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- /* Copyright (c) 1980 Regents of the University of California. All rights
- * reserved. The Berkeley software License Agreement specifies the terms and
- * conditions for redistribution. */
-
- #ifndef lint
- char copyright[] =
- "@(#) Copyright (c) 1980 Regents of the University of California.\n\
- All rights reserved.\n";
- #endif not lint
-
- #ifndef lint
- static char sccsid[] = "@(#)indent.c 5.4 (Berkeley) 9/10/85";
- #endif not lint
-
- /*-
-
- Copyright (C) 1976
- by the
- Board of Trustees
- of the
- University of Illinois
-
- All rights reserved
-
-
- NAME:
- indent main program
-
- FUNCTION:
- This is the main program of the indent program. Indent will take a C
- program source and reformat it into a semi-reasonable form.
-
- ALGORITHM:
- The routine lexi scans tokens and passes them back one at a time to the
- main routine. The subroutine parse takes care of much of the work of
- figuring indentation level.
-
- 1) Call lexi
- 2) Enter a monster switch statement on the code returned by lexi. If
- the indentation level for the line yet to be printed should be
- changed, set the variable ps.ind_level. If the indentation level for
- the following line should be changed, set the variable ps.i_l_follow.
-
- */
-
- #include "indent_globs.h"
-
- char *in_name = "<stdin>"; /* will always point to name of input file */
- char *out_name = "<stdout>"; /* will always point to name of output file */
- char bakfile[32] = "";
-
- int dec_ind; /* current indentation for declarations */
- int di_stack[STACKS]; /* a stack of structure indentation levels */
- int flushed_nl; /* used when buffering up comments to
- * remember that a newline was passed over */
- int force_nl; /* when true, code must be broken */
- int hd_type; /* used to store type of stmt for if (...),
- * for (...), etc */
- int scase; /* set to true when we see a case, so we will
- * know what to do with the following colon */
- int sp_sw; /* when true, we are in the expressin of
- * if(...), while(...), etc. */
- int squest; /* when this is positive, we have seen a ?
- * without the matching : in a <c>?<s>:<s>
- * construct */
- int type_code; /* the type of token, returned by lexi */
-
- int last_else = 0; /* true iff last keyword was an else */
-
- int is_procname;
-
- #ifdef BUFFERING
- char *inbuf, *outbuf; /* buffering buffers */
- #endif
-
- void main(argc, argv)
- int argc;
- char **argv;
- {
- register char *t_ptr; /* used for copying tokens */
- register int i;
-
- /*-----------------------------------------------*\
- | INITIALIZATION |
- \*-----------------------------------------------*/
-
- sp_sw = force_nl = false;
- dec_ind = 0;
- squest = 0;
- di_stack[ps.dec_nest = 0] = 0;
- scase = ps.pcase = false;
-
- ps.p_stack[0] = stmt; /* this is the parser's stack */
- ps.last_nl = true; /* this is true if the last thing scanned was
- * a newline */
- ps.last_token = semicolon;
- combuf[0] = codebuf[0] = labbuf[0] = ' '; /* set up code, label, and
- * comment buffers */
- combuf[1] = codebuf[1] = labbuf[1] = '\0';
- s_lab = e_lab = labbuf + 1;
- s_code = e_code = codebuf + 1;
- s_com = e_com = combuf + 1;
-
- buf_ptr = buf_end = in_buffer;
- line_no = 1;
- had_eof = ps.in_decl = ps.decl_on_line = break_comma = false;
- ps.in_or_st = false;
- ps.bl_line = true;
- ps.want_blank = ps.in_stmt = ps.ind_stmt = false;
-
- sc_end = 0;
- bp_save = 0;
- be_save = 0;
-
- output = NULL;
-
- /*--------------------------------------------------*\
- | COMMAND LINE SCAN
- \*--------------------------------------------------*/
-
- set_defaults();
-
- /* Unfortunately, we must look for -npro here because the profiles are
- * read before the command line arguments. */
- for (i = 1; i < argc; ++i)
- if (strcmp(argv[i], "-npro") == 0)
- break;
- if (i >= argc)
- set_profile();
-
- input = NULL; /* cancel -st if it was in the profiles, */
- output = NULL; /* as it doesn't make any sense there. */
-
- for (i = 1; i < argc; ++i) {
-
- /* look thru args (if any) for changes to defaults */
-
- if (argv[i][0] != '-') {/* no flag on parameter */
- if (input == NULL) {/* we must have the input file */
- in_name = argv[i]; /* remember name of input file */
- input = fopen(in_name, "r");
- if (input == NULL) { /* check for open error */
- fprintf(stderr, "indent: can't open %s\n", argv[i]);
- exit(1);
- }
- continue;
- } else if (output == NULL) { /* we have the output file */
- out_name = argv[i]; /* remember name of output file */
- if (strcmp(in_name, out_name) == 0) { /* attempt to overwrite
- * the file */
- fprintf(stderr, "indent: input and output files must be different\n");
- exit(1);
- }
- output = fopen(out_name, "w");
- if (output == NULL) { /* check for create error */
- fprintf(stderr, "indent: can't create %s\n", argv[i]);
- exit(1);
- }
- continue;
- }
- fprintf(stderr, "indent: unknown parameter: %s\n", argv[i]);
- exit(1);
- } else
- set_option(argv[i]);
-
- } /* end of for */
- if (input == NULL) {
- fprintf(stderr, "Usage: indent file [ outfile ] [ options ]\n");
- exit(1);
- }
- if (output == NULL) {
- if (troff)
- output = stdout;
- else {
- out_name = in_name;
- bakcopy();
- }
- }
- #ifdef BUFFERING
- if ((inbuf = malloc(BUFSIZ)) == NULL || (outbuf = malloc(BUFSIZ)) == NULL) {
- fprintf(stderr, "indent: out of memory!\n");
- exit(1);
- }
- if (setvbuf(input, inbuf, _IOFBF, BUFSIZ) || setvbuf(output, outbuf, _IOFBF, BUFSIZ)) {
- fprintf(stderr, "indent: bufferring error!\n");
- exit(1);
- }
- #endif
-
- /* Adjust parameters that are out of range, or set defaults if no values
- * were specified. */
- if (ps.com_ind <= 1)
- ps.com_ind = 2; /* dont put normal comments before column 2 */
- if (block_comment_max_col <= 0)
- block_comment_max_col = max_col;
- if (ps.decl_com_ind <= 0) /* if not specified by user, set this */
- ps.decl_com_ind = ps.ljust_decl ? ps.com_ind - 8 : ps.com_ind;
- if (ps.decl_com_ind <= 1)
- ps.decl_com_ind = 2;
- if (continuation_indent == 0)
- continuation_indent = ps.ind_size;
- fill_buffer(); /* get first batch of stuff into input buffer */
-
- parse(semicolon);
-
- dosomething();
-
- if (troff) { /* this isn't going to work, but since there
- * isn't much call for troff on the PC, I
- * don't care. I'll leave it here though, for
- * your sake. */
- register char *p = in_name, *beg = in_name;
-
- while (*p)
- if (*p++ == '/')
- beg = p;
- fprintf(output, ".Fn \"%s\"\n", beg);
- }
- /*------------------------------*\
- | START OF MAIN LOOP |
- \*------------------------------*/
- for (;;) { /* this is the main loop. it will go until
- * we reach eof */
-
- type_code = lexi(); /* lexi reads one token. The actual
- * characters read are stored in "token".
- * lexi returns a code indicating the type of
- * token */
- is_procname = ps.procname[0];
-
- /* The following code moves everything following an if (), while (),
- * else, etc. up to the start of the following stmt to a buffer. This
- * allows proper handling of both kinds of brace placement. */
-
- flushed_nl = false;
- while (ps.search_brace) { /* if we scanned an if(), while(),
- * etc., we might need to copy stuff
- * into a buffer we must loop,
- * copying stuff into save_com, until
- * we find the start of the stmt
- * which follows the if, or whatever */
- switch (type_code) {
- case newline:
- ++line_no;
- flushed_nl = true;
- case form_feed:
- break; /* form feeds and newlines found here will be
- * ignored */
-
- case lbrace: /* this is a brace that starts the compound
- * stmt */
- if (sc_end == 0) { /* ignore buffering if a comment
- * wasn't stored up */
- ps.search_brace = false;
- goto check_type;
- }
- if (btype_2) {
- save_com[0] = '{'; /* we either want to put the
- * brace right after the if */
- goto sw_buffer; /* go to common code to get
- * out of this loop */
- }
- case comment: /* we have a comment, so we must copy it into
- * the buffer */
- if (!flushed_nl) {
- if (sc_end == NULL) { /* if this is the first
- * comment, we must set up
- * the buffer */
- save_com[0] = save_com[1] = ' ';
- sc_end = &(save_com[2]);
- } else {
- *sc_end++ = '\n'; /* add newline between
- * comments */
- *sc_end++ = ' ';
- --line_no;
- }
- *sc_end++ = '/'; /* copy in start of comment */
- *sc_end++ = '*';
-
- for (;;) { /* loop until we get to the end of
- * the comment */
- *sc_end = *buf_ptr++;
- if (buf_ptr >= buf_end)
- fill_buffer();
-
- if (*sc_end++ == '*' && *buf_ptr == '/')
- break; /* we are at end of comment */
-
- if (sc_end >= &(save_com[sc_size])) { /* check for temp buffer
- * overflow */
- diag(1, "Internal buff overflow - Move too large comment after if, while.");
- cleanup(1);
- }
- }
- *sc_end++ = '/'; /* add ending slash */
- if (++buf_ptr >= buf_end) /* get past / in buffer */
- fill_buffer();
- break;
- }
- default: /* it is the start of a normal statment */
- if (flushed_nl) /* if we flushed a newline, make sure
- * it is put back */
- force_nl = true;
- if (type_code == sp_paren && *token == 'i'
- && last_else && ps.else_if
- || type_code == sp_nparen && *token == 'e'
- && e_code != s_code && e_code[-1] == '}')
- force_nl = false;
-
- if (sc_end == NULL) { /* ignore buffering if
- * comment wasnt saved up */
- ps.search_brace = false;
- goto check_type;
- }
- if (force_nl) { /* if we should insert a nl here, put
- * it into the buffer */
- force_nl = false;
- --line_no; /* this will be re-increased when the
- * nl is read from the buffer */
- *sc_end++ = '\n';
- *sc_end++ = ' ';
- if (verbose && !flushed_nl) /* print error msg if
- * the line was not
- * already broken */
- diag(0, "Line broken");
- flushed_nl = false;
- }
- for (t_ptr = token; *t_ptr; ++t_ptr)
- *sc_end++ = *t_ptr; /* copy token into temp
- * buffer */
-
- sw_buffer:
- ps.search_brace = false; /* stop looking for start of
- * stmt */
- bp_save = buf_ptr; /* save current input buffer */
- be_save = buf_end;
- buf_ptr = save_com; /* fix so that subsequent
- * calls to lexi will take
- * tokens out of save_com */
- *sc_end++ = ' '; /* add trailing blank, just in case */
- buf_end = sc_end;
- sc_end = 0;
- break;
- } /* end of switch */
- if (type_code != 0) /* we must make this check, just in case
- * there was an unexpected EOF */
- type_code = lexi(); /* read another token */
- is_procname = ps.procname[0];
- } /* end of while (ps.search_brace) */
- last_else = 0;
- check_type:
- if (type_code == 0) { /* we got eof */
- if (s_lab != e_lab || s_code != e_code
- || s_com != e_com) /* must dump end of line */
- dump_line();
- if (ps.tos > 1) /* check for balanced braces */
- diag(1, "Stuff missing from end of file.");
-
- if (verbose) {
- printf("There were %d output lines and %d comments\n",
- ps.out_lines, ps.out_coms);
- printf("(Lines with comments)/(Lines with code): %6.3f\n",
- (1.0 * ps.com_lines) / code_lines);
- }
- cleanup(ps.tos <= 1);
- }
- if (
- (type_code != comment) &&
- (type_code != newline) &&
- (type_code != preesc) &&
- (type_code != form_feed)) {
- if (force_nl && (type_code != semicolon) && (type_code != lbrace || !btype_2)) { /* we should force a
- * broken line here */
- if (verbose && !flushed_nl)
- diag(0, "Line broken");
- flushed_nl = false;
- dump_line();
- ps.want_blank = false; /* dont insert blank at line start */
- force_nl = false;
- }
- ps.in_stmt = true; /* turn on flag which causes an extra level
- * of indentation. this is turned off by a ;
- * or '}' */
- if (s_com != e_com) { /* the turkey has embedded a comment
- * in a line. fix it */
- *e_code++ = ' ';
- for (t_ptr = s_com; *t_ptr; ++t_ptr)
- *e_code++ = *t_ptr;
- *e_code++ = ' ';
- *e_code = '\0'; /* null terminate code sect */
- ps.want_blank = false;
- e_com = s_com;
- }
- } else if (type_code != comment) /* preserve force_nl thru a
- * comment */
- force_nl = false;
-
- /* cancel forced newline after newline, form feed, etc */
-
- switch_on(type_code);
-
- *e_code = '\0'; /* make sure code section is null terminated */
- if (type_code != comment && type_code != newline && type_code != preesc)
- ps.last_token = type_code;
- } /* end of main for(;;) loop */
- }
-
- void dosomething()
- {
- register char *p = buf_ptr;
- register col = 1;
-
- for (;;) {
- if (*p == ' ')
- col++;
- else if (*p == '\t')
- #if 0
- col = ((col - 1) & tabmask) + 9;
- #else
- col += tabsize - (col % tabsize) + 1;
- #endif
- else
- break;
- p++;
- }
- if (col > ps.ind_size)
- ps.ind_level = ps.i_l_follow = col / ps.ind_size;
- }
- /* clean up procedure */
- void cleanup(ret)
- int ret;
- {
- if (output != NULL) {
- fflush(output);
- fclose(output);
- }
- if (input != NULL) {
- fclose(input);
- }
- #ifdef BUFFERING
- if (inbuf != NULL) {
- free(inbuf);
- }
- if (outbuf != NULL) {
- free(outbuf);
- }
- #endif
- exit(ret);
- }
-
- /* copy input file to backup file. If in_name is /blah/blah/blah/file.foo,
- * then backup file will be "file.BAK". Then make the backup file the input
- * and original input file the output. */
- void bakcopy()
- {
- int n;
- FILE *bakchn;
- char extsave[16]; /* MS DOS extension */
- register char *p;
- char *r;
-
- while ((p = strchr(in_name, '\\')) != NULL) {
- /* copy from `\' to end */
- p++;
- in_name = p;
- }
- p = in_name;
-
- /* wack off stuff after `.' */
- if ((r = strchr(p, '.')) != NULL) {
- strcpy(extsave, (r + 1));
- *r = NIL; /* terminate string there */
- }
- sprintf(bakfile, "%s.BAK", p);
-
- /* restore original in_name */
- sprintf(in_name, "%s.%s", in_name, extsave);
-
- /* copy in_name to backup file */
- if ((bakchn = fopen(bakfile, "w")) == NULL) {
- fprintf(stderr, "indent: can't create backup file \"%s\"\n", bakfile);
- exit(1);
- }
- /* copy input file to backup file */
- while ((n = getc(input)) != EOF)
- putc(n, bakchn);
-
- if ((n = fclose(bakchn)) == EOF) {
- fprintf(stderr, "indent: error closeing backup file\n");
- exit(1);
- }
- if ((n = fclose(input)) == EOF) {
- fprintf(stderr, "indent: error closeing input file\n");
- exit(1);
- }
- /* re-open backup file as the input file */
- if ((input = fopen(bakfile, "r")) == NULL) {
- fprintf(stderr, "indent: can't re-open backup file\n");
- exit(1);
- }
- /* now the original input file will be the output */
- output = fopen(in_name, "w");
- if (output == NULL) {
- fprintf(stderr, "indent: can't create %s\n", in_name);
- unlink(bakfile);
- exit(1);
- }
- }
-