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Diffstat (limited to 'dmake/getinp.c')
| -rw-r--r-- | dmake/getinp.c | 854 |
1 files changed, 0 insertions, 854 deletions
diff --git a/dmake/getinp.c b/dmake/getinp.c deleted file mode 100644 index 033374e4c..000000000 --- a/dmake/getinp.c +++ /dev/null @@ -1,854 +0,0 @@ -/* RCS $Id: getinp.c,v 1.10 2007-10-15 15:39:23 ihi Exp $ --- --- SYNOPSIS --- Handle reading of input. --- --- DESCRIPTION --- The code in this file reads the input from the specified stream --- into the provided buffer of size Buffer_size. In doing so it deletes --- comments. Comments are delimited by the #, and --- <nl> character sequences. An exception is \# which --- is replaced by # in the input. Line continuations are signalled --- at the end of a line and are recognized inside comments. --- The line continuation is always <\><nl>. --- --- If the file to read is NIL(FILE) then the Get_line routine returns the --- next rule from the builtin rule table (Rule_tab from ruletab.c) if --- there is one. --- --- AUTHOR --- Dennis Vadura, dvadura@dmake.wticorp.com --- --- WWW --- http://dmake.wticorp.com/ --- --- COPYRIGHT --- Copyright (c) 1996,1997 by WTI Corp. All rights reserved. --- --- This program is NOT free software; you can redistribute it and/or --- modify it under the terms of the Software License Agreement Provided --- in the file <distribution-root>/readme/license.txt. --- --- LOG --- Use cvs log to obtain detailed change logs. -*/ - -#include "extern.h" - -#define IS_WHITE(A) ((A == ' ') || (A == '\t') || (A == '\n') || (A == '\r')) -#define SCAN_WHITE(A) \ - while( IS_WHITE(*A) ) A++; - -static int _is_conditional ANSI((char*)); -static int _handle_conditional ANSI((int, TKSTRPTR)); - -static int rule_ind = 0; /* index of rule when reading Rule_tab */ -static int skip = FALSE; /* if true the skip input */ - -int partcomp( char* lhs, int opcode ); -int parse_complex_expression( char *expr, char **expr_end, int opcode ); - - -PUBLIC int -Get_line( buf, fil )/* -====================== - Read a line of input from the file stripping off comments. The routine - returns TRUE if EOF. If fil equals NIL(FILE) then the next line from - *Rule_tab[] is used. Rule_tab is either the buildin rule table or points - to the current environment (used by ReadEnvironment()). - The function returns TRUE if the input file/buffer was read to the end - and FALSE otherwise. */ -char *buf; -FILE *fil; -{ - extern char **Rule_tab; - register char *p; - register char *c; - char *q; - char *buf_org; - static int ignore = FALSE; - int cont = FALSE; - int pos = 0; - int res = 0; - register char *tmp = NIL(char); - - DB_ENTER( "Get_line" ); - - if( Skip_to_eof ) { - Skip_to_eof = FALSE; - rule_ind = 0; - - if( Verbose & V_MAKE ) - Warning("Ignoring remainder of file %s", Filename()); - - DB_RETURN(TRUE); - } - - if( fil == NIL(FILE) ) { - /* Reading the internal rule table. Set rule_ind to zero after the - * last entry so that ReadEnvironment() works as expected every time. */ - - while( (p = Rule_tab[ rule_ind++ ]) != NIL(char) ) { - /* The last test in this if *p != '~', handles the environment - * passing conventions used by MKS to pass arguments. We want to - * skip those environment entries. Also CYGWIN likes to export '!' - * prefixed environment variables that cause severe pain, axe them too. - * And finally it is possible to do "env 'GGG HHH'='some value' bash" - * which causes that there are env variables with spaces in the name - * defined which causes dmake to malfunction too */ - char *equal = strchr(p,'='); - char *space = strchr(p,' '); - if( !Readenv || (Readenv && (equal != NIL(char)) && (space == NIL(char) || space > equal) && *p!='~' && *p!='!')){ - strcpy( buf, p ); - - DB_PRINT( "io", ("Returning [%s]", buf) ); - DB_RETURN( FALSE ); - } - } - - rule_ind = 0; - - DB_PRINT( "io", ("Done Ruletab") ); - DB_RETURN( TRUE ); - } - - buf_org = buf; - -do_again: - do { - p = buf+pos; - /* fgets() reads at most one less than Buffer_size-pos characters. */ - if(feof( fil ) || (fgets( p, Buffer_size-pos, fil ) == NIL(char))) - DB_RETURN( TRUE ); - -#ifdef _MPW - if ( p[0] == 10 && p[1] == COMMENT_CHAR) - p[0] = ' '; -#endif - - Line_number++; - - /* Set q to the last char in p before the \n\0. */ - q = p+strlen(p)-2; - if( q >= p ) { /* Only check for special cases if p points - * to a non-empty line. */ - - /* ignore each RETURN at the end of a line before any further - * processing */ - if( q[0] == '\r' && q[1] == '\n' ) { - q[0] = '\n'; - q[1] = '\0'; - q--; - } - /* you also have to deal with END_OF_FILE chars to process raw - * DOS-Files. Normally they are the last chars in file, but after - * working on these file with vi, there is an additional NEWLINE - * after the last END_OF_FILE. So if the second last char in the - * actual line is END_OF_FILE, you can skip the last char. Then - * you can search the line back until you find no more END_OF_FILE - * and nuke each you found by string termination. */ - if( q[0] == '\032' ) - q--; - while( q[1] == '\032' ) { - q[1] = '\0'; - q--; - } - - /* ignore input if ignore flag set and line ends in a continuation - character. */ - - if( ignore ) { - if( q[0] != CONTINUATION_CHAR || q[1] != '\n' ) ignore = FALSE; - *p = '\0'; - continue; - } - - /* If a comment is found the line does not end in \n anymore. */ - c = Do_comment(p, &q, Group || (*buf == '\t') || (Notabs && *buf ==' ')); - - /* Does the end of the line end in a continuation sequence? */ - - if( (q[0] == CONTINUATION_CHAR) && (q[1] == '\n')) { - /* If the continuation was at the end of a comment then ignore the - * next input line, (or lines until we get one ending in just <nl>) - * else it's a continuation, so build the input line from several - * text lines on input. The maximum size of this is governened by - * Buffer_size */ - if( q != p && q[-1] == CONTINUATION_CHAR ) { - size_t len = strlen(q+1)+1; - memmove( q, q+1, len ); - q--; - cont = FALSE; - } - else if( c != NIL(char) ) - ignore = TRUE; - else - cont = TRUE; /* Keep the \<nl>. */ - } - else { - cont = FALSE; - } - - q = ( c == NIL(char) ) ? q+2 : c; - } - else { /* empty line or "" */ - cont = FALSE; - ignore = FALSE; - q = p+strlen(p); /* strlen(p) is 1 or 0 */ - } - - pos += q-p; - } - while( (cont || !*buf) && (pos < Buffer_size-1) ); - - if( pos >= Buffer_size-1 ) - Fatal( "Input line too long, increase MAXLINELENGTH" ); - - /* Lines that had comments don't contain \n anymore. */ - /* ??? Continued lines that are followed by an empty or comment only - * line will end in \<nl>. */ - if( (q > p) && (buf[ pos-1 ] == '\n') ) - buf[ --pos ] = '\0'; /* Remove the final \n. */ - - /* STUPID AUGMAKE uses "include" at the start of a line as - * a signal to include a new file, so let's look for it. - * if we see it replace it by .INCLUDE: and stick this back - * into the buffer. We also allow GNU make if[n]eq/else/endif. - * - * These substitutions are made only if we are not parsing a group - * recipe. */ - if( (p = DmStrSpn(buf, " \t\r\n")) == NIL(char) ) - p = buf; - - if (!Group) { - if( !strncmp( "include", p, 7 ) && - (p[7] == ' ' || p[7] == '\t') ) - tmp = DmStrJoin( ".INCLUDE:", p+7, -1, FALSE ); - else if( !strncmp( "ifeq", p, 4 ) && - (p[4] == ' ' || p[4] == '\t') ) - tmp = DmStrJoin( ".IFEQ", p+4, -1, FALSE ); - else if( !strncmp( "ifneq", p, 5 ) && - (p[5] == ' ' || p[5] == '\t') ) - tmp = DmStrJoin( ".IFNEQ", p+5, -1, FALSE ); - else if( !strncmp( "elif", p, 4 ) && - (p[4] == ' ' || p[4] == '\t') ) - tmp = DmStrJoin( ".ELIF", p+4, -1, FALSE ); - else if( !strncmp( "else", p, 4 ) && - (p[4] == ' ' || p[4] == '\t' || p[4] == '\0') ) - tmp = DmStrJoin( ".ELSE", p+4, -1, FALSE ); - else if( !strncmp( "endif", p, 5 ) && - (p[5] == ' ' || p[5] == '\t' || p[5] == '\0') ) - tmp = DmStrJoin( ".END", p+5, -1, FALSE ); - } - - if( tmp != NIL(char)) { - strcpy( buf, tmp ); - FREE( tmp ); - tmp = NIL(char); - } - - /* Now that we have the next line of input to make, we should check to - * see if it is a conditional expression. If it is then process it, - * otherwise pass it on to the parser. */ - - if( *(p = DmStrSpn(buf, " \t\r\n")) == CONDSTART ) { - TKSTR token; - - SET_TOKEN( &token, p ); - - p = Get_token( &token, "", FALSE ); - - if( (res = _is_conditional(p)) != 0 ) /* ignore non-control special */ - { /* targets */ - res = _handle_conditional( res, &token ); - skip = TRUE; - } - else { - CLEAR_TOKEN( &token ); - res = TRUE; - } - } - - if( skip ) { - buf = buf_org; /* ignore line just read in */ - pos = 0; - skip = res; - goto do_again; - } - - DB_PRINT( "io", ("Returning [%s]", buf) ); - DB_RETURN( FALSE ); -} - - -PUBLIC char * -Do_comment(str, pend, keep)/* -============================= - Search the input string looking for comment chars. If it contains - comment chars then NUKE the remainder of the line, if the comment - char is preceeded by \ then shift the remainder of the line left - by one char. */ -char *str; -char **pend; -int keep; -{ - char *c = str; - - while( (c = strchr(c, COMMENT_CHAR)) != NIL(char) ) { - if( Comment || State == NORMAL_SCAN ) - if( c != str && c[-1] == ESCAPE_CHAR ) { - size_t len = strlen(c)+1; - memmove( c-1, c, len ); /* copy it left, due to \# */ - if( pend ) (*pend)--; /* shift tail pointer left */ - } - else { - /* Check/execute if shebang command is present. */ - if( !No_exec - && c == str - && c[1] == '!' - && Line_number == 1 - && Nestlevel() == 1 ) { - char *cmnd; - - cmnd = Expand(c+2); - cmnd[strlen(cmnd)-1] = '\0'; /* strip last newline */ - Current_target = Root; -#if defined(MSDOS) - Swap_on_exec = TRUE; -#endif - Wait_for_completion = TRUE; - Do_cmnd(&cmnd, FALSE, TRUE, Current_target, A_DEFAULT, TRUE); -#if defined(MSDOS) - Swap_on_exec = FALSE; -#endif - Wait_for_completion = FALSE; - FREE(cmnd); - } - - *c = '\0'; /* a true comment so break */ - break; - } - else { - if( keep ) - c = NIL(char); - else - *c = '\0'; - - break; - } - } - - return(c); -} - - -PUBLIC char * -Get_token( string, brk, anchor )/* -================================== - Return the next token in string. - - Returns empty string when no more tokens in string. - brk is a list of chars that also cause breaks in addition to space and - tab, but are themselves returned as tokens. if brk is NULL then the - remainder of the line is returned as a single token. - - 'anchor' if 1, says break on chars in the brk list, but only if - the entire token begins with the first char of the brk list, if - 0 then any char of brk will cause a break to occurr. - - If 'anchor' is 2, then break only seeing the first char in the break - list allowing only chars in the break list to form the prefix. */ - -TKSTRPTR string; -char *brk; -int anchor; -{ - register char *s; - register char *curp = 0; - register char *t; - int done = FALSE; - char space[100]; - - DB_ENTER( "Get_token" ); - - s = string->tk_str; /* Get string parameters */ - *s = string->tk_cchar; /* ... and strip leading w/s */ - - SCAN_WHITE( s ); - - DB_PRINT( "tok", ("What's left [%s]", s) ); - - if( !*s ) { - DB_PRINT( "tok", ("Returning NULL token") ); - DB_RETURN( "" ); - } - - - /* Build the space list. space contains all those chars that may possibly - * cause breaks. This includes the brk list as well as white space. */ - - if( brk != NIL(char) ) { - strcpy( space, " \t\r\n" ); - strcat( space, brk ); - } - else { - space[0] = 0xff; /* a char we know will not show up */ - space[1] = 0; - } - - - /* Handle processing of quoted tokens. Note that this is disabled if - * brk is equal to NIL */ - - while( *s == '\"' && ((brk != NIL(char)) || !string->tk_quote) ) { - s++; - if( string->tk_quote ) { - curp = s-1; - do { curp = strchr( curp+1, '\"' ); } - while( (curp != NIL(char)) && (*(curp+1) == '\"')); - - if( curp == NIL(char) ) Fatal( "Unmatched quote in token" ); - string->tk_quote = !string->tk_quote; - - /* Check for "" case, and if found ignore it */ - if( curp == s ) continue; - goto found_token; - } - else - SCAN_WHITE( s ); - - string->tk_quote = !string->tk_quote; - } - - - /* Check for a token break character at the beginning of the token. - * If found return the next set of break chars as a token. */ - - if( anchor == 2 && brk != NIL(char) ) { - curp = s; - while( *curp && (strchr(brk,*curp)!=NIL(char)) && (*curp!=*brk) ) curp++; - done = (*brk == *curp++); - } - else if( (brk != NIL(char)) && (strchr( brk, *s ) != NIL(char)) ) { - curp = DmStrSpn( s, brk ); - done = (anchor == 0) ? TRUE : - ((anchor == 1)?(*s == *brk) : (*brk == curp[-1])); - } - - - /* Scan for the next token in the list and return it less the break char - * that was used to terminate the token. It will possibly be returned in - * the next call to Get_token */ - - if( !done ) { - SCAN_WHITE( s ); - - t = s; - do { - done = TRUE; - curp = DmStrPbrk(t, space); - - if( anchor && *curp && !IS_WHITE( *curp ) ) - if( ((anchor == 1)?*curp:DmStrSpn(curp,brk)[-1]) != *brk ) { - t++; - done = FALSE; - } - } - while( !done ); - - if( (curp == s) && (strchr(brk, *curp) != NIL(char)) ) curp++; - } - -found_token: - string->tk_str = curp; - string->tk_cchar = *curp; - *curp = '\0'; - - DB_PRINT( "tok", ("Returning [%s]", s) ); - DB_RETURN( s ); -} - - -static int -_is_conditional( tg )/* -======================= - Look at tg and return it's value if it is a conditional identifier - otherwise return 0. */ -char *tg; -{ - DB_ENTER( "_is_conditional" ); - - tg++; - switch( *tg ) - { - case 'I': - if( !strcmp( tg, "IF" )) DB_RETURN( ST_IF ); - else if( !strcmp( tg, "IFEQ" )) DB_RETURN( ST_IFEQ ); - else if( !strcmp( tg, "IFNEQ" )) DB_RETURN( ST_IFNEQ ); - break; - - case 'E': - if( !strcmp( tg, "END" )) DB_RETURN( ST_END ); - else if( !strcmp( tg, "ENDIF")) DB_RETURN( ST_END ); - else if( !strcmp( tg, "ELSE" )) DB_RETURN( ST_ELSE ); - else if( !strcmp( tg, "ELIF" )) DB_RETURN( ST_ELIF ); - break; - } - - DB_RETURN( 0 ); -} - - - -#define SEEN_END 0x00 -#define SEEN_IF 0x01 -#define SEEN_ELSE 0x02 -#define SEEN_ELIF 0x04 - -#define ACCEPT_IF 0x10 -#define ACCEPT_ELIF 0x20 - -static int -_handle_conditional( opcode, tg ) - int opcode; - TKSTRPTR tg; -{ - static short action[MAX_COND_DEPTH]; - static char ifcntl[MAX_COND_DEPTH]; - char *cst; - char *lhs, *expr, *expr_end; - char *lop; - int result; - - DB_ENTER( "_handle_conditional" ); - - switch( opcode ) { - case ST_ELIF: - if( !(ifcntl[Nest_level] & SEEN_IF) || (ifcntl[Nest_level]&SEEN_ELSE) ) - Fatal(".ELIF without a preceeding .IF" ); - /*FALLTHRU*/ - - case ST_IF: - case ST_IFEQ: - case ST_IFNEQ: - if( opcode != ST_ELIF && (Nest_level+1) == MAX_COND_DEPTH ) - Fatal( ".IF .ELSE ... .END nesting too deep" ); - - If_expand = TRUE; - expr = Expand( Get_token( tg, NIL(char), FALSE )); - If_expand = FALSE; - - /* Remove CONTINUATION_CHAR<nl> and replace with " " so that line - * continuations are recognized as whitespace. */ - for( cst=strchr(expr,CONTINUATION_CHAR); cst != NIL(char); cst=strchr(cst,CONTINUATION_CHAR) ) - if( cst[1] == '\n' ) { - *cst = ' '; - cst[1] = ' '; - } - else - cst++; - - lhs = expr; - SCAN_WHITE( lhs ); - - /* Parse the expression and get its logical result */ - if ( ((lop = DmStrStr(lhs, "||" )) != NIL(char)) || ((lop = DmStrStr(lhs, "&&" )) != NIL(char)) ) - result = parse_complex_expression( lhs, &expr_end, opcode ); - else - result = partcomp( lhs, opcode ); - - if( expr != NIL(char) ) FREE( expr ); - - if( opcode != ST_ELIF ) { - Nest_level++; - action[Nest_level] = 1; - } - ifcntl[Nest_level] |= (opcode==ST_ELIF)?SEEN_ELIF:SEEN_IF; - - if( result ) { - if( !(ifcntl[Nest_level] & (ACCEPT_IF|ACCEPT_ELIF)) ) { - action[ Nest_level ] = action[ Nest_level-1 ]; - ifcntl[Nest_level] |= (opcode==ST_ELIF)?ACCEPT_ELIF:ACCEPT_IF; - } - else - action[Nest_level] = 1; - } - else - action[Nest_level] = 1; - break; - - case ST_ELSE: - if( Nest_level <= 0 ) Fatal( ".ELSE without .IF" ); - if( ifcntl[Nest_level] & SEEN_ELSE ) - Fatal( "Missing .IF or .ELIF before .ELSE" ); - - if( ifcntl[Nest_level] & (ACCEPT_IF|ACCEPT_ELIF) ) - action[Nest_level] = 1; - else if( action[ Nest_level-1 ] != 1 ) - action[ Nest_level ] ^= 0x1; /* flip between 0 and 1 */ - - ifcntl[Nest_level] |= SEEN_ELSE; - break; - - case ST_END: - ifcntl[Nest_level] = SEEN_END; - Nest_level--; - if( Nest_level < 0 ) Fatal( "Unmatched .END[IF]" ); - break; - } - - DB_RETURN( action[ Nest_level ] ); -} - -/* uncomment to turn on expression debug statements */ -/*#define PARSE_DEBUG */ -#define PARSE_SKIP_WHITE(A) while( *A && ((*A==' ') || (*A=='\t')) ) A++; - -#define OP_NONE 0 -#define OP_AND 1 -#define OP_OR 2 - -static int n = 1; - -int parse_complex_expression( char *expr, char **expr_end, int opcode ) -{ - char *p = expr; - char *term_start = p; - char *term_end; - int local_term; - char *part; - int term_result = FALSE; - int final_result = TRUE; - unsigned int term_len; - unsigned int last_op = OP_NONE; - - #ifdef PARSE_DEBUG - printf( "%d: parse_complex_expression( %s ): Opcode: %d\n", n, expr, opcode ); - #endif - - while ( 1 ) - { - /* A new sub-expression */ - local_term = TRUE; - if ( *p == '(' ) - { - n++; - term_result = parse_complex_expression( p+1, &p, opcode ); - n--; - PARSE_SKIP_WHITE( p ); - term_start = p; - term_end = p; - local_term = FALSE; - } - else - term_end = p; - - /* Lets do an operation!! */ - if ( !(*p) /* at the end of the entire line */ - || ((*p == '&') && (*(p+1) && (*(p+1)=='&'))) /* found an && */ - || ((*p == '|') && (*(p+1) && (*(p+1)=='|'))) /* found an || */ - || (*p == ')') ) /* at the end of our term */ - { - /* Grab the sub-expression if we parsed it. Otherwise, - * it was a () subexpression and we don't need to evaluate - * it since that was already done. - */ - if ( local_term == TRUE ) - { - /* Back up 1 to the end of the actual term */ - term_end--; - - /* Evaluate the term */ - PARSE_SKIP_WHITE( term_start ); - term_len = term_end - term_start + 1; - part = MALLOC( term_len + 1, char ); - strncpy( part, term_start, term_len ); - *(part+term_len) = '\0'; - #ifdef PARSE_DEBUG - printf( "%d: evaling '%s'\n", n, part ); - #endif - term_result = partcomp( part, opcode ); - #ifdef PARSE_DEBUG - printf( "%d: evaled, result %d\n", n, term_result ); - #endif - FREE( part ); - } - - /* Do the actual logical operation using the _preceding_ - * logical operator, NOT the one we just found. - */ - if ( last_op == OP_AND ) - final_result = final_result && term_result; - else if ( last_op == OP_OR ) - final_result = final_result || term_result; - else - final_result = term_result; - #ifdef PARSE_DEBUG - printf( "%d: final_result:%d\n", n, final_result ); - #endif - - /* If we're not at the end of the line, just keep going */ - if ( *p ) - { - /* Recognize the operator we just found above */ - if ( *p == '&' ) - last_op = OP_AND; - else if ( *p == '|' ) - last_op = OP_OR; - if ( *p != ')' ) - p += 2; - - /* Get the start of the next term */ - PARSE_SKIP_WHITE( p ); - term_start = p; - - /* If this is the close of a term, we are done and return - * to our caller. - */ - if ( *p == ')' ) - { - p++; - break; - } - } - else break; /* At end of line, all done */ - } - else if ( local_term == TRUE ) p++; /* Advance to next char in expression */ - } - *expr_end = p; - - #ifdef PARSE_DEBUG - printf( "%d: done, returning '%s', result %d\n", n, *expr_end, final_result ); - #endif - return( final_result ); -} - - -int partcomp( char* lhs, int opcode ) -{ - - char *tok, *rhs, *op = 0; - int result, opsind; - const int localopscount=4; - char* localops[] = { "==", "!=", "<=", ">=" }; - int lint, rint; - -#define EQUAL 0 -#define NOTEQUAL 1 -#define LESS_EQUAL 2 -#define GREATER_EQUAL 3 - - #ifdef PARSE_DEBUG - printf( "eval: %s\n", lhs); - #endif - - opsind = 0; - if( opcode == ST_IFEQ || opcode == ST_IFNEQ ) - { - /* IF[N]EQ syntax is: .IF[N]EQ <1> <2> - * Here, step over first argument and get to <2> if it exists. - */ - for( op = lhs; ((*op)&&(*op != ' ')&&(*op != '\t')); op++ ); - if( *op ) op++; /* position op at start of <2> */ - else op = NIL(char); /* only 1 argument given */ - } - else - { - /* Find which logical operator we are to use for this expression, - * and jump to it */ - while ( (opsind < localopscount) && ((op = DmStrStr(lhs, localops[opsind])) == NIL(char)) ) - opsind++; - - #ifdef PARSE_DEBUG - printf(" found op %d: %s\n", opsind, localops[opsind]); - #endif - } - - /* If the opcode was IFEQ or IFNEQ and only 1 argument was given, - * or an unknown logical operator was encountered, - * return false if argument is empty string, true if !empty - */ - if( op == NIL(char) ) - result = (*lhs != '\0'); - else - { - /* Make both characters of the operation the same, replacing the = in op[1] - * Its easier to deal with this way??? - */ - if( opcode != ST_IFEQ && opcode != ST_IFNEQ ) - op[1] = op[0]; - - #ifdef PARSE_DEBUG - printf(" op:%s\n", op); - #endif - - /* Isolate the left half of the expression */ - if( lhs != op ) - { - for( tok = op-1; (tok != lhs) && ((*tok == ' ')||(*tok == '\t')); tok-- ); - tok[1] = '\0'; - } - else - lhs = NIL(char); /* Left hand side is empty. */ - - /* Jump over the operation so we can grab the right half of the expression */ - if( opcode == ST_IFEQ || opcode == ST_IFNEQ ) - op--; - else - op++; - - /* Isolate the right half of the expression */ - rhs = DmStrSpn( op+1, " \t" ); - if( !*rhs ) rhs = NIL(char); - - #ifdef PARSE_DEBUG - printf(" lhs:%s, rhs:%s\n", lhs, rhs); - #endif - - /* Do the actual logical operation on the expression */ - if ( opsind > NOTEQUAL ) - { - switch( opsind ) - { - case LESS_EQUAL: - case GREATER_EQUAL: - /* Ignore quotes around the arguments */ - if ( lhs && lhs[0] == '"' ) lhs++; - if ( rhs && rhs[0] == '"' ) rhs++; - - /* Empty strings evaluate to zero. */ - lint = lhs ? atoi( lhs ) : 0; - rint = rhs ? atoi( rhs ) : 0; - result = ( lint >= rint ) ? TRUE : FALSE; - if ( opsind == LESS_EQUAL && lint != rint ) - result = !result; - break; - default: - result = FALSE; - } - } - else - { - /* Use a simple string compare to determine equality */ - if( (rhs == NIL(char)) || (lhs == NIL(char)) ) - result = (rhs == lhs) ? TRUE : FALSE; - else - { - /* String off whitespace at the end of the right half of the expression */ - tok = rhs + strlen( rhs ); - for( tok=tok-1; (tok != lhs) && ((*tok == ' ')||(*tok == '\t')); tok--); - tok[1] = '\0'; - - result = (strcmp( lhs, rhs ) == 0) ? TRUE : FALSE; - } - - if( *op == '!' || opcode == ST_IFNEQ ) result = !result; - } - } - - #ifdef PARSE_DEBUG - printf("partresult %d\n\n",result); - #endif - return result; -} - |