| | |
| | | |
| | | #include "scpi/config.h" |
| | | #include "scpi/parser.h" |
| | | #include "utils.h" |
| | | #include "scpi/utils_private.h" |
| | | #include "scpi/error.h" |
| | | #include "scpi/constants.h" |
| | | |
| | | |
| | | static size_t cmdTerminatorPos(const char * cmd, size_t len); |
| | | static size_t cmdlineSeparatorPos(const char * cmd, size_t len); |
| | | static const char * cmdlineSeparator(const char * cmd, size_t len); |
| | | static const char * cmdlineTerminator(const char * cmd, size_t len); |
| | | static const char * cmdlineNext(const char * cmd, size_t len); |
| | | static size_t skipCmdLine(const char * cmd, size_t len); |
| | | |
| | | static void paramSkipBytes(scpi_t * context, size_t num); |
| | | static void paramSkipWhitespace(scpi_t * context); |
| | | static bool_t paramNext(scpi_t * context, bool_t mandatory); |
| | | static scpi_bool_t paramNext(scpi_t * context, scpi_bool_t mandatory); |
| | | |
| | | /* |
| | | int _strnicmp(const char* s1, const char* s2, size_t len) { |
| | |
| | | * Find next part of command |
| | | * @param cmd - input command |
| | | * @param len - max search length |
| | | * @return Pointer to next part of command |
| | | * @return number of characters to be skipped |
| | | */ |
| | | const char * cmdlineNext(const char * cmd, size_t len) { |
| | | size_t skipCmdLine(const char * cmd, size_t len) { |
| | | const char * separator = cmdlineSeparator(cmd, len); |
| | | if (separator == NULL) { |
| | | return cmd + len; |
| | | return len; |
| | | } else { |
| | | return separator + 1; |
| | | return separator + 1 - cmd; |
| | | } |
| | | } |
| | | |
| | |
| | | * @param context |
| | | * @result TRUE if context->paramlist is filled with correct values |
| | | */ |
| | | static bool_t findCommand(scpi_t * context, const char * cmdline_ptr, size_t cmdline_len, size_t cmd_len) { |
| | | static scpi_bool_t findCommand(scpi_t * context, const char * cmdline_ptr, size_t cmdline_len, size_t cmd_len) { |
| | | int32_t i; |
| | | const scpi_command_t * cmd; |
| | | |
| | |
| | | context->paramlist.cmd = cmd; |
| | | context->paramlist.parameters = cmdline_ptr + cmd_len; |
| | | context->paramlist.length = cmdline_len - cmd_len; |
| | | context->paramlist.cmd_raw.data = cmdline_ptr; |
| | | context->paramlist.cmd_raw.length = cmd_len; |
| | | context->paramlist.cmd_raw.position = 0; |
| | | return TRUE; |
| | | } |
| | | } |
| | |
| | | * @param len - command line length |
| | | * @return 1 if the last evaluated command was found |
| | | */ |
| | | int SCPI_Parse(scpi_t * context, const char * data, size_t len) { |
| | | int SCPI_Parse(scpi_t * context, char * data, size_t len) { |
| | | int result = 0; |
| | | const char * cmdline_end = data + len; |
| | | const char * cmdline_ptr = data; |
| | | char * cmdline_ptr = data; |
| | | size_t cmd_len; |
| | | size_t cmdline_len; |
| | | char * cmdline_ptr_prev = NULL; |
| | | size_t cmd_len_prev = 0; |
| | | |
| | | if (context == NULL) { |
| | | return -1; |
| | |
| | | while (cmdline_ptr < cmdline_end) { |
| | | result = 0; |
| | | cmd_len = cmdTerminatorPos(cmdline_ptr, cmdline_end - cmdline_ptr); |
| | | cmdline_len = cmdlineSeparatorPos(cmdline_ptr, cmdline_end - cmdline_ptr); |
| | | if (cmd_len > 0) { |
| | | composeCompoundCommand(cmdline_ptr_prev, cmd_len_prev, |
| | | &cmdline_ptr, &cmd_len); |
| | | cmdline_len = cmdlineSeparatorPos(cmdline_ptr, cmdline_end - cmdline_ptr); |
| | | if(findCommand(context, cmdline_ptr, cmdline_len, cmd_len)) { |
| | | processCommand(context); |
| | | result = 1; |
| | | cmdline_ptr_prev = cmdline_ptr; |
| | | cmd_len_prev = cmd_len; |
| | | } else { |
| | | SCPI_ErrorPush(context, SCPI_ERROR_UNDEFINED_HEADER); |
| | | } |
| | | } |
| | | cmdline_ptr = cmdlineNext(cmdline_ptr, cmdline_end - cmdline_ptr); |
| | | cmdline_ptr += skipCmdLine(cmdline_ptr, cmdline_end - cmdline_ptr); |
| | | cmdline_ptr += skipWhitespace(cmdline_ptr, cmdline_end - cmdline_ptr); |
| | | } |
| | | return result; |
| | |
| | | * @param interface |
| | | */ |
| | | void SCPI_Init(scpi_t * context) { |
| | | if (context->idn[0] == NULL) { |
| | | context->idn[0] = SCPI_DEFAULT_1_MANUFACTURE; |
| | | } |
| | | if (context->idn[1] == NULL) { |
| | | context->idn[1] = SCPI_DEFAULT_2_MODEL; |
| | | } |
| | | if (context->idn[2] == NULL) { |
| | | context->idn[2] = SCPI_DEFAULT_3; |
| | | } |
| | | if (context->idn[3] == NULL) { |
| | | context->idn[3] = SCPI_DEFAULT_4_REVISION; |
| | | } |
| | | |
| | | context->buffer.position = 0; |
| | | SCPI_ErrorInit(context); |
| | | } |
| | |
| | | |
| | | ws = skipWhitespace(context->buffer.data, context->buffer.position); |
| | | cmd_term = cmdlineTerminator(context->buffer.data + ws, context->buffer.position - ws); |
| | | if (cmd_term != NULL) { |
| | | while (cmd_term != NULL) { |
| | | int curr_len = cmd_term - context->buffer.data; |
| | | result = SCPI_Parse(context, context->buffer.data + ws, curr_len - ws); |
| | | memmove(context->buffer.data, cmd_term, context->buffer.position - curr_len); |
| | | context->buffer.position -= curr_len; |
| | | |
| | | ws = skipWhitespace(context->buffer.data, context->buffer.position); |
| | | cmd_term = cmdlineTerminator(context->buffer.data + ws, context->buffer.position - ws); |
| | | } |
| | | } |
| | | |
| | |
| | | * @param val |
| | | * @return |
| | | */ |
| | | size_t SCPI_ResultBool(scpi_t * context, bool_t val) { |
| | | size_t SCPI_ResultBool(scpi_t * context, scpi_bool_t val) { |
| | | return SCPI_ResultInt(context, val ? 1 : 0); |
| | | } |
| | | |
| | |
| | | * @param mandatory |
| | | * @return |
| | | */ |
| | | bool_t paramNext(scpi_t * context, bool_t mandatory) { |
| | | scpi_bool_t paramNext(scpi_t * context, scpi_bool_t mandatory) { |
| | | paramSkipWhitespace(context); |
| | | if (context->paramlist.length == 0) { |
| | | if (mandatory) { |
| | |
| | | * @param mandatory |
| | | * @return |
| | | */ |
| | | bool_t SCPI_ParamInt(scpi_t * context, int32_t * value, bool_t mandatory) { |
| | | scpi_bool_t SCPI_ParamInt(scpi_t * context, int32_t * value, scpi_bool_t mandatory) { |
| | | const char * param; |
| | | size_t param_len; |
| | | size_t num_len; |
| | |
| | | * @param mandatory |
| | | * @return |
| | | */ |
| | | bool_t SCPI_ParamDouble(scpi_t * context, double * value, bool_t mandatory) { |
| | | scpi_bool_t SCPI_ParamDouble(scpi_t * context, double * value, scpi_bool_t mandatory) { |
| | | const char * param; |
| | | size_t param_len; |
| | | size_t num_len; |
| | |
| | | * @param mandatory |
| | | * @return |
| | | */ |
| | | bool_t SCPI_ParamString(scpi_t * context, const char ** value, size_t * len, bool_t mandatory) { |
| | | scpi_bool_t SCPI_ParamString(scpi_t * context, const char ** value, size_t * len, scpi_bool_t mandatory) { |
| | | size_t length; |
| | | |
| | | if (!value || !len) { |
| | |
| | | * @param mandatory |
| | | * @return |
| | | */ |
| | | bool_t SCPI_ParamText(scpi_t * context, const char ** value, size_t * len, bool_t mandatory) { |
| | | scpi_bool_t SCPI_ParamText(scpi_t * context, const char ** value, size_t * len, scpi_bool_t mandatory) { |
| | | size_t length; |
| | | |
| | | if (!value || !len) { |
| | |
| | | * @param mandatory |
| | | * @return |
| | | */ |
| | | bool_t SCPI_ParamBool(scpi_t * context, bool_t * value, bool_t mandatory) { |
| | | scpi_bool_t SCPI_ParamBool(scpi_t * context, scpi_bool_t * value, scpi_bool_t mandatory) { |
| | | const char * param; |
| | | size_t param_len; |
| | | size_t num_len; |
| | |
| | | * @param mandatory |
| | | * @return |
| | | */ |
| | | bool_t SCPI_ParamChoice(scpi_t * context, const char * options[], size_t * value, bool_t mandatory) { |
| | | scpi_bool_t SCPI_ParamChoice(scpi_t * context, const char * options[], int32_t * value, scpi_bool_t mandatory) { |
| | | const char * param; |
| | | size_t param_len; |
| | | size_t res; |
| | |
| | | return FALSE; |
| | | } |
| | | |
| | | for (res = 0; options[res]; ++res) { |
| | | if (matchPattern(options[res], strlen(options[res]), param, param_len)) { |
| | | *value = res; |
| | | return TRUE; |
| | | } |
| | | for (res = 0; options[res]; ++res) { |
| | | if (matchPattern(options[res], strlen(options[res]), param, param_len)) { |
| | | *value = res; |
| | | return TRUE; |
| | | } |
| | | } |
| | | |
| | | SCPI_ErrorPush(context, SCPI_ERROR_ILLEGAL_PARAMETER_VALUE); |
| | | SCPI_ErrorPush(context, SCPI_ERROR_ILLEGAL_PARAMETER_VALUE); |
| | | return FALSE; |
| | | } |
| | | |