View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0000881 | LDMud 3.6 | Efuns | public | 2020-08-06 01:24 | 2020-09-01 22:40 |
| Reporter | humni | Assigned To | Gnomi | ||
| Priority | low | Severity | minor | Reproducibility | always |
| Status | resolved | Resolution | fixed | ||
| Fixed in Version | 3.6.3 | ||||
| Summary | 0000881: sprintf problems concerning ANSI-Codecs | ||||
| Description | In Morgengrauen, we have ANSI-Codecs which change the colour of the code. They have a "size" (meaning: sizeof(ANSI_BOLD) has a value>0). But of course, there is no character if you see the text displayed, just a change in the color. If you now use sprintf on some "coloured" strings, the behaviour is not consistent: sprintf("%-*s%s\n",22,ANSI_BLUE+ANSI_BOLD+"Text"+ANSI_NORMAL,"Text") will return a blue Text with 18 following Spaces, followed by Text. This is how I would expect sprintf to work. But sprintf("%-*s%s\n",12,ANSI_BLUE+ANSI_BOLD+"Text"+ANSI_NORMAL,"Text") will return TextText with the first Text blue and the second Text not. Probably this happens because sprintf thinks the first Text is longer than 12 characters and doesn't change it. This may be, because sizeof(ANSI_BOLD+ANSI_BLUE+"Text"+ANSI_NORMAL); is 18. | ||||
| Steps To Reproduce | Using a Morgengrauen Mudlib, you may use this code: #include <ansi.h> #define TI this_interactive() protected void create() { tell_object(TI,"01234567890123456789012345678900123456789012345678901234567890\n"); tell_object(TI,sprintf("%-*s%s\n",22,ANSI_BLUE+ANSI_BOLD+"Text"+ANSI_NORMAL,"QTEXT")); tell_object(TI,sprintf("%d\n",sizeof(ANSI_BLUE+ANSI_BOLD+"Text"+ANSI_NORMAL+"\n"))); tell_object(TI,sprintf("%-*s%s\n",12,ANSI_BLUE+ANSI_BOLD+"Text"+ANSI_NORMAL,"QTEXT")); } and then just load the object. The 18 is the length mentioned above. The first line (after the numbers to see how long the string is) seems to be as expected, the last line is not. As a Morgengrauen mage, you may just load the object from /players/humni/temp/test1.c | ||||
| Tags | sprintf | ||||
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Additional info - the defines are as follows: #define ANSI_BOLD "ESC[1m" #define ANSI_BLUE "ESC[34m" #define ANSI_NORMAL "ESC[0m" |
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I fixed this in my 363preparations branch that will eventually go into LDMud 3.6.3: https://github.com/amotzkau/ldmud/commit/701ff0710ddd42ef27afb5b93ce8f6294a991a49 |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2020-08-06 01:24 | humni | New Issue | |
| 2020-08-06 01:24 | humni | Tag Attached: sprintf | |
| 2020-08-06 01:29 | zesstra | Project | LDMud => LDMud 3.6 |
| 2020-08-06 01:53 | zesstra | Note Added: 0002538 | |
| 2020-08-06 12:12 | Gnomi | Note Added: 0002539 | |
| 2020-09-01 22:40 | Gnomi | Assigned To | => Gnomi |
| 2020-09-01 22:40 | Gnomi | Status | new => assigned |
| 2020-09-01 22:40 | Gnomi | Status | assigned => resolved |
| 2020-09-01 22:40 | Gnomi | Resolution | open => fixed |
| 2020-09-01 22:40 | Gnomi | Fixed in Version | => 3.6.3 |
