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#include "l4arg.h"
#include "l4array.h"
#include <stdlib.h>
#include <string.h>
LbsStrv* lbs_arg_parse (const char* str, const char* delim,
const char* esc, const LbsArgQuote* q, LbsArray** detail_ptr) {
LbsStrv* strv = lbs_strv_new ();
if (strv == NULL) {
return NULL;
}
/* goto label => free_strv */
// string length cache
int qlen; // user-supplied quoting string table length
for (qlen = 0; q[qlen].left != NULL && q[qlen].right != NULL; qlen++);
// qlen will not be too long, so we can use VLA
int qlen_p = qlen <= 0 ? 1 : qlen;
#if __STDC_NO_VLA__
int* qllen = malloc (sizeof (int) * qlen_p);
if (qllen == NULL) {
lbs_strv_unref (strv);
return NULL;
}
int* qrlen = malloc (sizeof (int) * qlen_p);
if (qrlen == NULL) {
lbs_strv_unref (strv);
return NULL;
}
#else
int qllen[qlen_p]; // left quoting string length
int qrlen[qlen_p]; // right quoting string length
#endif
for (int i = 0; i < qlen; i++) {
// empty strings are not allowed
qllen[i] = strlen (q[i].left);
if (qllen[i] <= 0) {
goto free_strv;
}
qrlen[i] = strlen (q[i].right);
if (qrlen[i] <= 0) {
goto free_strv;
}
}
LbsArray* detail;
if (detail_ptr != NULL) {
detail = lbs_array_new (sizeof (int));
if (detail == NULL) {
goto free_strv;
}
if (lbs_array_push_back (detail, &(int){-1}) < 0) {
goto free_detail;
}
} else {
detail = NULL;
}
/* goto label => free_detail */
bool is_delimed = true;
bool is_escaped = false;
bool is_quoted = false;
bool ignore_esc = false;
int stri = 0; // strv index
int qi; // quoting string index currently used
const char* p = str;
for (; *p != '\0'; p++) {
loop_start:
if (is_escaped) {
if (lbs_strv_append_char (strv, stri, *p) < 0) {
goto free_detail;
}
is_escaped = false;
continue;
}
if (is_quoted) {
if (strncmp (p, q[qi].right, qrlen[qi]) == 0) {
is_quoted = false;
is_escaped = false;
ignore_esc = false;
p += qrlen[qi] - 1;
} else {
if (!ignore_esc && strchr (esc, *p)) {
is_escaped = true;
} else {
if (lbs_strv_append_char (strv, stri, *p) < 0) {
goto free_detail;
}
}
}
continue;
}
if (strchr (delim, *p)) {
if (is_delimed) {
continue;
}
if (lbs_strv_append_str_empty (strv) < 0) {
goto free_detail;
}
if (detail != NULL && lbs_array_push_back (detail, &(int){-1}) < 0) {
goto free_detail;
}
stri++;
is_delimed = true;
continue;
}
if (strchr (esc, *p)) {
is_escaped = true;
continue;
}
is_delimed = false;
for (int i = 0; i < qlen; i++) {
if (strncmp (p, q[i].left, qllen[i]) == 0) {
is_quoted = true;
ignore_esc = q[i].super;
qi = i;
p += qllen[qi]; // p++ will be skipped, so do not minus 1 here
if (detail != NULL) {
lbs_array_v (detail, int, stri) = qi;
}
goto loop_start; // restart the loop
}
}
if (lbs_strv_append_char (strv, stri, *p) < 0) {
goto free_detail;
}
}
if (is_delimed && lbs_strv_get_str_len (strv, stri) == 0) {
lbs_strv_remove_str (strv);
lbs_array_pop_back (detail);
}
if (detail_ptr != NULL) {
*detail_ptr = detail;
}
#if __STDC_NO_VLA__
free (qllen);
free (qrlen);
#endif
return strv;
/* Error-handling goto label */
free_detail:
if (detail != NULL) {
lbs_array_unref (detail);
}
free_strv:
#if __STDC_NO_VLA__
free (qllen);
free (qrlen);
#endif
lbs_strv_unref (strv);
return NULL;
}
LbsArgQopt* lbs_arg_qopt_new (const char* str) {
LbsStrv* strv;
LbsArray* detail;
strv = lbs_arg_parse (str, ",", "\\", (LbsArgQuote[]) {
{ "\"", "\"", false }, { "\'", "\'", true }, { NULL, NULL, false}},
&detail);
if (strv == NULL || detail == NULL) {
return NULL;
}
/* goto label => free_detail_and_strv */
size_t strv_len = lbs_strv_get_len (strv);
LbsArgQopt* qopt = malloc (sizeof (LbsArgQopt) +
sizeof (LbsArgQoptItem) * (strv_len + 1));
if (qopt == NULL) {
goto free_detail_and_strv;
}
qopt->len = strv_len;
qopt->strv = NULL;
qopt->detail = NULL;
qopt->opts[strv_len] = (LbsArgQoptItem) { NULL, NULL };
for (size_t i = 0; i < strv_len; i++) {
qopt->opts[i].name = lbs_strv_dup_str (strv, i);
if (qopt->opts[i].name == NULL) {
goto free_qopt;
}
char* pos = strchr (qopt->opts[i].name, '=');
if (pos == NULL) {
qopt->opts[i].value = NULL;
} else {
*pos = '\0';
qopt->opts[i].value = pos + 1;
}
}
qopt->strv = strv;
qopt->detail = detail;
return qopt;
free_qopt:
lbs_arg_qopt_free (qopt);
free_detail_and_strv:
lbs_strv_unref (strv);
lbs_array_unref (detail);
return NULL;
}
void lbs_arg_qopt_free_generic (void* qopt_generic) {
if (qopt_generic == NULL) {
return;
}
LbsArgQopt* qopt = qopt_generic;
lbs_strv_unref (qopt->strv);
lbs_array_unref (qopt->detail);
for (int i = 0; qopt->opts[i].name != NULL; i++) {
free (qopt->opts[i].name);
}
free (qopt);
}
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