forked from sheetjs/sheetjs
43 lines
1.6 KiB
JavaScript
43 lines
1.6 KiB
JavaScript
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var abstime = /\[[HhMmSs]*\]/;
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function fmt_is_date(fmt/*:string*/)/*:boolean*/ {
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var i = 0, cc = 0, c = "", o = "";
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while(i < fmt.length) {
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switch((c = fmt.charAt(i))) {
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case 'G': if(isgeneral(fmt, i)) i+= 6; i++; break;
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case '"': for(;(cc=fmt.charCodeAt(++i)) !== 34 && i < fmt.length;) ++i; ++i; break;
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case '\\': i+=2; break;
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case '_': i+=2; break;
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case '@': ++i; break;
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case 'B': case 'b':
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if(fmt.charAt(i+1) === "1" || fmt.charAt(i+1) === "2") return true;
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/* falls through */
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case 'M': case 'D': case 'Y': case 'H': case 'S': case 'E':
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/* falls through */
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case 'm': case 'd': case 'y': case 'h': case 's': case 'e': case 'g': return true;
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case 'A':
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if(fmt.substr(i, 3) === "A/P") return true;
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if(fmt.substr(i, 5) === "AM/PM") return true;
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++i; break;
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case '[':
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o = c;
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while(fmt.charAt(i++) !== ']' && i < fmt.length) o += fmt.charAt(i);
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if(o.match(abstime)) return true;
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break;
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case '.':
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/* falls through */
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case '0': case '#':
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while(i < fmt.length && ("0#?.,E+-%".indexOf(c=fmt.charAt(++i)) > -1 || c=='\\' && fmt.charAt(i+1) == "-" && "0#".indexOf(fmt.charAt(i+2))>-1));
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break;
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case '?': while(fmt.charAt(++i) === c); break;
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case '*': ++i; if(fmt.charAt(i) == ' ' || fmt.charAt(i) == '*') ++i; break;
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case '(': case ')': ++i; break;
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case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9':
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while(i < fmt.length && "0123456789".indexOf(fmt.charAt(++i)) > -1); break;
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case ' ': ++i; break;
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default: ++i; break;
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}
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}
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return false;
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}
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SSF.is_date = fmt_is_date;
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