betaur

[WIP] A better AUR helper written in C
git clone git@nonplanar.org:betaur.git
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dependency.c (1948B)

      1 #include <alpm.h>
      2 #include <stdlib.h>
      3 #include <string.h>
      4 #include <assert.h>
      5 
      6 #include "dependency.h"
      7 
      8 betaur_dependency_t* betaur_dependency_create(size_t depstring_len, char* depstring) {
      9 	betaur_dependency_t* bdep = (betaur_dependency_t *) malloc(sizeof(betaur_dependency_t));
     10 	char* pos;
     11 	bdep->depstring = depstring;
     12 	bdep->name = depstring;
     13 	bdep->mod = BETAUR_ANY;
     14 	assert(bdep != NULL);
     15 	if (pos = strstr(depstring, "<=")) {
     16 
     17 		bdep->mod = BETAUR_LE;
     18 		bdep->name_len = (size_t) (pos - depstring);
     19 		bdep->version = pos + 2;
     20 		bdep->version_len = (size_t) depstring_len - bdep->name_len - 2;
     21 	} else if (pos = strstr(depstring, ">=")) {
     22 		bdep->mod = BETAUR_GE;
     23 		bdep->name_len = (size_t) (pos - depstring);
     24 		bdep->version = pos + 2;
     25 		bdep->version_len = (size_t) depstring_len - bdep->name_len - 2;
     26 	} else {
     27 		for (pos = depstring; pos < (depstring + depstring_len); pos++) {
     28 			switch  (*pos) {
     29 				case '<':
     30 					bdep->mod = BETAUR_LT;
     31 					break;
     32 				case '>':
     33 					bdep->mod = BETAUR_GT;
     34 					break;
     35 				case '=':
     36 					bdep->mod = BETAUR_EQ;
     37 					break;
     38 			}
     39 		}
     40 		if (bdep->mod != BETAUR_ANY) {
     41 			bdep->name_len = (size_t) (pos - depstring);
     42 			bdep->version = pos + 1;
     43 			bdep->version_len = (size_t) depstring_len - bdep->name_len - 1;
     44 		} else {
     45 			bdep->name = depstring;
     46 		}
     47 	}
     48 
     49 	return bdep;
     50 }
     51 
     52 
     53 bool betaur_satisfied_by_version(betaur_dependency_t* bdep, const char* version) {
     54 	// FIXME we may need to make a copy here
     55 	// This will most probably crash when reading input from files
     56 	int vercmp = alpm_pkg_vercmp(version, bdep->version);
     57 	// TODO can't we just return vercmp??? hmmm...
     58 	switch(bdep->mod) {
     59 		case BETAUR_EQ:
     60 			return vercmp == 0;
     61 		case BETAUR_GE:
     62 			return vercmp >= 0;
     63 		case BETAUR_GT:
     64 			return vercmp > 0;
     65 		case BETAUR_LE:
     66 			return vercmp <= 0;
     67 		case BETAUR_LT:
     68 			return vercmp < 0;
     69 		default:
     70 			break;
     71 	}
     72 	return false;
     73 }
     74 
     75 bool betaur_satisfied_by(betaur_package_t bpack) {
     76 	return false;
     77 }