ccollins476ad commented on a change in pull request #882: libc: Add support for
float in printf
URL: https://github.com/apache/mynewt-core/pull/882#discussion_r173255151
##########
File path: libc/baselibc/src/tinyprintf.c
##########
@@ -337,6 +339,38 @@ size_t tfp_format(FILE *putp, const char *fmt, va_list va)
written += putchw(putp, &p);
p.bf = bf;
break;
+ case 'f':
+ p.base = 10;
+ d = va_arg(va, double);
+ /* Cast to an int to get the integer part of the number */
+ n = (int)d;
+ /* Convert to ascii */
+ i2a(n, &p);
+ /* Ignore left align for integer part */
+ p.left = 0;
+ /* Subtract width for decimal part and decimal point */
+ if (p.width >= 4) {
+ p.width -= 4;
+ } else {
+ p.width = 0;
+ }
+ /* Write integer part to console */
+ written += putchw(putp, &p);
+ /* Take the decimal part and multiply by 1000 */
+ n = (d-n)*1000;
+ /* Convert to asii */
Review comment:
Minor typo: should be "ascii".
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