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opts.c
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/* This software is Copyright 1995-1998 Peter Seebach. Please see the
* associated file "COPYRIGHT" for copyright information, or write
*/
#include "opts.h"
#include <ctype.h>
//#include <errno.h>
#include <limits.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
static char **oldargv = NULL;
static option *opts = NULL;
static char *last_optstring = NULL;
char *optsarg;
opt_value optsval;
option optsdummy;
int optsind = 1, optserr = 1;
int optsok = 1;
static enum { STYLE_POSIX, STYLE_TAR } optstyle;
static int curind = 1;
static int curloc = 0;
static size_t curlen = 0;
static int sense = 1;
static int ac;
static char **av;
static int cleanflag = 0;
static char *getarg(int, char**);
#define C(ptr, type) (*((type *) (ptr)))
#define P(ptr, type) ((type *) (ptr))
static char *typenames[] = {
"end of options",
"flag",
"flag",
"short integer",
"integer",
"long integer",
"string",
"buffer",
"real",
"multiple arguments",
"invalid type"
};
static int debug_flag = 0;
static option *incr_opt(void);
static int op_set(option *, char *);
static int optgetopt(int, char **);
static void warn(char *, ...);
static void error(char *, ...);
static void debug(char *, ...);
static void clean(void);
static char *rcname(char *);
static int badopt(void);
static void
error(char *s, ...)
{
va_list ap;
if (!optserr)
return;
fprintf(stderr, "error: ");
va_start(ap, s);
vfprintf(stderr, s, ap);
va_end(ap);
}
static void
debug(char *s, ...)
{
va_list ap;
if (!debug_flag)
return;
va_start(ap, s);
vfprintf(stderr, s, ap);
va_end(ap);
}
static void
warn(char *s, ...)
{
va_list ap;
if (!optserr)
return;
fprintf(stderr, "warning: ");
va_start(ap, s);
vfprintf(stderr, s, ap);
va_end(ap);
}
/* optssave() assumes that options refers to a valid array
* of options, or is NULL and that opts is valid. */
int
optssave(option *options, char *progname) {
option *op, *aop = NULL;
char *s = rcname(progname);
FILE *fp;
int ok = 1;
clean();
if (options)
opts = options;
if (!opts)
return -1;
fp = fopen(s, "w");
if (!fp) {
error("Couldn't open '%s' to save options\n", s);
return -1;
}
for (op = &options[0]; op->type; ++op) {
/* Preserve last argument met which is not a subarg... */
if (!(op->flags & OFLAG_ARG))
aop = op;
/* We cannot save:
* NUL options used to mark ends of lists
* Options not meant to be saved.
* Options with no value.
* Options which have the no-value flag.
*/
if (op->type == OTYPE_NUL && (op->flags & OFLAG_ARG))
continue;
if (!(op->flags & OFLAG_SAVE))
continue;
if ((op->type != OTYPE_NUL) && !op->value)
continue;
if (op->flags & OFLAG_NOVAL)
continue;
if (aop) {
if (aop->abbr) {
fprintf(fp, "%c", aop->abbr);
} else {
fprintf(fp, "%s", aop->name);
}
if ((op->type == OTYPE_ARG) ||
(op->flags & OFLAG_ARG)) {
fprintf(fp, "%c", '0' + (int) (op - aop));
}
}
switch (op->type) {
case OTYPE_NUL:
if (op->value)
fprintf(fp, ":\n");
else
fprintf(fp, "\n");
break;
case OTYPE_BOL:
if (C(op->value, int))
fprintf(fp, ":\n");
else
fprintf(fp, "\n");
break;
case OTYPE_SHR:
fprintf(fp, ":%d\n", C(op->value, short));
break;
case OTYPE_INT:
fprintf(fp, ":%d\n", C(op->value, int));
break;
case OTYPE_LNG:
fprintf(fp, ":%ld\n", C(op->value, long));
break;
case OTYPE_ARG:
fprintf(fp, ":\n");
break;
case OTYPE_STR:
if (C(op->value, char *)) {
fprintf(fp, ":%s\n", C(op->value, char *));
} else {
fprintf(fp, ":\n");
debug("invalid data for option '%s'.\n",
op->desc);
}
break;
case OTYPE_BUF:
fprintf(fp, ":%s\n", P(op->value, char));
break;
case OTYPE_DBL:
fprintf(fp, ":%f\n", C(op->value, double));
break;
default:
fprintf(fp, ":\n");
debug("option '%s' has invalid type %d\n",
op->desc, op->type);
ok = 0;
break;
}
}
fclose(fp);
return !ok;
}
int
optscheck(option *options) {
option **opttest;
option *op;
clean();
if (options) {
opts = options;
}
if (!opts) {
return -1;
}
opttest = calloc(256, sizeof(option *));
if (!opttest) {
warn("error allocating option coherence array\n");
return 1;
}
for (op = opts; op && op->type; ++op) {
if (op->abbr && opttest[op->abbr]) {
error("options '%s' and '%s' share option letter '%c'\n",
opttest[op->abbr]->desc,
op->desc,
op->abbr);
return 1;
} else {
opttest[op->abbr] = op;
}
if (op->value == NULL && op->type != OTYPE_NUL &&
op->type != OTYPE_ARG &&
!(op->flags & OFLAG_NOVAL)) {
error("option '%s' has no value to store anything in.\n", op->name);
return 1;
}
if (op->type == OTYPE_ARG) {
option *top = op, *aop = op;
for (top = top + 1; top->type && (top->type != OTYPE_NUL);
++top) {
if (!(top->flags & OFLAG_ARG)) {
error("suboption '%s' not an argument.\n",
top->name);
return 1;
}
}
if (top->type != OTYPE_NUL) {
error("unterminated list for option '%s'.\n",
aop->name);
return 1;
}
}
}
free(opttest);
opttest = NULL;
return 0;
}
int
optsload(option *options, char *progname) {
option *op;
FILE *fp = NULL;
char buf[256], *s;
int ok = 1;
int count = 0;
clean();
if (options)
opts = options;
if (!opts)
return -1;
fp = fopen(rcname(progname), "r");
if (!fp) {
debug("no options yet.\n");
return -1;
}
while (fgets(buf, 256, fp) != NULL) {
/* eliminate trailing newline, if any */
s = strrchr(buf, '\n');
if (s)
*s = '\0';
/* split around 1st ':' */
s = strchr(buf, ':');
if (s) {
*s = 0;
++s; /* ...and leave s pointing to what's after it */
}
if ((isdigit(buf[1]) && !buf[2]) || !buf[1]) {
if (buf[1]) {
count = buf[1] - '0';
} else {
count = 0;
}
for (op = &opts[0]; op->type; ++op) {
if (op->abbr == *buf)
break;
}
} else {
option *fop = NULL;
int i = strlen(buf);
if (isdigit(buf[i - 1])) {
count = buf[i - 1] - '0';
} else {
count = 0;
}
for (op = opts; op->type; ++op) {
if (!strncmp(op->name, buf, i)) {
if (!fop) {
fop = op;
} else {
error("ambiguous option '%s'\n",
buf);
warn("matches '%s' and '%s'\n",
fop->name, op->name);
}
}
}
if (fop)
op = fop;
}
/* if we found a valid option matching buf, we
* set it. s of null is valid for some options,
* we let op_set determine if this is ok.
*/
if (op->type) {
if ((op->type != OTYPE_ARG) || (count > 0)) {
/* 3rd arg of 1 -> set, not unset */
if (op_set(op + count, s))
ok = 0;
}
}
}
return !ok;
}
static char *
rcname(char *progname) {
static char buf[256], *s;
//s = getenv("HOME");
strcpy(s,"\\");
sprintf(buf, "%s/.%src", s ? s : "", progname);
return buf;
}
char *
optsusage(option *op) {
static char buf[1024];
int offset;
clean();
sprintf(buf, "\t%s", op->flags & OFLAG_ARG ? " " : "");
/* this would not be needed if Sun didn't suck. */
/* (sun's older systems have a defective sprintf which
* does not return the # of chars written. */
offset = strlen(buf);
if (op->abbr)
sprintf(buf + offset, "-%c | --%s\t'%s' [%s]",
op->abbr, op->name, op->desc, typenames[op->type]);
else
sprintf(buf + offset, "--%s\t'%s' [%s]",
op->name, op->desc, typenames[op->type]);
return buf;
}
char *
optsprint(option *op) {
static char buf[1024];
if ((op->type != OTYPE_NUL) && (op->type != OTYPE_ARG) && !op->value) {
sprintf(buf, "option '%s': invalid data",
op->desc);
return buf;
}
switch (op->type) {
case OTYPE_NUL:
sprintf(buf, "option '%s' %s.", op->desc,
op->value ? "set" : "unset");
break;
case OTYPE_BOL:
if (C(op->value, int))
sprintf(buf, "option '%s' set.",
op->desc);
else
sprintf(buf, "option '%s' unset.",
op->desc);
break;
case OTYPE_ARG:
sprintf(buf, "multi-arg option '%s':", op->desc);
break;
case OTYPE_SHR:
sprintf(buf, "option '%s': %d.",
op->desc, C(op->value, short));
break;
case OTYPE_INT:
sprintf(buf, "option '%s': %d.",
op->desc, C(op->value, int));
break;
case OTYPE_LNG:
sprintf(buf, "option '%s': %ld.",
op->desc, C(op->value, long));
break;
case OTYPE_STR:
if (C(op->value, char *))
sprintf(buf, "option '%s': %s.",
op->desc, C(op->value, char *));
else
sprintf(buf, "option '%s': invalid data",
op->desc);
break;
case OTYPE_BUF:
sprintf(buf, "option '%s': %s.",
op->desc, P(op->value, char));
case OTYPE_DBL:
sprintf(buf, "option '%s': %f.",
op->desc, C(op->value, double));
break;
default:
sprintf(buf, "invalid type %d for '%s'",
op->type, op->desc);
}
return buf;
}
option *
optsmake(char *str) {
option *ops, *op;
char *s;
int count = 0;
clean();
for (s = str; *s; ++s)
if (!strchr(":#", *s))
++count;
ops = malloc((count + 1) * sizeof(option));
if (!ops)
return NULL;
count = 0;
for (s = str; *s; ++s) {
op = &ops[count++];
op->abbr = *s;
op->name = "";
op->desc = "";
op->flags = OFLAG_NOVAL;
op->value = &optsval;
op->defalt = 0;
op->verify = 0;
op->settor = 0;
if (s[1] == ':') {
op->type = OTYPE_STR;
++s;
} else if (s[1] == '#') {
op->type = OTYPE_INT;
++s;
} else {
op->type = OTYPE_BOL;
}
}
op = &ops[count];
op->type = OTYPE_END;
op->abbr = '\0';
op->name = "";
op->desc = "";
op->flags = OFLAG_NONE;
op->value = 0;
op->defalt = 0;
op->verify = 0;
op->settor = 0;
return ops;
}
int
optsget(int argc, char **argv, option *op) {
if (argv != oldargv) {
optsind = 1;
curind = 1;
curloc = 0;
oldargv = argv;
}
if (op) {
opts = op;
if (optscheck(op))
return badopt();
} else {
return badopt();
}
return optgetopt(argc, argv);
}
int
optsopt(int argc, char **argv, char *str) {
static option *op = NULL;
clean();
if (argv != oldargv) {
optsind = 1;
curind = 1;
curloc = 0;
oldargv = argv;
}
if (!str) {
return badopt();
}
if (!last_optstring || strcmp(str, last_optstring) || !op) {
if (last_optstring) {
free(last_optstring);
last_optstring = malloc(strlen(str) + 1);
strcpy(last_optstring, str);
}
if (op) /* tolerance for broken sunos */
free(op);
op = optsmake(str);
}
if (op) {
opts = op;
return optgetopt(argc, argv);
} else {
return badopt();
}
}
/* do the getopts thang. */
int
optsgets(int argc, char **argv, option *options) {
int ok = 1;
int arg;
if (argv != oldargv) {
optsind = 1;
curind = 1;
curloc = 0;
oldargv = argv;
}
if (options) {
if (optscheck(options))
return 1;
opts = options;
}
while (ok && ((arg = optgetopt(argc, argv)) != -1)) {
debug("ogo loop, curind/optsind is now %d/%d\n",
curind, optsind);
if (arg == '?') {
ok = 0;
}
}
return !ok || !optsok;
}
static void
clean(void) {
if (cleanflag) {
if (C(&optsval, char *))
free(C(&optsval, char *));
cleanflag = 0;
}
}
static int
op_set(option *op, char *s) {
opt_value backup;
opt_value *saveval = NULL;
char *t;
long l;
double d;
int ret = 0;
char buf_temp[1024];
if (!op) {
warn("internal error, op_set called without option\n");
return 1;
}
debug("op_set: option '%s', set from '%s'\n", op->name,
s ? s : "<null pointer>");
if ((op->flags & OFLAG_SET) && (op->flags & OFLAG_CONST)) {
warn("option '%s' was already set.\n", op->name);
return 1;
}
if (op->flags & OFLAG_NOVAL) {
saveval = op->value;
op->value = &optsval;
/* and we have to initialize it, so it will be safe to read */
switch (op->type) {
case OTYPE_SHR:
C(op->value, short) = 0;
break;
case OTYPE_INT: case OTYPE_BOL:
C(op->value, int) = 0;
break;
case OTYPE_LNG:
C(op->value, long) = 0;
break;
case OTYPE_DBL:
C(op->value, double) = 0;
break;
case OTYPE_STR:
C(op->value, char *) = NULL;
break;
case OTYPE_ARG:
break;
}
}
if (op->verify && ((op->type == OTYPE_NUL) || op->value)) {
switch (op->type) {
default: break;
case OTYPE_NUL: backup.v_int = !!op->value; break;
case OTYPE_BOL:
case OTYPE_INT: backup.v_int = C(op->value, int); break;
case OTYPE_SHR: backup.v_short = C(op->value, short); break;
case OTYPE_LNG: backup.v_long = C(op->value, long); break;
case OTYPE_STR: backup.v_str = C(op->value, char *); break;
case OTYPE_BUF: buf_temp[0] = '\0';
strncpy(buf_temp, P(op->value, char), 1024);
break;
case OTYPE_DBL: backup.v_double = C(op->value, double); break;
}
}
if (!s) {
if (((op->type != OTYPE_BOL) && (op->type != OTYPE_NUL)) &&
!(op->flags & OFLAG_DFL)) {
warn("option '%c' ['%s'] improperly specified,"
" or wrongly negated.\n", op->abbr, op->desc);
ret = 1;
}
if (op->defalt) {
switch (op->type) {
case OTYPE_NUL:
op->value = &optsval;
break;
case OTYPE_SHR:
C(op->value, short) = C(op->defalt, short);
break;
case OTYPE_INT: case OTYPE_BOL:
C(op->value, int) = C(op->defalt, int);
break;
case OTYPE_LNG:
C(op->value, long) = C(op->defalt, long);
break;
case OTYPE_DBL:
C(op->value, double) = C(op->defalt, double);
break;
case OTYPE_STR:
if (!(op->flags & OFLAG_NOVAL) &&
C(op->value, char *))
free(C(op->value, char *));
C(op->value, char *) =
malloc(strlen(C(op->defalt, char *)) + 1);
if (C(op->value, char *))
strcpy(C(op->value, char *),
C(op->defalt, char *));
break;
case OTYPE_ARG:
break;
}
} else {
switch (op->type) {
case OTYPE_NUL:
op->value = NULL;
break;
case OTYPE_SHR:
C(op->value, short) = 0;
break;
case OTYPE_INT: case OTYPE_BOL:
C(op->value, int) = 0;
break;
case OTYPE_LNG:
C(op->value, long) = 0;
break;
case OTYPE_DBL:
C(op->value, double) = 0;
break;
case OTYPE_STR:
if (!(op->flags & OFLAG_NOVAL) && C(op->value, char *))
free(C(op->value, char *));
C(op->value, char *) = NULL;
case OTYPE_ARG:
break;
}
}
} else {
if (((op->type != OTYPE_NUL) && (op->type != OTYPE_BOL))
&& !op->value) {
error("invalid data for option '%s'\n",
op->name);
ret = 1;
}
switch (op->type) {
case OTYPE_NUL:
op->value = &optsval;
break;
case OTYPE_SHR:
l = strtol(s, &t, 0);
if ((l > (long) SHRT_MAX) || (l < (long) SHRT_MIN)) {
warn("'%s' is out of range for a short.\n", s);
}
if (*t) {
error("'%s' does not look like an integer.\n",
s);
ret = 1;
} else {
C(op->value, short) = (short) l;
}
break;
case OTYPE_BOL:
C(op->value, int) = 1;
break;
case OTYPE_INT:
l = strtol(s, &t, 0);
if ((l > (long) INT_MAX) || (l < (long) INT_MIN)) {
warn("'%s' is out of range for an int.\n", s);
}
if (*t) {
error("'%s' does not look like an integer.\n",
s);
ret = 1;
} else {
C(op->value, int) = (int) l;
}
break;
case OTYPE_LNG:
l = strtol(s, &t, 0);
if (*t) {
error("'%s' does not look like an integer.\n",
s);
return 1;
} else {
C(op->value, long) = l;
}
break;
case OTYPE_STR:
/* if we verify, we can't free this here */
if (!(op->flags & OFLAG_NOVAL) &&
C(op->value, char *) && !op->verify)
free(C(op->value, char *));
t = malloc(strlen(s) + 1);
strcpy(t, s);
C(op->value, char *) = t;
break;
case OTYPE_BUF:
strcpy(P(op->value, char), s);
break;
case OTYPE_DBL:
d = strtod(s, &t);
if (*t) {
error("'%s' does not look like a real.\n", s);
ret = 1;
} else {
C(op->value, double) = d;
}
break;
case OTYPE_ARG:
error("cannot set 'argument' option '%s'.\n",
op->desc);
ret = 1;
break;
default:
error("option '%s' has invalid type %d\n",
op->desc, op->type);
ret = 1;
break;
}
}
if (op->type == OTYPE_NUL)
optsval.v_int = !!op->value;
else if (op->value && (op->value != &optsval)) {
switch (op->type) {
default:
case OTYPE_INT: case OTYPE_BOL:
optsval.v_int = C(op->value, int); break;
case OTYPE_SHR:
optsval.v_short = C(op->value, short); break;
case OTYPE_LNG:
optsval.v_long = C(op->value, long); break;
case OTYPE_STR:
optsval.v_str = C(op->value, char *); break;
case OTYPE_DBL:
optsval.v_double = C(op->value, double); break;
}
}
if (op->verify && !op->verify(op, &optsval)) {
switch (op->type) {
default:
case OTYPE_NUL:
op->value = backup.v_int ? &optsval : NULL;
break;
case OTYPE_INT: case OTYPE_BOL:
C(op->value, int) = backup.v_int;
break;
case OTYPE_SHR: C(op->value, short) = backup.v_short; break;
case OTYPE_LNG: C(op->value, long) = backup.v_long; break;
case OTYPE_STR:
if (!(op->flags & OFLAG_NOVAL) && C(op->value, char *))
free(C(op->value, char *));
C(op->value, char *) = backup.v_str;
break;
case OTYPE_BUF:
P(op->value, char)[0] = '\0';
strncat(P(op->value, char), buf_temp, 1024);
break;
case OTYPE_DBL: C(op->value, double) = backup.v_double; break;
}
} else {
/* if we were verifying, now we need to do this... */
if (op->verify && (op->type == OTYPE_STR))
free(backup.v_str);
if (op->settor)
op->settor(op, &optsval);
if (op->flags & OFLAG_NOVAL)
op->value = saveval;
op->flags |= OFLAG_SET;
}
if (op->type == OTYPE_NUL)
optsval.v_int = !!op->value;
else if (op->value && (op->value != &optsval)) {
switch (op->type) {
default:
case OTYPE_INT: case OTYPE_BOL:
optsval.v_int = C(op->value, int); break;
case OTYPE_SHR:
optsval.v_short = C(op->value, short); break;
case OTYPE_LNG:
optsval.v_long = C(op->value, long); break;
case OTYPE_STR:
optsval.v_str = C(op->value, char *); break;
case OTYPE_DBL:
optsval.v_double = C(op->value, double); break;
}
if (op->is_set)
*op->is_set = 1;
}
if ((op->value == &optsval) && (op->type == OTYPE_STR))
cleanflag = 1;
else
cleanflag = 0;
return ret;
}
option *
optsfind(int c, char *s, option *options) {
int i;
option *op, *fop = NULL;
if (!options)
options = opts;
if (!options)
return 0;
if (c) {
for (op = options; op->type; ++op) {
if (op->abbr == c) {
optsok = 1;
return op;
}
}
optsok = 0;
return NULL;
} else {
i = strlen(s);
for (op = options; op->type; ++op) {
if (op->name && !strncmp(op->name, s, i)) {
if (!fop) {
fop = op;
} else {
error("ambiguous option '%s'\n", s);
warn("matches '%s' and '%s'\n",
fop->name, op->name);
curloc = 0;
optsok = 0;
return NULL;
}
}
}
}
if (fop)
optsok = 1;
else
optsok = 0;
return fop;
}
static option *
incr_opt(void) {
char *s = av[curind];
if (curind >= ac || !s)
return NULL;
if (s)
curlen = strlen(s);
debug("incr_opt: s: %s, curind %d, curloc %d, curlen %d\n",
s ? s : "null",
curind, curloc, curlen);
if ((curloc > 0) && ((curloc >= curlen) || !s[curloc])) {
/* we think we're in a word, but it's done */
curloc = -1;
if (curind < optsind)
curind = optsind;
else {
++curind;
++optsind;
}
s = av[curind];
if (!s)
return NULL;
curlen = strlen(s);
} else if (curloc > 0) {
if (s[curloc] == '!') {
++curloc;
if (sense == 0) {
warn("ain't no double negatives allowed.\n");
}
sense = !sense;
return incr_opt();
} else {
return optsfind(s[curloc++], 0, opts);
}
}
/* at this point curloc is 0 or lower, i.e., we're at the
* beginning of a word.
*/
if (s[0] == '-') {
/* maybe an option */
if (s[1] == '-') {
if (s[2] == '\0') {
if (optsind <= curind)
optsind = curind + 1;
return NULL;
}
/* we think we are in a -- option */
debug("incr_opt (--) opts/cur %s/%s\n",
av[optsind], av[curind]);
if (strncmp(s + 2, "no-", 3) == 0) {
if (sense == 0) {
warn("ain't no double negatives allowed.\n");
}
sense = 0;
curloc = curlen;
return optsfind(0, s + 5, opts);
} else {
curloc = curlen;
return optsfind(0, s + 2, opts);
}
}
if (s[1] == '\0')
return NULL;
curloc = 1;
return incr_opt();
} else {
optsok = 1; /* we can handle this. */
return NULL;
}