Exerc 7_6.

chapter_7.input_output/7_6.fcompare/Makefile

@@ -0,0 +1,3 @@
+BINARY=fcompare
+
+include ../../Exercise.mk

chapter_7.input_output/7_6.fcompare/main.c

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+# include <stdio.h>
+# include <stdlib.h>
+# include <string.h>
+
+/* file_open: open a file, and handle errors */
+FILE *file_open (char *name, char *mode, char *prog)
+{
+  FILE *fp;
+  if ((fp = fopen(name, mode)) == NULL) {
+    fprintf(stderr, "%s ERROR! Can't open %s.\n", prog, name);
+    exit(1);
+  }
+  return fp;
+}
+
+/* fgetline: read a line from a file, return length */
+int fgetline (FILE *fp, char *line, int max)
+{
+  return
+    fgets(line, max, fp) == NULL ?
+    0 : strlen(line);
+}
+
+# define MAXLINE 1024
+
+int main (int argc, char **argv)
+{
+  FILE *fp0, *fp1;
+  char line0[MAXLINE], line1[MAXLINE];
+  int len0, len1, n;
+
+  if (argc != 3) {
+    printf("%s syntax: <file-a> <file-b>\n", argv[0]);
+    return 0;
+  }
+  fp0 = file_open(argv[1], "r", argv[0]);
+  fp1 = file_open(argv[2], "r", argv[0]);
+
+  n = -1;
+  do {
+    n++;
+    len0 = fgetline(fp0, line0, MAXLINE);
+    len1 = fgetline(fp1, line1, MAXLINE);
+  } while (len0 > 0 && len1 > 0 && len0 == len1 && strcmp(line0, line1) == 0);
+
+  if (len0 != len1 || strcmp(line0, line1) != 0)
+    printf("Files differ, line %d:\n"
+           "%s: %s\n"
+           "%s: %s\n",
+           n,
+           argv[1], len0 == 0 ? "[EOF]" : line0,
+           argv[2], len1 == 0 ? "[EOF]" : line1);
+
+  fclose(fp0);
+  fclose(fp1);
+  return 0;
+}

chapter_7.input_output/7_6.fcompare/tests/0_err_syntax.targs

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+0_file0.c 0_file1.c 0_file2.c

chapter_7.input_output/7_6.fcompare/tests/0_err_syntax.tout

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+./fcompare syntax: <file-a> <file-b>

chapter_7.input_output/7_6.fcompare/tests/1_err_fopen.targs

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+1_file0.c 1_file1.c

chapter_7.input_output/7_6.fcompare/tests/1_err_fopen.terr

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+./fcompare ERROR! Can't open 1_file0.c.

chapter_7.input_output/7_6.fcompare/tests/2_same.targs

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+main.c main.c

chapter_7.input_output/7_6.fcompare/tests/3_diff.targs

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+tests/3_file0.c tests/3_file1.c

chapter_7.input_output/7_6.fcompare/tests/3_diff.tout

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+Files differ, line 25:
+tests/3_file0.c: int main (int argc, char **argv)
+
+tests/3_file1.c: int main (int argc,  char **argv)
+

chapter_7.input_output/7_6.fcompare/tests/3_file0.c

@@ -0,0 +1,57 @@
+# include <stdio.h>
+# include <stdlib.h>
+# include <string.h>
+
+/* file_open: open a file, and handle errors */
+FILE *file_open (char *name, char *mode, char *prog)
+{
+  FILE *fp;
+  if ((fp = fopen(name, mode)) == NULL) {
+    fprintf(stderr, "%s ERROR! Can't open %s.\n", prog, name);
+    exit(1);
+  }
+  return fp;
+}
+
+/* fgetline: read a line from a file, return length */
+int fgetline (FILE *fp, char *line, int max)
+{
+  return
+    fgets(line, max, fp) == NULL ?
+    0 : strlen(line);
+}
+
+# define MAXLINE 1024
+
+int main (int argc, char **argv)
+{
+  FILE *fp0, *fp1;
+  char line0[MAXLINE], line1[MAXLINE];
+  int len0, len1, n;
+
+  if (argc != 3) {
+    printf("%s syntax: <file-a> <file-b>\n", argv[0]);
+    return 0;
+  }
+  fp0 = file_open(argv[1], "r", argv[0]);
+  fp1 = file_open(argv[2], "r", argv[0]);
+
+  n = -1;
+  do {
+    n++;
+    len0 = fgetline(fp0, line0, MAXLINE);
+    len1 = fgetline(fp1, line1, MAXLINE);
+  } while (len0 > 0 && len1 > 0 && len0 == len1 && strcmp(line0, line1) == 0);
+
+  if (len0 != len1 || strcmp(line0, line1) != 0)
+    printf("Files differ, line %d:\n"
+           "%s: %s\n"
+           "%s: %s\n",
+           n,
+           argv[1], len0 == 0 ? "[EOF]" : line0,
+           argv[2], len1 == 0 ? "[EOF]" : line1);
+
+  fclose(fp0);
+  fclose(fp1);
+  return 0;
+}

chapter_7.input_output/7_6.fcompare/tests/3_file1.c

@@ -0,0 +1,57 @@
+# include <stdio.h>
+# include <stdlib.h>
+# include <string.h>
+
+/* file_open: open a file, and handle errors */
+FILE *file_open (char *name, char *mode, char *prog)
+{
+  FILE *fp;
+  if ((fp = fopen(name, mode)) == NULL) {
+    fprintf(stderr, "%s ERROR! Can't open %s.\n", prog, name);
+    exit(1);
+  }
+  return fp;
+}
+
+/* fgetline: read a line from a file, return length */
+int fgetline (FILE *fp, char *line, int max)
+{
+  return
+    fgets(line, max, fp) == NULL ?
+    0 : strlen(line);
+}
+
+# define MAXLINE 1024
+
+int main (int argc,  char **argv)
+{
+  FILE *fp0, *fp1;
+  char line0[MAXLINE], line1[MAXLINE];
+  int len0, len1, n;
+
+  if (argc != 3) {
+    printf("%s syntax: <file-a> <file-b>\n", argv[0]);
+    return 0;
+  }
+  fp0 = file_open(argv[1], "r", argv[0]);
+  fp1 = file_open(argv[2], "r", argv[0]);
+
+  n = -1;
+  do {
+    n++;
+    len0 = fgetline(fp0, line0, MAXLINE);
+    len1 = fgetline(fp1, line1, MAXLINE);
+  } while (len0 > 0 && len1 > 0 && len0 == len1 && strcmp(line0, line1) == 0);
+
+  if (len0 != len1 || strcmp(line0, line1) != 0)
+    printf("Files differ, line %d:\n"
+           "%s: %s\n"
+           "%s: %s\n",
+           n,
+           argv[1], len0 == 0 ? "[EOF]" : line0,
+           argv[2], len1 == 0 ? "[EOF]" : line1);
+
+  fclose(fp0);
+  fclose(fp1);
+  return 0;
+}

chapter_7.input_output/7_6.fcompare/tests/4_diff_eof.targs

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+tests/4_file0.c tests/4_file1.c

chapter_7.input_output/7_6.fcompare/tests/4_diff_eof.tout

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+Files differ, line 16:
+tests/4_file0.c: int fgetline (FILE *fp, char *line, int max)
+
+tests/4_file1.c: [EOF]

chapter_7.input_output/7_6.fcompare/tests/4_file0.c

@@ -0,0 +1,57 @@
+# include <stdio.h>
+# include <stdlib.h>
+# include <string.h>
+
+/* file_open: open a file, and handle errors */
+FILE *file_open (char *name, char *mode, char *prog)
+{
+  FILE *fp;
+  if ((fp = fopen(name, mode)) == NULL) {
+    fprintf(stderr, "%s ERROR! Can't open %s.\n", prog, name);
+    exit(1);
+  }
+  return fp;
+}
+
+/* fgetline: read a line from a file, return length */
+int fgetline (FILE *fp, char *line, int max)
+{
+  return
+    fgets(line, max, fp) == NULL ?
+    0 : strlen(line);
+}
+
+# define MAXLINE 1024
+
+int main (int argc, char **argv)
+{
+  FILE *fp0, *fp1;
+  char line0[MAXLINE], line1[MAXLINE];
+  int len0, len1, n;
+
+  if (argc != 3) {
+    printf("%s syntax: <file-a> <file-b>\n", argv[0]);
+    return 0;
+  }
+  fp0 = file_open(argv[1], "r", argv[0]);
+  fp1 = file_open(argv[2], "r", argv[0]);
+
+  n = -1;
+  do {
+    n++;
+    len0 = fgetline(fp0, line0, MAXLINE);
+    len1 = fgetline(fp1, line1, MAXLINE);
+  } while (len0 > 0 && len1 > 0 && len0 == len1 && strcmp(line0, line1) == 0);
+
+  if (len0 != len1 || strcmp(line0, line1) != 0)
+    printf("Files differ, line %d:\n"
+           "%s: %s\n"
+           "%s: %s\n",
+           n,
+           argv[1], len0 == 0 ? "[EOF]" : line0,
+           argv[2], len1 == 0 ? "[EOF]" : line1);
+
+  fclose(fp0);
+  fclose(fp1);
+  return 0;
+}

chapter_7.input_output/7_6.fcompare/tests/4_file1.c

@@ -0,0 +1,16 @@
+# include <stdio.h>
+# include <stdlib.h>
+# include <string.h>
+
+/* file_open: open a file, and handle errors */
+FILE *file_open (char *name, char *mode, char *prog)
+{
+  FILE *fp;
+  if ((fp = fopen(name, mode)) == NULL) {
+    fprintf(stderr, "%s ERROR! Can't open %s.\n", prog, name);
+    exit(1);
+  }
+  return fp;
+}
+
+/* fgetline: read a line from a file, return length */