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| author | Marco Paland <marco@paland.com> | 2019-03-26 08:50:07 +0100 |
|---|---|---|
| committer | Marco Paland <marco@paland.com> | 2019-03-26 08:50:07 +0100 |
| commit | 1e288944e4e01d85a007562f5eca458bfcb2f9df (patch) | |
| tree | a0d57decbbe34c91a311525d1592a40880bb9d93 | |
| parent | 4012b45d7c3cca5b42507c77e3033322b5dfab3d (diff) | |
| download | printf-1e288944e4e01d85a007562f5eca458bfcb2f9df.tar.gz printf-1e288944e4e01d85a007562f5eca458bfcb2f9df.tar.bz2 printf-1e288944e4e01d85a007562f5eca458bfcb2f9df.zip | |
chore(readme): update readme to exp support
| -rw-r--r-- | README.md | 20 |
1 files changed, 10 insertions, 10 deletions
@@ -28,7 +28,7 @@ Therefore I decided to write an own, final implementation which meets the follow - Support of decimal/floating number representation (with an own fast itoa/ftoa)
- Reentrant and thread-safe, malloc free, no static vars/buffers
- LINT and compiler L4 warning free, mature, coverity clean, automotive ready
- - Extensive test suite (> 390 test cases) passing
+ - Extensive test suite (> 400 test cases) passing
- Simply the best *printf* around the net
- MIT license
@@ -162,19 +162,19 @@ int length = sprintf(NULL, "Hello, world"); // length is set to 12 | Name | Default value | Description |
|------|---------------|-------------|
-| PRINTF_INCLUDE_CONFIG_H | undefined | Define this as compiler switch (e.g. `gcc -DPRINTF_INCLUDE_CONFIG_H`) to include a "printf_config.h" definition file |
-| PRINTF_NTOA_BUFFER_SIZE | 32 | ntoa (integer) conversion buffer size. This must be big enough to hold one converted numeric number _including_ leading zeros, normally 32 is a sufficient value. Created on the stack |
-| PRINTF_FTOA_BUFFER_SIZE | 32 | ftoa (float) conversion buffer size. This must be big enough to hold one converted float number _including_ leading zeros, normally 32 is a sufficient value. Created on the stack |
-| PRINTF_DISABLE_SUPPORT_FLOAT | undefined | Define this to disable floating point (%f) support |
+| PRINTF_INCLUDE_CONFIG_H | undefined | Define this as compiler switch (e.g. `gcc -DPRINTF_INCLUDE_CONFIG_H`) to include a "printf_config.h" definition file |
+| PRINTF_NTOA_BUFFER_SIZE | 32 | ntoa (integer) conversion buffer size. This must be big enough to hold one converted numeric number _including_ leading zeros, normally 32 is a sufficient value. Created on the stack |
+| PRINTF_FTOA_BUFFER_SIZE | 32 | ftoa (float) conversion buffer size. This must be big enough to hold one converted float number _including_ leading zeros, normally 32 is a sufficient value. Created on the stack |
+| PRINTF_DEFAULT_FLOAT_PRECISION | 6 | Define the default floating point precision |
+| PRINTF_MAX_FLOAT | 1e9 | Define the largest suitable value to be printed with %f, before using exponential representation |
+| PRINTF_DISABLE_SUPPORT_FLOAT | undefined | Define this to disable floating point (%f) support |
| PRINTF_DISABLE_SUPPORT_EXPONENTIAL | undefined | Define this to disable exponential floating point (%e) support |
-| PRINTF_DISABLE_SUPPORT_LONG_LONG | undefined | Define this to disable long long (%ll) support |
-| PRINTF_DISABLE_SUPPORT_PTRDIFF_T | undefined | Define this to disable ptrdiff_t (%t) support |
+| PRINTF_DISABLE_SUPPORT_LONG_LONG | undefined | Define this to disable long long (%ll) support |
+| PRINTF_DISABLE_SUPPORT_PTRDIFF_T | undefined | Define this to disable ptrdiff_t (%t) support |
## Caveats
-- The internal floating point conversion has a maximum precision of 9 digits. Any higher precision is truncated after the 9th digit and zeros are returned.
- So `printf("%.12f", 42.89522312345678)` gives `42.895223123000`.
-- Exponential floating point format (e.g. `"%.10e"` to get `1.167e+65`) for large numbers is not supported yet. Sorry.
+None anymore (finally).
## Test Suite
|