char *asn_replace(const char *regex, const char *rep, const char *str, mmatic *mm)
{
int cv[CVS], cvn, rc, br, offset = 0, len = strlen(str);
xstr *xs = MMXSTR_CREATE("");
char *mem = malloc(strlen(rep) + 1), *p, *bs;
while ((rc = _regex_match(regex, str, len, offset, cv, &cvn)) == 1 && cv[0] >= 0 && cv[1] >= cv[0]) {
if (cv[0] >= len) break;
dbg(8, "asn_replace(): matched at %d-%d (rc=%d, offset=%d)\n", cv[0], cv[1], rc, offset);
/* copy text up to the first match */
xstr_append_size(xs, str+offset, cv[0]-offset);
/* replace, handling backreferences */
strcpy(mem, rep);
for (bs = p = mem; (bs = strchr(bs, '\\'));) {
if (!bs[1] || !isdigit(bs[1])) continue;
/* append everything up to \, position bs on the number */
*bs++ = '\0';
xstr_append(xs, p);
/* position p on the end of the number + 1 */
for (p = bs; *p && isdigit(*p); p++);
/* substitute */
br = atoi(bs);
if (br++ > 0 && br <= cvn) {
# define IB (2*br - 2)
# define IT (2*br - 1)
dbg(9, "asn_replace(): appending backreference %d between %d and %d\n", br-1, cv[IB], cv[IT]-1);
xstr_append_size(xs, str + cv[IB], cv[IT] - cv[IB]);
}
else {
dbg(1, "asn_replace(): invalid backreference: %d\n", br-1);
}
bs = p;
}
/* in no backreferences case, this appends the whole "rep" string */
xstr_append(xs, p);
/* start next match after
* XXX: pcreapi(3) manual page says "The first element of a pair is set to the offset of the first character in
* a substring, and the second is set to the offset of the first character *after* the end of a substring.", but
* does not mention that e.g. a pattern of just /$/m will return cv[1] == cv[0]! */
offset = cv[1] + (cv[1] == cv[0]);
if (offset >= len) break;
}
if (offset <= len);
xstr_append(xs, str + offset); /* may be just "" */
free(mem);
return xs->s;
}
int script_process_line(char *buf)
{
int ret = -ENOTSUP;
struct timespec ts = { .tv_sec = 0, .tv_nsec = 0 };
struct timespec tse;
if (_perf_measure)
ts = utils_get_time( TIME_CURRENT );
/* Skip if it's a one line comment (more to be implemented) */
if (is_comment(buf) == 1) {
DPRINTF("%s: Found comment, skipping\n", __FUNCTION__);
ret = 0;
goto cleanup;
}
else
if (strcmp(buf, "else {") == 0) {
/* Reverse the condition */
if ((_script_in_condition_and_met == 1)
|| (_script_in_condition_and_met == -10))
_script_in_condition_and_met = 0;
else
if ((_script_in_condition_and_met == 0)
|| (_script_in_condition_and_met == -20))
_script_in_condition_and_met = 1;
else
if (_script_in_condition_and_met != -1) {
DPRINTF("%s: Invalid state for else statement\n", __FUNCTION__);
ret = -EINVAL;
goto cleanup;
}
ret = 0;
goto cleanup;
}
else
if (strcmp(buf, "}") == 0) {
_script_in_condition_and_met = (_script_in_condition_and_met == 1) ? -10 : -20;
ret = 0;
goto cleanup;
}
if (_script_in_condition_and_met < -1)
_script_in_condition_and_met = 1;
if (_script_in_condition_and_met == 0) {
ret = 0;
goto cleanup;
}
/* Comparison with no ternary operator support... yet */
if (regex_match("if \\(([^(]*)([^)]*)\\)", buf)) {
if (regex_match("if \\(([^(]*) == ([^)]*)\\) {", buf)) {
char **matches = NULL;
int i, num_matches;
matches = (char **)utils_alloc( "scripting.script_process_line.matches", sizeof(char *) );
_regex_match("if \\(([^(]*) == ([^)]*)\\) {", buf, matches, &num_matches);
if (num_matches >= 2)
_script_in_condition_and_met = (valcmp(matches[0], matches[1]) == 0) ? 1 : 0;
for (i = 0; i < num_matches; i++)
matches[i] = utils_free("scripting.condition.matches[]", matches[i]);
matches = utils_free("scripting.condition.matches", matches);
}
}
else
/* Definition */
if (strncmp(buf, "define ", 7) == 0) {
tTokenizer t;
t = tokenize(buf + 7, " ");
if (t.numTokens != 2) {
ret = -EINVAL;
goto cleanup;
}
if (variable_create(trim(t.tokens[0]), trim(t.tokens[1])) != 1) {
ret = -EIO;
goto cleanup;
}
}
else
/* Operators */
if ((strstr(buf, "+=") != NULL) || (strstr(buf, "-=") != NULL) ||
(strstr(buf, "%=") != NULL) || (strstr(buf, "*=") != NULL) ||
(strstr(buf, "/=") != NULL)) {
tTokenizer t;
char *var;
char *val;
int op, vtype;
t = tokenize(buf, "=");
if (t.numTokens != 2) {
ret = -EINVAL;
goto cleanup;
}
var = trim(strdup(t.tokens[0]));
val = trim(strdup(t.tokens[1]));
op = var[ strlen(var) - 1];
var[ strlen(var) - 1] = 0;
var = trim(var);
if (val[strlen(val) - 1] == ';')
val[strlen(val) - 1] = 0;
val = trim(val);
vtype = variable_get_type(var, NULL);
if ((vtype == TYPE_INT) || (vtype == TYPE_LONG)) {
char tmp[32] = { 0 };
long value = atol(variable_get_element_as_string(var, NULL));
if (op == '+')
value += atol(val);
else
if (op == '-')
value -= atol(val);
else
if (op == '*')
value *= atol(val);
else
if (op == '%')
value %= atol(val);
else
if (op == '/')
value /= atol(val);
snprintf(tmp, sizeof(tmp), "%ld", value);
variable_set_deleted(var, 1);
variable_add(var, tmp, TYPE_QSCRIPT, -1, vtype);
ret = 0;
}
else
ret = -EINVAL;
var = utils_free("scripting.operators.var", var);
val = utils_free("scripting.operators.val", val);
free_tokens(t);
return ret;
}
else
/* Assignment */
if (is_assignment(buf)) {
tTokenizer t;
t = tokenize(buf, "=");
char *val = strdup( trim(t.tokens[1]) );
if (val[strlen(val) - 1] == ';') {
val[strlen(val) - 1] = 0;
if (is_numeric(val) || is_string(val)) {
if (is_string(val)) {
*val++;
val[strlen(val) - 1] = 0;
}
if (variable_add(trim(t.tokens[0]), val, TYPE_QSCRIPT, -1, gettype(val)) < 0) {
desc_printf(gIO, gFd, "Cannot set new value to variable %s\n", trim(t.tokens[0]));
ret = -EEXIST;
}
else
ret = 0;
}
else
if (regex_match("([^(]*)([^)]*)", val)) {
tTokenizer t2;
char *args = NULL;
char *fn;
t2 = tokenize(val, "(");
if (t2.tokens[t2.numTokens - 1][strlen(t2.tokens[t2.numTokens - 1]) - 1] != ')') {
ret = -EINVAL;
goto cleanup;
}
t2.tokens[t2.numTokens - 1][strlen(t2.tokens[t2.numTokens - 1]) - 1] = 0;
fn = strdup(t2.tokens[0]);
/* We need to make sure parenthesis won't break script line */
if (t2.numTokens > 1) {
int i;
char argstmp[8192] = { 0 };
for (i = 1; i < t2.numTokens; i++) {
strcat(argstmp, t2.tokens[i]);
if (i < t2.numTokens - 1)
strcat(argstmp, "(");
}
args = strdup(argstmp);
}
if (args != NULL) {
char args2[1024] = { 0 };
snprintf(args2, sizeof(args2), "%s", args + 1);
args2[ strlen(args2) - 1] = 0;
args = utils_free("scripting.function-call.args", args);
args = strdup( args2 );
}
free_tokens(t2);
if (_script_builtin_function(trim(t.tokens[0]), fn, args) != 0)
DPRINTF("Function %s doesn't seem to be builtin, we should try user-defined function\n", fn);
DPRINTF("%s: Should be a function with return value\n", __FUNCTION__);
args = utils_free("scripting.function-call.args", args);
fn = utils_free("scripting.function-call.fn", fn);
ret = 0;
}
else
ret = -EINVAL;
}
free_tokens(t);
}
else
if (regex_match("([^(]*)([^)]*)", buf)) {
tTokenizer t2;
char *args = NULL;
char *fn;
t2 = tokenize(buf, "(");
if (t2.tokens[t2.numTokens - 1][strlen(t2.tokens[t2.numTokens - 1]) - 1] != ';') {
ret = -EINVAL;
goto cleanup;
}
t2.tokens[t2.numTokens - 1][strlen(t2.tokens[t2.numTokens - 1]) - 1] = 0;
fn = strdup(t2.tokens[0]);
/* We need to make sure parenthesis won't break script line */
if (t2.numTokens > 1) {
int i;
char argstmp[8192] = { 0 };
for (i = 1; i < t2.numTokens; i++) {
strcat(argstmp, t2.tokens[i]);
if (i < t2.numTokens - 1)
strcat(argstmp, "(");
}
args = strdup(argstmp);
}
if (args != NULL) {
if (args[strlen(args) - 1] == ')')
args[strlen(args) - 1] = 0;
}
free_tokens(t2);
if (_script_builtin_function(NULL, fn, args) != 0)
DPRINTF("Function %s doesn't seem to be builtin, we should try user-defined function\n", fn);
args = utils_free("scripting.function-call.args", args);
fn = utils_free("scripting.function-call.fn", fn);
ret = 0;
}
else
DPRINTF("%s: Not implemented yet\n", __FUNCTION__);
cleanup:
if ((_perf_measure) && ((ts.tv_nsec > 0) && (ts.tv_sec > 0)) && (_script_in_condition_and_met > 0)) {
tse = utils_get_time( TIME_CURRENT );
desc_printf(gIO, gFd, "PERF: Line \"%s\" was being processed for %.3f microseconds (%.3f ms)\n\n",
buf, get_time_float_us( tse, ts ), get_time_float_us(tse, ts) / 1000.);
}
return ret;
}
int run_script(char *filename)
{
FILE *fp;
int opened = 0;
char buf[4096] = { 0 };
struct timespec ts = utils_get_time( TIME_CURRENT );
struct timespec tse;
if (access(filename, R_OK) != 0)
return -ENOENT;
_script_in_condition_and_met = -1;
fp = fopen(filename, "r");
if (fp == NULL)
return -EPERM;
if (gHttpHandler)
http_host_header(gIO, gFd, HTTP_CODE_OK, gHost, "text/html", NULL, myRealm, 0);
while (!feof(fp)) {
memset(buf, 0, sizeof(buf));
fgets(buf, sizeof(buf), fp);
if ((strlen(buf) > 1) && (buf[strlen(buf) - 1] == '\n'))
buf[strlen(buf) - 1] = 0;
if ((strlen(buf) > 1) && (buf[0] != '\n')) {
if (strcmp(buf, "<$") == 0)
opened = 1;
if (strcmp(buf, "$>") == 0)
opened = 0;
if ((opened) && (strcmp(buf, "<$") != 0))
script_process_line(trim(buf));
}
}
fclose(fp);
idb_free_last_select_data();
if (_perf_measure) {
tse = utils_get_time( TIME_CURRENT );
desc_printf(gIO, gFd, "PERF: File \"%s\" has been processed in %.3f microseconds (%.3f ms)\n\n",
basename(filename), get_time_float_us( tse, ts ), get_time_float_us(tse, ts) / 1000.);
}
variable_dump();
variable_free_all();
return 0;
}
int asn_match(const char *regex, const char *str)
{
int cv[CVS];
return _regex_match(regex, str, strlen(str), 0, cv, NULL);
}