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1.1 root 1: /*% cyntax % && cc -go # %
2: * block up paragraphs, possibly with indentation
3: */
4: #include <libc.h>
5: #include <stdio.h>
6: int indent=0; /* how many spaces to indent */
7: int length=70; /* how many columns per output line */
8: main(argc, argv)
9: char *argv[];
10: {
11: register i;
12: register FILE *f;
13: for(i=1;i!=argc && argv[i][0]=='-';i++){
14: switch(argv[i][1]){
15: case 'i':
16: if(argv[i][2])
17: indent=atoi(argv[i]+2);
18: else if(i+1<argc){
19: indent=atoi(argv[i+1]);
20: i++;
21: }
22: else
23: goto Usage;
24: break;
25: case 'w':
26: case 'l':
27: if(argv[i][2])
28: length=atoi(argv[i]+2);
29: else if(i+1<argc){
30: length=atoi(argv[i+1]);
31: i++;
32: }
33: else
34: goto Usage;
35: break;
36: default:
37: Usage:
38: fprintf(stderr,
39: "Usage: %s [-i number] [-l number] [file ...]\n",
40: argv[0]);
41: exit(1);
42: }
43: }
44: if(length<=indent){
45: fprintf(stderr, "%s: line length<=indentation\n", argv[0]);
46: exit(1);
47: }
48: if(i==argc)
49: fmt(stdin);
50: else{
51: for(;i!=argc;i++){
52: f=fopen(argv[i], "r");
53: if(f==0)
54: perror(argv[i]);
55: else{
56: fmt(f);
57: fclose(f);
58: if(i!=argc-1)
59: putchar('\n');
60: }
61: }
62: }
63: exit(0);
64: }
65: fmt(f)
66: register FILE *f;
67: {
68: register c;
69: while((c=getc(f))!=EOF)
70: outchar(c);
71: flush();
72: }
73: #define TAB 8
74: #define NWORD (TAB*32)
75: char word[NWORD+1];
76: char *wp=word;
77: int col=0; /* output column number */
78: int bol=1; /* at beginning of output line? */
79: int punct=0; /* last character out was punctuation? */
80: int newline=1; /* last char read was newline(1) or init space(2) */
81: outchar(c){
82: switch(c){
83: case '\0':
84: break;
85: case '\n':
86: switch(newline){
87: case 0:
88: outword();
89: break;
90: case 1:
91: flush();
92: case 2:
93: putchar('\n');
94: wp=word;
95: }
96: newline=1;
97: break;
98: case ' ':
99: case '\t':
100: switch(newline) {
101: case 0:
102: outword();
103: break;
104: case 1:
105: flush();
106: newline=2;
107: case 2:
108: do {
109: addchar(' ');
110: } while(c=='\t' && (wp-word)%TAB);
111: }
112: break;
113: default:
114: addchar(c);
115: newline=0;
116: }
117: }
118: addchar(c)
119: {
120: if(wp==&word[NWORD]) {
121: if(strchr(" \t",wp[-1]))
122: wp=word;
123: outword();
124: }
125: *wp++=c;
126: }
127: outword(){
128: register i;
129: if(wp==word)
130: return;
131: if(wp-word+col+(bol?0:punct?2:1)>length){
132: putchar('\n');
133: col=0;
134: bol=1;
135: }
136: if(col==0){
137: for(i=0;i+8<=indent;i+=8)
138: putchar('\t');
139: while(i++<indent)
140: putchar(' ');
141: col=indent;
142: }
143: if(bol)
144: bol=0;
145: else{
146: if(punct)
147: putchar(' ');
148: putchar(' ');
149: col++;
150: }
151: *wp='\0';
152: punct=strchr(".?:!", wp[wp[-1]==')'?-2:-1])!=0 && wp-word>2;
153: printf("%s", word);
154: col+=wp-word;
155: wp=word;
156: }
157: flush(){
158: outword();
159: if(col!=0){
160: putchar('\n');
161: col=0;
162: bol=1;
163: }
164: }
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