53 lines
1.8 KiB
C
53 lines
1.8 KiB
C
/*****************************************************************************
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ExeSCl()
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This function executes a semi-colon (;) command.
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; Exit iteration on search failure
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n; Exit iteration if n is positive
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:; Exit iteration on search success
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n:; Exit iteration if n is negative
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*****************************************************************************/
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#include "zport.h" /* define portability identifiers */
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#include "tecoc.h" /* define general identifiers */
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#include "defext.h" /* define external global variables */
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#include "deferr.h" /* define identifiers for error messages */
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DEFAULT ExeSCl() /* execute semi-colon command */
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{
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#if DEBUGGING
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static char *DbgFNm = "ExeSCl";
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DbgFEn(1,DbgFNm,
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(CmdMod & COLON)
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? (EStTop == EStBot) ? "have :;" : "have n:;"
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: (EStTop == EStBot) ? "have ;" : "have n;" );
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#endif
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if (LStTop == LStBot) { /* if not in a loop */
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ErrMsg(ERR_SNI); /* ; not in iteration */
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DBGFEX(1,DbgFNm,"FAILURE");
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return FAILURE;
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}
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if (EStTop == EStBot) { /* if no numeric argument */
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ErrMsg(ERR_NAS); /* no argument before ; */
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DBGFEX(1,DbgFNm,"FAILURE");
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return FAILURE;
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}
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if (GetNmA() == FAILURE) { /* get numeric argument */
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DBGFEX(1,DbgFNm,"FAILURE. GetNmA failed()");
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return FAILURE;
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}
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/*
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* If not colon-modified and numeric arg is positive OR
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* if colon-modified and numeric arg is negative
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* flow to the end of the loop and exit it
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*/
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if ( (!(CmdMod & COLON) && (NArgmt >= 0) ) ||
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( (CmdMod & COLON) && (NArgmt < 0) ) ) {
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if (FlowEL() == FAILURE) { /* flow to end of loop */
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DBGFEX(1,DbgFNm,"FAILURE, FlowEL() failed");
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return FAILURE;
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}
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}
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CmdMod = '\0'; /* clear modifiers flags */
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EStTop = EStBot; /* clear expression stack */
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DBGFEX(1,DbgFNm,"SUCCESS");
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return SUCCESS;
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}
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