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/* Generated by re2c */ // re2c $INPUT -o $OUTPUT -i #include <assert.h> #include <stdio.h> #include <stdlib.h> #define YYMAXFILL 4 static int lex(const char *YYCURSOR) { const char *YYMARKER, *n, *p, *u, *g, *f, *h, *c; const char *yyt1;const char *yyt2;const char *yyt3;const char *yyt4;const char *yyt5;const char *yyt6;const char *yyt7; for (;;) { { char yych; yych = *YYCURSOR; switch (yych) { case 0x00: goto yy1; case '\n': case ':': goto yy4; default: yyt1 = YYCURSOR; goto yy2; } yy1: ++YYCURSOR; { return 0; } yy2: yych = *(YYMARKER = ++YYCURSOR); switch (yych) { case 0x00: case '\n': goto yy3; default: goto yy6; } yy3: { fprintf(stderr, "error\n"); return 1; } yy4: ++YYCURSOR; goto yy3; yy5: yych = *++YYCURSOR; yy6: switch (yych) { case 0x00: case '\n': goto yy7; case ':': goto yy8; default: goto yy5; } yy7: YYCURSOR = YYMARKER; goto yy3; yy8: yych = *++YYCURSOR; switch (yych) { case 0x00: case '\n': goto yy7; case ':': yyt2 = YYCURSOR; goto yy10; default: yyt2 = YYCURSOR; goto yy9; } yy9: yych = *++YYCURSOR; switch (yych) { case 0x00: case '\n': goto yy7; case ':': goto yy10; default: goto yy9; } yy10: yych = *++YYCURSOR; switch (yych) { case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': yyt3 = YYCURSOR; goto yy11; default: goto yy7; } yy11: yych = *++YYCURSOR; switch (yych) { case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': goto yy11; case ':': goto yy12; default: goto yy7; } yy12: yych = *++YYCURSOR; switch (yych) { case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': yyt4 = YYCURSOR; goto yy13; default: goto yy7; } yy13: yych = *++YYCURSOR; switch (yych) { case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': goto yy13; case ':': goto yy14; default: goto yy7; } yy14: yych = *++YYCURSOR; switch (yych) { case 0x00: case '\n': goto yy7; case ':': yyt5 = YYCURSOR; goto yy16; default: yyt5 = YYCURSOR; goto yy15; } yy15: yych = *++YYCURSOR; switch (yych) { case 0x00: case '\n': goto yy7; case ':': goto yy16; default: goto yy15; } yy16: yych = *++YYCURSOR; switch (yych) { case '/': yyt6 = YYCURSOR; goto yy17; default: goto yy7; } yy17: yych = *++YYCURSOR; switch (yych) { case 0x00: case '\n': goto yy7; case ':': goto yy18; default: goto yy17; } yy18: yych = *++YYCURSOR; switch (yych) { case '/': yyt7 = YYCURSOR; goto yy19; default: goto yy7; } yy19: yych = *++YYCURSOR; switch (yych) { case 0x00: case ':': goto yy7; case '\n': goto yy20; default: goto yy19; } yy20: ++YYCURSOR; n = yyt1; p = yyt2; u = yyt3; g = yyt4; f = yyt5; h = yyt6; c = yyt7; { fprintf(stderr, "user: %.*s\n", (int)(p - n) - 1, n); fprintf(stderr, "password: %.*s\n", (int)(u - p) - 1, p); fprintf(stderr, "UID: %.*s\n", (int)(g - u) - 1, u); fprintf(stderr, "GID: %.*s\n", (int)(f - g) - 1, g); fprintf(stderr, "info: %.*s\n", (int)(h - f) - 1, f); fprintf(stderr, "home: %.*s\n", (int)(c - h) - 1, h); fprintf(stderr, "command: %.*s\n", (int)(YYCURSOR - c - 1), c); fprintf(stderr, "\n"); continue; } } } } int main() { const char *fname = "etc_passwd"; FILE *f; // prepare input file f = fopen(fname, "w"); fprintf(f, "root:x:0:0:root:/root:/bin/bash\n" "bin:x:1:1:bin:/bin:/bin/false\n" "portage:x:250:250:portage:/var/tmp/portage:/bin/false\n"); fclose(f); // read input file into buffer f = fopen(fname, "r"); fseek(f, 0, SEEK_END); const size_t fsize = (size_t) ftell(f); fseek(f, 0, SEEK_SET); char *buffer = (char*) malloc(fsize + 1); fread(buffer, 1, fsize, f); buffer[fsize] = 0; fclose(f); assert(lex(buffer) == 0); // cleanup remove(fname); free(buffer); return 0; }