mirror of https://github.com/0intro/wmii
90 lines
2.0 KiB
C
90 lines
2.0 KiB
C
/*
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* The authors of this software are Rob Pike and Ken Thompson.
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* Copyright (c) 2002 by Lucent Technologies.
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* Permission to use, copy, modify, and distribute this software for any
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* purpose without fee is hereby granted, provided that this entire notice
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* is included in all copies of any software which is or includes a copy
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* or modification of this software and in all copies of the supporting
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* documentation for such software.
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* THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTY. IN PARTICULAR, NEITHER THE AUTHORS NOR LUCENT TECHNOLOGIES MAKE
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* ANY REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY
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* OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
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*/
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/*
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* Plan 9 port version must include libc.h in order to
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* get Plan 9 debugging malloc, which sometimes returns
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* different pointers than the standard malloc.
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*/
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#include <stdlib.h>
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#include <string.h>
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#include "plan9.h"
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#include "fmt.h"
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#include "fmtdef.h"
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static int
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fmtStrFlush(Fmt *f)
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{
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char *s;
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int n;
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if(f->start == nil)
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return 0;
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n = (uintptr_t)f->farg;
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n *= 2;
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s = (char*)f->start;
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f->start = realloc(s, n);
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if(f->start == nil){
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f->farg = nil;
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f->to = nil;
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f->stop = nil;
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free(s);
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return 0;
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}
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f->farg = (void*)(uintptr_t)n;
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f->to = (char*)f->start + ((char*)f->to - s);
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f->stop = (char*)f->start + n - 1;
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return 1;
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}
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int
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fmtstrinit(Fmt *f)
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{
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int n;
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memset(f, 0, sizeof *f);
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f->runes = 0;
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n = 32;
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f->start = malloc(n);
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if(f->start == nil)
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return -1;
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f->to = f->start;
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f->stop = (char*)f->start + n - 1;
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f->flush = fmtStrFlush;
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f->farg = (void*)(uintptr_t)n;
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f->nfmt = 0;
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fmtlocaleinit(f, nil, nil, nil);
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return 0;
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}
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/*
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* print into an allocated string buffer
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*/
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char*
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vsmprint(const char *fmt, va_list args)
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{
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Fmt f;
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int n;
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if(fmtstrinit(&f) < 0)
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return nil;
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va_copy(f.args,args);
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n = dofmt(&f, fmt);
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va_end(f.args);
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if(n < 0){
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free(f.start);
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return nil;
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}
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return fmtstrflush(&f);
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}
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