45 lines
1.3 KiB
Plaintext
45 lines
1.3 KiB
Plaintext
type file-state {
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source: (handle buffered-file)
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eof?: boolean
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}
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fn init-file-state _self: (addr file-state), filename: (addr array byte) {
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var self/eax: (addr file-state) <- copy _self
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load-file self, filename
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var eof/eax: (addr boolean) <- get self, eof?
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copy-to *eof, 0 # false
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}
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fn load-file _self: (addr file-state), filename: (addr array byte) {
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var self/eax: (addr file-state) <- copy _self
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var out/esi: (addr handle buffered-file) <- get self, source
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open filename, 0, out # 0 = read mode
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}
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fn next-char _self: (addr file-state) -> result/eax: byte {
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var self/ecx: (addr file-state) <- copy _self
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var source/eax: (addr handle buffered-file) <- get self, source
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var in/eax: (addr buffered-file) <- lookup *source
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result <- read-byte-buffered in
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# if result == EOF, set eof?
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compare result, 0xffffffff # EOF marker
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{
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var eof/ecx: (addr boolean) <- get self, eof?
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copy-to *eof, 1 # true
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}
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}
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fn done-reading? _self: (addr file-state) -> result/eax: boolean {
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var self/eax: (addr file-state) <- copy _self
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var eof/eax: (addr boolean) <- get self, eof?
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result <- copy *eof
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}
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fn dump in: (addr buffered-file) {
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var c/eax: byte <- read-byte-buffered in
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compare c, 0xffffffff # EOF marker
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break-if-=
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print-byte c
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loop
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}
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