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-rw-r--r--src/cmd/9sed.c1447
1 files changed, 0 insertions, 1447 deletions
diff --git a/src/cmd/9sed.c b/src/cmd/9sed.c
deleted file mode 100644
index 182163eb..00000000
--- a/src/cmd/9sed.c
+++ /dev/null
@@ -1,1447 +0,0 @@
-/*
- * sed -- stream editor
- *
- *
- */
-#include <u.h>
-#include <libc.h>
-#include <bio.h>
-#include <regexp.h>
-
-enum {
- DEPTH = 20, /* max nesting depth of {} */
- MAXCMDS = 512, /* max sed commands */
- ADDSIZE = 10000, /* size of add & read buffer */
- MAXADDS = 20, /* max pending adds and reads */
- LBSIZE = 8192, /* input line size */
- LABSIZE = 50, /* max label name size */
- MAXSUB = 10, /* max number of sub reg exp */
- MAXFILES = 120, /* max output files */
-};
- /* An address is a line #, a R.E., "$", a reference to the last
- * R.E., or nothing.
- */
-typedef struct {
- enum {
- A_NONE,
- A_DOL,
- A_LINE,
- A_RE,
- A_LAST,
- }type;
- union {
- long line; /* Line # */
- Reprog *rp; /* Compiled R.E. */
- } u;
-} Addr;
-
-typedef struct SEDCOM {
- Addr ad1; /* optional start address */
- Addr ad2; /* optional end address */
- union {
- Reprog *re1; /* compiled R.E. */
- Rune *text; /* added text or file name */
- struct SEDCOM *lb1; /* destination command of branch */
- } u;
- Rune *rhs; /* Right-hand side of substitution */
- Biobuf* fcode; /* File ID for read and write */
- char command; /* command code -see below */
- char gfl; /* 'Global' flag for substitutions */
- char pfl; /* 'print' flag for substitutions */
- char active; /* 1 => data between start and end */
- char negfl; /* negation flag */
-} SedCom;
-
- /* Command Codes for field SedCom.command */
-#define ACOM 01
-#define BCOM 020
-#define CCOM 02
-#define CDCOM 025
-#define CNCOM 022
-#define COCOM 017
-#define CPCOM 023
-#define DCOM 03
-#define ECOM 015
-#define EQCOM 013
-#define FCOM 016
-#define GCOM 027
-#define CGCOM 030
-#define HCOM 031
-#define CHCOM 032
-#define ICOM 04
-#define LCOM 05
-#define NCOM 012
-#define PCOM 010
-#define QCOM 011
-#define RCOM 06
-#define SCOM 07
-#define TCOM 021
-#define WCOM 014
-#define CWCOM 024
-#define YCOM 026
-#define XCOM 033
-
-
-typedef struct label { /* Label symbol table */
- Rune asc[9]; /* Label name */
- SedCom *chain;
- SedCom *address; /* Command associated with label */
-} Label;
-
-typedef struct FILE_CACHE { /* Data file control block */
- struct FILE_CACHE *next; /* Forward Link */
- char *name; /* Name of file */
-} FileCache;
-
-SedCom pspace[MAXCMDS]; /* Command storage */
-SedCom *pend = pspace+MAXCMDS; /* End of command storage */
-SedCom *rep = pspace; /* Current fill point */
-
-Reprog *lastre = 0; /* Last regular expression */
-Resub subexp[MAXSUB]; /* sub-patterns of pattern match*/
-
-Rune addspace[ADDSIZE]; /* Buffer for a, c, & i commands */
-Rune *addend = addspace+ADDSIZE;
-
-SedCom *abuf[MAXADDS]; /* Queue of pending adds & reads */
-SedCom **aptr = abuf;
-
-struct { /* Sed program input control block */
- enum PTYPE /* Either on command line or in file */
- { P_ARG,
- P_FILE
- } type;
- union PCTL { /* Pointer to data */
- Biobuf *bp;
- char *curr;
- } pctl;
-} prog;
-
-Rune genbuf[LBSIZE]; /* Miscellaneous buffer */
-
-FileCache *fhead = 0; /* Head of File Cache Chain */
-FileCache *ftail = 0; /* Tail of File Cache Chain */
-
-Rune *loc1; /* Start of pattern match */
-Rune *loc2; /* End of pattern match */
-Rune seof; /* Pattern delimiter char */
-
-Rune linebuf[LBSIZE+1]; /* Input data buffer */
-Rune *lbend = linebuf+LBSIZE; /* End of buffer */
-Rune *spend = linebuf; /* End of input data */
-Rune *cp; /* Current scan point in linebuf */
-
-Rune holdsp[LBSIZE+1]; /* Hold buffer */
-Rune *hend = holdsp+LBSIZE; /* End of hold buffer */
-Rune *hspend = holdsp; /* End of hold data */
-
-int nflag; /* Command line flags */
-int gflag;
-
-int dolflag; /* Set when at true EOF */
-int sflag; /* Set when substitution done */
-int jflag; /* Set when jump required */
-int delflag; /* Delete current line when set */
-
-long lnum = 0; /* Input line count */
-
-char fname[MAXFILES][40]; /* File name cache */
-Biobuf *fcode[MAXFILES]; /* File ID cache */
-int nfiles = 0; /* Cache fill point */
-
-Biobuf fout; /* Output stream */
-Biobuf bstdin; /* Default input */
-Biobuf* f = 0; /* Input data */
-
-Label ltab[LABSIZE]; /* Label name symbol table */
-Label *labend = ltab+LABSIZE; /* End of label table */
-Label *lab = ltab+1; /* Current Fill point */
-
-int depth = 0; /* {} stack pointer */
-
-Rune bad; /* Dummy err ptr reference */
-Rune *badp = &bad;
-
-
-char CGMES[] = "Command garbled: %S";
-char TMMES[] = "Too much text: %S";
-char LTL[] = "Label too long: %S";
-char AD0MES[] = "No addresses allowed: %S";
-char AD1MES[] = "Only one address allowed: %S";
-
-void address(Addr *);
-void arout(void);
-int cmp(char *, char *);
-int rcmp(Rune *, Rune *);
-void command(SedCom *);
-Reprog *compile(void);
-Rune *compsub(Rune *, Rune *);
-void dechain(void);
-void dosub(Rune *);
-int ecmp(Rune *, Rune *, int);
-void enroll(char *);
-void errexit(void);
-int executable(SedCom *);
-void execute(void);
-void fcomp(void);
-long getrune(void);
-Rune *gline(Rune *);
-int match(Reprog *, Rune *);
-void newfile(enum PTYPE, char *);
-int opendata(void);
-Biobuf *open_file(char *);
-Rune *place(Rune *, Rune *, Rune *);
-void quit(char *, char *);
-int rline(Rune *, Rune *);
-Label *search(Label *);
-int substitute(SedCom *);
-char *text(char *);
-Rune *stext(Rune *, Rune *);
-int ycomp(SedCom *);
-char * trans(int c);
-void putline(Biobuf *bp, Rune *buf, int n);
-
-void
-main(int argc, char **argv)
-{
- int compfl;
-
- lnum = 0;
- Binit(&fout, 1, OWRITE);
- fcode[nfiles++] = &fout;
- compfl = 0;
-
- if(argc == 1)
- exits(0);
- ARGBEGIN{
- case 'n':
- nflag++;
- continue;
- case 'f':
- if(argc <= 1)
- quit("no pattern-file", 0);
- newfile(P_FILE, ARGF());
- fcomp();
- compfl = 1;
- continue;
- case 'e':
- if (argc <= 1)
- quit("missing pattern", 0);
- newfile(P_ARG, ARGF());
- fcomp();
- compfl = 1;
- continue;
- case 'g':
- gflag++;
- continue;
- default:
- fprint(2, "sed: Unknown flag: %c\n", ARGC());
- continue;
- } ARGEND
-
- if(compfl == 0) {
- if (--argc < 0)
- quit("missing pattern", 0);
- newfile(P_ARG, *argv++);
- fcomp();
- }
-
- if(depth)
- quit("Too many {'s", 0);
-
- ltab[0].address = rep;
-
- dechain();
-
- if(argc <= 0)
- enroll(0); /* Add stdin to cache */
- else while(--argc >= 0) {
- enroll(*argv++);
- }
- execute();
- exits(0);
-}
-void
-fcomp(void)
-{
- Rune *tp;
- SedCom *pt, *pt1;
- int i;
- Label *lpt;
-
- static Rune *p = addspace;
- static SedCom **cmpend[DEPTH]; /* stack of {} operations */
-
- while (rline(linebuf, lbend) >= 0) {
- cp = linebuf;
-comploop:
- while(*cp == ' ' || *cp == '\t')
- cp++;
- if(*cp == '\0' || *cp == '#')
- continue;
- if(*cp == ';') {
- cp++;
- goto comploop;
- }
-
- address(&rep->ad1);
- if (rep->ad1.type != A_NONE) {
- if (rep->ad1.type == A_LAST) {
- if (!lastre)
- quit("First RE may not be null", 0);
- rep->ad1.type = A_RE;
- rep->ad1.u.rp = lastre;
- }
- if(*cp == ',' || *cp == ';') {
- cp++;
- address(&rep->ad2);
- if (rep->ad2.type == A_LAST) {
- rep->ad1.type = A_RE;
- rep->ad2.u.rp = lastre;
- }
- } else
- rep->ad2.type = A_NONE;
- }
- while(*cp == ' ' || *cp == '\t')
- cp++;
-
-swit:
- switch(*cp++) {
-
- default:
- quit("Unrecognized command: %S", (char *)linebuf);
-
- case '!':
- rep->negfl = 1;
- goto swit;
-
- case '{':
- rep->command = BCOM;
- rep->negfl = !(rep->negfl);
- cmpend[depth++] = &rep->u.lb1;
- if(++rep >= pend)
- quit("Too many commands: %S", (char *) linebuf);
- if(*cp == '\0') continue;
- goto comploop;
-
- case '}':
- if(rep->ad1.type != A_NONE)
- quit(AD0MES, (char *) linebuf);
- if(--depth < 0)
- quit("Too many }'s", 0);
- *cmpend[depth] = rep;
- if(*cp == 0) continue;
- goto comploop;
-
- case '=':
- rep->command = EQCOM;
- if(rep->ad2.type != A_NONE)
- quit(AD1MES, (char *) linebuf);
- break;
-
- case ':':
- if(rep->ad1.type != A_NONE)
- quit(AD0MES, (char *) linebuf);
-
- while(*cp == ' ')
- cp++;
- tp = lab->asc;
- while (*cp && *cp != ';' && *cp != ' ' && *cp != '\t' && *cp != '#') {
- *tp++ = *cp++;
- if(tp >= &(lab->asc[8]))
- quit(LTL, (char *) linebuf);
- }
- *tp = '\0';
-
- if(lpt = search(lab)) {
- if(lpt->address)
- quit("Duplicate labels: %S", (char *) linebuf);
- } else {
- lab->chain = 0;
- lpt = lab;
- if(++lab >= labend)
- quit("Too many labels: %S", (char *) linebuf);
- }
- lpt->address = rep;
- if (*cp == '#')
- continue;
- rep--; /* reuse this slot */
- break;
-
- case 'a':
- rep->command = ACOM;
- if(rep->ad2.type != A_NONE)
- quit(AD1MES, (char *) linebuf);
- if(*cp == '\\') cp++;
- if(*cp++ != '\n')
- quit(CGMES, (char *) linebuf);
- rep->u.text = p;
- p = stext(p, addend);
- break;
- case 'c':
- rep->command = CCOM;
- if(*cp == '\\') cp++;
- if(*cp++ != '\n')
- quit(CGMES, (char *) linebuf);
- rep->u.text = p;
- p = stext(p, addend);
- break;
- case 'i':
- rep->command = ICOM;
- if(rep->ad2.type != A_NONE)
- quit(AD1MES, (char *) linebuf);
- if(*cp == '\\') cp++;
- if(*cp++ != '\n')
- quit(CGMES, (char *) linebuf);
- rep->u.text = p;
- p = stext(p, addend);
- break;
-
- case 'g':
- rep->command = GCOM;
- break;
-
- case 'G':
- rep->command = CGCOM;
- break;
-
- case 'h':
- rep->command = HCOM;
- break;
-
- case 'H':
- rep->command = CHCOM;
- break;
-
- case 't':
- rep->command = TCOM;
- goto jtcommon;
-
- case 'b':
- rep->command = BCOM;
-jtcommon:
- while(*cp == ' ')cp++;
- if(*cp == '\0') {
- if(pt = ltab[0].chain) {
- while(pt1 = pt->u.lb1)
- pt = pt1;
- pt->u.lb1 = rep;
- } else
- ltab[0].chain = rep;
- break;
- }
- tp = lab->asc;
- while((*tp++ = *cp++))
- if(tp >= &(lab->asc[8]))
- quit(LTL, (char *) linebuf);
- cp--;
- tp[-1] = '\0';
-
- if(lpt = search(lab)) {
- if(lpt->address) {
- rep->u.lb1 = lpt->address;
- } else {
- pt = lpt->chain;
- while(pt1 = pt->u.lb1)
- pt = pt1;
- pt->u.lb1 = rep;
- }
- } else {
- lab->chain = rep;
- lab->address = 0;
- if(++lab >= labend)
- quit("Too many labels: %S",
- (char *) linebuf);
- }
- break;
-
- case 'n':
- rep->command = NCOM;
- break;
-
- case 'N':
- rep->command = CNCOM;
- break;
-
- case 'p':
- rep->command = PCOM;
- break;
-
- case 'P':
- rep->command = CPCOM;
- break;
-
- case 'r':
- rep->command = RCOM;
- if(rep->ad2.type != A_NONE)
- quit(AD1MES, (char *) linebuf);
- if(*cp++ != ' ')
- quit(CGMES, (char *) linebuf);
- rep->u.text = p;
- p = stext(p, addend);
- break;
-
- case 'd':
- rep->command = DCOM;
- break;
-
- case 'D':
- rep->command = CDCOM;
- rep->u.lb1 = pspace;
- break;
-
- case 'q':
- rep->command = QCOM;
- if(rep->ad2.type != A_NONE)
- quit(AD1MES, (char *) linebuf);
- break;
-
- case 'l':
- rep->command = LCOM;
- break;
-
- case 's':
- rep->command = SCOM;
- seof = *cp++;
- if ((rep->u.re1 = compile()) == 0) {
- if(!lastre)
- quit("First RE may not be null.", 0);
- rep->u.re1 = lastre;
- }
- rep->rhs = p;
- if((p = compsub(p, addend)) == 0)
- quit(CGMES, (char *) linebuf);
- if(*cp == 'g') {
- cp++;
- rep->gfl++;
- } else if(gflag)
- rep->gfl++;
-
- if(*cp == 'p') {
- cp++;
- rep->pfl = 1;
- }
-
- if(*cp == 'P') {
- cp++;
- rep->pfl = 2;
- }
-
- if(*cp == 'w') {
- cp++;
- if(*cp++ != ' ')
- quit(CGMES, (char *) linebuf);
- text(fname[nfiles]);
- for(i = nfiles - 1; i >= 0; i--)
- if(cmp(fname[nfiles],fname[i]) == 0) {
- rep->fcode = fcode[i];
- goto done;
- }
- if(nfiles >= MAXFILES)
- quit("Too many files in w commands 1", 0);
- rep->fcode = open_file(fname[nfiles]);
- }
- break;
-
- case 'w':
- rep->command = WCOM;
- if(*cp++ != ' ')
- quit(CGMES, (char *) linebuf);
- text(fname[nfiles]);
- for(i = nfiles - 1; i >= 0; i--)
- if(cmp(fname[nfiles], fname[i]) == 0) {
- rep->fcode = fcode[i];
- goto done;
- }
- if(nfiles >= MAXFILES){
- fprint(2, "sed: Too many files in w commands 2 \n");
- fprint(2, "nfiles = %d; MAXF = %d\n", nfiles, MAXFILES);
- errexit();
- }
- rep->fcode = open_file(fname[nfiles]);
- break;
-
- case 'x':
- rep->command = XCOM;
- break;
-
- case 'y':
- rep->command = YCOM;
- seof = *cp++;
- if (ycomp(rep) == 0)
- quit(CGMES, (char *) linebuf);
- break;
-
- }
-done:
- if(++rep >= pend)
- quit("Too many commands, last: %S", (char *) linebuf);
-
- if(*cp++ != '\0') {
- if(cp[-1] == ';')
- goto comploop;
- quit(CGMES, (char *) linebuf);
- }
-
- }
-}
-
-Biobuf *
-open_file(char *name)
-{
- Biobuf *bp;
- int fd;
-
- if ((bp = malloc(sizeof(Biobuf))) == 0)
- quit("Out of memory", 0);
- if ((fd = open(name, OWRITE)) < 0 &&
- (fd = create(name, OWRITE, 0666)) < 0)
- quit("Cannot create %s", name);
- Binit(bp, fd, OWRITE);
- Bseek(bp, 0, 2);
- fcode[nfiles++] = bp;
- return bp;
-}
-
-Rune *
-compsub(Rune *rhs, Rune *end)
-{
- Rune r;
-
- while ((r = *cp++) != '\0') {
- if(r == '\\') {
- if (rhs < end)
- *rhs++ = 0xFFFF;
- else
- return 0;
- r = *cp++;
- if(r == 'n')
- r = '\n';
- } else {
- if(r == seof) {
- if (rhs < end)
- *rhs++ = '\0';
- else
- return 0;
- return rhs;
- }
- }
- if (rhs < end)
- *rhs++ = r;
- else
- return 0;
-
- }
- return 0;
-}
-
-Reprog *
-compile(void)
-{
- Rune c;
- char *ep;
- char expbuf[512];
-
- if((c = *cp++) == seof) /* '//' */
- return 0;
- ep = expbuf;
- do {
- if (c == 0 || c == '\n')
- quit(TMMES, (char *) linebuf);
- if (c == '\\') {
- if (ep >= expbuf+sizeof(expbuf))
- quit(TMMES, (char *) linebuf);
- ep += runetochar(ep, &c);
- if ((c = *cp++) == 'n')
- c = '\n';
- }
- if (ep >= expbuf+sizeof(expbuf))
- quit(TMMES, (char *) linebuf);
- ep += runetochar(ep, &c);
- } while ((c = *cp++) != seof);
- *ep = 0;
- return lastre = regcomp(expbuf);
-}
-
-void
-regerror(char *s)
-{
- USED(s);
- quit(CGMES, (char *) linebuf);
-}
-
-void
-newfile(enum PTYPE type, char *name)
-{
- if (type == P_ARG)
- prog.pctl.curr = name;
- else if ((prog.pctl.bp = Bopen(name, OREAD)) == 0)
- quit("Cannot open pattern-file: %s\n", name);
- prog.type = type;
-}
-
-int
-rline(Rune *buf, Rune *end)
-{
- long c;
- Rune r;
-
- while ((c = getrune()) >= 0) {
- r = c;
- if (r == '\\') {
- if (buf <= end)
- *buf++ = r;
- if ((c = getrune()) < 0)
- break;
- r = c;
- } else if (r == '\n') {
- *buf = '\0';
- return(1);
- }
- if (buf <= end)
- *buf++ = r;
- }
- *buf = '\0';
- return(-1);
-}
-
-long
-getrune(void)
-{
- char *p;
- long c;
- Rune r;
-
- if (prog.type == P_ARG) {
- if ((p = prog.pctl.curr) != 0) {
- if (*p) {
- prog.pctl.curr += chartorune(&r, p);
- c = r;
- } else {
- c = '\n'; /* fake an end-of-line */
- prog.pctl.curr = 0;
- }
- } else
- c = -1;
- } else if ((c = Bgetrune(prog.pctl.bp)) < 0)
- Bterm(prog.pctl.bp);
- return c;
-}
-
-void
-address(Addr *ap)
-{
- int c;
- long lno;
-
- if((c = *cp++) == '$')
- ap->type = A_DOL;
- else if(c == '/') {
- seof = c;
- if (ap->u.rp = compile())
- ap->type = A_RE;
- else
- ap->type = A_LAST;
- }
- else if (c >= '0' && c <= '9') {
- lno = c-'0';
- while ((c = *cp) >= '0' && c <= '9')
- lno = lno*10 + *cp++-'0';
- if(!lno)
- quit("line number 0 is illegal",0);
- ap->type = A_LINE;
- ap->u.line = lno;
- }
- else {
- cp--;
- ap->type = A_NONE;
- }
-}
-
-int
-cmp(char *a, char *b) /* compare characters */
-{
- while(*a == *b++)
- if (*a == '\0')
- return(0);
- else a++;
- return(1);
-}
-
-int
-rcmp(Rune *a, Rune *b) /* compare runes */
-{
- while(*a == *b++)
- if (*a == '\0')
- return(0);
- else a++;
- return(1);
-}
-
-char *
-text(char *p) /* extract character string */
-{
- Rune r;
-
- while(*cp == '\t' || *cp == ' ')
- cp++;
- while (*cp) {
- if ((r = *cp++) == '\\')
- if ((r = *cp++) == 0)
- break;;
- if (r == '\n')
- while (*cp == '\t' || *cp == ' ')
- cp++;
- p += runetochar(p, &r);
- }
- *p++ = '\0';
- return p;
-}
-
-Rune *
-stext(Rune *p, Rune *end) /* extract rune string */
-{
- while(*cp == '\t' || *cp == ' ')
- cp++;
- while (*cp) {
- if (*cp == '\\')
- if (*++cp == 0)
- break;
- if (p >= end-1)
- quit(TMMES, (char *) linebuf);
- if ((*p++ = *cp++) == '\n')
- while(*cp == '\t' || *cp == ' ')
- cp++;
- }
- *p++ = 0;
- return p;
-}
-
-
-Label *
-search (Label *ptr)
-{
- Label *rp;
-
- for (rp = ltab; rp < ptr; rp++)
- if(rcmp(rp->asc, ptr->asc) == 0)
- return(rp);
- return(0);
-}
-
-void
-dechain(void)
-{
- Label *lptr;
- SedCom *rptr, *trptr;
-
- for(lptr = ltab; lptr < lab; lptr++) {
-
- if(lptr->address == 0)
- quit("Undefined label: %S", (char *) lptr->asc);
-
- if(lptr->chain) {
- rptr = lptr->chain;
- while(trptr = rptr->u.lb1) {
- rptr->u.lb1 = lptr->address;
- rptr = trptr;
- }
- rptr->u.lb1 = lptr->address;
- }
- }
-}
-
-int
-ycomp(SedCom *r)
-{
- int i;
- Rune *rp;
- Rune c, *tsp, highc;
- Rune *sp;
-
- highc = 0;
- for(tsp = cp; *tsp != seof; tsp++) {
- if(*tsp == '\\')
- tsp++;
- if(*tsp == '\n' || *tsp == '\0')
- return(0);
- if (*tsp > highc) highc = *tsp;
- }
- tsp++;
- if ((rp = r->u.text = (Rune *) malloc(sizeof(Rune)*(highc+2))) == 0)
- quit("Out of memory", 0);
- *rp++ = highc; /* save upper bound */
- for (i = 0; i <= highc; i++)
- rp[i] = i;
- sp = cp;
- while((c = *sp++) != seof) {
- if(c == '\\' && *sp == 'n') {
- sp++;
- c = '\n';
- }
- if((rp[c] = *tsp++) == '\\' && *tsp == 'n') {
- rp[c] = '\n';
- tsp++;
- }
- if(rp[c] == seof || rp[c] == '\0') {
- free(r->u.re1);
- r->u.re1 = 0;
- return(0);
- }
- }
- if(*tsp != seof) {
- free(r->u.re1);
- r->u.re1 = 0;
- return(0);
- }
- cp = tsp+1;
- return(1);
-}
-
-void
-execute(void)
-{
- SedCom *ipc;
-
- while (spend = gline(linebuf)){
- for(ipc = pspace; ipc->command; ) {
- if (!executable(ipc)) {
- ipc++;
- continue;
- }
- command(ipc);
-
- if(delflag)
- break;
- if(jflag) {
- jflag = 0;
- if((ipc = ipc->u.lb1) == 0)
- break;
- } else
- ipc++;
-
- }
- if(!nflag && !delflag)
- putline(&fout, linebuf, spend-linebuf);
- if(aptr > abuf) {
- arout();
- }
- delflag = 0;
- }
-}
- /* determine if a statement should be applied to an input line */
-int
-executable(SedCom *ipc)
-{
- if (ipc->active) { /* Addr1 satisfied - accept until Addr2 */
- if (ipc->active == 1) /* Second line */
- ipc->active = 2;
- switch(ipc->ad2.type) {
- case A_NONE: /* No second addr; use first */
- ipc->active = 0;
- break;
- case A_DOL: /* Accept everything */
- return !ipc->negfl;
- case A_LINE: /* Line at end of range? */
- if (lnum <= ipc->ad2.u.line) {
- if (ipc->ad2.u.line == lnum)
- ipc->active = 0;
- return !ipc->negfl;
- }
- ipc->active = 0; /* out of range */
- return ipc->negfl;
- case A_RE: /* Check for matching R.E. */
- if (match(ipc->ad2.u.rp, linebuf))
- ipc->active = 0;
- return !ipc->negfl;
- default: /* internal error */
- quit("Internal error", 0);
- }
- }
- switch (ipc->ad1.type) { /* Check first address */
- case A_NONE: /* Everything matches */
- return !ipc->negfl;
- case A_DOL: /* Only last line */
- if (dolflag)
- return !ipc->negfl;
- break;
- case A_LINE: /* Check line number */
- if (ipc->ad1.u.line == lnum) {
- ipc->active = 1; /* In range */
- return !ipc->negfl;
- }
- break;
- case A_RE: /* Check R.E. */
- if (match(ipc->ad1.u.rp, linebuf)) {
- ipc->active = 1; /* In range */
- return !ipc->negfl;
- }
- break;
- default:
- quit("Internal error", 0);
- }
- return ipc->negfl;
-}
-
-int
-match(Reprog *pattern, Rune *buf)
-{
- if (!pattern)
- return 0;
- subexp[0].s.rsp = buf;
- subexp[0].e.rep = 0;
- if (rregexec(pattern, linebuf, subexp, MAXSUB)) {
- loc1 = subexp[0].s.rsp;
- loc2 = subexp[0].e.rep;
- return 1;
- }
- loc1 = loc2 = 0;
- return 0;
-}
-
-int
-substitute(SedCom *ipc)
-{
- int len;
-
- if(!match(ipc->u.re1, linebuf))
- return 0;
-
- /*
- * we have at least one match. some patterns, e.g. '$' or '^', can
- * produce zero-length matches, so during a global substitute we
- * must bump to the character after a zero-length match to keep from looping.
- */
- sflag = 1;
- if(ipc->gfl == 0) /* single substitution */
- dosub(ipc->rhs);
- else
- do{ /* global substitution */
- len = loc2-loc1; /* length of match */
- dosub(ipc->rhs); /* dosub moves loc2 */
- if(*loc2 == 0) /* end of string */
- break;
- if(len == 0) /* zero-length R.E. match */
- loc2++; /* bump over zero-length match */
- if(*loc2 == 0) /* end of string */
- break;
- } while(match(ipc->u.re1, loc2));
- return 1;
-}
-
-void
-dosub(Rune *rhsbuf)
-{
- Rune *lp, *sp;
- Rune *rp;
- int c, n;
-
- lp = linebuf;
- sp = genbuf;
- rp = rhsbuf;
- while (lp < loc1)
- *sp++ = *lp++;
- while(c = *rp++) {
- if (c == '&') {
- sp = place(sp, loc1, loc2);
- continue;
- }
- if (c == 0xFFFF && (c = *rp++) >= '1' && c < MAXSUB+'0') {
- n = c-'0';
- if (subexp[n].s.rsp && subexp[n].e.rep) {
- sp = place(sp, subexp[n].s.rsp, subexp[n].e.rep);
- continue;
- }
- else {
- fprint(2, "sed: Invalid back reference \\%d\n",n);
- errexit();
- }
- }
- *sp++ = c;
- if (sp >= &genbuf[LBSIZE])
- fprint(2, "sed: Output line too long.\n");
- }
- lp = loc2;
- loc2 = sp - genbuf + linebuf;
- while (*sp++ = *lp++)
- if (sp >= &genbuf[LBSIZE])
- fprint(2, "sed: Output line too long.\n");
- lp = linebuf;
- sp = genbuf;
- while (*lp++ = *sp++)
- ;
- spend = lp-1;
-}
-
-Rune *
-place(Rune *sp, Rune *l1, Rune *l2)
-{
- while (l1 < l2) {
- *sp++ = *l1++;
- if (sp >= &genbuf[LBSIZE])
- fprint(2, "sed: Output line too long.\n");
- }
- return(sp);
-}
-
-char *
-trans(int c)
-{
- static char buf[] = "\\x0000";
- static char hex[] = "0123456789abcdef";
-
- switch(c) {
- case '\b':
- return "\\b";
- case '\n':
- return "\\n";
- case '\r':
- return "\\r";
- case '\t':
- return "\\t";
- case '\\':
- return "\\\\";
- }
- buf[2] = hex[(c>>12)&0xF];
- buf[3] = hex[(c>>8)&0xF];
- buf[4] = hex[(c>>4)&0xF];
- buf[5] = hex[c&0xF];
- return buf;
-}
-
-void
-command(SedCom *ipc)
-{
- int i, c;
- Rune *p1, *p2;
- char *ucp;
- Rune *rp;
- Rune *execp;
-
- switch(ipc->command) {
-
- case ACOM:
- *aptr++ = ipc;
- if(aptr >= abuf+MAXADDS) {
- quit("sed: Too many appends after line %ld\n",
- (char *) lnum);
- }
- *aptr = 0;
- break;
- case CCOM:
- delflag = 1;
- if(ipc->active == 1) {
- for(rp = ipc->u.text; *rp; rp++)
- Bputrune(&fout, *rp);
- Bputc(&fout, '\n');
- }
- break;
- case DCOM:
- delflag++;
- break;
- case CDCOM:
- p1 = p2 = linebuf;
- while(*p1 != '\n') {
- if(*p1++ == 0) {
- delflag++;
- return;
- }
- }
- p1++;
- while(*p2++ = *p1++)
- ;
- spend = p2-1;
- jflag++;
- break;
- case EQCOM:
- Bprint(&fout, "%ld\n", lnum);
- break;
- case GCOM:
- p1 = linebuf;
- p2 = holdsp;
- while(*p1++ = *p2++)
- ;
- spend = p1-1;
- break;
- case CGCOM:
- *spend++ = '\n';
- p1 = spend;
- p2 = holdsp;
- while(*p1++ = *p2++)
- if(p1 >= lbend)
- break;
- spend = p1-1;
- break;
- case HCOM:
- p1 = holdsp;
- p2 = linebuf;
- while(*p1++ = *p2++);
- hspend = p1-1;
- break;
- case CHCOM:
- *hspend++ = '\n';
- p1 = hspend;
- p2 = linebuf;
- while(*p1++ = *p2++)
- if(p1 >= hend)
- break;
- hspend = p1-1;
- break;
- case ICOM:
- for(rp = ipc->u.text; *rp; rp++)
- Bputrune(&fout, *rp);
- Bputc(&fout, '\n');
- break;
- case BCOM:
- jflag = 1;
- break;
- case LCOM:
- c = 0;
- for (i = 0, rp = linebuf; *rp; rp++) {
- c = *rp;
- if(c >= 0x20 && c < 0x7F && c != '\\') {
- Bputc(&fout, c);
- if(i++ > 71) {
- Bprint(&fout, "\\\n");
- i = 0;
- }
- } else {
- for (ucp = trans(*rp); *ucp; ucp++){
- c = *ucp;
- Bputc(&fout, c);
- if(i++ > 71) {
- Bprint(&fout, "\\\n");
- i = 0;
- }
- }
- }
- }
- if(c == ' ')
- Bprint(&fout, "\\n");
- Bputc(&fout, '\n');
- break;
- case NCOM:
- if(!nflag)
- putline(&fout, linebuf, spend-linebuf);
-
- if(aptr > abuf)
- arout();
- if((execp = gline(linebuf)) == 0) {
- delflag = 1;
- break;
- }
- spend = execp;
- break;
- case CNCOM:
- if(aptr > abuf)
- arout();
- *spend++ = '\n';
- if((execp = gline(spend)) == 0) {
- delflag = 1;
- break;
- }
- spend = execp;
- break;
- case PCOM:
- putline(&fout, linebuf, spend-linebuf);
- break;
- case CPCOM:
- cpcom:
- for(rp = linebuf; *rp && *rp != '\n'; rp++)
- Bputc(&fout, *rp);
- Bputc(&fout, '\n');
- break;
- case QCOM:
- if(!nflag)
- putline(&fout, linebuf, spend-linebuf);
- if(aptr > abuf)
- arout();
- exits(0);
- case RCOM:
- *aptr++ = ipc;
- if(aptr >= &abuf[MAXADDS])
- quit("sed: Too many reads after line %ld\n",
- (char *) lnum);
- *aptr = 0;
- break;
- case SCOM:
- i = substitute(ipc);
- if(i && ipc->pfl)
- if(ipc->pfl == 1)
- putline(&fout, linebuf, spend-linebuf);
- else
- goto cpcom;
- if(i && ipc->fcode)
- goto wcom;
- break;
-
- case TCOM:
- if(sflag == 0) break;
- sflag = 0;
- jflag = 1;
- break;
-
- wcom:
- case WCOM:
- putline(ipc->fcode,linebuf, spend-linebuf);
- break;
- case XCOM:
- p1 = linebuf;
- p2 = genbuf;
- while(*p2++ = *p1++);
- p1 = holdsp;
- p2 = linebuf;
- while(*p2++ = *p1++);
- spend = p2 - 1;
- p1 = genbuf;
- p2 = holdsp;
- while(*p2++ = *p1++);
- hspend = p2 - 1;
- break;
- case YCOM:
- p1 = linebuf;
- p2 = ipc->u.text;
- for (i = *p2++; *p1; p1++){
- if (*p1 <= i) *p1 = p2[*p1];
- }
- break;
- }
-
-}
-
-void
-putline(Biobuf *bp, Rune *buf, int n)
-{
- while (n--)
- Bputrune(bp, *buf++);
- Bputc(bp, '\n');
-}
-
-int
-ecmp(Rune *a, Rune *b, int count)
-{
- while(count--)
- if(*a++ != *b++) return(0);
- return(1);
-}
-
-void
-arout(void)
-{
- Rune *p1;
- Biobuf *fi;
- int c;
- char *s;
- char buf[128];
-
- for (aptr = abuf; *aptr; aptr++) {
- if((*aptr)->command == ACOM) {
- for(p1 = (*aptr)->u.text; *p1; p1++ )
- Bputrune(&fout, *p1);
- Bputc(&fout, '\n');
- } else {
- for(s = buf, p1= (*aptr)->u.text; *p1; p1++)
- s += runetochar(s, p1);
- *s = '\0';
- if((fi = Bopen(buf, OREAD)) == 0)
- continue;
- while((c = Bgetc(fi)) >= 0)
- Bputc(&fout, c);
- Bterm(fi);
- }
- }
- aptr = abuf;
- *aptr = 0;
-}
-
-void
-errexit(void)
-{
- exits("error");
-}
-
-void
-quit (char *msg, char *arg)
-{
- fprint(2, "sed: ");
- fprint(2, msg, arg);
- fprint(2, "\n");
- errexit();
-}
-
-Rune *
-gline(Rune *addr)
-{
- long c;
- Rune *p;
-
- static long peekc = 0;
-
- if (f == 0 && opendata() < 0)
- return 0;
- sflag = 0;
- lnum++;
-/* Bflush(&fout);********* dumped 4/30/92 - bobf****/
- do {
- p = addr;
- for (c = (peekc ? peekc : Bgetrune(f)); c >= 0; c = Bgetrune(f)) {
- if (c == '\n') {
- if ((peekc = Bgetrune(f)) < 0) {
- if (fhead == 0)
- dolflag = 1;
- }
- *p = '\0';
- return p;
- }
- if (c && p < lbend)
- *p++ = c;
- }
- /* return partial final line, adding implicit newline */
- if(p != addr) {
- *p = '\0';
- peekc = -1;
- if (fhead == 0)
- dolflag = 1;
- return p;
- }
- peekc = 0;
- Bterm(f);
- } while (opendata() > 0); /* Switch to next stream */
- f = 0;
- return 0;
-}
-
- /* Data file input section - the intent is to transparently
- * catenate all data input streams.
- */
-void
-enroll(char *filename) /* Add a file to the input file cache */
-{
- FileCache *fp;
-
- if ((fp = (FileCache *) malloc(sizeof (FileCache))) == 0)
- quit("Out of memory", 0);
- if (ftail == 0)
- fhead = fp;
- else
- ftail->next = fp;
- ftail = fp;
- fp->next = 0;
- fp->name = filename; /* 0 => stdin */
-}
-
-int
-opendata(void)
-{
- if (fhead == 0)
- return -1;
- if (fhead->name) {
- if ((f = Bopen(fhead->name, OREAD)) == 0)
- quit("Can't open %s", fhead->name);
- } else {
- Binit(&bstdin, 0, OREAD);
- f = &bstdin;
- }
- fhead = fhead->next;
- return 1;
-}
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