diff options
Diffstat (limited to 'backends/libmmbackend.c')
-rw-r--r-- | backends/libmmbackend.c | 241 |
1 files changed, 227 insertions, 14 deletions
diff --git a/backends/libmmbackend.c b/backends/libmmbackend.c index c98cfe3..ccbeb52 100644 --- a/backends/libmmbackend.c +++ b/backends/libmmbackend.c @@ -208,10 +208,11 @@ size_t json_validate(char* json, size_t length){ size_t json_validate_string(char* json, size_t length){ size_t string_length = 0, offset; - for(offset = 0; json[offset] && offset < length && json[offset] != '"'; offset++){ + //skip leading whitespace + for(offset = 0; json[offset] && offset < length && isspace(json[offset]); offset++){ } - if(offset == length){ + if(offset == length || json[offset] != '"'){ return 0; } @@ -230,17 +231,122 @@ size_t json_validate_string(char* json, size_t length){ } size_t json_validate_array(char* json, size_t length){ - //TODO + size_t offset = 0; + + //skip leading whitespace + for(offset = 0; json[offset] && offset < length && isspace(json[offset]); offset++){ + } + + if(offset == length || json[offset] != '['){ + return 0; + } + + for(offset++; offset < length; offset++){ + offset += json_validate(json + offset, length - offset); + + //skip trailing whitespace, find terminator + for(; offset < length && isspace(json[offset]); offset++){ + } + + if(json[offset] == ','){ + continue; + } + + if(json[offset] == ']'){ + return offset + 1; + } + + break; + } + return 0; } size_t json_validate_object(char* json, size_t length){ - //TODO + size_t offset = 0; + + //skip whitespace + for(offset = 0; json[offset] && isspace(json[offset]); offset++){ + } + + if(offset == length || json[offset] != '{'){ + return 0; + } + + for(offset++; offset < length; offset++){ + if(json_identify(json + offset, length - offset) != JSON_STRING){ + //still could be an empty object... + for(; offset < length && isspace(json[offset]); offset++){ + } + if(json[offset] == '}'){ + return offset + 1; + } + return 0; + } + offset += json_validate(json + offset, length - offset); + + //find value separator + for(; offset < length && isspace(json[offset]); offset++){ + } + + if(json[offset] != ':'){ + return 0; + } + + offset++; + offset += json_validate(json + offset, length - offset); + + //skip trailing whitespace + for(; json[offset] && isspace(json[offset]); offset++){ + } + + if(json[offset] == '}'){ + return offset + 1; + } + else if(json[offset] != ','){ + return 0; + } + } return 0; } size_t json_validate_value(char* json, size_t length){ - //TODO + size_t offset = 0, value_length; + + //skip leading whitespace + for(offset = 0; json[offset] && offset < length && isspace(json[offset]); offset++){ + } + + if(offset == length){ + return 0; + } + + //match complete values + if(length - offset >= 4 && !strncmp(json + offset, "null", 4)){ + return offset + 4; + } + else if(length - offset >= 4 && !strncmp(json + offset, "true", 4)){ + return offset + 4; + } + else if(length - offset >= 5 && !strncmp(json + offset, "false", 5)){ + return offset + 5; + } + + if(json[offset] == '-' || isdigit(json[offset])){ + //json number parsing is dumb. + for(value_length = 1; offset + value_length < length && + (isdigit(json[offset + value_length]) + || json[offset + value_length] == '+' + || json[offset + value_length] == '-' + || json[offset + value_length] == '.' + || tolower(json[offset + value_length]) == 'e'); value_length++){ + } + + if(value_length > 0){ + return offset + value_length; + } + } + return 0; } @@ -284,13 +390,51 @@ size_t json_obj_offset(char* json, char* key){ //add length of value offset += json_validate(json + offset, strlen(json + offset)); - //find comma or closing brace - for(; json[offset] && json[offset] != ',' && json[offset] != '}'; offset++){ + //skip trailing whitespace + for(; json[offset] && isspace(json[offset]); offset++){ } if(json[offset] == ','){ offset++; + continue; + } + + break; + } + + return 0; +} + +size_t json_array_offset(char* json, uint64_t key){ + size_t offset = 0, index = 0; + + //skip leading whitespace + for(offset = 0; json[offset] && isspace(json[offset]); offset++){ + } + + if(json[offset] != '['){ + return 0; + } + + for(offset++; index <= key; offset++){ + //skip whitespace + for(; json[offset] && isspace(json[offset]); offset++){ + } + + if(index == key){ + return offset; + } + + offset += json_validate(json + offset, strlen(json + offset)); + + //skip trailing whitespace, find terminator + for(; json[offset] && isspace(json[offset]); offset++){ } + + if(json[offset] != ','){ + break; + } + index++; } return 0; @@ -304,6 +448,14 @@ json_type json_obj(char* json, char* key){ return JSON_INVALID; } +json_type json_array(char* json, uint64_t key){ + size_t offset = json_array_offset(json, key); + if(offset){ + return json_identify(json + offset, strlen(json + offset)); + } + return JSON_INVALID; +} + uint8_t json_obj_bool(char* json, char* key, uint8_t fallback){ size_t offset = json_obj_offset(json, key); if(offset){ @@ -317,6 +469,19 @@ uint8_t json_obj_bool(char* json, char* key, uint8_t fallback){ return fallback; } +uint8_t json_array_bool(char* json, uint64_t key, uint8_t fallback){ + size_t offset = json_array_offset(json, key); + if(offset){ + if(!strncmp(json + offset, "true", 4)){ + return 1; + } + if(!strncmp(json + offset, "false", 5)){ + return 0; + } + } + return fallback; +} + int64_t json_obj_int(char* json, char* key, int64_t fallback){ char* next_token = NULL; int64_t result; @@ -332,7 +497,7 @@ int64_t json_obj_int(char* json, char* key, int64_t fallback){ double json_obj_double(char* json, char* key, double fallback){ char* next_token = NULL; - int64_t result; + double result; size_t offset = json_obj_offset(json, key); if(offset){ result = strtod(json + offset, &next_token); @@ -343,6 +508,32 @@ double json_obj_double(char* json, char* key, double fallback){ return fallback; } +int64_t json_array_int(char* json, uint64_t key, int64_t fallback){ + char* next_token = NULL; + int64_t result; + size_t offset = json_array_offset(json, key); + if(offset){ + result = strtol(json + offset, &next_token, 10); + if(next_token != json + offset){ + return result; + } + } + return fallback; +} + +double json_array_double(char* json, uint64_t key, double fallback){ + char* next_token = NULL; + double result; + size_t offset = json_array_offset(json, key); + if(offset){ + result = strtod(json + offset, &next_token); + if(next_token != json + offset){ + return result; + } + } + return fallback; +} + char* json_obj_str(char* json, char* key, size_t* length){ size_t offset = json_obj_offset(json, key), raw_length; if(offset){ @@ -356,15 +547,37 @@ char* json_obj_str(char* json, char* key, size_t* length){ } char* json_obj_strdup(char* json, char* key){ - size_t offset = json_obj_offset(json, key), raw_length; - char* rv = NULL; + size_t len = 0; + char* value = json_obj_str(json, key, &len), *rv = NULL; + if(len){ + rv = calloc(len + 1, sizeof(char)); + if(rv){ + memcpy(rv, value, len); + } + } + return rv; +} + +char* json_array_str(char* json, uint64_t key, size_t* length){ + size_t offset = json_array_offset(json, key), raw_length; if(offset){ raw_length = json_validate_string(json + offset, strlen(json + offset)); - rv = calloc(raw_length - 1, sizeof(char)); - if(rv){ - memcpy(rv, json + offset + 1, raw_length - 2); + if(length){ + *length = raw_length - 2; } - return rv; + return json + offset + 1; } return NULL; } + +char* json_array_strdup(char* json, uint64_t key){ + size_t len = 0; + char* value = json_array_str(json, key, &len), *rv = NULL; + if(len){ + rv = calloc(len + 1, sizeof(char)); + if(rv){ + memcpy(rv, value, len); + } + } + return rv; +} |