void jx_PrintAuthorInfo()
{
puts("Do you want to see the detail infomation about the program(Y/N):");
char ch = jx_getchar((short)1);
while((ch!='y') && (ch!= 'n'))
{
puts("Invalid Input,Please Input Again!");
ch = jx_getchar((short)1);
}
if(ch == 'y')
{
#ifdef _windows_
system("notepad.exe README.txt");
#endif
#ifdef _linux_
system("vim README.txt");
#endif
}
}
static int jx_scan_string_char( struct jx_parser *s )
{
int c = jx_getchar(s);
if(c==EOF) {
return EOF;
} else if(c=='\"') {
return 0;
} else if(c=='\\') {
c = jx_getchar(s);
switch(c) {
case 'b': return '\b';
case 'f': return '\f';
case 'n': return '\n';
case 'r': return '\r';
case 't': return '\t';
case 'u': return jx_scan_unicode(s);
default: return c;
}
} else {
return c;
}
}
static int jx_scan_unicode( struct jx_parser *s )
{
int i;
char str[5];
for(i=0;i<4;i++) {
str[i] = jx_getchar(s);
}
str[4] = 0;
int uc;
if(sscanf(str,"%x",&uc)) {
if(uc<=0x7f) {
// only accept basic ascii characters
return uc;
} else {
jx_parse_error(s,"unsupported unicode escape string");
return -1;
}
} else {
jx_parse_error(s,"invalid unicode escape string");
return -1;
}
}
static jx_token_t jx_scan( struct jx_parser *s )
{
int c;
if(s->putback_token_valid) {
s->putback_token_valid = 0;
return s->putback_token;
}
retry:
c = jx_getchar(s);
if(isspace(c)) {
goto retry;
} else if(c==EOF) {
return JX_TOKEN_EOF;
} else if(c=='{') {
return JX_TOKEN_LBRACE;
} else if(c=='}') {
return JX_TOKEN_RBRACE;
} else if(c=='[') {
return JX_TOKEN_LBRACKET;
} else if(c==']') {
return JX_TOKEN_RBRACKET;
} else if(c==',') {
return JX_TOKEN_COMMA;
} else if(c==':') {
return JX_TOKEN_COLON;
} else if(c=='\"') {
int i;
for(i=0;i<MAX_TOKEN_SIZE;i++) {
int n = jx_scan_string_char(s);
if(n==EOF) {
return JX_TOKEN_ERROR;
} else if(n==0) {
s->token[i] = n;
return JX_TOKEN_STRING;
} else {
s->token[i] = n;
}
}
jx_parse_error(s,"string constant too long");
return JX_TOKEN_ERROR;
} else if(strchr("+-0123456789.",c)) {
s->token[0] = c;
int i;
for(i=1;i<MAX_TOKEN_SIZE;i++) {
c = jx_getchar(s);
if(strchr("0123456789.-+eE",c)) {
s->token[i] = c;
} else {
s->token[i] = 0;
jx_ungetchar(s,c);
char *endptr;
s->integer_value = strtoll(s->token,&endptr,10);
if(!*endptr) return JX_TOKEN_INTEGER;
s->double_value = strtod(s->token,&endptr);
if(!*endptr) return JX_TOKEN_DOUBLE;
jx_parse_error(s,"invalid number format");
return JX_TOKEN_ERROR;
}
}
jx_parse_error(s,"integer constant too long");
return JX_TOKEN_ERROR;
} else if(isalpha(c) || c=='_') {
s->token[0] = c;
int i;
for(i=1;i<MAX_TOKEN_SIZE;i++) {
c = jx_getchar(s);
if(isalnum(c) || c=='_') {
s->token[i] = c;
} else {
jx_ungetchar(s,c);
s->token[i] = 0;
if(!strcmp(s->token,"true")) {
return JX_TOKEN_TRUE;
} else if(!strcmp(s->token,"false")) {
return JX_TOKEN_FALSE;
} else if(!strcmp(s->token,"null")) {
return JX_TOKEN_NULL;
} else {
return JX_TOKEN_SYMBOL;
}
}
}
jx_parse_error(s,"symbol too long");
return JX_TOKEN_ERROR;
} else {
s->token[0] = c;
s->token[1] = 0;
return JX_TOKEN_ERROR;
}
}
