532 lines
14 KiB
C
532 lines
14 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#if (defined(_WIN32) || defined(_MSDOS) || defined(__IBMC__)) && !(defined S390)
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#include <io.h>
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#else
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#include <unistd.h>
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#endif
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#include "cpp.h"
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static char wbuf[4 * OBS];
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static char *wbp = wbuf;
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static int EBCDIC_ExternTokenDetected = 0;
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static int EBCDIC_StartTokenDetected = 0;
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unsigned char toLatin1[256] =
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{
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0x00, 0x01, 0x02, 0x03, 0x9c, 0x09, 0x86, 0x7f, 0x97, 0x8d,
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0x8e, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13,
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0x9d, 0x0a, 0x08, 0x87, 0x18, 0x19, 0x92, 0x8f, 0x1c, 0x1d,
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0x1e, 0x1f, 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x17, 0x1b,
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0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x05, 0x06, 0x07, 0x90, 0x91,
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0x16, 0x93, 0x94, 0x95, 0x96, 0x04, 0x98, 0x99, 0x9a, 0x9b,
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0x14, 0x15, 0x9e, 0x1a, 0x20, 0xa0, 0xe2, 0xe4, 0xe0, 0xe1,
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0xe3, 0xe5, 0xe7, 0xf1, 0xa2, 0x2e, 0x3c, 0x28, 0x2b, 0x7c,
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0x26, 0xe9, 0xea, 0xeb, 0xe8, 0xed, 0xee, 0xef, 0xec, 0xdf,
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0x21, 0x24, 0x2a, 0x29, 0x3b, 0x5e, 0x2d, 0x2f, 0xc2, 0xc4,
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0xc0, 0xc1, 0xc3, 0xc5, 0xc7, 0xd1, 0xa6, 0x2c, 0x25, 0x5f,
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0x3e, 0x3f, 0xf8, 0xc9, 0xca, 0xcb, 0xc8, 0xcd, 0xce, 0xcf,
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0xcc, 0x60, 0x3a, 0x23, 0x40, 0x27, 0x3d, 0x22,
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0xd8, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
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0xab, 0xbb, 0xf0, 0xfd, 0xfe, 0xb1, 0xb0, 0x6a, 0x6b, 0x6c,
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0x6d, 0x6e, 0x6f, 0x70, 0x71, 0x72, 0xaa, 0xba, 0xe6, 0xb8,
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0xc6, 0xa4, 0xb5, 0x7e, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
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0x79, 0x7a, 0xa1, 0xbf, 0xd0, 0x5b, 0xde, 0xae, 0xac, 0xa3,
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0xa5, 0xb7, 0xa9, 0xa7, 0xb6, 0xbc, 0xbd, 0xbe, 0xdd, 0xa8,
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0xaf, 0x5d, 0xb4, 0xd7, 0x7b, 0x41, 0x42, 0x43, 0x44, 0x45,
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0x46, 0x47, 0x48, 0x49, 0xad, 0xf4, 0xf6, 0xf2, 0xf3, 0xf5,
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0x7d, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, 0x50, 0x51, 0x52,
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0xb9, 0xfb, 0xfc, 0xf9, 0xfa, 0xff, 0x5c, 0xf7, 0x53, 0x54,
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0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0xb2, 0xd4, 0xd6, 0xd2,
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0xd3, 0xd5, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
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0x38, 0x39, 0xb3, 0xdb, 0xdc, 0xd9, 0xda, 0x9f
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};
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#define MASK "\\x%x"
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int
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memcpy_EBCDIC( char * pwbuf, uchar *p, int len )
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{
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int newlen = 0;
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int currpos = 0;
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int processedchars = 0;
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if( len == 0 )
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return 0;
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if( len == 1 )
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{
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*pwbuf = *p;
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return 1;
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}
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/* copy spaces until " or ' */
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while( (p[ processedchars ] != '\"') && (p[ processedchars ] != '\'') )
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pwbuf[ currpos++ ] = p[ processedchars++ ];
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/* copy first " or ' */
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pwbuf[ currpos++ ] = p[ processedchars++ ];
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/* convert all characters until " or ' */
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while( processedchars < (len - 1) )
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{
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if( p[ processedchars ] == '\\' )
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{
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switch( p[ ++processedchars ] )
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{
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case 'n':
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currpos += sprintf( &pwbuf[ currpos ], MASK, toLatin1['\n'] );
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processedchars++;
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break;
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case 't':
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currpos += sprintf( &pwbuf[ currpos ], MASK, toLatin1['\t'] );
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processedchars++;
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break;
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case 'v':
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currpos += sprintf( &pwbuf[ currpos ], MASK, toLatin1['\v'] );
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processedchars++;
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break;
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case 'b':
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currpos += sprintf( &pwbuf[ currpos ], MASK, toLatin1['\b'] );
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processedchars++;
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break;
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case 'r':
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currpos += sprintf( &pwbuf[ currpos ], MASK, toLatin1['\r'] );
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processedchars++;
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break;
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case 'f':
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currpos += sprintf( &pwbuf[ currpos ], MASK, toLatin1['\f'] );
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processedchars++;
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break;
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case 'a':
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currpos += sprintf( &pwbuf[ currpos ], MASK, toLatin1['\a'] );
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processedchars++;
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break;
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case '\\':
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currpos += sprintf( &pwbuf[ currpos ], MASK, toLatin1['\\'] );
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processedchars++;
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break;
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case '?':
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currpos += sprintf( &pwbuf[ currpos ], MASK, toLatin1['\?'] );
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processedchars++;
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break;
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case '\'':
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currpos += sprintf( &pwbuf[ currpos ], MASK, toLatin1['\''] );
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processedchars++;
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break;
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case '"':
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currpos += sprintf( &pwbuf[ currpos ], MASK, toLatin1['\"'] );
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processedchars++;
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break;
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/* octal coded character? -> copy */
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case '0':
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case '1':
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case '2':
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case '3':
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case '4':
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case '5':
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case '6':
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case '7':
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{
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int startpos = currpos;
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pwbuf[ currpos++ ] = '\\';
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while( p[ processedchars ] >= '0' && p[ processedchars ] <= '7' && (currpos < startpos + 4) )
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pwbuf[ currpos++ ] = (unsigned char)p[ processedchars++ ];
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break;
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}
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/* hex coded character? -> copy */
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case 'x':
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case 'X':
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{
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int startpos = currpos;
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pwbuf[ currpos++ ] = '\\';
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pwbuf[ currpos++ ] = 'x';
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processedchars++;
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while( isxdigit( p[ processedchars ] ) && (currpos < startpos + 4) )
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pwbuf[ currpos++ ] = (unsigned char)p[ processedchars++ ];
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break;
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}
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}
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}
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else
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currpos += sprintf( &pwbuf[ currpos ], MASK, toLatin1[p[ processedchars++ ]] );
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}
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/* copy last " or ' */
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pwbuf[ currpos++ ] = p[ processedchars ];
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return currpos;
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}
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void
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maketokenrow(int size, Tokenrow * trp)
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{
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trp->max = size;
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if (size > 0)
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trp->bp = (Token *) domalloc(size * sizeof(Token));
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else
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trp->bp = NULL;
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trp->tp = trp->bp;
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trp->lp = trp->bp;
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}
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Token *
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growtokenrow(Tokenrow * trp)
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{
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int ncur = trp->tp - trp->bp;
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int nlast = trp->lp - trp->bp;
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trp->max = 3 * trp->max / 2 + 1;
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trp->bp = (Token *) realloc(trp->bp, trp->max * sizeof(Token));
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trp->lp = &trp->bp[nlast];
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trp->tp = &trp->bp[ncur];
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return trp->lp;
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}
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/*
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* Compare a row of tokens, ignoring the content of WS; return !=0 if different
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*/
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int
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comparetokens(Tokenrow * tr1, Tokenrow * tr2)
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{
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Token *tp1, *tp2;
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tp1 = tr1->tp;
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tp2 = tr2->tp;
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if (tr1->lp - tp1 != tr2->lp - tp2)
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return 1;
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for (; tp1 < tr1->lp; tp1++, tp2++)
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{
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if (tp1->type != tp2->type
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|| (tp1->wslen == 0) != (tp2->wslen == 0)
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|| tp1->len != tp2->len
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|| strncmp((char *) tp1->t, (char *) tp2->t, tp1->len) != 0)
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return 1;
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}
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return 0;
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}
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/*
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* replace ntok tokens starting at dtr->tp with the contents of str.
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* tp ends up pointing just beyond the replacement.
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* Canonical whitespace is assured on each side.
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*/
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void
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insertrow(Tokenrow * dtr, int ntok, Tokenrow * str)
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{
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int nrtok = rowlen(str);
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dtr->tp += ntok;
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adjustrow(dtr, nrtok - ntok);
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dtr->tp -= ntok;
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movetokenrow(dtr, str);
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dtr->tp += nrtok;
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}
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/*
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* make sure there is WS before trp->tp, if tokens might merge in the output
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*/
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void
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makespace(Tokenrow * trp, Token * ntp)
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{
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uchar *tt;
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Token *tp = trp->tp;
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if (tp >= trp->lp)
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return;
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if (ntp->wslen)
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{
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tt = newstring(tp->t, tp->len, ntp->wslen);
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strncpy((char *)tt, (char *)ntp->t - ntp->wslen, ntp->wslen);
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tp->t = tt + ntp->wslen;
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tp->wslen = ntp->wslen;
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tp->flag |= XPWS;
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}
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}
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/*
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* Copy an entire tokenrow into another, at tp.
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* It is assumed that there is enough space.
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* Not strictly conforming.
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*/
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void
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movetokenrow(Tokenrow * dtr, Tokenrow * str)
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{
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int nby;
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/* nby = sizeof(Token) * (str->lp - str->bp); */
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nby = (char *) str->lp - (char *) str->bp;
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memmove(dtr->tp, str->bp, nby);
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}
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/*
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* Move the tokens in a row, starting at tr->tp, rightward by nt tokens;
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* nt may be negative (left move).
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* The row may need to be grown.
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* Non-strictly conforming because of the (char *), but easily fixed
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*/
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void
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adjustrow(Tokenrow * trp, int nt)
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{
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int nby, size;
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if (nt == 0)
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return;
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size = (trp->lp - trp->bp) + nt;
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while (size > trp->max)
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growtokenrow(trp);
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/* nby = sizeof(Token) * (trp->lp - trp->tp); */
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nby = (char *) trp->lp - (char *) trp->tp;
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if (nby)
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memmove(trp->tp + nt, trp->tp, nby);
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trp->lp += nt;
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}
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/*
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* Copy a row of tokens into the destination holder, allocating
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* the space for the contents. Return the destination.
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*/
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Tokenrow *
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copytokenrow(Tokenrow * dtr, Tokenrow * str)
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{
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int len = rowlen(str);
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maketokenrow(len, dtr);
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movetokenrow(dtr, str);
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dtr->lp += len;
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return dtr;
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}
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/*
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* Produce a copy of a row of tokens. Start at trp->tp.
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* The value strings are copied as well. The first token
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* has WS available.
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*/
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Tokenrow *
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normtokenrow(Tokenrow * trp)
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{
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Token *tp;
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Tokenrow *ntrp = new(Tokenrow);
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int len;
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len = trp->lp - trp->tp;
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if (len <= 0)
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len = 1;
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maketokenrow(len, ntrp);
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for (tp = trp->tp; tp < trp->lp; tp++)
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{
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*ntrp->lp = *tp;
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if (tp->len)
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{
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ntrp->lp->t = newstring(tp->t, tp->len, 1);
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*ntrp->lp->t++ = ' ';
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if (tp->wslen)
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ntrp->lp->wslen = 1;
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}
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ntrp->lp++;
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}
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if (ntrp->lp > ntrp->bp)
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ntrp->bp->wslen = 0;
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return ntrp;
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}
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/*
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* Debugging
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*/
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void
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peektokens(Tokenrow * trp, char *str)
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{
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Token *tp;
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tp = trp->tp;
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flushout();
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if (str)
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fprintf(stderr, "%s ", str);
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if (tp < trp->bp || tp > trp->lp)
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fprintf(stderr, "(tp offset %d) ", tp - trp->bp);
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for (tp = trp->bp; tp < trp->lp && tp < trp->bp + 32; tp++)
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{
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if (tp->type != NL)
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{
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int c = tp->t[tp->len];
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tp->t[tp->len] = 0;
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fprintf(stderr, "%s", tp->t);
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tp->t[tp->len] = c;
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}
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fprintf(stderr, tp == trp->tp ? "{%x*} " : "{%x} ", tp->type);
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}
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fprintf(stderr, "\n");
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fflush(stderr);
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}
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void
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puttokens(Tokenrow * trp)
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{
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Token *tp;
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int len;
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uchar *p;
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if (Vflag)
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peektokens(trp, "");
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tp = trp->bp;
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for (; tp < trp->lp; tp++)
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{
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if (tp->type != NL)
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{
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len = tp->len + tp->wslen;
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p = tp->t - tp->wslen;
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/* add parameter check to delete operator? */
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if( Dflag )
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{
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if( (tp->type == NAME) && (strncmp( (char*)p, "delete", len ) == 0) )
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{
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Token* ntp = tp;
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ntp++;
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if( ntp->type == NAME )
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{
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uchar* np = ntp->t - ntp->wslen;
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int nlen = ntp->len + ntp->wslen;
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memcpy(wbp, "if(", 3 );
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wbp += 4;
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memcpy(wbp, np, nlen );
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wbp += nlen;
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memcpy(wbp, ")", 1 );
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wbp++;
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memcpy(wbp, p, len);
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}
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}
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}
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/* EBCDIC to ANSI conversion requested? */
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if( Aflag )
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{
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/* keyword __ToLatin1__ found? -> do conversion! */
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if( EBCDIC_StartTokenDetected )
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{
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/* previous token was 'extern'? -> don't convert current token! */
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if( EBCDIC_ExternTokenDetected )
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{
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EBCDIC_ExternTokenDetected = 0;
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memcpy(wbp, p, len);
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}
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else
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{
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/* current token is keyword 'extern'? -> don't convert following token! */
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if( (tp->wslen == 0) && (strncmp( (char*)p, "extern", len ) == 0) )
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{
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EBCDIC_ExternTokenDetected = 1;
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memcpy(wbp, p, len);
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}
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else
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{
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/* token is string or char? -> process EBCDIC to ANSI conversion */
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if ((tp->type == STRING) || (tp->type == CCON))
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len = memcpy_EBCDIC(wbp, p, len);
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else
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memcpy(wbp, p, len);
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}
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}
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}
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else
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/* keyword __ToLatin1__ found? -> don't copy keyword and start conversion */
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if( (tp->type == NAME) && (strncmp( (char*)p, "__ToLatin1__", len) == 0) )
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{
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EBCDIC_StartTokenDetected = 1;
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len = 0;
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}
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else
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memcpy(wbp, p, len);
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}
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else
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memcpy(wbp, p, len);
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wbp += len;
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}
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else
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*wbp++ = '\n';
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if (wbp >= &wbuf[OBS])
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{
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write(1, wbuf, OBS);
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if (wbp > &wbuf[OBS])
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memcpy(wbuf, wbuf + OBS, wbp - &wbuf[OBS]);
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wbp -= OBS;
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}
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}
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trp->tp = tp;
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if (cursource->fd == 0)
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flushout();
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}
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void
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flushout(void)
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{
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if (wbp > wbuf)
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{
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write(1, wbuf, wbp - wbuf);
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wbp = wbuf;
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}
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}
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/*
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* turn a row into just a newline
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*/
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void
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setempty(Tokenrow * trp)
|
|
{
|
|
trp->tp = trp->bp;
|
|
trp->lp = trp->bp + 1;
|
|
*trp->bp = nltoken;
|
|
}
|
|
|
|
/*
|
|
* generate a number
|
|
*/
|
|
char *
|
|
outnum(char *p, int n)
|
|
{
|
|
if (n >= 10)
|
|
p = outnum(p, n / 10);
|
|
*p++ = n % 10 + '0';
|
|
return p;
|
|
}
|
|
|
|
/*
|
|
* allocate and initialize a new string from s, of length l, at offset o
|
|
* Null terminated.
|
|
*/
|
|
uchar *
|
|
newstring(uchar * s, int l, int o)
|
|
{
|
|
uchar *ns = (uchar *) domalloc(l + o + 1);
|
|
|
|
ns[l + o] = '\0';
|
|
return (uchar *) strncpy((char *) ns + o, (char *) s, l) - o;
|
|
}
|