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lib: eliminate size_t casts

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Add new functions in `curlx/warnless.h` for controlled type
conversions:

* curlx_uitouz, convert unsigned into to size_t (should always work)
* curlx_uztoso, convert size_t to curl_off_t, capping at CURL_OFF_T_MAX
* curlx_sztouz, convert ssize_t to size_t, return TRUE when ok
* curlx_sotouz_range, convert curl_off_t to size_t interval, capping
  values to interval bounds

Remove some unnecesary casts, convert some internal recv functions
to the "return result, have size_t* arg" pattern.

Closes #19495
This commit is contained in:
Stefan Eissing 2025-11-12 15:58:49 +01:00 • committed by Daniel Stenberg
parent 78a610cb83
commit cb2bcb681f
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13 changed files with 170 additions and 156 deletions
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4
lib/dict.c
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@ -160,9 +160,9 @@ static CURLcode sendf(struct Curl_easy *data, const char *fmt, ...)
if(result)
break;
Curl_debug(data, CURLINFO_DATA_OUT, sptr, (size_t)bytes_written);
Curl_debug(data, CURLINFO_DATA_OUT, sptr, bytes_written);
if((size_t)bytes_written != write_len) {
if(bytes_written != write_len) {
/* if not all was written at once, we must advance the pointer, decrease
the size left and try again! */
write_len -= bytes_written;