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pigweed / pigweed / pigweed / 3bac75d77b9b492f23243f66f1e332f3fbd64c8c
commit3bac75d77b9b492f23243f66f1e332f3fbd64c8c[log] [tgz]
authorEli Lipsitz <elipsitz@google.com>Mon Aug 15 18:20:27 2022 +0000
committerCQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com>Mon Aug 15 18:20:27 2022 +0000
tree9423218cb9d415341a3668d0feb671d43c796c51
parent26e210529ec4d3904e6c9c4d9f112b273cb0872a [diff]
pw_stream: Implement StdFileReader::ConservativeLimit

The ConservativeLimit method returns an estimate of how much data is
available to be read or written in a pw::stream. The default
implementation returns a very large value ("unlimited").

This commit implements a file-specific implementation for StdFileReader.
It determines the size of the file (and thus how much data is left to
read) by seeking to the end and getting the current file position. This
makes the ConservativeReadLimit method much more useful for users of the
class.

Change-Id: I55b2518d3dc17ca8c4f98847dc7c3557eb9fda74
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/106130
Commit-Queue: Auto-Submit <auto-submit@pigweed.google.com.iam.gserviceaccount.com>
Reviewed-by: Wyatt Hepler <hepler@google.com>
Pigweed-Auto-Submit: Eli Lipsitz <elipsitz@google.com>
3 files changed
tree: 9423218cb9d415341a3668d0feb671d43c796c51
  1. build_overrides/
  2. docker/
  3. docs/
  4. pw_allocator/
  5. pw_analog/
  6. pw_android_toolchain/
  7. pw_arduino_build/
  8. pw_assert/
  9. pw_assert_basic/
  10. pw_assert_log/
  11. pw_assert_tokenized/
  12. pw_assert_zephyr/
  13. pw_base64/
  14. pw_bloat/
  15. pw_blob_store/
  16. pw_bluetooth/
  17. pw_bluetooth_hci/
  18. pw_boot/
  19. pw_boot_cortex_m/
  20. pw_build/
  21. pw_build_info/
  22. pw_build_mcuxpresso/
  23. pw_bytes/
  24. pw_checksum/
  25. pw_chrono/
  26. pw_chrono_embos/
  27. pw_chrono_freertos/
  28. pw_chrono_stl/
  29. pw_chrono_threadx/
  30. pw_chrono_zephyr/
  31. pw_cli/
  32. pw_compilation_testing/
  33. pw_console/
  34. pw_containers/
  35. pw_cpu_exception/
  36. pw_cpu_exception_cortex_m/
  37. pw_crypto/
  38. pw_digital_io/
  39. pw_docgen/
  40. pw_doctor/
  41. pw_env_setup/
  42. pw_file/
  43. pw_function/
  44. pw_fuzzer/
  45. pw_hdlc/
  46. pw_hex_dump/
  47. pw_i2c/
  48. pw_i2c_mcuxpresso/
  49. pw_interrupt/
  50. pw_interrupt_cortex_m/
  51. pw_interrupt_zephyr/
  52. pw_kvs/
  53. pw_libc/
  54. pw_log/
  55. pw_log_android/
  56. pw_log_basic/
  57. pw_log_null/
  58. pw_log_rpc/
  59. pw_log_string/
  60. pw_log_tokenized/
  61. pw_log_zephyr/
  62. pw_malloc/
  63. pw_malloc_freelist/
  64. pw_metric/
  65. pw_minimal_cpp_stdlib/
  66. pw_module/
  67. pw_multisink/
  68. pw_package/
  69. pw_persistent_ram/
  70. pw_polyfill/
  71. pw_preprocessor/
  72. pw_presubmit/
  73. pw_protobuf/
  74. pw_protobuf_compiler/
  75. pw_random/
  76. pw_result/
  77. pw_ring_buffer/
  78. pw_router/
  79. pw_rpc/
  80. pw_rust/
  81. pw_snapshot/
  82. pw_software_update/
  83. pw_span/
  84. pw_spi/
  85. pw_status/
  86. pw_stm32cube_build/
  87. pw_stream/
  88. pw_string/
  89. pw_symbolizer/
  90. pw_sync/
  91. pw_sync_baremetal/
  92. pw_sync_embos/
  93. pw_sync_freertos/
  94. pw_sync_stl/
  95. pw_sync_threadx/
  96. pw_sync_zephyr/
  97. pw_sys_io/
  98. pw_sys_io_arduino/
  99. pw_sys_io_baremetal_lm3s6965evb/
  100. pw_sys_io_baremetal_stm32f429/
  101. pw_sys_io_emcraft_sf2/
  102. pw_sys_io_mcuxpresso/
  103. pw_sys_io_stdio/
  104. pw_sys_io_stm32cube/
  105. pw_sys_io_zephyr/
  106. pw_system/
  107. pw_target_runner/
  108. pw_thread/
  109. pw_thread_embos/
  110. pw_thread_freertos/
  111. pw_thread_stl/
  112. pw_thread_threadx/
  113. pw_tls_client/
  114. pw_tls_client_boringssl/
  115. pw_tls_client_mbedtls/
  116. pw_tokenizer/
  117. pw_tool/
  118. pw_toolchain/
  119. pw_trace/
  120. pw_trace_tokenized/
  121. pw_transfer/
  122. pw_unit_test/
  123. pw_varint/
  124. pw_watch/
  125. pw_web/
  126. pw_work_queue/
  127. targets/
  128. third_party/
  129. ts/
  130. zephyr/
  131. .dockerignore ⇨ .gitignore
  132. activate.sh ⇨ bootstrap.sh
  133. .bazelignore
  134. .bazelrc
  135. .clang-format
  136. .clang-tidy
  137. .eslintrc.json
  138. .gitattributes
  139. .gitignore
  140. .gn
  141. .prettierrc.js
  142. .pylintrc
  143. activate.bat
  144. Android.bp
  145. AUTHORS
  146. bootstrap.bat
  147. bootstrap.sh
  148. BUILD.bazel
  149. BUILD.gn
  150. BUILDCONFIG.gn
  151. CMakeLists.txt
  152. jest.config.ts
  153. Kconfig.zephyr
  154. LICENSE
  155. modules.gni
  156. OWNERS
  157. package-lock.json
  158. package.json
  159. PIGWEED_MODULES
  160. PW_PLUGINS
  161. README.md
  162. rollup.config.js
  163. tsconfig.json
  164. WORKSPACE
README.md

Pigweed

Pigweed is an open source collection of embedded-targeted libraries–or as we like to call them, modules. These modules are building blocks and infrastructure that enable faster and more reliable development on small-footprint MMU-less 32-bit microcontrollers like the STMicroelectronics STM32L452 or the Nordic nRF52832.

For more information please see our website: https://pigweed.dev/.

Links