double avpriv_strtod(char *restrict nptr, char **restrict endptr) { char *end; double res; /* Skip leading spaces */ while (isspace(*nptr)) nptr++; if (!av_strncasecmp(nptr, "infinity", 8)) { end = nptr + 8; res = INFINITY; } else if (!av_strncasecmp(nptr, "inf", 3)) { end = nptr + 3; res = INFINITY; } else if (!av_strncasecmp(nptr, "+infinity", 9)) { end = nptr + 9; res = INFINITY; } else if (!av_strncasecmp(nptr, "+inf", 4)) { end = nptr + 4; res = INFINITY; } else if (!av_strncasecmp(nptr, "-infinity", 9)) { end = nptr + 9; res = -INFINITY; } else if (!av_strncasecmp(nptr, "-inf", 4)) { end = nptr + 4; res = -INFINITY; } else if (!av_strncasecmp(nptr, "nan", 3)) { end = check_nan_suffix(nptr + 3); res = NAN; } else if (!av_strncasecmp(nptr, "+nan", 4) || !av_strncasecmp(nptr, "-nan", 4)) { end = check_nan_suffix(nptr + 4); res = NAN; } else if (!av_strncasecmp(nptr, "0x", 2) || !av_strncasecmp(nptr, "-0x", 3) || !av_strncasecmp(nptr, "+0x", 3)) { /* FIXME this doesn't handle exponents, non-integers (float/double) * and numbers too large for long long */ res = strtoll(nptr, &end, 16); } else { res = strtod(nptr, &end); } if (endptr) *endptr = end; return res; }