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This adds support for -s to the m4(1) utility, which causes #line directives
to be emitted as per the C preprocessor. It updates the manual page in regards to standards accordingly. PR: standards/36075 Submitted by: tjr Reviewed by: mike MFC after: 1 week
This commit is contained in:
Juli Mallett
parent
2ecf206550
commit
b1ea3d46b7
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=94957
@ -584,7 +584,11 @@ char *ifile;
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errx(1, "too many include files");
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if ((infile[ilevel + 1] = fopen(ifile, "r")) != NULL) {
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ilevel++;
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if ((inname[ilevel] = strdup(ifile)) == NULL)
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err(1, NULL);
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inlineno[ilevel] = 1;
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bbase[ilevel] = bufbase = bp;
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emitline();
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return (1);
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}
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else
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@ -604,9 +608,11 @@ char *pfile;
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register int c;
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if ((pf = fopen(pfile, "r")) != NULL) {
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fprintf(active, "#line 1 \"%s\"\n", pfile);
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while ((c = getc(pf)) != EOF)
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putc(c, active);
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(void) fclose(pf);
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emitline();
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return (1);
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}
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else
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@ -53,6 +53,7 @@ int dopaste(char *);
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void dopushdef(char *, char *);
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void dosub(char *[], int);
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void doundiv(char *[], int);
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void emitline(void);
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void eval(char *[], int, int);
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void expand(char *[], int);
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void getdiv(int);
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@ -72,6 +73,8 @@ extern ndptr hashtab[]; /* hash table for macros etc. */
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extern stae mstack[]; /* stack of m4 machine */
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extern FILE *active; /* active output file pointer */
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extern FILE *infile[]; /* input file stack (0=stdin) */
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extern char *inname[]; /* names of these input files */
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extern int inlineno[]; /* current number in each input*/
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extern FILE *outfile[]; /* diversion array(0=bitbucket) */
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extern int fp; /* m4 call frame pointer */
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extern int ilevel; /* input file stack pointer */
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@ -92,3 +95,5 @@ extern char *m4wraps; /* m4wrap string default. */
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extern char *null; /* as it says.. just a null. */
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extern char rquote; /* right quote character (') */
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extern char scommt; /* start character for comment */
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extern int synccpp; /* Line synchronisation for C preprocessor */
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extern int chscratch; /* Scratch space for gpbc() macro */
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@ -1,7 +1,7 @@
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.\"
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.\" @(#) $FreeBSD$
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.\"
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.Dd January 26, 1993
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.Dd April 17, 2002
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.Dt M4 1
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.Os
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.Sh NAME
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@ -10,9 +10,9 @@
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.Sh SYNOPSIS
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.Nm
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.Oo
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.Fl D Ns Ar name Ns Op Ar =value
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.Fl D Ar name Ns Op Ar =value
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.Oc
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.Op Fl U Ns Ar name
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.Op Fl U Ar name
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.Op Ar filename
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\|.\|.\|.
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.Sh DESCRIPTION
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@ -41,13 +41,18 @@ the quote characters with the changequote built-in macro.
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.Pp
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The options are as follows:
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.Bl -tag -width "-Dname[=value]xxx"
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.It Fl D Ns Ar name Ns Oo
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.It Fl s
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Emit
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.Em #line
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directives for
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.Xr cpp 1 .
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.It Fl D Ar name Ns Oo
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.Ar =value
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.Oc
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Define the symbol
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.Ar name
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to have some value (or NULL).
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.It Fl "U" Ns Ar "name"
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.It Fl "U" Ar "name"
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Undefine the symbol
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.Ar name .
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.El
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@ -177,7 +182,35 @@ Flushes the named output queues (or all queues if no arguments).
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.It unix
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A pre-defined macro for testing the OS platform.
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.El
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.Sh DIAGNOSTICS
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.Ex -std
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.Pp
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The exit status can be specified by the input file using the
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.Em m4exit
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macro.
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.Sh "SEE ALSO"
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.Xr cpp 1
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.Sh STANDARDS
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The
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.Nm
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utility is compatible with the
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.St -p1003.1-2001
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specification with the exception of the
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.Em traceon
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and
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.Em traceoff
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built-in macros, which are not implemented.
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.Pp
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The
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.Em expr ,
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.Em paste ,
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.Em spaste
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and
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.Em unix
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built-in macros are extensions to the standard.
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.Sh AUTHORS
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.An Ozan Yigit Aq oz@sis.yorku.ca
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and
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.An Richard A. O'Keefe Aq ok@goanna.cs.rmit.OZ.AU
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.Sh BUGS
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The tracing macros are not implemented.
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@ -80,6 +80,8 @@ char *endest= strspace+STRSPMAX;/* end of string space */
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int sp; /* current m4 stack pointer */
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int fp; /* m4 call frame pointer */
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FILE *infile[MAXINP]; /* input file stack (0=stdin) */
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char *inname[MAXINP]; /* names of these input files */
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int inlineno[MAXINP]; /* current number in each input*/
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FILE *outfile[MAXOUT]; /* diversion array(0=bitbucket)*/
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FILE *active; /* active output file pointer */
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char *m4temp; /* filename for diversions */
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@ -92,6 +94,8 @@ char lquote = LQUOTE; /* left quote character (`) */
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char rquote = RQUOTE; /* right quote character (') */
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char scommt = SCOMMT; /* start character for comment */
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char ecommt = ECOMMT; /* end character for comment */
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int synccpp; /* Line synchronisation for C preprocessor */
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int chscratch; /* Scratch space for gpbc() macro */
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struct keyblk keywrds[] = { /* m4 keywords to be installed */
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"include", INCLTYPE,
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@ -159,7 +163,7 @@ main(argc,argv)
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initkwds();
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while ((c = getopt(argc, argv, "tD:U:o:")) != -1)
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while ((c = getopt(argc, argv, "D:U:s")) != -1)
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switch(c) {
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case 'D': /* define something..*/
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@ -173,7 +177,9 @@ main(argc,argv)
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case 'U': /* undefine... */
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remhash(optarg, TOP);
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break;
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case 'o': /* specific output */
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case 's':
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synccpp = 1;
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break;
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case '?':
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usage();
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}
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@ -195,6 +201,10 @@ main(argc,argv)
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sp = -1; /* stack pointer initialized */
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fp = 0; /* frame pointer initialized */
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infile[0] = stdin; /* default input (naturally) */
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if ((inname[0] = strdup("-")) == NULL)
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err(1, NULL);
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inlineno[0] = 1;
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emitline();
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macro();
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} else
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for (; argc--; ++argv) {
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@ -206,6 +216,10 @@ main(argc,argv)
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sp = -1;
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fp = 0;
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infile[0] = ifp;
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if ((inname[0] = strdup(p)) == NULL)
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err(1, NULL);
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inlineno[0] = 1;
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emitline();
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macro();
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if (ifp != stdin)
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(void)fclose(ifp);
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@ -282,7 +296,9 @@ macro() {
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break; /* all done thanks.. */
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--ilevel;
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(void) fclose(infile[ilevel+1]);
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free(inname[ilevel+1]);
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bufbase = bbase[ilevel];
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emitline();
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continue;
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}
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/*
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@ -419,3 +435,12 @@ initkwds() {
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p->type = keywrds[i].ktyp | STATIC;
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}
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}
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/* Emit preprocessor #line directive if -s option used. */
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void
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emitline(void)
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{
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if (synccpp)
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fprintf(active, "#line %d \"%s\"\n", inlineno[ilevel],
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inname[ilevel]);
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}
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@ -34,6 +34,7 @@
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* SUCH DAMAGE.
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*
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* @(#)mdef.h 8.1 (Berkeley) 6/6/93
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* $FreeBSD$
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*/
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#define MACRTYPE 1
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@ -142,7 +143,9 @@ typedef union { /* stack structure */
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* pushf() - push a call frame entry onto stack
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* pushs() - push a string pointer onto stack
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*/
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#define gpbc() (bp > bufbase) ? (*--bp ? *bp : EOF) : getc(infile[ilevel])
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#define gpbc() (bp > bufbase) ? (*--bp ? *bp : EOF) : \
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((chscratch = getc(infile[ilevel])) == '\n' && ++inlineno[ilevel], \
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chscratch)
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#define pushf(x) if (sp < STACKMAX) mstack[++sp].sfra = (x)
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#define pushs(x) if (sp < STACKMAX) mstack[++sp].sstr = (x)
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@ -219,6 +219,7 @@ int n;
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void
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usage()
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{
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fprintf(stderr, "usage: m4 [-Dname[=val]] [-Uname]\n");
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fprintf(stderr,
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"usage: m4 [-s] [-D name[=val]]... [-U name]... file...\n");
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exit(1);
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}
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