diff options
Diffstat (limited to 'ifdef.c')
| -rw-r--r-- | ifdef.c | 100 |
1 files changed, 93 insertions, 7 deletions
@@ -1,4 +1,4 @@ -/* (C) 1992,1996 R de Bath */ +/* (C) 1992,1996,1998-9 R de Bath */ #include <stdio.h> #include <ctype.h> @@ -13,6 +13,10 @@ #define void char #endif +/* + * Linked list of variables, the only source for these is the command line + * and the (optional) manifest constants. + */ struct varrec { struct varrec * next; @@ -25,6 +29,8 @@ int cuttype = 0; /* 0 = use blank lines */ /* 1 = use #lines */ /* 2 = use '# 'oldtext */ /* 3 = delete unused lines */ +int striphash = 0; +int stripcomment = 0; char linebuf[2048]; @@ -84,6 +90,7 @@ char ** argv; case 'C': case 'c': cuttype = 2; break; case 'r': cuttype = 3; break; + case 'h': striphash=1; break; case 'M': manifest_constant(); break; case 'D': unknown_stat = 'D'; break; @@ -146,11 +153,14 @@ char * fname; if( cuttype == 1 ) printf("#line 1 \"%s\"\n", filename); + /* NB: limited line length */ while( fgets(linebuf, sizeof(linebuf), fd) != 0 ) { int f = 1; + char * p = linebuf; lineno++; - if( linebuf[0] == '#' ) + while(isspace(*p)) p++; + if( *p == '#' ) f = do_hashcom(); if(f) { @@ -184,9 +194,12 @@ int lineno; int do_hashcom() { - char * p = linebuf+1; + char * p = linebuf; int flg = -1; - while( *p == ' ' || *p == '\t' ) p++; + + while(isspace(*p)) p++; + if( *p == '#' ) p++; + while(isspace(*p)) p++; if(strncmp(p, "ifdef", 5) == 0) { @@ -198,7 +211,7 @@ do_hashcom() do_ifdef(p+6, 'U'); } else - if(strncmp(p, "if", 2) == 0 && (p[2]==' ' || p[2]=='\t') ) + if(strncmp(p, "if", 2) == 0 && isspace(p[2]) ) { state[iflevel++] = keeptext; keeptext |= 2; @@ -217,7 +230,7 @@ do_hashcom() iflevel--; keeptext = state[iflevel]; } - else if( cuttype != 0 ) return 1; + else if( !striphash ) return 1; if( flg < 0 ) flg = (keeptext&2); @@ -245,7 +258,7 @@ int which; s = curr->name; p = nm; while( *p == *s ) { p++; s++; } - if( *s == '\0' && *p <= ' ' ) + if( *s == '\0' && *p <= ' ' ) /* FIXME alphanum */ break; } state[iflevel] = keeptext; @@ -272,6 +285,79 @@ int which; return 1; } +#if 0 + +do_if(p) +char * p; +{ + /* + * Look for: + * defined Label + * one sort of || && + * 0 + * 1 + * + * Skip characters: WS, (, ) + * + * Give up on unknown characters and labels without a defined or assumed + * state. BUT note that if there is another label that forces the state + * of the result irrespective of an unknown label the state should be set. + * + */ + +static char wbuf[256]; + + int combiner = 0; + int true_defs = 0; + int false_defs = 0; + int unkn_defs = 0; + + int state = 0; + + char * d; + + for(;;) + { + d=wbuf; + do + { + while( isspace(*p) || (d==wbuf && (*p == '(' || *p == ')' ))) p++; + + if( d!=wbuf && (*p == '(' || *p == ')' )) break; + + while( !(isspace(*p) || *p == '(' || *p == ')' )) + if( d<wbuf+sizeof(wbuf)-2) *d++ = *p++; + else p++; + + *d= 0; + } + while( strcmp(wbuf, "!") == 0 ); + + if( state == 0 ) + { + if( strcmp(wbuf, "defined" ) == 0 ) + { + state = 1; + continue; + } + if( strcmp(wbuf, "!defined" ) == 0 ) + { + state = 2; + continue; + } + if( strcmp(wbuf, "||" ) == 0 || strcmp(wbuf, "&&") == 0 ) + { + if( combiner == 0 ) combiner = wbuf[0]; + if( combiner != wbuf[0] ) combiner = '@'; + continue; + } + /* Something we're not ready for ... */ + goto Dont_know; + } + } +} +#endif + void check_name(nm) char * nm; |