diff options
Diffstat (limited to 'sprintf.c')
-rw-r--r-- | sprintf.c | 36 |
1 files changed, 36 insertions, 0 deletions
@@ -688,6 +688,42 @@ rb_f_sprintf(argc, argv) char fbuf[32]; fval = RFLOAT(rb_Float(val))->value; + if (isnan(fval) || isinf(fval)) { + char *expr; + + if (isnan(fval)) { + expr = "NaN"; + } + else { + expr = "Inf"; + } + need = strlen(expr); + if (fval < 0.0 || (flags & FPLUS)) + need++; + if ((flags & FWIDTH) && need < width) + need = width; + + CHECK(need); + sprintf(&buf[blen], "%*s", need, ""); + if (flags & FMINUS) { + if (fval < 0.0) + buf[blen++] = '-'; + else if (flags & FPLUS) + buf[blen++] = '+'; + strncpy(&buf[blen], expr, strlen(expr)); + } + else { + if (fval < 0.0) + buf[blen + need - strlen(expr) - 1] = '-'; + else if (flags & FPLUS) + buf[blen + need - strlen(expr) - 1] = '+'; + strncpy(&buf[blen + need - strlen(expr)], expr, + strlen(expr)); + } + blen += strlen(&buf[blen]); + break; + } + fmt_setup(fbuf, *p, flags, width, prec); need = 0; if (*p != 'e' && *p != 'E') { |