This is an excerpt of the latest version of icoutils (0.29.1). More
specifically out of the wrestool/main.c file. This C-Code will be run
for every file you pass as an argument to wrestool:
/* get file size */
fi.name = argv[c];
fi.total_size = file_size(fi.name);
[...]
/* open file */
fi.file = fopen(fi.name, "rb");
[...]
/* read all of file */
fi.memory = xmalloc(fi.total_size);
if (fread(fi.memory, fi.total_size, 1, fi.file) != 1)
As promised, it will try to read ALL of the file into memory. Doing this
with large self-extracting archives for example is a no-go.
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https://bugs.launchpad.net/bugs/614918
Title:
Terrible wrestool performance with very large executables
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