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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <stdbool.h>
  4. #include <string.h>
  5. #include <ctype.h>
  6.  
  7. #define MAX_TOKSIZE	(8+1)			// "SEQUENCE"
  8. #define MAX_PARAMS	4
  9. #define MAX_CSSTRSIZE	(15+1)
  10.  
  11. #define MAX_STOKENS	5
  12. #define MAX_MTOKENS	6
  13. #define MAX_ETOKENS	7
  14.  
  15. /**
  16.  *  Command codes as returned by the parser when a given command is identified
  17.  */
  18. typedef enum CommandSet {
  19.         csUnknown	= 0,
  20.         csSceneGo	= 1,			// SCENE*GO
  21.         csSceneTGo	= 2,			// SCENE*T*GO
  22.         csSceneTLGo	= 3,			// SCENE*T*L*GO
  23.         csSceneNu	= 4,			// SCENE*NU
  24.         csSceneNd	= 5,			// SCENE*ND
  25.         csSceneUp	= 6,			// SCENE*UP
  26.         csSceneDn	= 7,			// SCENE*DN
  27.         csSceneSt	= 8,			// SCENE*ST
  28.         csSequenceGo	= 9,			// SEQUENCE*GO
  29.         csSequenceSt	= 10,			// SEQUENCE*ST
  30.         csSetSlaveChan	= 11,			// S*C*L*GO
  31.         csSetPackChan	= 12,			// P*C*L*GO
  32.         csSetPackDmx	= 13,			// P*D*L*GO
  33.         csSetModuleChan	= 14,			// M*D*C*L*GO
  34.         csSetButtonState = 15			// P*B*S*\r\n, P*B*S*GO
  35.  
  36. } CommandSet_t;
  37.  
  38. typedef struct ResType {
  39. 	CommandSet_t	cs;
  40. 	int		params[ MAX_PARAMS ];
  41. } ResType;
  42.  
  43. /* -------------------------------------------------------
  44.  *
  45.  * -------------------------------------------------------
  46.  */
  47. bool str_in_arrstr( const char *str, char *const *arrstr, const int arrlen )
  48. {
  49. 	register int i = 0;
  50. 	if ( !str || !arrstr )
  51. 		return false;
  52.  
  53. 	for (i=0; i < arrlen; i++)
  54. 		if ( !strcmp(str, arrstr[i]) )
  55. 			return true;
  56. 	return false;
  57. }
  58.  
  59. /* -------------------------------------------------------
  60.  *
  61.  * -------------------------------------------------------
  62.  */
  63. int advance_param( char *start, char *token )
  64. {
  65. 	int i = 0;
  66.  
  67. 	if ( !start || !token )
  68. 		return 0;
  69.  
  70. 	while ( *start && *start != ',' && isdigit( *start ) && i < MAX_TOKSIZE )
  71. 	{
  72. 		*token++ = *start++;
  73. 		i++;
  74. 	}
  75. 	*token = 0;
  76.  
  77. 	return i;
  78. }
  79.  
  80. /* -------------------------------------------------------
  81.  *
  82.  * -------------------------------------------------------
  83.  */
  84. int advance_token( char *start, char *token, char *csp )
  85. {
  86. 	int i = 0;
  87.  
  88. 	if ( !start || !token )
  89. 		return 0;
  90.  
  91. 	while ( *start && *start != ',' && !isdigit( *start ) && i < MAX_TOKSIZE )
  92. 	{
  93. 		*token++ = *csp++ = *start++;
  94. 		i++;
  95. 	}
  96. 	*token = 0;
  97.  
  98. 	return i;
  99. }
  100.  
  101. /* -------------------------------------------------------
  102.  *
  103.  * -------------------------------------------------------
  104.  */
  105. ResType getResult( const char *atstart, const int maxlen )
  106. {
  107. 	ResType ret = { csUnknown, {0} };
  108. 	char	*stokens[ MAX_STOKENS ] = {"M", "P", "S", "START", "SEQUENCE"};
  109. 	char	*mtokens[ MAX_MTOKENS ] = {"B", "C", "D", "L", "X", "T"};
  110. 	char	*etokens[ MAX_ETOKENS ] = {"GO", "DN", "UP", "NU", "ND", "ST", "\r\n"};
  111. 	char	token[ MAX_TOKSIZE ]    = {'\0'};
  112. 	char	csstr[ MAX_CSSTRSIZE ]  = {'\0'};
  113. 	int	i=0, j=0;
  114. 	char	*cp = NULL, *csp = NULL;
  115. 	bool	started = false, isstok = false, ismtok = false, isetok = false;
  116. 	int	iparam = 0;
  117.  
  118. 	if ( !atstart || maxlen < 1 )
  119. 		goto ret_unknown;
  120.  
  121. 	cp = (char *)atstart;
  122. 	csp = csstr;
  123. 	started = false;
  124. 	i = j = iparam = 0;
  125. 	while ( i < maxlen && *cp != ',' )
  126. 	{
  127. 		/*
  128. 		 * start reading the token
  129. 		 */
  130.  
  131. 		j = advance_token( cp, token, csp ); 
  132. 		if ( j == 0 ) {
  133. 			puts("*** error: garbage found or invalid pointer used");
  134. 			goto ret_unknown;       /* invalid token */
  135. 		}
  136.  
  137. 		isetok = str_in_arrstr(token, etokens, MAX_ETOKENS);
  138. 		if ( isetok )
  139. 		{
  140. 			if ( !started ) {
  141. 				puts("*** error: end of command that never started");
  142. 				goto ret_unknown;
  143. 			}
  144. 			printf( "\ntoken = %s\n", token );
  145. 			printf( "csstr = %s\n", csstr);
  146. 			return ret;
  147. 		}
  148.  
  149. 		ismtok = str_in_arrstr(token, mtokens, MAX_MTOKENS);
  150. 		if ( ismtok )
  151. 		{
  152. 			if ( !started ) {
  153. 				puts("*** error: mid of command that never started");
  154. 				goto ret_unknown;
  155. 			}
  156. 		}
  157. 		else
  158. 		{
  159. 			isstok = str_in_arrstr(token, stokens, MAX_STOKENS);
  160. 			if ( started && isstok ) {
  161. 				puts("*** error: invalid command (started twice)");
  162. 				goto ret_unknown;
  163. 			}
  164.  
  165. 			if ( !started && isstok )
  166. 				started = true;
  167. 			else if ( !isstok ) {
  168. 				puts("*** error: invalid token found");
  169. 				goto ret_unknown;
  170. 			}
  171. 		}
  172.  
  173. 		printf( "\ntoken = %s\n", token );
  174.  
  175. 		cp += j;
  176. 		csp += j;
  177. 		i += j;
  178.  
  179. 		/*
  180. 		 * start reading the token's parameter
  181. 		 */
  182.  
  183. 		j = advance_param( cp, token );
  184. 		if ( j == 0 ) {
  185. 			puts("*** error: invalid parameter or invalid pointer");
  186. 			goto ret_unknown;       /* invalid parameter */
  187. 		}
  188.  
  189. 		ret.params[ iparam ] = atoi( token );
  190. 		printf( "param[ %d ] = %d\n", iparam, ret.params[ iparam ] );
  191. 		iparam++;
  192.  
  193. 		cp += j;
  194. 		i += j;
  195.  
  196. 		*csp++ = '*';
  197. 		printf( "csstr = %s\n", csstr );
  198.  
  199. 	 }
  200.  
  201. 	/* ret.cs = hashmap[ csstr ] */
  202. 	return ret;
  203.  
  204. ret_unknown:
  205.  
  206. 	ret.cs = csUnknown;
  207. 	return ret;
  208. }
  209.  
  210. /* -------------------------------------------------------
  211.  *
  212.  * -------------------------------------------------------
  213.  */
  214.  
  215. int main( void )
  216. {
  217. 	char *inputdata         = "S2C34L871GO,S32C89L100GO,S923C49L510GO";
  218. //	char *inputdata         = "S2C34L871GO";
  219. 	int inputlen            = strlen( inputdata );
  220.  
  221. 	printf( "input   : %s\n", inputdata );
  222. 	printf( "inputlen: %d\n", inputlen );
  223. 	getResult( inputdata, inputlen );
  224.  
  225. 	exit( EXIT_SUCCESS );
  226. }
  227.  
Success #stdin #stdout 0.01s 1720KB
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stdin
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Standard input is empty
stdout
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input   : S2C34L871GO,S32C89L100GO,S923C49L510GO
inputlen: 38

token = S
param[ 0 ] = 2
csstr = S*

token = C
param[ 1 ] = 34
csstr = S*C*

token = L
param[ 2 ] = 871
csstr = S*C*L*

token = GO
csstr = S*C*L*GO
https://ideone.com/FEymW
language:
C (gcc 8.3)
created:
13 years ago
visibility:
public

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