Format(0, "0.00e+00") returns 0.00e-01

[freebasic]

Format(0, "0.00e+00") returns 0.00e-01

[srvaldez]

Hi counting_pine<https://www.freebasic.net/forum/memberlist.php?mode=viewprofile&u=220> Im am happy that you are working on this, I made a small VB6 application to format numbers, I hope that since you don't have access to VB6 that it will be of help https://github.com/srvaldez/FreeBASIC-projects/raw/master/Formatting.zip

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________________________________ From: countingpine <[email protected]> Sent: Monday, November 2, 2020 3:28 PM To: freebasic/fbc <[email protected]> Cc: srvaldez <[email protected]>; Author <[email protected]> Subject: Re: [freebasic/fbc] Format(0, "0.00e+00") returns 0.00e-01 (#92) I think I can fix this by simply preventing the line https://github.com/freebasic/fbc/blob/1.07.1/src/rtlib/str_format.c#L286<https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Ffreebasic%2Ffbc%2Fblob%2F1.07.1%2Fsrc%2Frtlib%2Fstr_format.c%23L286&data=04%7C01%7C%7C2b05f2682ec1430931a908d87f763996%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637399493025032057%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=apEY95%2FEEr5mTyYisaayyWGIDqUzghHhf3TeHS8pbnY%3D&reserved=0> from executing when value is zero. But I've found further oddities, e.g. with the format string 000e+0: 0.1234 -> 123e-3 0.0000 -> 000e-3 (or 000e+0 with the suggested fix) 1.2340 -> 001e+0 In the latter case it should presumably be 123e-2, but I don't currently have quick access to VB's Format to compare... — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub<https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Ffreebasic%2Ffbc%2Fissues%2F92%23issuecomment-720734635&data=04%7C01%7C%7C2b05f2682ec1430931a908d87f763996%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637399493025042061%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=ij07mnEDkidOcHkwIpwUDOzTyH40H4glZTcKZrBzQ4E%3D&reserved=0>, or unsubscribe<https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fnotifications%2Funsubscribe-auth%2FAHYJ3YIMKHEZKWI4H2Y2YFDSN4P7LANCNFSM4FNYDISQ&data=04%7C01%7C%7C2b05f2682ec1430931a908d87f763996%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637399493025042061%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=c%2F4PBKzxxScsyZFXP3zIQndWlWdiN37VCtRoGJa5%2B5c%3D&reserved=0>.

[countingpine]

Related thread: https://freebasic.net/forum/viewtopic.php?f=3&t=26921&p=250211
Adding more zeroes before the decimal point further decrements the exponent, e.g. format(0, "0000e+0") -> 0000e-4.
It seems to follow the same pattern as if 0.1 were used, e.g. format(0.1, "0000e+0") -> 1000e-4.

Ideally the exponent should probably always be 0. Probably just need to make zero a special case...

[countingpine]

I think I can fix this by simply preventing the line https://github.com/freebasic/fbc/blob/1.07.1/src/rtlib/str_format.c#L286 from executing when value is zero.
But I've found further oddities, e.g. with the format string 000e+0:
0.1234 -> 123e-3
0.0000 -> 000e-3 (or 000e+0 with the suggested fix)
1.2340 -> 001e+0

In the latter case it should presumably be 123e-2, but I don't currently have quick access to VB's Format to compare...

[jayrm]

Fixed by #272