip to the next input line */
|
||
|
||
DC_EOF_ERROR /* unexpected end of input; abort current eval */
|
||
} dc_status;
|
||
|
||
static int dc_ibase=10; /* input base, 2 <= dc_ibase <= DC_IBASE_MAX */
|
||
static int dc_obase=10; /* output base, 2 <= dc_obase */
|
||
static int dc_scale=0; /* scale (see user documentaton) */
|
||
|
||
/* for Quitting evaluations */
|
||
static int unwind_depth=0;
|
||
|
||
/* if true, active Quit will not exit program */
|
||
static dc_boolean unwind_noexit=DC_FALSE;
|
||
|
||
/*
|
||
* Used to synchronize lookahead on stdin for '?' command.
|
||
* If set to EOF then lookahead is used up.
|
||
*/
|
||
static int stdin_lookahead=EOF;
|
||
|
||
|
||
/* input_fil and input_str are passed as arguments to dc_getnum */
|
||
|
||
/* used by the input_* functions: */
|
||
static FILE *input_fil_fp;
|
||
static const char *input_str_string;
|
||
|
||
/* Since we have a need for two characters of pushback, and
|
||
* ungetc() only guarantees one, we place the second pushback here
|
||
*/
|
||
static int input_pushback;
|
||
|
||
/* passed as an argument to dc_getnum */
|
||
static int
|
||
input_fil DC_DECLVOID()
|
||
{
|
||
if (input_pushback != EOF){
|
||
int c = input_pushback;
|
||
input_pushback = EOF;
|
||
return c;
|
||
}
|
||
return getc(input_fil_fp);
|
||
}
|
||
|
||
/* passed as an argument to dc_getnum */
|
||
static int
|
||
input_str DC_DECLVOID()
|
||
{
|
||
if (!*input_str_string)
|
||
return EOF;
|
||
return *input_str_string++;
|
||
}
|
||
|
||
|
||
|
||
/* takes a string and evals it; frees the string when done */
|
||
/* Wrapper around dc_evalstr to avoid duplicating the free call
|
||
* at all possible return points.
|
||
*/
|
||
static int
|
||
dc_eval_and_free_str DC_DECLARG((string))
|
||
dc_data string DC_DECLEND
|
||
{
|
||
dc_status status;
|
||
|
||
status = dc_evalstr(string);
|
||
if (string.dc_type == DC_STRING)
|
||
dc_free_str(&string.v.string);
|
||
return status;
|
||
}
|
||
|
||
|
||
/* dc_func does the grunt work of figuring out what each input
|
||
* character means; used by both dc_evalstr and dc_evalfile
|
||
*
|
||
* c -> the "current" input character under consideration
|
||
* peekc -> the lookahead input character
|
||
*/
|
||
static dc_status
|
||
dc_func DC_DECLARG((c, peekc))
|
||
int c DC_DECLSEP
|
||
int peekc DC_DECLEND
|
||
{
|
||
/* we occasionally need these for temporary data */
|
||
/* Despite the GNU coding standards, it is much easier
|
||
* to have these declared once here, since this function
|
||
* is just one big switch statement.
|
||
*/
|
||
dc_data datum;
|
||
int tmpint;
|
||
|
||
switch (c){
|
||
case '_': case '.':
|
||
case '0': case '1': case '2': case '3':
|
||
case '4': case '5': case '6': case '7':
|
||
case '8': case '9': case 'A': case 'B':
|
||
case 'C': case 'D': case 'E': case 'F':
|
||
return DC_INT;
|
||
case ' ':
|
||
case '\t':
|
||
case '\n':
|
||
/* standard command separators */
|
||
break;
|
||
|
||
case '+': /* add top two stack elements */
|
||
dc_binop(dc_add, dc_scale);
|
||
break;
|
||
case '-': /* subtract top two stack elements */
|
||
dc_binop(dc_sub, dc_scale);
|
||
break;
|
||
case '*': /* multiply top two stack elements */
|
||
dc_binop(dc_mul, dc_scale);
|
||
break;
|
||
case '/': /* divide top two stack elements */
|
||
dc_binop(dc_div, dc_scale);
|
||
break;
|
||
case '%':
|
||
/* take the remainder from division of the top two stack elements */
|
||
dc_binop(dc_rem, dc_scale);
|
||
break;
|
||
case '~':
|
||
/* Do division on the top two stack elements. Return the
|
||
* quotient as next-to-top of stack and the remainder as
|
||
* top-of-stack.
|
||
*/
|
||
dc_binop2(dc_divrem, dc_scale);
|
||
break;
|
||
case '|':
|
||
/* Consider the top three elements of the stack as (base, exp, mod),
|
||
* where mod is top-of-stack, exp is next-to-top, and base is
|
||
* second-from-top. Mod must be non-zero and exp must be a
|
||
* non-negative integer. Push the result of raising base to the exp
|
||
* power, reduced modulo mod. If we had base in register b, exp in
|
||
* register e, and mod in register m then this is conceptually
|
||
* equivalent to "lble^lm%", but it is implemented in a more efficient
|
||
* manner, and can handle arbritrarily large values for exp.
|
||
*/
|
||
dc_triop(dc_modexp, dc_scale);
|
||
break;
|
||
case '^': /* exponientiation of the top two stack elements */
|
||
dc_binop(dc_exp, dc_scale);
|
||
break;
|
||
case '<':
|
||
/* eval register named by peekc if
|
||
* less-than holds for top two stack elements
|
||
*/
|
||
if (peekc == EOF)
|
||
return DC_EOF_ERROR;
|
||
if (dc_cmpop() < 0)
|
||
if (dc_register_get(peekc, &datum) == DC_SUCCESS)
|
||
if (dc_eval_and_free_str(datum) == DC_QUIT)
|
||
return DC_QUIT;
|
||
return DC_EATONE;
|
||
case '=':
|
||
/* eval register named by peekc if
|
||
* equal-to holds for top two stack elements
|
||
*/
|
||
if (peekc == EOF)
|
||
return DC_EOF_ERROR;
|
||
if (dc_cmpop() == 0)
|
||
if (dc_register_get(peekc, &datum) == DC_SUCCESS)
|
||
if (dc_eval_and_free_str(datum) == DC_QUIT)
|
||
return DC_QUIT;
|
||
return DC_EATONE;
|
||
case '>':
|
||
/* eval register named by peekc if
|
||
* greater-than holds for top two stack elements
|
||
*/
|
||
if (peekc == EOF)
|
||
return DC_EOF_ERROR;
|
||
if (dc_cmpop() > 0)
|
||
if (dc_register_get(peekc, &datum) == DC_SUCCESS)
|
||
if (dc_eval_and_free_str(datum) == DC_QUIT)
|
||
return DC_QUIT;
|
||
return DC_EATONE;
|
||
case '?': /* read a line from standard-input and eval it */
|
||
if (stdin_lookahead != EOF){
|
||
ungetc(stdin_lookahead, stdin);
|
||
stdin_lookahead = EOF;
|
||
}
|
||
if (dc_eval_and_free_str(dc_readstring(stdin, '\n', '\n')) == DC_QUIT)
|
||
return DC_QUIT;
|
||
return DC_OKAY;
|
||
case '[': /* read to balancing ']' into a dc_str */
|
||
return DC_STR;
|
||
case '!': /* read to newline and call system() on resulting string */
|
||
return DC_SYSTEM;
|
||
case '#': /* comment; skip remainder of current line */
|
||
return DC_COMMENT;
|
||
|
||
case 'a': /* Convert top of stack to an ascii character. */
|
||
if (dc_pop(&datum) == DC_SUCCESS){
|
||
char tmps;
|
||
if (datum.dc_type == DC_NUMBER){
|
||
tmps = (char) dc_num2int(datum.v.number, DC_TRUE);
|
||
dc_free_num(&datum.v.number);
|
||
}else if (datum.dc_type == DC_STRING){
|
||
tmps = *dc_str2charp(datum.v.string);
|
||
dc_free_str(&datum.v.string);
|
||
}else{
|
||
dc_garbage("at top of stack", -1);
|
||
}
|
||
dc_push(dc_makestring(&tmps, 1));
|
||
}
|
||
break;
|
||
case 'c': /* clear whole stack */
|
||
dc_clear_stack();
|
||
break;
|
||
case 'd': /* duplicate the datum on the top of stack */
|
||
if (dc_top_of_stack(&datum) == DC_SUCCESS)
|
||
dc_push(dc_dup(datum));
|
||
break;
|
||
case 'f': /* print list of all stack items */
|
||
dc_printall(dc_obase);
|
||
break;
|
||
case 'i': /* set input base to value on top of stack */
|
||
if (dc_pop(&datum) == DC_SUCCESS){
|
||
tmpint = 0;
|
||
if (datum.dc_type == DC_NUMBER)
|
||
tmpint = dc_num2int(datum.v.number, DC_TRUE);
|
||
if ( ! (2 <= tmpint && tmpint <= DC_IBASE_MAX) )
|
||
fprintf(stderr,
|
||
"%s: input base must be a number \
|
||
between 2 and %d (inclusive)\n",
|
||
progname, DC_IBASE_MAX);
|
||
else
|
||
dc_ibase = tmpint;
|
||
}
|
||
break;
|
||
case 'k': /* set scale to value on top of stack */
|
||
if (dc_pop(&datum) == DC_SUCCESS){
|
||
tmpint = -1;
|
||
if (datum.dc_type == DC_NUMBER)
|
||
tmpint = dc_num2int(datum.v.number, DC_TRUE);
|
||
if ( ! (tmpint >= 0) )
|
||
fprintf(stderr,
|
||
"%s: scale must be a nonnegative number\n",
|
||
progname);
|
||
else
|
||
dc_scale = tmpint;
|
||
}
|
||
break;
|
||
case 'l': /* "load" -- push value on top of register stack named
|
||
* by peekc onto top of evaluation stack; does not
|
||
* modify the register stack
|
||
*/
|
||
if (peekc == EOF)
|
||
return DC_EOF_ERROR;
|
||
if (dc_register_get(peekc, &datum) == DC_SUCCESS)
|
||
dc_push(datum);
|
||
return DC_EATONE;
|
||
case 'o': /* set output base to value on top of stack */
|
||
if (dc_pop(&datum) == DC_SUCCESS){
|
||
tmpint = 0;
|
||
if (datum.dc_type == DC_NUMBER)
|
||
tmpint = dc_num2int(datum.v.number, DC_TRUE);
|
||
if ( ! (tmpint > 1) )
|
||
fprintf(stderr,
|
||
"%s: output base must be a number greater than 1\n",
|
||
progname);
|
||
else
|
||
dc_obase = tmpint;
|
||
}
|
||
break;
|
||
case 'p': /* print the datum on the top of stack */
|
||
if (dc_top_of_stack(&datum) == DC_SUCCESS)
|
||
dc_print(datum, dc_obase);
|
||
break;
|
||
case 'q': /* quit two levels of evaluation, posibly exiting program */
|
||
unwind_depth = 2;
|
||
unwind_noexit = DC_FALSE;
|
||
return DC_QUIT;
|
||
case 'r': /* rotate (swap) the top two elements on the stack
|
||
*/
|
||
if (dc_pop(&datum) == DC_SUCCESS) {
|
||
dc_data datum2;
|
||
int two_status;
|
||
two_status = dc_pop(&datum2);
|
||
dc_push(datum);
|
||
if (two_status == DC_SUCCESS)
|
||
dc_push(datum2);
|
||
}
|
||
break;
|
||
case 's': /* "store" -- replace top of register stack named
|
||
* by peekc with the value popped from the top
|
||
* of the evaluation stack
|
||
*/
|
||
if (peekc == EOF)
|
||
return DC_EOF_ERROR;
|
||
if (dc_pop(&datum) == DC_SUCCESS)
|
||
dc_register_set(peekc, datum);
|
||
return DC_EATONE;
|
||
case 'v': /* replace top of stack with its square root */
|
||
if (dc_pop(&datum) == DC_SUCCESS){
|
||
dc_num tmpnum;
|
||
if (datum.dc_type != DC_NUMBER){
|
||
fprintf(stderr,
|
||
"%s: square root of nonnumeric attempted\n",
|
||
progname);
|
||
}else if (dc_sqrt(datum.v.number, dc_scale, &tmpnum) == DC_SUCCESS){
|
||
dc_free_num(&datum.v.number);
|
||
datum.v.number = tmpnum;
|
||
dc_push(datum);
|
||
}
|
||
}
|
||
break;
|
||
case 'x': /* eval the datum popped from top of stack */
|
||
if (dc_pop(&datum) == DC_SUCCESS){
|
||
if (datum.dc_type == DC_STRING){
|
||
if (dc_eval_and_free_str(datum) == DC_QUIT)
|
||
return DC_QUIT;
|
||
}else if (datum.dc_type == DC_NUMBER){
|
||
dc_push(datum);
|
||
}else{
|
||
dc_garbage("at top of stack", -1);
|
||
}
|
||
}
|
||
break;
|
||
case 'z': /* push the current stack depth onto the top of stack */
|
||
dc_push(dc_int2data(dc_tell_stackdepth()));
|
||
break;
|
||
|
||
case 'I': /* push the current input base onto the stack */
|
||
dc_push(dc_int2data(dc_ibase));
|
||
break;
|
||
case 'K': /* push the current scale onto the stack */
|
||
dc_push(dc_int2data(dc_scale));
|
||
break;
|
||
case 'L': /* pop a value off of register stack named by peekc
|
||
* and push it onto the evaluation stack
|
||
*/
|
||
if (peekc == EOF)
|
||
return DC_EOF_ERROR;
|
||
if (dc_register_pop(peekc, &datum) == DC_SUCCESS)
|
||
dc_push(datum);
|
||
return DC_EATONE;
|
||
case 'O': /* push the current output base onto the stack */
|
||
dc_push(dc_int2data(dc_obase));
|
||
break;
|
||
case 'P': /* print the value popped off of top-of-stack;
|
||
* do not add a trailing newline
|
||
*/
|
||
if (dc_pop(&datum) == DC_SUCCESS){
|
||
if (datum.dc_type == DC_STRING)
|
||
dc_out_str(datum.v.string, DC_FALSE, DC_TRUE);
|
||
else if (datum.dc_type == DC_NUMBER)
|
||
dc_out_num(datum.v.number, dc_obase, DC_FALSE, DC_TRUE);
|
||
else
|
||
dc_garbage("at top of stack", -1);
|
||
}
|
||
break;
|
||
case 'Q': /* quit out of top-of-stack nested evals;
|
||
* pops value from stack;
|
||
* does not exit program (stops short if necessary)
|
||
*/
|
||
if (dc_pop(&datum) == DC_SUCCESS){
|
||
unwind_depth = 0;
|
||
unwind_noexit = DC_TRUE;
|
||
if (datum.dc_type == DC_NUMBER)
|
||
unwind_depth = dc_num2int(datum.v.number, DC_TRUE);
|
||
if (unwind_depth > 0)
|
||
return DC_QUIT;
|
||
fprintf(stderr,
|
||
"%s: Q command requires a number >= 1\n",
|
||
progname);
|
||
}
|
||
break;
|
||
#if 0
|
||
case 'R': /* pop a value off of the evaluation stack,;
|
||
* rotate the top
|
||
remaining stack elements that many
|
||
* places forward (negative numbers mean rotate
|
||
* backward).
|
||
*/
|
||
if (dc_pop(&datum) == DC_SUCCESS){
|
||
tmpint = 0;
|
||
if (datum.dc_type == DC_NUMBER)
|
||
tmpint = dc_num2int(datum.v.number, DC_TRUE);
|
||
dc_stack_rotate(tmpint);
|
||
}
|
||
break;
|
||
#endif
|
||
case 'S': /* pop a value off of the evaluation stack
|
||
* and push it onto the register stack named by peekc
|
||
*/
|
||
if (peekc == EOF)
|
||
return DC_EOF_ERROR;
|
||
if (dc_pop(&datum) == DC_SUCCESS)
|
||
dc_register_push(peekc, datum);
|
||
return DC_EATONE;
|
||
case 'X': /* replace the number on top-of-stack with its scale factor */
|
||
if (dc_pop(&datum) == DC_SUCCESS){
|
||
tmpint = 0;
|
||
if (datum.dc_type == DC_NUMBER)
|
||
tmpint = dc_tell_scale(datum.v.number, DC_TRUE);
|
||
dc_push(dc_int2data(tmpint));
|
||
}
|
||
break;
|
||
case 'Z': /* replace the datum on the top-of-stack with its length */
|
||
if (dc_pop(&datum) == DC_SUCCESS)
|
||
dc_push(dc_int2data(dc_tell_length(datum, DC_TRUE)));
|
||
break;
|
||
|
||
case ':': /* store into array */
|
||
if (peekc == EOF)
|
||
return DC_EOF_ERROR;
|
||
if (dc_pop(&datum) == DC_SUCCESS){
|
||
tmpint = -1;
|
||
if (datum.dc_type == DC_NUMBER)
|
||
tmpint = dc_num2int(datum.v.number, DC_TRUE);
|
||
if (dc_pop(&datum) == DC_SUCCESS){
|
||
if (tmpint < 0)
|
||
fprintf(stderr,
|
||
"%s: array index must be a nonnegative integer\n",
|
||
progname);
|
||
else
|
||
dc_array_set(peekc, tmpint, datum);
|
||
}
|
||
}
|
||
return DC_EATONE;
|
||
case ';': /* retreive from array */
|
||
if (peekc == EOF)
|
||
return DC_EOF_ERROR;
|
||
if (dc_pop(&datum) == DC_SUCCESS){
|
||
tmpint = -1;
|
||
if (datum.dc_type == DC_NUMBER)
|
||
tmpint = dc_num2int(datum.v.number, DC_TRUE);
|
||
if (tmpint < 0)
|
||
fprintf(stderr,
|
||
"%s: array index must be a nonnegative integer\n",
|
||
progname);
|
||
else
|
||
dc_push(dc_array_get(peekc, tmpint));
|
||
}
|
||
return DC_EATONE;
|
||
|
||
default: /* What did that user mean? */
|
||
fprintf(stderr, "%s: ", progname);
|
||
dc_show_id(stdout, c, " unimplemented\n");
|
||
break;
|
||
}
|
||
return DC_OKAY;
|
||
}
|
||
|
||
|
||
/* takes a string and evals it */
|
||
int
|
||
dc_evalstr DC_DECLARG((string))
|
||
dc_data string DC_DECLEND
|
||
{
|
||
const char *s;
|
||
const char *end;
|
||
const char *p;
|
||
size_t len;
|
||
int c;
|
||
int peekc;
|
||
int count;
|
||
|
||
if (string.dc_type != DC_STRING){
|
||
fprintf(stderr,
|
||
"%s: eval called with non-string argument\n",
|
||
progname);
|
||
return DC_OKAY;
|
||
}
|
||
s = dc_str2charp(string.v.string);
|
||
end = s + dc_strlen(string.v.string);
|
||
while (s < end){
|
||
c = *(const unsigned char *)s++;
|
||
peekc = EOF;
|
||
if (s < end)
|
||
peekc = *(const unsigned char *)s;
|
||
switch (dc_func(c, peekc)){
|
||
case DC_OKAY:
|
||
break;
|
||
case DC_EATONE:
|
||
if (peekc != EOF)
|
||
++s;
|
||
break;
|
||
case DC_QUIT:
|
||
if (unwind_depth > 0){
|
||
--unwind_depth;
|
||
return DC_QUIT;
|
||
}
|
||
return DC_OKAY;
|
||
|
||
case DC_INT:
|
||
input_str_string = s - 1;
|
||
dc_push(dc_getnum(input_str, dc_ibase, &peekc));
|
||
s = input_str_string;
|
||
if (peekc != EOF)
|
||
--s;
|
||
break;
|
||
case DC_STR:
|
||
count = 1;
|
||
for (p=s; p<end && count>0; ++p)
|
||
if (*p == ']')
|
||
--count;
|
||
else if (*p == '[')
|
||
++count;
|
||
len = p - s;
|
||
dc_push(dc_makestring(s, len-1));
|
||
s = p;
|
||
break;
|
||
case DC_SYSTEM:
|
||
s = dc_system(s);
|
||
case DC_COMMENT:
|
||
s = memchr(s, '\n', (size_t)(end-s));
|
||
if (!s)
|
||
s = end;
|
||
else
|
||
++s;
|
||
break;
|
||
|
||
case DC_EOF_ERROR:
|
||
fprintf(stderr, "%s: unexpected EOS\n", progname);
|
||
return DC_OKAY;
|
||
}
|
||
}
|
||
return DC_OKAY;
|
||
}
|
||
|
||
|
||
/* This is the main function of the whole DC program.
|
||
* Reads the file described by fp, calls dc_func to do
|
||
* the dirty work, and takes care of dc_func's shortcomings.
|
||
*/
|
||
int
|
||
dc_evalfile DC_DECLARG((fp))
|
||
FILE *fp DC_DECLEND
|
||
{
|
||
int c;
|
||
int peekc;
|
||
dc_data datum;
|
||
|
||
stdin_lookahead = EOF;
|
||
for (c=getc(fp); c!=EOF; c=peekc){
|
||
peekc = getc(fp);
|
||
/*
|
||
* The following if() is the only place where ``stdin_lookahead''
|
||
* might be set to other than EOF:
|
||
*/
|
||
if (fp == stdin)
|
||
stdin_lookahead = peekc;
|
||
switch (dc_func(c, peekc)){
|
||
case DC_OKAY:
|
||
if (stdin_lookahead != peekc && fp == stdin)
|
||
peekc = getc(fp);
|
||
break;
|
||
case DC_EATONE:
|
||
peekc = getc(fp);
|
||
break;
|
||
case DC_QUIT:
|
||
if (unwind_noexit != DC_TRUE)
|
||
return DC_FAIL;
|
||
fprintf(stderr,
|
||
"%s: Q command argument exceeded string execution depth\n",
|
||
progname);
|
||
if (stdin_lookahead != peekc && fp == stdin)
|
||
peekc = getc(fp);
|
||
break;
|
||
|
||
case DC_INT:
|
||
input_fil_fp = fp;
|
||
input_pushback = c;
|
||
ungetc(peekc, fp);
|
||
dc_push(dc_getnum(input_fil, dc_ibase, &peekc));
|
||
break;
|
||
case DC_STR:
|
||
ungetc(peekc, fp);
|
||
datum = dc_readstring(fp, '[', ']');
|
||
dc_push(datum);
|
||
peekc = getc(fp);
|
||
break;
|
||
case DC_SYSTEM:
|
||
ungetc(peekc, fp);
|
||
datum = dc_readstring(stdin, '\n', '\n');
|
||
(void)dc_system(dc_str2charp(datum.v.string));
|
||
dc_free_str(&datum.v.string);
|
||
peekc = getc(fp);
|
||
break;
|
||
case DC_COMMENT:
|
||
while (peekc!=EOF && peekc!='\n')
|
||
peekc = getc(fp);
|
||
if (peekc != EOF)
|
||
peekc = getc(fp);
|
||
break;
|
||
|
||
case DC_EOF_ERROR:
|
||
fprintf(stderr, "%s: unexpected EOF\n", progname);
|
||
return DC_FAIL;
|
||
}
|
||
}
|
||
return DC_SUCCESS;
|
||
}
|