mirror of
https://github.com/stenzek/duckstation.git
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71 lines
1.7 KiB
C
71 lines
1.7 KiB
C
#include <stdbool.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <alloca.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <fcntl.h>
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#if CPUINFO_MOCK
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#include <cpuinfo-mock.h>
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#endif
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#include <linux/api.h>
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#include <cpuinfo/log.h>
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bool cpuinfo_linux_parse_small_file(const char* filename, size_t buffer_size, cpuinfo_smallfile_callback callback, void* context) {
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int file = -1;
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bool status = false;
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char* buffer = (char*) alloca(buffer_size);
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#if CPUINFO_LOG_DEBUG_PARSERS
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cpuinfo_log_debug("parsing small file %s", filename);
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#endif
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#if CPUINFO_MOCK
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file = cpuinfo_mock_open(filename, O_RDONLY);
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#else
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file = open(filename, O_RDONLY);
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#endif
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if (file == -1) {
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cpuinfo_log_info("failed to open %s: %s", filename, strerror(errno));
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goto cleanup;
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}
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size_t buffer_position = 0;
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ssize_t bytes_read;
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do {
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#if CPUINFO_MOCK
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bytes_read = cpuinfo_mock_read(file, &buffer[buffer_position], buffer_size - buffer_position);
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#else
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bytes_read = read(file, &buffer[buffer_position], buffer_size - buffer_position);
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#endif
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if (bytes_read < 0) {
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cpuinfo_log_info("failed to read file %s at position %zu: %s", filename, buffer_position, strerror(errno));
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goto cleanup;
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}
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buffer_position += (size_t) bytes_read;
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if (buffer_position >= buffer_size) {
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cpuinfo_log_error("failed to read file %s: insufficient buffer of size %zu", filename, buffer_size);
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goto cleanup;
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}
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} while (bytes_read != 0);
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status = callback(buffer, &buffer[buffer_position], context);
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cleanup:
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if (file != -1) {
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#if CPUINFO_MOCK
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cpuinfo_mock_close(file);
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#else
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close(file);
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#endif
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file = -1;
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}
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return status;
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}
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