X-Git-Url: https://fleuret.org/cgi-bin/gitweb/gitweb.cgi?a=blobdiff_plain;f=mymail.c;h=6388365093510e913221db4b9e8fd5f8f7f9cef8;hb=319a695493cac88fc6b14541d30ae0107f38caf9;hp=25121a4f61432ca71c049ed1bf5221f95a4e0719;hpb=5166266bf624c0a4d94d7751bb819c26cc1cc22d;p=mymail.git

diff --git a/mymail.c b/mymail.c
index 25121a4..6388365 100644
--- a/mymail.c
+++ b/mymail.c
@@ -47,6 +47,18 @@ char *search_pattern;
 
 int action_index;
 
+char *segment_next_field(char *current) {
+  while(*current && *current != ' ') current++;
+  *current = '\0'; current++;
+  while(*current && *current == ' ') current++;
+  return current;
+}
+
+void remove_eof(char *c) {
+  while(*c && *c != '\n' && *c != '\r') c++;
+  *c = '\0';
+}
+
 /********************************************************************/
 
 /* malloc with error checking.  */
@@ -71,6 +83,71 @@ void usage(FILE *out) {
   fprintf(out, "\n");
 }
 
+/*********************************************************************/
+
+void search_in_db(const char *search_name, const char *search_regexp_string,
+                  FILE *db_file) {
+  char raw_line[BUFFER_SIZE];
+  char current_mail_filename[BUFFER_SIZE];
+  unsigned int current_position_in_mail;
+  char *name, *value;
+  regex_t regexp;
+  int already_written;
+
+  if(regcomp(&regexp,
+             search_regexp_string,
+             REG_ICASE)) {
+    fprintf(stderr,
+            "mymail: Syntax error in regexp \"%s\" for field \"%s\".\n",
+            search_regexp_string,
+            search_name);
+    exit(EXIT_FAILURE);
+  }
+
+  current_position_in_mail = 0;
+  already_written = 0;
+
+  while(fgets(raw_line, BUFFER_SIZE, db_file)) {
+    name = raw_line;
+    value = segment_next_field(raw_line);
+
+    /* printf("LINE [%s] %s", name, value); */
+
+    if(strcmp("mail", name) == 0) {
+      char *position_in_file_string = value;
+      char *mail_filename = segment_next_field(value);
+      current_position_in_mail = atoi(position_in_file_string);
+      strcpy(current_mail_filename, mail_filename);
+      remove_eof(current_mail_filename);
+      /* printf("READING [%s]\n", current_mail_filename); */
+      already_written = 0;
+    } else if(!already_written) {
+      if(strcmp(search_name, name) == 0 && regexec(&regexp, value, 0, 0, 0) == 0) {
+        FILE *mail_file;
+        /* printf("%s:%u\n", current_mail_filename, current_position_in_mail); */
+        mail_file = fopen(current_mail_filename, "r");
+        if(!mail_file) {
+          fprintf(stderr, "mymail: Can not open `%s'.\n", current_mail_filename);
+          exit(EXIT_FAILURE);
+        }
+        fseek(mail_file, current_position_in_mail, SEEK_SET);
+        if(fgets(raw_line, BUFFER_SIZE, mail_file)) {
+          printf("%s", raw_line);
+          while(fgets(raw_line, BUFFER_SIZE, mail_file) &&
+                strncmp(raw_line, "From ", 5)) {
+            printf("%s", raw_line);
+          }
+        }
+        fclose(mail_file);
+        already_written = 1;
+      }
+    }
+  }
+}
+
+
+/*********************************************************************/
+
 void read_file(const char *input_filename,
                int nb_fields_to_parse, struct parsable_field *fields_to_parse,
                FILE *db_file) {
@@ -116,7 +193,7 @@ void read_file(const char *input_filename,
       int f;
       regmatch_t matches;
       if(new_header) {
-        fprintf(db_file, "mail %s:%d\n", input_filename, position_in_file);
+        fprintf(db_file, "mail %u %s\n", position_in_file, input_filename);
         new_header = 0;
       }
       for(f = 0; f < nb_fields_to_parse; f++) {
@@ -306,22 +383,35 @@ int main(int argc, char **argv) {
 
   else {
     if(search_pattern) {
+      FILE *db_file;
       char *search_name;
-      char *search_regexp;
+      char *search_regexp_string;
       search_name = search_pattern;
-      search_regexp = search_pattern;
-      while(*search_regexp && *search_regexp != ' ') search_regexp++;
-      *search_regexp = '\0'; search_regexp++;
-      while(*search_regexp && *search_regexp == ' ') search_regexp++;
-      if(!*search_regexp) {
+      search_regexp_string = segment_next_field(search_pattern);
+      if(!*search_regexp_string) {
         fprintf(stderr,
                 "Syntax error in the search pattern.\n");
         exit(EXIT_FAILURE);
       }
-      printf("Starting search in %s for field \"%s\" matching \"%s\".\n",
-             db_filename,
-             search_name,
-             search_regexp);
+
+      /* printf("Starting search in %s for field \"%s\" matching \"%s\".\n", */
+             /* db_filename, */
+             /* search_name, */
+             /* search_regexp_string); */
+
+      db_file = fopen(db_filename, "r");
+
+      if(!db_file) {
+        fprintf(stderr,
+                "mymail: Can not open \"%s\" for reading: %s\n",
+                db_filename,
+                strerror(errno));
+        exit(EXIT_FAILURE);
+      }
+
+      search_in_db(search_name, search_regexp_string, db_file);
+
+      fclose(db_file);
       free(search_pattern);
     }
   }