refactor

1 files changed, 126 insertions, 0 deletions

diff --git a/lib/convert.c b/lib/convert.c
new file mode 100644
index 0000000..071268e
--- /dev/null
+++ b/lib/convert.c
@@ -0,0 +1,126 @@
+#include "convert.h"
+#include "error.h"
+
+#include <ctype.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+long int get_number(const char* text) {
+    char* end;
+    long int n = strtol(text, &end, 10);
+    if (text == end) {
+        error("%s is not a valid number", text);
+    }
+    return n;
+}
+
+long int get_blkm(const char* text) {
+    char* end;
+    long int n = strtol(text, &end, 10);
+    if (text == end) {
+        error("%s is not a valid bkm", text);
+    }
+    if (*end == '\0') return n;
+    switch (*end) {
+        case 'K':
+        case 'k':
+            return n * 1024;
+        case 'B':
+        case 'b':
+            return n * 512;
+        case 'M':
+        case 'm':
+            return n * 1024 * 1204;
+        default:
+            error("invalid bkm type %c", *end);
+    }
+    
+    /* shouldnt get here anyways */
+    return 0;
+}
+
+mode_t get_mode(const char* next) {
+    char* end = NULL;
+    mode_t mode = (mode_t)strtol(next, &end, 8);
+    if (!end) return 0;
+    while(isspace(*end)) end++;
+    if (*end != '\0' || (unsigned) mode < 010000) {
+        error("invalid file mode: `%s`", next);
+    }
+    return mode;
+}
+
+bool streql(const char* a, const char* b) {
+    int n = 0;
+
+    if (*a != *b) return false;
+    
+    while (true) {
+        if (*(a+n) != *(b+n)) return false;
+        if (*(a+n) == '\0') return true;
+        ++n;
+    }
+}
+
+bool prefix(const char* pre, const char* str) {
+    return strncmp(pre, str, strlen(pre)) == 0;
+}
+
+static char fs_types[5] = {'K','M','G','T','P'};
+void print_file_size(size_t bytes, char buf[5]) {
+    int index, n;
+    float next;
+
+    index = 0;
+    next = bytes;
+    
+    while (true) {
+        if (next < 1000) {
+            break;
+        }
+        
+        if (index == 5) {
+            printf("999P");
+            return;
+        }
+        
+        next /= 1024;
+        index++;
+    }
+    
+    n = snprintf(buf, 4, "%u", (int)(next+.5));
+    
+    if (index > 0) {
+        buf[n] = (fs_types[index - 1]);
+        n++;
+    }
+    
+    buf[n] = '\0';
+}
+
+static char* months[12] = 
+    {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
+void print_date_time(time_t mills, char buf[13]) {
+    struct tm* info;
+    int n;
+
+    info = localtime(&mills);
+    n = snprintf(buf, 5, "%s ", months[info->tm_mon]);
+
+    if (info->tm_mday < 10) {
+        buf[n] = ' ';
+        n++;
+    }
+
+    snprintf(buf + n, 13 - n, "%d %02d:%02d ", info->tm_mday, info->tm_hour, info->tm_sec);
+}
+
+void print_file_path(char* path) {
+    if (streql("-", path)) {
+        printf("(standard input)");
+    } else {
+        printf("%s", path);
+    }
+}