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#include "l4arg.h"
#include "l4array.h"
#include <string.h>
#include <stdlib.h>
/* 基本上優先順序是 escape -> quoting -> delimiter */
#define abort_l4arg_toargv \
do{ \
l4da_free(parr); \
l4da_free(tmpstr); \
return NULL; \
}while(0)
char** l4arg_toargv(const char* str,
const char* delim, const char* quoting, const char* esc){
int i;
char escaped = 0, quoted = 0, delimed = 0;
L4DA* parr;
L4DA* tmpstr;
char* addstr, tmpchar;
char** rval;
parr = l4da_create(sizeof(char*), 0);
if(parr == NULL){
return NULL;
}
tmpstr = l4da_create(sizeof(char), 0);
if(tmpstr == NULL){
l4da_free(parr);
return NULL;
}
for(i=0; str[i]!='\0'; i++){
if(escaped){
if(l4da_pushback(tmpstr, &str[i]) < 0){
abort_l4arg_toargv;
}
escaped = 0;
delimed = 0;
continue;
}
if(quoted){
if(strchr(quoting, str[i]) != NULL){
quoted = 0;
continue;
}
if(l4da_pushback(tmpstr, &str[i]) < 0){
abort_l4arg_toargv;
}
delimed = 0;
continue;
}
if(strchr(esc, str[i]) != NULL){
escaped = 1;
continue;
}
if(strchr(quoting, str[i]) != NULL){
quoted = 1;
continue;
}
if(strchr(delim, str[i]) != NULL){
if(l4da_getlen(tmpstr) > 0){
tmpchar = '\0';
if(l4da_pushback(tmpstr, &tmpchar) < 0){
abort_l4arg_toargv;
}
addstr = (char*)l4da_drop_struct(tmpstr);
if(l4da_pushback(parr, &addstr) < 0){
l4da_free(parr);
return NULL;
}
tmpstr = l4da_create(sizeof(char), 0);
if(tmpstr == NULL){
l4da_free(parr);
return NULL;
}
}
delimed = 1;
continue;
}
if(l4da_pushback(tmpstr, &str[i]) < 0){
abort_l4arg_toargv;
}
delimed = 0;
}
if(!delimed){
tmpchar = '\0';
if(l4da_pushback(tmpstr, &tmpchar) < 0){
abort_l4arg_toargv;
}
addstr = (char*)l4da_drop_struct(tmpstr);
if(l4da_pushback(parr, &addstr) < 0){
l4da_free(parr);
return NULL;
}
}
addstr = NULL;
if(l4da_pushback(parr, &addstr) < 0){
l4da_free(parr);
return NULL;
}
rval = (char**)l4da_drop_struct(parr);
return rval;
}
void l4arg_toargv_free(char** pargv){
int i;
for(i=0; pargv[i]!=NULL; i++){
free(pargv[i]);
}
free(pargv);
}
/* 為什麼叫做 qarg 呢？因為這是用來解析很像 QEMU 命令列參數的參數 */
L4QARG* l4qarg_parse(const char* str){
char** pargv = l4arg_toargv(str, ",", "\"\'", "\\");
if(pargv == NULL){
return NULL;
}
int i, allc;
L4QARG* qargarr;
char* pos;
for(i=0; pargv[i]!=NULL; i++);
allc = i + 1;
qargarr = (L4QARG*) malloc(sizeof(L4QARG) * allc);
if(qargarr == NULL){
l4arg_toargv_free(pargv);
return NULL;
}
for(i=0; pargv[i]!=NULL; i++){
pos = strchr(pargv[i], '=');
if(pos == NULL){
qargarr[i].arg_name = pargv[i];
qargarr[i].arg_value = NULL;
}else{
*pos = '\0';
qargarr[i].arg_name = pargv[i];
pos++;
qargarr[i].arg_value = (char*) malloc(strlen(pos)+1);
if(qargarr[i].arg_value == NULL){
l4arg_toargv_free(pargv);
return NULL;
}
strcpy(qargarr[i].arg_value, pos);
}
}
free(pargv);
qargarr[i].arg_name = NULL;
qargarr[i].arg_value = NULL;
return qargarr;
}
void l4qarg_free(L4QARG* qarg){
int i;
for(i=0; !(qarg[i].arg_name == NULL && qarg[i].arg_value == NULL); i++){
free(qarg[i].arg_name);
if(qarg[i].arg_value != NULL){
free(qarg[i].arg_value);
}
}
free(qarg);
}
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