46 lines
1.5 KiB
C
46 lines
1.5 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <dlfcn.h>
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#define MAX_LINE 4096
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typedef int (*replace_func_t)(char*, int, int*);
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int main(int argc, char *argv[]) {
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if (argc != 5) {
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fprintf(stderr, "Usage: %s <input.txt> <output.txt> <max_replacements> <libpath>\n", argv[0]);
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return 1;
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}
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FILE *fin = fopen(argv[1], "r");
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if (!fin) { perror("fopen input"); return 1; }
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FILE *fout = fopen(argv[2], "w");
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if (!fout) { perror("fopen output"); fclose(fin); return 1; }
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int cap = atoi(argv[3]);
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if (cap < 0) { fprintf(stderr, "invalid cap\n"); fclose(fin); fclose(fout); return 1; }
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void *lib = dlopen(argv[4], RTLD_LAZY);
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if (!lib) { fprintf(stderr, "dlopen error: %s\n", dlerror()); fclose(fin); fclose(fout); return 1; }
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replace_func_t replace = (replace_func_t) dlsym(lib, "replace_char_line");
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if (!replace) { fprintf(stderr, "dlsym error: %s\n", dlerror()); fclose(fin); fclose(fout); dlclose(lib); return 1; }
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int total = 0;
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char line[MAX_LINE];
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while (fgets(line, sizeof(line), fin)) {
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if (line[0] == '\0' || line[0] == '\n') {
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fputs(line, fout);
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continue;
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}
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int key = (unsigned char)line[0];
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if (cap > 0) {
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int repl_line = replace(line, key, &cap);
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total += repl_line;
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}
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fputc(line[0], fout);
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fputs(line + 1, fout);
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}
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fclose(fin); fclose(fout);
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dlclose(lib);
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printf("total_replacements: %d\n", total);
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return 0;
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} |