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1.1 root 1: #ifndef lint
2: static char sccsid[] = "@(#)lib.c 4.6 (Berkeley) 10/6/87";
3: #endif
4:
5: #include "stdio.h"
6: #include "awk.def"
7: #include "awk.h"
8: #include "ctype.h"
9:
10: extern FILE *yyin; /* lex input file */
11: FILE *infile = NULL;
12: char *file;
13: #define RECSIZE (5 * 512)
14: char record[RECSIZE];
15: char fields[RECSIZE];
16: char EMPTY[] = "";
17:
18: #define MAXFLD 100
19: int donefld; /* 1 = implies rec broken into fields */
20: int donerec; /* 1 = record is valid (no flds have changed) */
21: int mustfld; /* 1 = NF seen, so always break*/
22:
23: #define FINIT {EMPTY, EMPTY, 0.0, FLD|STR}
24: cell fldtab[MAXFLD] = { /*room for fields */
25: { "$record", record, 0.0, STR|FLD},
26: FINIT, FINIT, FINIT, FINIT, FINIT, FINIT, FINIT, FINIT, FINIT,
27: FINIT, FINIT, FINIT, FINIT, FINIT, FINIT, FINIT, FINIT, FINIT,
28: FINIT, FINIT, FINIT, FINIT, FINIT, FINIT, FINIT, FINIT, FINIT,
29: FINIT, FINIT, FINIT, FINIT, FINIT, FINIT, FINIT, FINIT, FINIT,
30: FINIT, FINIT, FINIT, FINIT, FINIT, FINIT, FINIT, FINIT, FINIT,
31: FINIT, FINIT, FINIT, FINIT, FINIT, FINIT, FINIT, FINIT, FINIT,
32: FINIT, FINIT, FINIT, FINIT, FINIT, FINIT, FINIT, FINIT, FINIT,
33: FINIT, FINIT, FINIT, FINIT, FINIT, FINIT, FINIT, FINIT, FINIT,
34: FINIT, FINIT, FINIT, FINIT, FINIT, FINIT, FINIT, FINIT, FINIT,
35: };
36: int maxfld = 0; /* last used field */
37:
38:
39: getrec()
40: {
41: register char *rr;
42: extern int svargc;
43: extern char **svargv;
44: register c, sep;
45:
46: dprintf("**RS=%o, **FS=%o\n", **RS, **FS, NULL);
47: donefld = 0;
48: donerec = 1;
49: record[0] = 0;
50: while (svargc > 0) {
51: dprintf("svargc=%d, *svargv=%s\n", svargc, *svargv, NULL);
52: if (infile == NULL) { /* have to open a new file */
53: if (member('=', *svargv)) { /* it's a var=value argument */
54: setclvar(*svargv);
55: svargv++;
56: svargc--;
57: continue;
58: }
59: *FILENAME = file = *svargv;
60: dprintf("opening file %s\n", file, NULL, NULL);
61: if (*file == '-') {
62: if (yyin == stdin)
63: error(FATAL, "standard input already used for reading commands");
64: else
65: infile = stdin;
66: }
67: else if ((infile = fopen(file, "r")) == NULL)
68: error(FATAL, "can't open %s", file);
69: }
70: if ((sep = **RS) == 0)
71: sep = '\n';
72: for (rr = record; ; ) {
73: for (; (c=getc(infile)) != sep && c != EOF; *rr++ = c)
74: ;
75: if (**RS == sep || c == EOF)
76: break;
77: if ((c = getc(infile)) == '\n' || c == EOF) /* 2 in a row */
78: break;
79: *rr++ = '\n';
80: *rr++ = c;
81: }
82: if (rr > record+RECSIZE)
83: error(FATAL, "record `%.20s...' too long", record);
84: *rr = 0;
85: if (mustfld)
86: fldbld();
87: if (c != EOF || rr > record) { /* normal record */
88: recloc->tval &= ~NUM;
89: recloc->tval |= STR;
90: ++nrloc->fval;
91: nrloc->tval &= ~STR;
92: nrloc->tval |= NUM;
93: return(1);
94: }
95: /* EOF arrived on this file; set up next */
96: if (infile != stdin)
97: fclose(infile);
98: infile = NULL;
99: svargc--;
100: svargv++;
101: }
102: return(0); /* true end of file */
103: }
104:
105: setclvar(s) /* set var=value from s */
106: char *s;
107: {
108: char *p;
109: cell *q;
110:
111: for (p=s; *p != '='; p++)
112: ;
113: *p++ = 0;
114: q = setsymtab(s, tostring(p), 0.0, STR, symtab);
115: setsval(q, p);
116: dprintf("command line set %s to |%s|\n", s, p, NULL);
117: }
118:
119: fldbld()
120: {
121: register char *r, *fr, sep;
122: int i, j;
123:
124: r = record;
125: fr = fields;
126: i = 0; /* number of fields accumulated here */
127: if ((sep = **FS) == ' ')
128: for (i = 0; ; ) {
129: while (*r == ' ' || *r == '\t' || *r == '\n')
130: r++;
131: if (*r == 0)
132: break;
133: i++;
134: if (i >= MAXFLD)
135: error(FATAL, "record `%.20s...' has too many fields", record);
136: if (!(fldtab[i].tval&FLD))
137: strfree(fldtab[i].sval);
138: fldtab[i].sval = fr;
139: fldtab[i].tval = FLD | STR;
140: do
141: *fr++ = *r++;
142: while (*r != ' ' && *r != '\t' && *r != '\n' && *r != '\0');
143: *fr++ = 0;
144: }
145: else if (*r != 0) /* if 0, it's a null field */
146: for (;;) {
147: i++;
148: if (i >= MAXFLD)
149: error(FATAL, "record `%.20s...' has too many fields", record);
150: if (!(fldtab[i].tval&FLD))
151: strfree(fldtab[i].sval);
152: fldtab[i].sval = fr;
153: fldtab[i].tval = FLD | STR;
154: while (*r != sep && *r != '\n' && *r != '\0') /* \n always a separator */
155: *fr++ = *r++;
156: *fr++ = 0;
157: if (*r++ == 0)
158: break;
159: }
160: *fr = 0;
161: for (j=MAXFLD-1; j>i; j--) { /* clean out junk from previous record */
162: if (!(fldtab[j].tval&FLD))
163: strfree(fldtab[j].sval);
164: fldtab[j].tval = STR | FLD;
165: fldtab[j].sval = EMPTY;
166: }
167: maxfld = i;
168: donefld = 1;
169: for(i=1; i<=maxfld; i++)
170: if(isnumber(fldtab[i].sval)) {
171: fldtab[i].fval = atof(fldtab[i].sval);
172: fldtab[i].tval |= NUM;
173: }
174: setfval(lookup("NF", symtab, 0), (awkfloat) maxfld);
175: if (dbg)
176: for (i = 0; i <= maxfld; i++)
177: printf("field %d: |%s|\n", i, fldtab[i].sval);
178: }
179:
180: recbld()
181: {
182: int i;
183: register char *r, *p;
184:
185: if (donefld == 0 || donerec == 1)
186: return;
187: r = record;
188: for (i = 1; i <= *NF; i++) {
189: p = getsval(&fldtab[i]);
190: while (*r++ = *p++)
191: ;
192: *(r-1) = **OFS;
193: }
194: *(r-1) = '\0';
195: dprintf("in recbld FS=%o, recloc=%o\n", **FS, recloc, NULL);
196: recloc->tval = STR | FLD;
197: dprintf("in recbld FS=%o, recloc=%o\n", **FS, recloc, NULL);
198: if (r > record+RECSIZE)
199: error(FATAL, "built giant record `%.20s...'", record);
200: dprintf("recbld = |%s|\n", record, NULL, NULL);
201: }
202:
203: cell *fieldadr(n)
204: {
205: if (n >= MAXFLD)
206: error(FATAL, "trying to access field %d", n);
207: return(&fldtab[n]);
208: }
209:
210: int errorflag = 0;
211:
212: yyerror(s) char *s; {
213: fprintf(stderr, "awk: %s near line %d\n", s, lineno);
214: errorflag = 2;
215: }
216:
217: error(f, s, a1, a2, a3, a4, a5, a6, a7) {
218: fprintf(stderr, "awk: ");
219: fprintf(stderr, s, a1, a2, a3, a4, a5, a6, a7);
220: fprintf(stderr, "\n");
221: if (NR && *NR > 0)
222: fprintf(stderr, " record number %g\n", *NR);
223: if (f)
224: exit(2);
225: }
226:
227: PUTS(s) char *s; {
228: dprintf("%s\n", s, NULL, NULL);
229: }
230:
231: #define MAXEXPON 38 /* maximum exponenet for fp number */
232:
233: isnumber(s)
234: register char *s;
235: {
236: register d1, d2;
237: int point;
238: char *es;
239:
240: if (s == NULL)
241: return (0);
242: d1 = d2 = point = 0;
243: while (*s == ' ' || *s == '\t' || *s == '\n')
244: s++;
245: if (*s == '\0')
246: return(0); /* empty stuff isn't number */
247: if (*s == '+' || *s == '-')
248: s++;
249: if (!isdigit(*s) && *s != '.')
250: return(0);
251: if (isdigit(*s)) {
252: do {
253: d1++;
254: s++;
255: } while (isdigit(*s));
256: }
257: if(d1 >= MAXEXPON)
258: return(0); /* too many digits to convert */
259: if (*s == '.') {
260: point++;
261: s++;
262: }
263: if (isdigit(*s)) {
264: d2++;
265: do {
266: s++;
267: } while (isdigit(*s));
268: }
269: if (!(d1 || point && d2))
270: return(0);
271: if (*s == 'e' || *s == 'E') {
272: s++;
273: if (*s == '+' || *s == '-')
274: s++;
275: if (!isdigit(*s))
276: return(0);
277: es = s;
278: do {
279: s++;
280: } while (isdigit(*s));
281: if (s - es > 2)
282: return(0);
283: else if (s - es == 2 && 10 * (*es-'0') + *(es+1)-'0' >= MAXEXPON)
284: return(0);
285: }
286: while (*s == ' ' || *s == '\t' || *s == '\n')
287: s++;
288: if (*s == '\0')
289: return(1);
290: else
291: return(0);
292: }
293: /*
294: isnumber(s) char *s; {return(0);}
295: */
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