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rpg_json_import.c
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rpg_json_import.c
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#include "rpg_json_import.h"
#define INC_ON_SU if ( *out_i > -1 ) { *out_i=*out_i+1;}
#define FIND_START_OF(b,l,c,i) ret = find_start_of(b,l,c,&i);ENSURE_SUCCEEDED
#define ATTRIBUTE_LIST(b,l,i) FIND_START_OF(b,l,'{',i);
#define START_OF_ATTR(b,l,i) FIND_START_OF(b,l,'"',i);
#define ATTR_DIV(b,l,i) FIND_START_OF(b,l,':',i);
#define NEXT_VAL(b,l,i) FIND_START_OF(b,l,'"',i);
#define END_OF_NAME(b,l,i) ret = end_of_name(b,l,&i);ENSURE_SUCCEEDED
#define END_OF_VALUE(b,l,i) ret = end_of_value(b,l,&i);ENSURE_SUCCEEDED
#define NEXT_ATTR(b,l,i) ret = next_attr(b,l,&i);ENSURE_SUCCEEDED
#define READ_ATTR_TO_HASH(b,l,i,r) ret = read_attr_to_hash(p,b,l,&i,r);ENSURE_SUCCEEDED
#define ENSURE_INDEX_VALID if ( i == -1 ) { *out_i = -1; return SUCCESS; }
int chrpos( char *buffer, int len, char c, int *out_i ) {
int i;
for( i=*out_i;i<len;i++ ) {
if ( buffer[i] == c ) { //found it
*out_i = i;
return SUCCESS;
} else if ( buffer[i] == ' ' ) { //legal white space
} else { //illegal character
*out_i = -1;
return SUCCESS;
}
}
*out_i = -1;
return SUCCESS;
}
int end_of_name( char *buffer, int len, int *out_i ) {
int i;
for( i=*out_i;i<len;i++ ) {
if ( buffer[i] == '"' ) { //found it
*out_i = i-1;
return SUCCESS;
}
}
*out_i = -1;
return SUCCESS;
}
int end_of_value( char *buffer, int len, int *out_i ) {
int i;
for( i=*out_i;i<len;i++ ) {
if ( buffer[i] == '"' ) { //found it
*out_i = i-1;
return SUCCESS;
}
}
*out_i = -1;
return SUCCESS;
}
int find_start_of( char *buffer, int len, char c, int *out_i ) {
int ret = chrpos( buffer, len, c, out_i );ENSURE_SUCCEEDED
INC_ON_SU;
return SUCCESS;
}
int next_attr( char *buffer, int len, int *out_i ) {
int ret;
int i;
for( i=*out_i;i<len;i++ ) {
if ( buffer[i] == '}' ) { //end of object
*out_i = -2;
return SUCCESS;
} else if ( buffer[i] == ',' ) {
int j=i+1;
START_OF_ATTR(buffer, len, j );
*out_i = j;
return SUCCESS;
} else if ( buffer[i] == ' ' ) { //legal white space
} else { //illegal character
*out_i = -1;
return SUCCESS;
}
}
*out_i = -1;
return SUCCESS;
}
//I think this could be replace with strncpy
int copy_string_from_buffer( char *buffer, char *string, int start, int end ) {
int i=0;
int j=0;
for( i=start;i<=end;i++ ) {
string[j++] = buffer[i];
}
string[j] = '\0';
return SUCCESS;
}
int read_value_from_buffer( apr_pool_t *p, char *buffer, int len, int *out_i, char **out_value ) {
int i = *out_i;
while( i < len && buffer[i] == ' ' ) { i++; }; //spin through the whitespace
if ( i == len ) {
*out_i = -1;
return SUCCESS;
}
if ( buffer[i] == '"' ) {
int ret;
char *value = (char *)apr_palloc(p, DEFAULT_BUFFER_SIZE);
i++;
int start=i;
END_OF_VALUE(buffer,len,i);ENSURE_INDEX_VALID;
ret = copy_string_from_buffer( buffer, value, start, i );ENSURE_SUCCEEDED;ENSURE_INDEX_VALID;
i=i+2;
*out_value = value;
*out_i = i;
return SUCCESS;
}
if ( buffer[i] == 'n' ) {
if ( ( i + 4 ) < len && !strncmp( &buffer[i], "null", 4 ) ) {
i = i + 4;
*out_value = NULL;
*out_i = i;
return SUCCESS;
}
}
*out_i = -1;
return SUCCESS;
}
int read_attr_to_hash( apr_pool_t *p, char *buffer, int len, int *out_i, struct _rpg_hash *r ) {
int ret;
int i=*out_i;
char name[DEFAULT_BUFFER_SIZE];
char *value;
{
int start = i;
END_OF_NAME(buffer,len,i);
ret = copy_string_from_buffer( buffer, name, start, i );ENSURE_SUCCEEDED;ENSURE_INDEX_VALID;
i=i+2;
}
ATTR_DIV(buffer,len,i);ENSURE_INDEX_VALID;
{
ret = read_value_from_buffer( p, buffer, len, &i, &value );ENSURE_SUCCEEDED;ENSURE_INDEX_VALID
}
RPG_HASH_SET_STRING( r, name, value );
*out_i = i;
return SUCCESS;
}
//{"hid":"198","name":"Mangatewai","psm":"16 Oct 2012","psc":"25 Jul 2012","mapref":""}"
int rpg_json_import( apr_pool_t *p, char *b, struct _rpg_hash **out_r ) {
int ret;
struct _rpg_hash *r;
int l = strlen( b );
int i;
#define ENSURE_INDEX_VALID_R if ( i == -1 ) { *out_r = NULL; return SUCCESS; }
RPG_HASH_INIT(r);
i=0;
ATTRIBUTE_LIST(b,l,i);ENSURE_INDEX_VALID_R;
START_OF_ATTR(b,l,i);ENSURE_INDEX_VALID_R;
while( i != -2 ) {
READ_ATTR_TO_HASH(b,l,i,r);ENSURE_INDEX_VALID_R;
NEXT_ATTR(b,l,i);ENSURE_INDEX_VALID_R;
}
*out_r = r;
return SUCCESS;
}