ref: ee93b99842546dc501a383e06fd0ba4af904e150
dir: /sys/src/libc/port/encodefmt.c/
#include <u.h> #include <libc.h> #include <ctype.h> int encodefmt(Fmt *f) { char *out; char *buf; int len; int ilen; int rv; uchar *b; char *p; char obuf[64]; // rsc optimization if(!(f->flags&FmtPrec) || f->prec < 1) goto error; b = va_arg(f->args, uchar*); if(b == 0) return fmtstrcpy(f, "<nil>"); ilen = f->prec; f->prec = 0; f->flags &= ~FmtPrec; switch(f->r){ case '<': len = (8*ilen+4)/5 + 3; break; case '[': len = (8*ilen+5)/6 + 4; break; case 'H': len = 2*ilen + 1; break; default: goto error; } if(len > sizeof(obuf)){ buf = malloc(len); if(buf == nil) goto error; } else buf = obuf; // convert out = buf; switch(f->r){ case '[': rv = enc64(out, len, b, ilen); break; case '<': rv = enc32(out, len, b, ilen); break; case 'H': rv = enc16(out, len, b, ilen); break; default: rv = -1; break; } if(rv < 0) goto error; if((f->flags & FmtLong) != 0 && f->r != '[') for(p = buf; *p; p++) *p = tolower(*p); fmtstrcpy(f, buf); if(buf != obuf) free(buf); return 0; error: return fmtstrcpy(f, "<encodefmt>"); }