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-rw-r--r--src/libfmt/dofmt.c558
1 files changed, 558 insertions, 0 deletions
diff --git a/src/libfmt/dofmt.c b/src/libfmt/dofmt.c
new file mode 100644
index 00000000..d26f7158
--- /dev/null
+++ b/src/libfmt/dofmt.c
@@ -0,0 +1,558 @@
+/*
+ * The authors of this software are Rob Pike and Ken Thompson.
+ * Copyright (c) 2002 by Lucent Technologies.
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose without fee is hereby granted, provided that this entire notice
+ * is included in all copies of any software which is or includes a copy
+ * or modification of this software and in all copies of the supporting
+ * documentation for such software.
+ * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED
+ * WARRANTY. IN PARTICULAR, NEITHER THE AUTHORS NOR LUCENT TECHNOLOGIES MAKE ANY
+ * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY
+ * OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
+ */
+#include <stdarg.h>
+#include <string.h>
+#include "utf.h"
+#include "fmt.h"
+#include "fmtdef.h"
+
+/* format the output into f->to and return the number of characters fmted */
+int
+dofmt(Fmt *f, char *fmt)
+{
+ Rune rune, *rt, *rs;
+ int r;
+ char *t, *s;
+ int n, nfmt;
+
+ nfmt = f->nfmt;
+ for(;;){
+ if(f->runes){
+ rt = (Rune*)f->to;
+ rs = (Rune*)f->stop;
+ while((r = *(uchar*)fmt) && r != '%'){
+ if(r < Runeself)
+ fmt++;
+ else{
+ fmt += chartorune(&rune, fmt);
+ r = rune;
+ }
+ FMTRCHAR(f, rt, rs, r);
+ }
+ fmt++;
+ f->nfmt += rt - (Rune *)f->to;
+ f->to = rt;
+ if(!r)
+ return f->nfmt - nfmt;
+ f->stop = rs;
+ }else{
+ t = (char*)f->to;
+ s = (char*)f->stop;
+ while((r = *(uchar*)fmt) && r != '%'){
+ if(r < Runeself){
+ FMTCHAR(f, t, s, r);
+ fmt++;
+ }else{
+ n = chartorune(&rune, fmt);
+ if(t + n > s){
+ t = (char*)__fmtflush(f, t, n);
+ if(t != nil)
+ s = (char*)f->stop;
+ else
+ return -1;
+ }
+ while(n--)
+ *t++ = *fmt++;
+ }
+ }
+ fmt++;
+ f->nfmt += t - (char *)f->to;
+ f->to = t;
+ if(!r)
+ return f->nfmt - nfmt;
+ f->stop = s;
+ }
+
+ fmt = (char*)__fmtdispatch(f, fmt, 0);
+ if(fmt == nil)
+ return -1;
+ }
+ return 0; /* not reached */
+}
+
+void *
+__fmtflush(Fmt *f, void *t, int len)
+{
+ if(f->runes)
+ f->nfmt += (Rune*)t - (Rune*)f->to;
+ else
+ f->nfmt += (char*)t - (char *)f->to;
+ f->to = t;
+ if(f->flush == 0 || (*f->flush)(f) == 0 || (char*)f->to + len > (char*)f->stop){
+ f->stop = f->to;
+ return nil;
+ }
+ return f->to;
+}
+
+/*
+ * put a formatted block of memory sz bytes long of n runes into the output buffer,
+ * left/right justified in a field of at least f->width charactes
+ */
+int
+__fmtpad(Fmt *f, int n)
+{
+ char *t, *s;
+ int i;
+
+ t = (char*)f->to;
+ s = (char*)f->stop;
+ for(i = 0; i < n; i++)
+ FMTCHAR(f, t, s, ' ');
+ f->nfmt += t - (char *)f->to;
+ f->to = t;
+ return 0;
+}
+
+int
+__rfmtpad(Fmt *f, int n)
+{
+ Rune *t, *s;
+ int i;
+
+ t = (Rune*)f->to;
+ s = (Rune*)f->stop;
+ for(i = 0; i < n; i++)
+ FMTRCHAR(f, t, s, ' ');
+ f->nfmt += t - (Rune *)f->to;
+ f->to = t;
+ return 0;
+}
+
+int
+__fmtcpy(Fmt *f, const void *vm, int n, int sz)
+{
+ Rune *rt, *rs, r;
+ char *t, *s, *m, *me;
+ ulong fl;
+ int nc, w;
+
+ m = (char*)vm;
+ me = m + sz;
+ w = f->width;
+ fl = f->flags;
+ if((fl & FmtPrec) && n > f->prec)
+ n = f->prec;
+ if(f->runes){
+ if(!(fl & FmtLeft) && __rfmtpad(f, w - n) < 0)
+ return -1;
+ rt = (Rune*)f->to;
+ rs = (Rune*)f->stop;
+ for(nc = n; nc > 0; nc--){
+ r = *(uchar*)m;
+ if(r < Runeself)
+ m++;
+ else if((me - m) >= UTFmax || fullrune(m, me-m))
+ m += chartorune(&r, m);
+ else
+ break;
+ FMTRCHAR(f, rt, rs, r);
+ }
+ f->nfmt += rt - (Rune *)f->to;
+ f->to = rt;
+ if(m < me)
+ return -1;
+ if(fl & FmtLeft && __rfmtpad(f, w - n) < 0)
+ return -1;
+ }else{
+ if(!(fl & FmtLeft) && __fmtpad(f, w - n) < 0)
+ return -1;
+ t = (char*)f->to;
+ s = (char*)f->stop;
+ for(nc = n; nc > 0; nc--){
+ r = *(uchar*)m;
+ if(r < Runeself)
+ m++;
+ else if((me - m) >= UTFmax || fullrune(m, me-m))
+ m += chartorune(&r, m);
+ else
+ break;
+ FMTRUNE(f, t, s, r);
+ }
+ f->nfmt += t - (char *)f->to;
+ f->to = t;
+ if(fl & FmtLeft && __fmtpad(f, w - n) < 0)
+ return -1;
+ }
+ return 0;
+}
+
+int
+__fmtrcpy(Fmt *f, const void *vm, int n)
+{
+ Rune r, *m, *me, *rt, *rs;
+ char *t, *s;
+ ulong fl;
+ int w;
+
+ m = (Rune*)vm;
+ w = f->width;
+ fl = f->flags;
+ if((fl & FmtPrec) && n > f->prec)
+ n = f->prec;
+ if(f->runes){
+ if(!(fl & FmtLeft) && __rfmtpad(f, w - n) < 0)
+ return -1;
+ rt = (Rune*)f->to;
+ rs = (Rune*)f->stop;
+ for(me = m + n; m < me; m++)
+ FMTRCHAR(f, rt, rs, *m);
+ f->nfmt += rt - (Rune *)f->to;
+ f->to = rt;
+ if(fl & FmtLeft && __rfmtpad(f, w - n) < 0)
+ return -1;
+ }else{
+ if(!(fl & FmtLeft) && __fmtpad(f, w - n) < 0)
+ return -1;
+ t = (char*)f->to;
+ s = (char*)f->stop;
+ for(me = m + n; m < me; m++){
+ r = *m;
+ FMTRUNE(f, t, s, r);
+ }
+ f->nfmt += t - (char *)f->to;
+ f->to = t;
+ if(fl & FmtLeft && __fmtpad(f, w - n) < 0)
+ return -1;
+ }
+ return 0;
+}
+
+/* fmt out one character */
+int
+__charfmt(Fmt *f)
+{
+ char x[1];
+
+ x[0] = va_arg(f->args, int);
+ f->prec = 1;
+ return __fmtcpy(f, (const char*)x, 1, 1);
+}
+
+/* fmt out one rune */
+int
+__runefmt(Fmt *f)
+{
+ Rune x[1];
+
+ x[0] = va_arg(f->args, int);
+ return __fmtrcpy(f, (const void*)x, 1);
+}
+
+/* public helper routine: fmt out a null terminated string already in hand */
+int
+fmtstrcpy(Fmt *f, char *s)
+{
+ int p, i;
+ if(!s)
+ return __fmtcpy(f, "<nil>", 5, 5);
+ /* if precision is specified, make sure we don't wander off the end */
+ if(f->flags & FmtPrec){
+ p = f->prec;
+ for(i = 0; i < p; i++)
+ if(s[i] == 0)
+ break;
+ return __fmtcpy(f, s, utfnlen(s, i), i); /* BUG?: won't print a partial rune at end */
+ }
+
+ return __fmtcpy(f, s, utflen(s), strlen(s));
+}
+
+/* fmt out a null terminated utf string */
+int
+__strfmt(Fmt *f)
+{
+ char *s;
+
+ s = va_arg(f->args, char *);
+ return fmtstrcpy(f, s);
+}
+
+/* public helper routine: fmt out a null terminated rune string already in hand */
+int
+fmtrunestrcpy(Fmt *f, Rune *s)
+{
+ Rune *e;
+ int n, p;
+
+ if(!s)
+ return __fmtcpy(f, "<nil>", 5, 5);
+ /* if precision is specified, make sure we don't wander off the end */
+ if(f->flags & FmtPrec){
+ p = f->prec;
+ for(n = 0; n < p; n++)
+ if(s[n] == 0)
+ break;
+ }else{
+ for(e = s; *e; e++)
+ ;
+ n = e - s;
+ }
+ return __fmtrcpy(f, s, n);
+}
+
+/* fmt out a null terminated rune string */
+int
+__runesfmt(Fmt *f)
+{
+ Rune *s;
+
+ s = va_arg(f->args, Rune *);
+ return fmtrunestrcpy(f, s);
+}
+
+/* fmt a % */
+int
+__percentfmt(Fmt *f)
+{
+ Rune x[1];
+
+ x[0] = f->r;
+ f->prec = 1;
+ return __fmtrcpy(f, (const void*)x, 1);
+}
+
+/* fmt an integer */
+int
+__ifmt(Fmt *f)
+{
+ char buf[70], *p, *conv;
+ uvlong vu;
+ ulong u;
+ int neg, base, i, n, fl, w, isv;
+
+ neg = 0;
+ fl = f->flags;
+ isv = 0;
+ vu = 0;
+ u = 0;
+ /*
+ * Unsigned verbs
+ */
+ switch(f->r){
+ case 'o':
+ case 'u':
+ case 'x':
+ case 'X':
+ fl |= FmtUnsigned;
+ break;
+ }
+ if(f->r == 'p'){
+ u = (ulong)va_arg(f->args, void*);
+ f->r = 'x';
+ fl |= FmtUnsigned;
+ }else if(fl & FmtVLong){
+ isv = 1;
+ if(fl & FmtUnsigned)
+ vu = va_arg(f->args, uvlong);
+ else
+ vu = va_arg(f->args, vlong);
+ }else if(fl & FmtLong){
+ if(fl & FmtUnsigned)
+ u = va_arg(f->args, ulong);
+ else
+ u = va_arg(f->args, long);
+ }else if(fl & FmtByte){
+ if(fl & FmtUnsigned)
+ u = (uchar)va_arg(f->args, int);
+ else
+ u = (char)va_arg(f->args, int);
+ }else if(fl & FmtShort){
+ if(fl & FmtUnsigned)
+ u = (ushort)va_arg(f->args, int);
+ else
+ u = (short)va_arg(f->args, int);
+ }else{
+ if(fl & FmtUnsigned)
+ u = va_arg(f->args, uint);
+ else
+ u = va_arg(f->args, int);
+ }
+ conv = "0123456789abcdef";
+ switch(f->r){
+ case 'd':
+ case 'i':
+ base = 10;
+ break;
+ case 'u':
+ base = 10;
+ break;
+ case 'x':
+ base = 16;
+ break;
+ case 'X':
+ base = 16;
+ conv = "0123456789ABCDEF";
+ break;
+ case 'b':
+ base = 2;
+ break;
+ case 'o':
+ base = 8;
+ break;
+ default:
+ return -1;
+ }
+ if(!(fl & FmtUnsigned)){
+ if(isv && (vlong)vu < 0){
+ vu = -(vlong)vu;
+ neg = 1;
+ }else if(!isv && (long)u < 0){
+ u = -(long)u;
+ neg = 1;
+ }
+ }else{
+ fl &= ~(FmtSign|FmtSpace); /* no + for unsigned conversions */
+ }
+ p = buf + sizeof buf - 1;
+ n = 0;
+ if(isv){
+ while(vu){
+ i = vu % base;
+ vu /= base;
+ if((fl & FmtComma) && n % 4 == 3){
+ *p-- = ',';
+ n++;
+ }
+ *p-- = conv[i];
+ n++;
+ }
+ }else{
+ while(u){
+ i = u % base;
+ u /= base;
+ if((fl & FmtComma) && n % 4 == 3){
+ *p-- = ',';
+ n++;
+ }
+ *p-- = conv[i];
+ n++;
+ }
+ }
+ if(n == 0){
+ if(!(fl & FmtPrec) || f->prec != 0){
+ *p-- = '0';
+ n = 1;
+ }
+ fl &= ~FmtSharp;
+ }
+ for(w = f->prec; n < w && p > buf+3; n++)
+ *p-- = '0';
+ if(neg || (fl & (FmtSign|FmtSpace)))
+ n++;
+ if(fl & FmtSharp){
+ if(base == 16)
+ n += 2;
+ else if(base == 8){
+ if(p[1] == '0')
+ fl &= ~FmtSharp;
+ else
+ n++;
+ }
+ }
+ if((fl & FmtZero) && !(fl & (FmtLeft|FmtPrec))){
+ for(w = f->width; n < w && p > buf+3; n++)
+ *p-- = '0';
+ f->width = 0;
+ }
+ if(fl & FmtSharp){
+ if(base == 16)
+ *p-- = f->r;
+ if(base == 16 || base == 8)
+ *p-- = '0';
+ }
+ if(neg)
+ *p-- = '-';
+ else if(fl & FmtSign)
+ *p-- = '+';
+ else if(fl & FmtSpace)
+ *p-- = ' ';
+ f->flags &= ~FmtPrec;
+ return __fmtcpy(f, p + 1, n, n);
+}
+
+int
+__countfmt(Fmt *f)
+{
+ void *p;
+ ulong fl;
+
+ fl = f->flags;
+ p = va_arg(f->args, void*);
+ if(fl & FmtVLong){
+ *(vlong*)p = f->nfmt;
+ }else if(fl & FmtLong){
+ *(long*)p = f->nfmt;
+ }else if(fl & FmtByte){
+ *(char*)p = f->nfmt;
+ }else if(fl & FmtShort){
+ *(short*)p = f->nfmt;
+ }else{
+ *(int*)p = f->nfmt;
+ }
+ return 0;
+}
+
+int
+__flagfmt(Fmt *f)
+{
+ switch(f->r){
+ case ',':
+ f->flags |= FmtComma;
+ break;
+ case '-':
+ f->flags |= FmtLeft;
+ break;
+ case '+':
+ f->flags |= FmtSign;
+ break;
+ case '#':
+ f->flags |= FmtSharp;
+ break;
+ case ' ':
+ f->flags |= FmtSpace;
+ break;
+ case 'u':
+ f->flags |= FmtUnsigned;
+ break;
+ case 'h':
+ if(f->flags & FmtShort)
+ f->flags |= FmtByte;
+ f->flags |= FmtShort;
+ break;
+ case 'L':
+ f->flags |= FmtLDouble;
+ break;
+ case 'l':
+ if(f->flags & FmtLong)
+ f->flags |= FmtVLong;
+ f->flags |= FmtLong;
+ break;
+ }
+ return 1;
+}
+
+/* default error format */
+int
+__badfmt(Fmt *f)
+{
+ char x[3];
+
+ x[0] = '%';
+ x[1] = f->r;
+ x[2] = '%';
+ f->prec = 3;
+ __fmtcpy(f, (const void*)x, 3, 3);
+ return 0;
+}
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