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- /*
- HEADER: CUG236;
- TITLE: C Source Formatter;
- DATE: 04/04/1987;
- DESCRIPTION: "Formats a C source program with proper indents for
- each statement.";
- VERSION: 2.1;
- KEYWORDS: Pretty Printer;
- FILENAME: CB.C;
- SEE-ALSO: CB.DOC;
- COMPILERS: vanilla;
- AUTHORS: W. C. Colley III, J. W. Kindschi Jr.;
- */
-
- /*
- Modified for Portable C
- by: William C. Colley, III (4 APR 1987)
-
- Modified for Lattice C Ver 1.01
- by: John W. Kindschi Jr. (10-30-83)
-
- Swiped from CPIG'S UNIX system and modified to
- run under BDS C by William C. Colley, III
-
-
- To use the program type the following command line:
-
- A>cb input.fil [output.fil]
-
- Where input.fil is the file to be pretty printed and [output.fil]
- is the destination file. If no output file is specified, then
- the output goes to standard output.
- */
-
- #include <stdio.h>
-
- /*
- * Portability Note: The AZTEC C compilers handle the binary/text file
- * dichotomy differently from most other compilers. Uncomment the following
- * pair of #defines if you are running AZTEC C:
- */
-
- /*
- #define getc(f) agetc(f)
- #define putc(c,f) aputc(c,f)
- */
-
- char cc, lchar, pchar, string[200];
- char *wif[] = { "if", NULL };
- char *welse[] = { "else", NULL };
- char *wfor[] = { "for", NULL };
- char *wds[] = { "case", "default", NULL };
-
- int clevel, ct, iflev, ind[10], level, paren, sifflg[10], siflev[10];
- int sind[20][10], slevel[10], spflg[20][10], stabs[20][10];
- int aflg, bflg, eflg, ifflg = -1, pflg[10], qflg, sflg = 1;
- int c, j, lastchar, peek = -1, tabs;
- FILE *f1, *f2 = stdout;
-
- void comment(), gotelse(), ptabs(), put_str();
-
- int main(argc,argv)
- int argc;
- char *argv[];
- {
- int getchr(), get_nl(), get_str(), lookup();
-
- /* Initialize everything here */
-
- if (argc < 2 || argc > 3) {
- fprintf(stderr,"Usage: CB input.fil { output.fil }\n"); return !0;
- }
- if (!(f1 = fopen(*++argv,"r"))) {
- fprintf(stderr,"ERROR: Cannot find file %s\n",*argv); return !0;
- }
- if (argc == 3 && !(f2 = fopen(*++argv,"w"))) {
- fprintf(stderr,"ERROR: Cannot create file %s\n",*argv); return !0;
- }
-
- /* End of Initialization */
-
- while ((c = getchr()) != EOF) {
- switch (c) {
- default: string[j++] = c;
- if (c != ',') lchar = c;
- break;
-
- case ' ':
- case '\t': if (lookup(welse) == 1) {
- gotelse();
- if (sflg == 0 || j > 0) string[j++] = c;
- put_str(); sflg = 0; break;
- }
- if (sflg == 0 || j > 0) string[j++] = c;
- break;
-
- case '\n': if (eflg = lookup(welse) == 1) gotelse();
- put_str(); fprintf(f2,"\n"); sflg = 1;
- if (eflg == 1) { pflg[level]++; tabs++; }
- else if(pchar == lchar) aflg = 1;
- break;
-
- case '{': if (lookup(welse) == 1) gotelse();
- siflev[clevel] = iflev; sifflg[clevel] = ifflg;
- iflev = ifflg = 0; clevel++;
- if (sflg == 1 && pflg[level] != 0) {
- pflg[level]--; tabs--;
- }
- string[j++] = c; put_str(); get_nl(); put_str();
- fprintf(f2,"\n"); tabs++; sflg = 1;
- if (pflg[level] > 0) {
- ind[level] = 1; level++; slevel[level] = clevel;
- }
- break;
-
- case '}': clevel--;
- if ((iflev = siflev[clevel]-1) < 0) iflev = 0;
- ifflg = sifflg[clevel]; put_str(); tabs--; ptabs();
- if ((peek = getchr()) == ';') {
- fprintf(f2,"%c;",c); peek = -1;
- }
- else fprintf(f2,"%c",c);
- get_nl(); put_str(); fprintf(f2,"\n"); sflg = 1;
- if (clevel < slevel[level] && level > 0) level--;
- if (ind[level] != 0) {
- tabs -= pflg[level]; pflg[level] = ind[level] = 0;
- }
- break;
-
- case '"':
- case '\'': string[j++] = c;
- while ((cc = getchr()) != c) {
- string[j++] = cc;
- if (cc == '\\') string[j++] = getchr();
- if (cc == '\n') { put_str(); sflg = 1; }
- }
- string[j++] = cc;
- if (get_nl() == 1) { lchar = cc; peek = '\n'; }
- break;
-
- case ';': string[j++] = c; put_str();
- if (pflg[level] > 0 && ind[level] == 0) {
- tabs -= pflg[level]; pflg[level] = 0;
- }
- get_nl(); put_str(); fprintf(f2,"\n"); sflg = 1;
- if(iflev > 0 && ifflg == 1){ iflev--; ifflg = 0; }
- else iflev = 0;
- break;
-
- case '\\': string[j++] = c; string[j++] = getchr(); break;
-
- case '?': qflg = 1; string[j++] = c; break;
-
- case ':': string[j++] = c;
- if (qflg == 1) { qflg = 0; break; }
- if (!lookup(wds)) { sflg = 0; put_str(); }
- else { tabs--; put_str(); tabs++; }
- if ((peek = getchr()) == ';') {
- fprintf(f2,";"); peek = -1;
- }
- get_nl(); put_str(); fprintf(f2,"\n"); sflg = 1;
- break;
-
- case '/': string[j++] = c;
- if ((peek = getchr()) != '*') break;
- string[j++] = peek; peek = -1; comment(); break;
-
- case ')': paren--; string[j++] = c; put_str();
- if (get_nl() == 1) {
- peek = '\n';
- if (paren != 0) aflg = 1;
- else if (tabs > 0) {
- pflg[level]++; tabs++; ind[level] = 0;
- }
- }
- break;
-
- case '#': string[j++] = c;
- while ((cc = getchr()) != '\n') string[j++] = cc;
- string[j++] = cc; sflg = 0; put_str(); sflg = 1;
- break;
-
- case '(': string[j++] = c; paren++;
- if (lookup(wfor) == 1) {
- while ((c = get_str()) != ';');
- ct = 0;
- cont: while ((c = get_str()) != ')')
- if(c == '(') ct++;
- if (ct != 0) { ct--; goto cont; }
- paren--; put_str();
- if (get_nl() == 1) {
- peek = '\n'; pflg[level]++;
- tabs++; ind[level] = 0;
- }
- break;
- }
- if (lookup(wif) == 1) {
- put_str();
- stabs[clevel][iflev] = tabs;
- spflg[clevel][iflev] = pflg[level];
- sind[clevel][iflev] = ind[level];
- iflev++; ifflg = 1;
- }
- }
- }
- if (f2 != stdout && (ferror(f2) || fclose(f2))) {
- fprintf(stderr,"ERROR: Disk full\n"); return !0;
- }
- fclose(f1); return 0;
- }
-
- void ptabs()
- {
- int i;
-
- for (i=0; i < tabs; i++) fprintf(f2,"\t");
- }
-
- int getchr()
- {
- if (peek < 0 && lastchar != ' ' && lastchar != '\t') pchar = lastchar;
- lastchar = (peek < 0) ? getc(f1) : peek; peek = -1;
- return lastchar;
- }
-
- void put_str()
- {
- if (j > 0) {
- if (sflg != 0) {
- ptabs(); sflg = 0;
- if (aflg == 1) {
- aflg = 0;
- if (tabs > 0) fprintf(f2," ");
- }
- }
- string[j] = '\0'; fprintf(f2,"%s",string); j = 0;
- }
- else if (sflg != 0) { sflg = 0; aflg = 0; }
- }
-
- int lookup(tab)
- char *tab[];
- {
- char r;
- int i,kk,k,l;
-
- if (j < 1) return 0;
- for (kk = 0; string[kk] == ' '; ++kk);
- for (i = 0; tab[i] != 0; i++) {
- l = 0;
- for (k=kk; (r = tab[i][l++]) == string[k] && r != '\0'; ++k);
- if (r == '\0' && (string[k] < 'a' || string[k] > 'z')) return 1;
- }
- return 0;
- }
-
- int get_str()
- {
- char ch;
-
- beg:
- if ((ch = string[j++] = getchr()) == '\\') {
- string[j++] = getchr(); goto beg;
- }
- if (ch == '\'' || ch == '"') {
- while ((cc = string[j++] = getchr()) != ch)
- if (cc == '\\') string[j++] = getchr();
- goto beg;
- }
- if (ch == '\n') { put_str(); aflg = 1; goto beg; }
- else return ch;
- }
-
- void gotelse()
- {
- tabs = stabs[clevel][iflev]; pflg[level] = spflg[clevel][iflev];
- ind[level] = sind[clevel][iflev]; ifflg = 1;
- }
-
- int get_nl()
- {
- while ((peek = getchr()) == '\t' || peek == ' ') {
- string[j++] = peek; peek = -1;
- }
- if ((peek = getchr()) == '/') {
- peek = -1;
- if ((peek = getchr()) == '*') {
- string[j++] = '/'; string[j++] = '*';
- peek = -1; comment();
- }
- else string[j++] = '/';
- }
- if ((peek = getchr()) == '\n') { peek = -1; return 1; }
- return 0;
- }
-
- void comment()
- {
- rep:
- while ((c = string[j++] = getchr()) != '*')
- if (c == '\n') { put_str(); sflg = 1; }
- gotstar:
- if ((c = string[j++] = getchr()) != '/') {
- if (c == '*') goto gotstar;
- goto rep;
- }
- }
-