Dependencies are finally installable

1 files changed, 115 insertions, 0 deletions

diff --git a/deps.c b/deps.c
new file mode 100644
index 0000000..7eb587f
--- /dev/null
+++ b/deps.c
@@ -0,0 +1,115 @@
+//
+// Created by jhunk on 12/16/19.
+//
+#include "spm.h"
+
+int exists(const char *filename) {
+    return access(filename, F_OK);
+}
+
+int dep_seen(Dependencies **deps, const char *name) {
+    if (!deps) {
+        return -1;
+    }
+    for (int i = 0; i != (*deps)->records; i++) {
+        if (strstr((*deps)->list[i], name) != NULL) {
+            return 1;
+        }
+    }
+    return 0;
+}
+
+int dep_init(Dependencies **deps) {
+    (*deps) = (Dependencies *)calloc(1, sizeof(Dependencies));
+    (*deps)->__size = 2;
+    (*deps)->records = 0;
+    (*deps)->list = (char **)calloc((*deps)->__size, sizeof(char *));
+    if (!(*deps)->list) {
+        return -1;
+    }
+    return 0;
+}
+
+void dep_free(Dependencies **deps) {
+    if ((*deps) != NULL) {
+        return;
+    }
+    for (int i = 0; i < (*deps)->__size; i++) {
+        if ((*deps)->list[i] != NULL) {
+            free((*deps)->list[i]);
+        }
+    }
+    free((*deps));
+}
+
+int dep_append(Dependencies **deps, char *name) {
+    if (!(*deps)) {
+        return -1;
+    }
+    (*deps)->__size++;
+    (*deps)->list = (char **)realloc((*deps)->list, sizeof(char *) * (*deps)->__size);
+    if (!(*deps)->list) {
+        return -1;
+    }
+    (*deps)->list[(*deps)->records] = (char *)calloc(strlen(name) + 1, sizeof(char));
+    if (!(*deps)->list[(*deps)->records]) {
+        return -1;
+    }
+    strcpy((*deps)->list[(*deps)->records], name);//, strlen(name));
+    (*deps)->records++;
+    return 0;
+}
+
+int dep_solve(Dependencies **deps, const char *filename) {
+    if (!(*deps)) {
+        return -1;
+    }
+    if (exists(filename) != 0) {
+        return -1;
+    }
+    FILE *fp = fopen(filename, "r");
+    if (!fp) {
+        perror(filename);
+        return -1;
+    }
+
+    char data[BUFSIZ];
+    memset(data, '\0', sizeof(data));
+
+    char *line = data;
+    int line_count = 0;
+    while (fgets(line, BUFSIZ, fp) != NULL) {
+        size_t line_length = strlen(line);
+        if (line_length > 1 && strstr(line, "\r\n")) {
+            line[line_length - 2] = '\0';
+        }
+        if (line_length > 1 && line[line_length - 1] == '\n') {
+            line[line_length - 1] = '\0';
+        }
+        if (strcmp(line, "") == 0) {
+            continue;
+        }
+        line_count++;
+        if (dep_seen(deps, line) > 0) {
+            // Already seen this dependency. Skip it.
+            continue;
+        }
+        else {
+            // Have not seen this dependency before
+            if (dep_append(deps, line) == 0) {
+                dep_solve(deps, line);
+            }
+        }
+    }
+    fclose(fp);
+    return line_count;
+}
+
+void dep_show(Dependencies **deps) {
+    if ((*deps) == NULL) {
+        return;
+    }
+    for (int i = 0; i < (*deps)->records; i++) {
+        printf("%d: %s\n", i, (*deps)->list[i]);
+    }
+}