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#ifndef lint |
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static const char RCSid[] = "$Id: lam.c,v 1.27 2025/02/06 19:52:05 greg Exp $"; |
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#endif |
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/* |
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* lam.c - simple program to laminate files. |
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* |
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* 7/14/88 Greg Ward |
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*/ |
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|
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#include <ctype.h> |
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|
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#include "rtio.h" |
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#include "platform.h" |
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#include "paths.h" |
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|
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#ifndef MAXLINE |
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#define MAXLINE (1L<<20) /* maximum input line per stream */ |
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#endif |
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|
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struct instream { /* structure to hold input stream info */ |
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FILE *input; /* input stream */ |
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int bytsiz; /* bytes/component if binary */ |
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char *tabc; /* data separation string */ |
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} *rifile = NULL; |
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|
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int nfiles = 0; |
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|
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char buf[MAXLINE]; |
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|
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int |
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main(int argc, char *argv[]) |
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{ |
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long incnt = 0; |
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int unbuff = 0; |
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int binout = 0; |
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char *curtab = "\t"; |
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int curbytes = 0; |
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int puteol; |
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int i; |
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|
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rifile = (struct instream *)calloc(argc-1, sizeof(struct instream)); |
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if (!rifile) { |
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fputs(argv[0], stderr); |
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fputs(": not enough memory\n", stderr); |
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return(1); |
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} |
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for (i = 1; i < argc; i++) { |
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if (argv[i][0] == '-') { |
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switch (argv[i][1]) { |
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case 't': |
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curtab = argv[i]+2; |
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if (!*curtab) curtab = "\n"; |
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continue; |
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case 'u': |
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unbuff = !unbuff; |
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continue; |
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case 'i': |
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switch (argv[i][2]) { |
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case 'n': |
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incnt = atol(argv[++i]); |
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continue; |
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case 'f': |
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case 'F': |
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curbytes = sizeof(float); |
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break; |
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case 'd': |
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case 'D': |
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curbytes = sizeof(double); |
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break; |
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case 'i': |
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case 'I': |
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curbytes = sizeof(int); |
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break; |
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case 'w': |
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case 'W': |
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curbytes = 2; |
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break; |
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case 'b': |
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curbytes = 1; |
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break; |
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case 'a': |
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curbytes = argv[i][3] ? -1 : 0; |
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break; |
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default: |
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goto badopt; |
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} |
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if (isdigit(argv[i][3])) |
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curbytes *= atoi(argv[i]+3); |
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curbytes += (curbytes == -1); |
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if (curbytes > MAXLINE) { |
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fputs(argv[0], stderr); |
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fputs(": input size too big\n", stderr); |
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return(1); |
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} |
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if (curbytes > 0) { |
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curtab = ""; |
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++binout; |
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} |
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continue; |
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case '\0': |
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rifile[nfiles].tabc = curtab; |
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rifile[nfiles].input = stdin; |
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if (curbytes > 0) |
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SET_FILE_BINARY(rifile[nfiles].input); |
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rifile[nfiles++].bytsiz = curbytes; |
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continue; |
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badopt:; |
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default: |
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fputs(argv[0], stderr); |
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fputs(": unknown option '", stderr); |
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fputs(argv[i], stderr); |
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fputs("'\n", stderr); |
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return(1); |
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} |
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} |
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if (argv[i][0] == '!') { |
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rifile[nfiles].tabc = curtab; |
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if ((rifile[nfiles].input = popen(argv[i]+1, "r")) == NULL) { |
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fputs(argv[i], stderr); |
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fputs(": cannot start command\n", stderr); |
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return(1); |
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} |
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if (curbytes > 0) |
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SET_FILE_BINARY(rifile[nfiles].input); |
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rifile[nfiles++].bytsiz = curbytes; |
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} else { |
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rifile[nfiles].tabc = curtab; |
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if ((rifile[nfiles].input = fopen(argv[i], "r")) == NULL) { |
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fputs(argv[i], stderr); |
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fputs(": cannot open file\n", stderr); |
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return(1); |
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} |
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if (curbytes > 0) |
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SET_FILE_BINARY(rifile[nfiles].input); |
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rifile[nfiles++].bytsiz = curbytes; |
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} |
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} |
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if (!nfiles) { |
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fputs(argv[0], stderr); |
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fputs(": no input streams\n", stderr); |
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return(1); |
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} /* reduce array to size we need */ |
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rifile = (struct instream *)realloc(rifile, nfiles*sizeof(struct instream)); |
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if (!rifile) { |
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fputs(argv[0], stderr); |
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fputs(": realloc() failed!\n", stderr); |
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return(1); |
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} |
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if (binout) /* binary output? */ |
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SET_FILE_BINARY(stdout); |
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#ifdef getc_unlocked /* avoid lock/unlock overhead */ |
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for (i = nfiles; i--; ) |
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flockfile(rifile[i].input); |
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flockfile(stdout); |
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#endif |
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puteol = 0; /* any ASCII output at all? */ |
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for (i = nfiles; i--; ) |
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puteol += (rifile[i].bytsiz <= 0); |
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do { /* main loop */ |
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for (i = 0; i < nfiles; i++) { |
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if (rifile[i].bytsiz > 0) { /* binary input */ |
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if (getbinary(buf, rifile[i].bytsiz, 1, rifile[i].input) < 1) |
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break; |
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if (putbinary(buf, rifile[i].bytsiz, 1, stdout) != 1) |
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break; |
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} else if (rifile[i].bytsiz < 0) { /* multi-line input */ |
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int n = -rifile[i].bytsiz; |
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while (n--) { |
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if (fgets(buf, MAXLINE, rifile[i].input) == NULL) |
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break; |
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if ((i > 0) | (n < -rifile[i].bytsiz-1)) |
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fputs(rifile[i].tabc, stdout); |
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buf[strlen(buf)-1] = '\0'; |
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if (fputs(buf, stdout) == EOF) |
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break; |
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} |
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if (n >= 0) /* fell short? */ |
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break; |
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} else { /* single-line input */ |
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if (fgets(buf, MAXLINE, rifile[i].input) == NULL) |
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break; |
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if (i) |
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fputs(rifile[i].tabc, stdout); |
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buf[strlen(buf)-1] = '\0'; |
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if (fputs(buf, stdout) == EOF) |
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break; |
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} |
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} |
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if (i < nfiles) |
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break; |
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if (puteol) |
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putchar('\n'); |
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if (unbuff) |
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fflush(stdout); |
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} while (--incnt); |
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/* check ending */ |
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if (fflush(stdout) == EOF) { |
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fputs(argv[0], stderr); |
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fputs(": write error on standard output\n", stderr); |
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return(1); |
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} |
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if (incnt > 0) { |
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fputs(argv[0], stderr); |
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fputs(": warning: premature EOD\n", stderr); |
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} |
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return(0); |
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} |
